1 | #LyX 1.5.6 created this file. For more info see http://www.lyx.org/
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2 | \lyxformat 276
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3 | \begin_document
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4 | \begin_header
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5 | \textclass revtex4
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6 | \begin_preamble
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7 | \usepackage{listings}
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8 | \usepackage[]{hyperref}
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9 | \end_preamble
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10 | \options rmp, superscriptaddress
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11 | \language english
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26 | \use_amsmath 1
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32 | \tocdepth 3
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33 | \paragraph_separation indent
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34 | \defskip medskip
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35 | \quotes_language english
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36 | \papercolumns 1
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37 | \papersides 2
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38 | \paperpagestyle default
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39 | \tracking_changes false
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40 | \output_changes false
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41 | \author ""
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42 | \author ""
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43 | \end_header
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44 |
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45 | \begin_body
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46 |
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47 | \begin_layout Title
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48 |
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49 | \size huge
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50 | SMMP v.
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51 | 3
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52 | \end_layout
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53 |
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54 | \begin_layout Author
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55 | F.
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56 | Eisenmenger
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57 | \end_layout
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58 |
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59 | \begin_layout Author Email
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60 | eisenmenger@fmp-berlin.de
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61 | \end_layout
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62 |
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63 | \begin_layout Affiliation
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64 | Leibniz-Institut f
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65 | \begin_inset ERT
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66 | status inlined
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67 |
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68 | \begin_layout Standard
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69 |
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70 | {
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71 | \backslash
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72 | "u}
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73 | \end_layout
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74 |
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75 | \end_inset
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76 |
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77 | r Molekulare Pharmakologie, 13125 Berlin, Germany
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78 | \end_layout
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79 |
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80 | \begin_layout Author
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81 | U.H.E.
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82 | Hansmann
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83 | \end_layout
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84 |
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85 | \begin_layout Author Email
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86 | hansmann@mtu.edu
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87 | \end_layout
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88 |
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89 | \begin_layout Affiliation
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90 | Michigan Technological University, Houghton, MI 49931-1291, USA
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91 | \end_layout
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92 |
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93 | \begin_layout Affiliation
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94 | Computational Biology and Biophysics, NIC, 52428 J
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95 | \begin_inset ERT
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96 | status inlined
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97 |
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98 | \begin_layout Standard
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99 |
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100 | {
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101 | \backslash
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102 | "u}
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103 | \end_layout
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104 |
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105 | \end_inset
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106 |
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107 | lich, Germany
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108 | \end_layout
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109 |
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110 | \begin_layout Author
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111 | Sh.
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112 | Hayryan
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113 | \end_layout
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114 |
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115 | \begin_layout Author Email
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116 | shura@phys.sinica.edu.tw
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117 | \end_layout
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118 |
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119 | \begin_layout Author
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120 | C.-K.
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121 | Hu
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122 | \end_layout
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123 |
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124 | \begin_layout Author Email
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125 | huck@phys.sinica.edu.tw
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126 | \end_layout
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127 |
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128 | \begin_layout Affiliation
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129 | Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan
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130 | \end_layout
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131 |
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132 | \begin_layout Author
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133 | J.
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134 | H.
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135 | Meinke
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136 | \end_layout
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137 |
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138 | \begin_layout Author Email
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139 | j.meinke@fz-juelich.de
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140 | \end_layout
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141 |
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142 | \begin_layout Affiliation
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143 | Computational Biology and Biophysics, NIC, 52428 J
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144 | \begin_inset ERT
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145 | status inlined
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146 |
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147 | \begin_layout Standard
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148 |
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149 | {
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150 | \backslash
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151 | "u}
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152 | \end_layout
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153 |
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154 | \end_inset
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155 |
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156 | lich, Germany
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157 | \end_layout
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158 |
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159 | \begin_layout Author
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160 | S.
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161 | Mohanty
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162 | \end_layout
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163 |
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164 | \begin_layout Author Email
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165 | s.mohanty@fz-juelich.de
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166 | \end_layout
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167 |
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168 | \begin_layout Affiliation
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169 | Computational Biology and Biophysics, NIC, 52428 J
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170 | \begin_inset ERT
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171 | status inlined
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172 |
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173 | \begin_layout Standard
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174 |
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175 | {
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176 | \backslash
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177 | "u}
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178 | \end_layout
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179 |
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180 | \end_inset
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181 |
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182 | lich, Germany
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183 | \end_layout
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184 |
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185 | \begin_layout Standard
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186 | \noindent
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187 | \begin_inset LatexCommand tableofcontents
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188 |
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189 | \end_inset
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190 |
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191 |
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192 | \end_layout
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193 |
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194 | \begin_layout Section
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195 | Introduction
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196 | \end_layout
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197 |
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198 | \begin_layout Standard
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199 | The SMMP (
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200 | \series bold
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201 | S
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202 | \series default
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203 | imple
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204 | \series bold
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205 | M
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206 | \series default
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207 | olecular
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208 | \series bold
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209 | M
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210 | \series default
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211 | echanics for
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212 | \series bold
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213 | P
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214 | \series default
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215 | roteins) package is designed for molecular simulations of linear proteins
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216 | within the standard geometry model.
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217 | The package contains various modern Monte Carlo algorithms and energy minimizat
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218 | ion routines.
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219 | The energy of a protein can be calculated by exploiting one of four force
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220 | fields: ECEPP/2, ECEPP/3
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221 | \begin_inset LatexCommand citep
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222 | key "ECEPP3"
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223 |
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224 | \end_inset
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225 |
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226 | , FLEX or Lund.
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227 | Two subroutines for approximating protein-solvent interactions by means
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228 | of calculating the solvent accessible surface area of atomic groups are
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229 | included.
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230 | Nine sets of solvation parameters are available.
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231 | All calculations are done with double precision, but the user can easily
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232 | modify this option by changing the corresponding IMPLICIT statement.
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233 | \end_layout
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234 |
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235 | \begin_layout Standard
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236 | This manual provides the user with the necessary information for installation
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237 | of the program, the format of the input and output files, a brief description
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238 | of the important routines, and describes some limitations of the package.
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239 | A few example runs providing detailed explanation of input and output are
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240 | added.
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241 | More information on SMMP, definitions, background and references for force
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242 | fields and algorithms as used in the program package can be found in
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243 | \begin_inset LatexCommand citep
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244 | key "Eisenmenger2001,Eisenmenger2006"
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245 |
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246 | \end_inset
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247 |
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248 | .
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249 | \end_layout
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250 |
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251 | \begin_layout Standard
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252 | SMMP is offered as Open Source.
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253 | The program is written in standard FORTRAN.
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254 | We encourage users to improve the code and add their own modules.
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255 | Please send us your modifications and additions, so we can add them to
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256 | future releases.
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257 | Or send us a note and let us know where users can download your modules.
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258 | The usage and distribution of the program are governed by the following
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259 | license agreement:
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260 | \newline
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261 |
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262 | \end_layout
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263 |
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264 | \begin_layout Quote
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265 | SMMP is free software; it can be used, modified, and redistributed under
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266 | the terms of the GNU General Public License version 2 (
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267 | \shape italic
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268 | http://www.gnu.org/licenses/gpl.html
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269 | \shape default
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270 | ) as published by the Free Software Foundation, EXCEPT WHERE RESTRICTED
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271 | BY ONE OF THE FOLLOWING CLAUSES.
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272 |
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273 | \newline
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274 | SMMP shall not be used for commercial or military purposes.
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275 | The authors request notification if parts of SMMP are incorporated in other
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276 | programs.
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277 | \newline
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278 | The use of SMMP has to be acknowledged in all resulting publications
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279 | by quoting:
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280 | \shape italic
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281 | F.
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282 | Eisenmenger, U.H.E.
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283 | Hansmann, S.
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284 | Hayryan and C.K.
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285 | Hu,
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286 | \shape default
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287 |
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288 | \series bold
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289 | [SMMP] A Modern Package for Protein Simulations
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290 | \series default
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291 | ,
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292 | \shape italic
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293 | Comp.
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294 | Phys.
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295 | Comm.
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296 | 138 (2001) 192-212
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297 | \shape default
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298 | ;
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299 | \series bold
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300 | An Enhanced Version of SMMP - Open-Source Software Package for Simulation
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301 | of Proteins
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302 | \series default
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303 | ,
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304 | \shape italic
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305 | Comp.
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306 | Phys.
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307 | Comm.
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308 | 174 (2006) 422-
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309 | \shape default
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310 | 429.
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311 |
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312 | \emph on
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313 | J.
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314 | H.
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315 | Meinke, S.
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316 | Mohanty, F.
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317 | Eisenmenger and U.H.E.
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318 | Hansmann,
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319 | \series bold
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320 | \emph default
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321 | SMMP v.
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322 | 3.0 --- Simulating proteins and protein interactions in Python and Fortran
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323 | \series default
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324 | , submitted to
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325 | \emph on
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326 | Comp.\InsetSpace ~
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327 | Phys.\InsetSpace ~
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328 | Comm.
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329 | \emph default
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330 |
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331 | \newline
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332 | SMMP is distributed in the hope that it will be useful, but WITHOUT ANY
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333 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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334 | FOR A PARTICULAR PURPOSE.
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335 | See the GNU General Public License for more details.
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336 |
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337 | \end_layout
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338 |
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339 | \begin_layout Standard
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340 | \noindent
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341 | The most recent version of SMMP can be found on the program package's web
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342 | sites:
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343 | \series bold
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344 | http://www.smmp05.net
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345 | \series default
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346 | or
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347 | \series bold
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348 | http://www.phy.mtu.edu/biophys/smmp.htm
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349 | \series default
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350 | .
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351 | Any suggestions for improvements of the code or reports on bugs are welcome.
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352 | Please send your remarks to the authors.
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353 | \end_layout
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354 |
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355 | \begin_layout Standard
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356 | \noindent
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357 |
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358 | \series bold
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359 | Acknowledgments:
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360 | \series default
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361 |
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362 | \newline
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363 | U.H.
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364 | acknowledges support by a research grant (CHE-9981874) of the National
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365 | Science Foundation (USA).
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366 | S.H.
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367 | and C.K.H.
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368 | are supported by Academia Sinica (Taipei) and by the National Science Council
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369 | of the Republic of China (Taiwan) under Contract No.
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370 | NSC 89-2112-M-001-084.
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371 |
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372 | \begin_inset ERT
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373 | status collapsed
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374 |
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375 | \begin_layout Standard
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376 |
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377 |
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378 | \backslash
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379 | newpage
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380 | \end_layout
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381 |
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382 | \begin_layout Standard
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383 |
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384 | \end_layout
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385 |
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386 | \end_inset
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387 |
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388 |
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389 | \end_layout
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390 |
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391 | \begin_layout Section
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392 | Changes from Previous Version
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393 | \end_layout
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394 |
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395 | \begin_layout Subsection
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396 | New Features
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397 | \end_layout
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398 |
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399 | \begin_layout Subsubsection
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400 | New Force Field
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401 | \end_layout
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402 |
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403 | \begin_layout Paragraph
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404 | Lund Force Field
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405 | \end_layout
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406 |
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407 | \begin_layout Standard
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408 | The Lund force fields is a fast force field that uses a minimal set of parameter
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409 | s to obtain good folding statistics.
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410 | It has been used successfully for protein folding, unfolding, and aggregation
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411 | simulations.
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412 | For details see
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413 | \begin_inset LatexCommand citep
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414 | key "Irback2005"
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415 |
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416 | \end_inset
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417 |
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418 | .
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419 | \end_layout
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420 |
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421 | \begin_layout Subsubsection
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422 | Multi-molecule simulations
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423 | \end_layout
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424 |
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425 | \begin_layout Standard
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426 | SMMP 3.0 implements inter-molecular interactions based on the ECEPP/3 force
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427 | field.
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428 | \end_layout
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429 |
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430 | \begin_layout Subsubsection
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431 | Biased Gaussian Step
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432 | \end_layout
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433 |
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434 | \begin_layout Standard
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435 | A new Monte Carlo move that interpolates smoothly between two nearly fixed
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436 | end points.
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437 | \end_layout
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438 |
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439 | \begin_layout Subsubsection
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440 | Parallel energy calculation
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441 | \end_layout
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442 |
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443 | \begin_layout Standard
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444 | The energy calculation for the ECEPP/3 force field can now be done in parallel
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445 | making it possible to speed up simulations for serial algorithms.
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446 | Combining the parallel energy calculation with parallel tempering, SMMP
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447 | can be used efficiently on 2048 processors on an IBM BlueGene/L super computer.
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448 | \end_layout
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449 |
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450 | \begin_layout Subsubsection
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451 | Python bindings
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452 | \end_layout
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453 |
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454 | \begin_layout Standard
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455 | We now provide Python bindings to SMMP that make the data structure and
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456 | algorithms available from (interactive) Python scripts.
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457 |
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458 | \end_layout
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459 |
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460 | \begin_layout Subsection
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461 | API Changes
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462 | \end_layout
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463 |
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464 | \begin_layout Standard
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465 | In previous versions of SMMP the parameters for each algorithm were given
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466 | in the source code of the algorithm using PARAMETER statements.
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467 | Now, the parameters are passed as function arguments making the program
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468 | much more flexible.
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469 | The following functions and subroutines now have a different signature:
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470 | anneal, canon, minim, mulcan_par, mulcan_sim, outpdb, outvar, partem_p,
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471 | and regul.
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472 | For details see Section\InsetSpace ~
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473 |
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474 | \begin_inset LatexCommand ref
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475 | reference "sec:Frequently-used-Functions"
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476 |
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477 | \end_inset
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478 |
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479 | .
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480 |
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481 | \end_layout
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482 |
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483 | \begin_layout Section
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484 | Installation
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485 | \end_layout
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486 |
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487 | \begin_layout Standard
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488 | SMMP requires a FORTRAN 90 compatbile compiler.
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489 | We have compiled it using gfortran, pgif, xlf, and ifort on various platforms.
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490 | It should compile and link on any platform with a contemporary FORTRAN
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491 | compiler.
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492 | All subroutines are stored in *.f or *.f90 files.An example Makefile is included
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493 | in the package.
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494 | There are no machine dependent routines included in SMMP.
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495 | All COMMON blocks and the limiting parameters are gathered in INCL.H, which
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496 | is attached to the necessary modules through an INCLUDE statement.
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497 | After uncompressing and unpacking (via 'tar -xvf' command) the SMMP package
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498 | into a separate directory For the installation of SMMP the user needs to
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499 | run
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500 | \family typewriter
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501 | make
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502 | \family default
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503 | in the directory with the source code.
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504 | You should edit the Makefile to customize the compiler command and compiler
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505 | options used.
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506 |
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507 | \end_layout
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508 |
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509 | \begin_layout Subsection
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510 | Building pySMMP
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511 | \end_layout
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512 |
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513 | \begin_layout Standard
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514 | This version of SMMP includes Python bindings to SMMP.
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515 | To build them, you need f2py, which is part of the numpy package.
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516 | If f2py is already installed on your system, pySMMP is built by issuing
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517 | the command
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518 | \emph on
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519 | make pybind
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520 | \emph default
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521 | .
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522 |
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523 | \end_layout
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524 |
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525 | \begin_layout Standard
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526 | \begin_inset ERT
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527 | status collapsed
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528 |
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529 | \begin_layout Standard
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530 |
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531 |
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532 | \backslash
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533 | newpage
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534 | \end_layout
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535 |
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536 | \begin_layout Standard
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537 |
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538 | \end_layout
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539 |
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540 | \begin_layout Standard
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541 |
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542 | \end_layout
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543 |
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544 | \end_inset
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545 |
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546 |
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547 | \end_layout
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548 |
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549 | \begin_layout Section
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550 |
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551 | \emph on
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552 | \noun on
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553 | Biased Gaussian Steps
|
---|
554 | \end_layout
|
---|
555 |
|
---|
556 | \begin_layout Subsection
|
---|
557 | Introduction
|
---|
558 | \end_layout
|
---|
559 |
|
---|
560 | \begin_layout Standard
|
---|
561 | The Bias Gaussian Step, BGS for short, is a semi-local conformational update,
|
---|
562 | involving a concerted rotation of the backbone angles of 4 consecutive
|
---|
563 | residues in the protein chain.
|
---|
564 | The upstream part of the protein backbone,
|
---|
565 | \begin_inset Quotes eld
|
---|
566 | \end_inset
|
---|
567 |
|
---|
568 | before
|
---|
569 | \begin_inset Quotes erd
|
---|
570 | \end_inset
|
---|
571 |
|
---|
572 | the first of the 4 residues used for BGS is left unchanged.
|
---|
573 | The downstream part,
|
---|
574 | \begin_inset Quotes eld
|
---|
575 | \end_inset
|
---|
576 |
|
---|
577 | after
|
---|
578 | \begin_inset Quotes erd
|
---|
579 | \end_inset
|
---|
580 |
|
---|
581 | those 4 residues is moved slightly as a rigid body.
|
---|
582 | The section containing the 4 BGS residues is locally deformed.
|
---|
583 |
|
---|
584 | \end_layout
|
---|
585 |
|
---|
586 | \begin_layout Subsection
|
---|
587 | Parameters
|
---|
588 | \end_layout
|
---|
589 |
|
---|
590 | \begin_layout Standard
|
---|
591 | The increments to the backbone angles involved in the update are first chosen
|
---|
592 | from a Gaussian distribution, and then biased to impart minimal changes
|
---|
593 | to the downstream parts of the chain.
|
---|
594 | If this later
|
---|
595 | \begin_inset Quotes eld
|
---|
596 | \end_inset
|
---|
597 |
|
---|
598 | locality
|
---|
599 | \begin_inset Quotes erd
|
---|
600 | \end_inset
|
---|
601 |
|
---|
602 | condition is relaxed, they would be trivially Gaussian-distributed.
|
---|
603 | There are two parameters of relevance, called
|
---|
604 | \begin_inset ERT
|
---|
605 | status open
|
---|
606 |
|
---|
607 | \begin_layout Standard
|
---|
608 |
|
---|
609 | $a_{
|
---|
610 | \backslash
|
---|
611 | mathrm{BGS}}$
|
---|
612 | \end_layout
|
---|
613 |
|
---|
614 | \end_inset
|
---|
615 |
|
---|
616 | and
|
---|
617 | \begin_inset ERT
|
---|
618 | status open
|
---|
619 |
|
---|
620 | \begin_layout Standard
|
---|
621 |
|
---|
622 | $b_{
|
---|
623 | \backslash
|
---|
624 | mathrm{BGS}}$
|
---|
625 | \end_layout
|
---|
626 |
|
---|
627 | \end_inset
|
---|
628 |
|
---|
629 | , declared in the common block
|
---|
630 | \noun on
|
---|
631 | bgs_r
|
---|
632 | \noun default
|
---|
633 | .
|
---|
634 |
|
---|
635 | \begin_inset ERT
|
---|
636 | status open
|
---|
637 |
|
---|
638 | \begin_layout Standard
|
---|
639 |
|
---|
640 | $a_{
|
---|
641 | \backslash
|
---|
642 | mathrm{BGS}}$
|
---|
643 | \end_layout
|
---|
644 |
|
---|
645 | \end_inset
|
---|
646 |
|
---|
647 | controls the size of the increments, and hence directly influences the
|
---|
648 | acceptance rate of the updates.
|
---|
649 | Smaller the value of
|
---|
650 | \begin_inset ERT
|
---|
651 | status open
|
---|
652 |
|
---|
653 | \begin_layout Standard
|
---|
654 |
|
---|
655 | $a_{
|
---|
656 | \backslash
|
---|
657 | mathrm{BGS}}$
|
---|
658 | \end_layout
|
---|
659 |
|
---|
660 | \end_inset
|
---|
661 |
|
---|
662 | , smaller the increments, and hence greater the chances of the update being
|
---|
663 | accepted.
|
---|
664 | Since a trivial zero size update is of little practical interest, even
|
---|
665 | if it is always accepted, it is desirable to have the value of
|
---|
666 | \begin_inset ERT
|
---|
667 | status open
|
---|
668 |
|
---|
669 | \begin_layout Standard
|
---|
670 |
|
---|
671 | $a_{
|
---|
672 | \backslash
|
---|
673 | mathrm{BGS}}$
|
---|
674 | \end_layout
|
---|
675 |
|
---|
676 | \end_inset
|
---|
677 |
|
---|
678 | as large as possible.
|
---|
679 |
|
---|
680 | \begin_inset ERT
|
---|
681 | status open
|
---|
682 |
|
---|
683 | \begin_layout Standard
|
---|
684 |
|
---|
685 | $b_{
|
---|
686 | \backslash
|
---|
687 | mathrm{BGS}}$
|
---|
688 | \end_layout
|
---|
689 |
|
---|
690 | \end_inset
|
---|
691 |
|
---|
692 | controls the degree of locality of the update, i.e., to what extent the downstrea
|
---|
693 | m parts should be allowed to move.
|
---|
694 | Larger
|
---|
695 | \begin_inset ERT
|
---|
696 | status open
|
---|
697 |
|
---|
698 | \begin_layout Standard
|
---|
699 |
|
---|
700 | $b_{
|
---|
701 | \backslash
|
---|
702 | mathrm{BGS}}$
|
---|
703 | \end_layout
|
---|
704 |
|
---|
705 | \end_inset
|
---|
706 |
|
---|
707 | means a stricter locality criterion, and smaller acceptance.
|
---|
708 | These two parameters should not be arbitrarily changed.
|
---|
709 | The default values in SMMP,
|
---|
710 | \begin_inset ERT
|
---|
711 | status open
|
---|
712 |
|
---|
713 | \begin_layout Standard
|
---|
714 |
|
---|
715 | $a_{
|
---|
716 | \backslash
|
---|
717 | mathrm{BGS}}=300$
|
---|
718 | \end_layout
|
---|
719 |
|
---|
720 | \end_inset
|
---|
721 |
|
---|
722 | and
|
---|
723 | \begin_inset ERT
|
---|
724 | status open
|
---|
725 |
|
---|
726 | \begin_layout Standard
|
---|
727 |
|
---|
728 | $b_{
|
---|
729 | \backslash
|
---|
730 | mathrm{BGS}}=10$
|
---|
731 | \end_layout
|
---|
732 |
|
---|
733 | \end_inset
|
---|
734 |
|
---|
735 | are tuned, to ensure maximum acceptance at a reasonable update size and
|
---|
736 | locality constraint.
|
---|
737 |
|
---|
738 | \end_layout
|
---|
739 |
|
---|
740 | \begin_layout Subsection
|
---|
741 | Detailed balance and BGS
|
---|
742 | \end_layout
|
---|
743 |
|
---|
744 | \begin_layout Standard
|
---|
745 | Information about the current state of the protein is used inside BGS to
|
---|
746 | bias the increments towards greater locality.
|
---|
747 | Thus the current conformation affects the distribution of the incremental
|
---|
748 | angles.
|
---|
749 | This means that the reverse update would have a different probability of
|
---|
750 | being proposed.
|
---|
751 | Because of this, in order to ensure detail balance, an extra multiplicative
|
---|
752 | weight factor is needed for BGS along with the standard Metropolis weight,
|
---|
753 | to decide whether an update should be accepted.
|
---|
754 | The implementation of BGS in SMMP calculates this weight and evaluates
|
---|
755 | whether or not the proposed update was accepted.
|
---|
756 |
|
---|
757 | \end_layout
|
---|
758 |
|
---|
759 | \begin_layout Subsection
|
---|
760 | The function BGS in SMMP
|
---|
761 | \end_layout
|
---|
762 |
|
---|
763 | \begin_layout Standard
|
---|
764 | BGS is implemented in SMMP as a function with the following signature:
|
---|
765 | \end_layout
|
---|
766 |
|
---|
767 | \begin_layout Standard
|
---|
768 | integer function bgs(eol1,dummy)
|
---|
769 | \end_layout
|
---|
770 |
|
---|
771 | \begin_layout Standard
|
---|
772 | The parameter eol1 passed to BGS is the energy of the system before the
|
---|
773 | call.
|
---|
774 | The argument
|
---|
775 | \begin_inset Quotes eld
|
---|
776 | \end_inset
|
---|
777 |
|
---|
778 | dummy
|
---|
779 | \begin_inset Quotes erd
|
---|
780 | \end_inset
|
---|
781 |
|
---|
782 | is a function that calculates the exponent of the Metropolis weight function.
|
---|
783 | The return value is 1 for an accepted BGS move and 0 for a rejected move.
|
---|
784 |
|
---|
785 | \end_layout
|
---|
786 |
|
---|
787 | \begin_layout Subsubsection
|
---|
788 | Using BGS in SMMP
|
---|
789 | \end_layout
|
---|
790 |
|
---|
791 | \begin_layout Standard
|
---|
792 | To use BGS, one must ensure that the subroutine init_lund, which initialises
|
---|
793 | several arrays used in BGS, is called during the initialisation phase of
|
---|
794 | the program.
|
---|
795 | These arrays store information about the BGS-capable angles in the protein
|
---|
796 | chain.
|
---|
797 | Therefore, init_lund should be called again, in case the program changes
|
---|
798 | the amino acid sequence of a molecule or the total number of molecules
|
---|
799 | in the system.
|
---|
800 |
|
---|
801 | \end_layout
|
---|
802 |
|
---|
803 | \begin_layout Standard
|
---|
804 | The global switch
|
---|
805 | \noun on
|
---|
806 | upchswitch
|
---|
807 | \noun default
|
---|
808 | controls how BGS is used by the metropolis subroutine, which is normally
|
---|
809 | the routine that calls BGS.
|
---|
810 | For
|
---|
811 | \noun on
|
---|
812 | upchswitch=0, BGS
|
---|
813 | \noun default
|
---|
814 | is never used.
|
---|
815 | For
|
---|
816 | \noun on
|
---|
817 | upchswitch=1,
|
---|
818 | \noun default
|
---|
819 | it is used with a probabilty
|
---|
820 | \noun on
|
---|
821 | bgsprob
|
---|
822 | \noun default
|
---|
823 | , which is another global parameter.
|
---|
824 | For
|
---|
825 | \noun on
|
---|
826 | upchswitch=2,
|
---|
827 | \noun default
|
---|
828 | BGS is used when possible with a temperature dependent probability.
|
---|
829 | At higher temperatures abrupt single angle changes are more effective in
|
---|
830 | browsing the conformation space quickly.
|
---|
831 | A local update like BGS should therefore have a small probability at high
|
---|
832 | temperatures.
|
---|
833 | At low temperatures, often the system is in a compact state with significant
|
---|
834 | secondary structure, and it is desirable to explore the neighbourhood of
|
---|
835 | that state to refine the structure.
|
---|
836 | BGS is more efficient at this compared to single angle updates, and hence
|
---|
837 | should have a higher probability at lower temperatures.
|
---|
838 | The choice,
|
---|
839 | \noun on
|
---|
840 | upchswitch=2
|
---|
841 | \noun default
|
---|
842 | uses this scheme for BGS use.
|
---|
843 |
|
---|
844 | \end_layout
|
---|
845 |
|
---|
846 | \begin_layout Section
|
---|
847 | Getting Started
|
---|
848 | \end_layout
|
---|
849 |
|
---|
850 | \begin_layout Standard
|
---|
851 | The quickest way to get started is to use one of the examples in the EXAMPLES
|
---|
852 | directory as a template.
|
---|
853 | The examples are described in Section\InsetSpace ~
|
---|
854 |
|
---|
855 | \begin_inset LatexCommand ref
|
---|
856 | reference "sec:Examples"
|
---|
857 |
|
---|
858 | \end_inset
|
---|
859 |
|
---|
860 | .
|
---|
861 | \end_layout
|
---|
862 |
|
---|
863 | \begin_layout Standard
|
---|
864 | SMMP does not include an interpretor of user-defined commands instead the
|
---|
865 | preparation of a simulation is done in the MAIN module calling corresponding
|
---|
866 | simulation subroutine(s).
|
---|
867 | After adjusting MAIN to your needs, SMMP has to be re-compiled.
|
---|
868 | We provide a sample main file with detailed comments.
|
---|
869 | For a comment-free version see Listing
|
---|
870 | \begin_inset LatexCommand ref
|
---|
871 | reference "listing:mainmc"
|
---|
872 |
|
---|
873 | \end_inset
|
---|
874 |
|
---|
875 | .
|
---|
876 |
|
---|
877 | \end_layout
|
---|
878 |
|
---|
879 | \begin_layout Standard
|
---|
880 | \begin_inset listings
|
---|
881 | lstparams "float=h,language=Fortran,numbers=left"
|
---|
882 | inline false
|
---|
883 | status open
|
---|
884 |
|
---|
885 | \begin_layout Standard
|
---|
886 |
|
---|
887 | program main
|
---|
888 | \end_layout
|
---|
889 |
|
---|
890 | \begin_layout Standard
|
---|
891 |
|
---|
892 | include "../INCL.H"
|
---|
893 | \end_layout
|
---|
894 |
|
---|
895 | \begin_layout Standard
|
---|
896 |
|
---|
897 |
|
---|
898 | \end_layout
|
---|
899 |
|
---|
900 | \begin_layout Standard
|
---|
901 |
|
---|
902 | character*80 libdir, seqfile, varfile
|
---|
903 | \end_layout
|
---|
904 |
|
---|
905 | \begin_layout Standard
|
---|
906 |
|
---|
907 | character grpn*4,grpc*4
|
---|
908 | \end_layout
|
---|
909 |
|
---|
910 | \begin_layout Standard
|
---|
911 |
|
---|
912 | integer nequi, nsweeps, nmes
|
---|
913 | \end_layout
|
---|
914 |
|
---|
915 | \begin_layout Standard
|
---|
916 |
|
---|
917 | double precision tmax, tmin
|
---|
918 | \end_layout
|
---|
919 |
|
---|
920 | \begin_layout Standard
|
---|
921 |
|
---|
922 | logical lrand
|
---|
923 | \end_layout
|
---|
924 |
|
---|
925 | \begin_layout Standard
|
---|
926 |
|
---|
927 | \end_layout
|
---|
928 |
|
---|
929 | \begin_layout Standard
|
---|
930 |
|
---|
931 | libdir = '../SMMP/'
|
---|
932 | \end_layout
|
---|
933 |
|
---|
934 | \begin_layout Standard
|
---|
935 |
|
---|
936 | ientyp = 0
|
---|
937 | \end_layout
|
---|
938 |
|
---|
939 | \begin_layout Standard
|
---|
940 |
|
---|
941 | sh2 = .true.
|
---|
942 |
|
---|
943 | \end_layout
|
---|
944 |
|
---|
945 | \begin_layout Standard
|
---|
946 |
|
---|
947 | itysol = 0
|
---|
948 | \end_layout
|
---|
949 |
|
---|
950 | \begin_layout Standard
|
---|
951 |
|
---|
952 | call init_energy(libdir)
|
---|
953 | \end_layout
|
---|
954 |
|
---|
955 | \begin_layout Standard
|
---|
956 |
|
---|
957 | \end_layout
|
---|
958 |
|
---|
959 | \begin_layout Standard
|
---|
960 |
|
---|
961 | grpn = 'nh2'
|
---|
962 | \end_layout
|
---|
963 |
|
---|
964 | \begin_layout Standard
|
---|
965 |
|
---|
966 | grpc = 'cooh'
|
---|
967 | \end_layout
|
---|
968 |
|
---|
969 | \begin_layout Standard
|
---|
970 |
|
---|
971 | iabin = 1
|
---|
972 | \end_layout
|
---|
973 |
|
---|
974 | \begin_layout Standard
|
---|
975 |
|
---|
976 | seqfile='EXAMPLES/enkefa.seq'
|
---|
977 | \end_layout
|
---|
978 |
|
---|
979 | \begin_layout Standard
|
---|
980 |
|
---|
981 | varfile='EXAMPLES/enkefa.var'
|
---|
982 | \end_layout
|
---|
983 |
|
---|
984 | \begin_layout Standard
|
---|
985 |
|
---|
986 | ntlml = 0
|
---|
987 | \end_layout
|
---|
988 |
|
---|
989 | \begin_layout Standard
|
---|
990 |
|
---|
991 | call init_molecule(iabin,grpn,grpc,seqfile,varfile)
|
---|
992 | \end_layout
|
---|
993 |
|
---|
994 | \begin_layout Standard
|
---|
995 |
|
---|
996 | \end_layout
|
---|
997 |
|
---|
998 | \begin_layout Standard
|
---|
999 |
|
---|
1000 | seed = 81236
|
---|
1001 | \end_layout
|
---|
1002 |
|
---|
1003 | \begin_layout Standard
|
---|
1004 |
|
---|
1005 | call sgrnd(seed)
|
---|
1006 | \end_layout
|
---|
1007 |
|
---|
1008 | \begin_layout Standard
|
---|
1009 |
|
---|
1010 | upchswitch= 0
|
---|
1011 | \end_layout
|
---|
1012 |
|
---|
1013 | \begin_layout Standard
|
---|
1014 |
|
---|
1015 |
|
---|
1016 | \end_layout
|
---|
1017 |
|
---|
1018 | \begin_layout Standard
|
---|
1019 |
|
---|
1020 | nequi=100
|
---|
1021 | \end_layout
|
---|
1022 |
|
---|
1023 | \begin_layout Standard
|
---|
1024 |
|
---|
1025 | nsweeps=100000
|
---|
1026 | \end_layout
|
---|
1027 |
|
---|
1028 | \begin_layout Standard
|
---|
1029 |
|
---|
1030 | nmes=1000
|
---|
1031 | \end_layout
|
---|
1032 |
|
---|
1033 | \begin_layout Standard
|
---|
1034 |
|
---|
1035 | temp = 300
|
---|
1036 | \end_layout
|
---|
1037 |
|
---|
1038 | \begin_layout Standard
|
---|
1039 |
|
---|
1040 | lrand=.true.
|
---|
1041 |
|
---|
1042 | \end_layout
|
---|
1043 |
|
---|
1044 | \begin_layout Standard
|
---|
1045 |
|
---|
1046 | call canon(nequi, nsweeps, nmes, temp,lrand)
|
---|
1047 | \end_layout
|
---|
1048 |
|
---|
1049 | \begin_layout Standard
|
---|
1050 |
|
---|
1051 |
|
---|
1052 | \end_layout
|
---|
1053 |
|
---|
1054 | \begin_layout Standard
|
---|
1055 |
|
---|
1056 | end program main
|
---|
1057 | \end_layout
|
---|
1058 |
|
---|
1059 | \begin_layout Standard
|
---|
1060 |
|
---|
1061 | \begin_inset Caption
|
---|
1062 |
|
---|
1063 | \begin_layout Standard
|
---|
1064 | The basic main function for a Monte Carlo Simulation
|
---|
1065 | \begin_inset LatexCommand label
|
---|
1066 | name "listing:mainmc"
|
---|
1067 |
|
---|
1068 | \end_inset
|
---|
1069 |
|
---|
1070 |
|
---|
1071 | \end_layout
|
---|
1072 |
|
---|
1073 | \end_inset
|
---|
1074 |
|
---|
1075 |
|
---|
1076 | \end_layout
|
---|
1077 |
|
---|
1078 | \end_inset
|
---|
1079 |
|
---|
1080 |
|
---|
1081 | \end_layout
|
---|
1082 |
|
---|
1083 | \begin_layout Standard
|
---|
1084 | The following steps summarize how to run SMMP:
|
---|
1085 | \end_layout
|
---|
1086 |
|
---|
1087 | \begin_layout Enumerate
|
---|
1088 | Assign the path to the directory containing the standard amino acid residue
|
---|
1089 | libraries and the file 'charges' to the character variable 'libdir' (Line
|
---|
1090 | 10).
|
---|
1091 | \end_layout
|
---|
1092 |
|
---|
1093 | \begin_layout Enumerate
|
---|
1094 | Select the force field and solvation model by setting the four paramters
|
---|
1095 | 'flex', 'sh2', 'epsd', and 'itysol' to their appropriate values:
|
---|
1096 | \begin_inset ERT
|
---|
1097 | status open
|
---|
1098 |
|
---|
1099 | \begin_layout Standard
|
---|
1100 |
|
---|
1101 |
|
---|
1102 | \backslash
|
---|
1103 | begin{verbatim}
|
---|
1104 | \end_layout
|
---|
1105 |
|
---|
1106 | \begin_layout Standard
|
---|
1107 |
|
---|
1108 | * ientyp = 0 : ECEPP
|
---|
1109 | \end_layout
|
---|
1110 |
|
---|
1111 | \begin_layout Standard
|
---|
1112 |
|
---|
1113 | 1 : FLEX
|
---|
1114 | \end_layout
|
---|
1115 |
|
---|
1116 | \begin_layout Standard
|
---|
1117 |
|
---|
1118 | 2 : LUND
|
---|
1119 | \end_layout
|
---|
1120 |
|
---|
1121 | \begin_layout Standard
|
---|
1122 |
|
---|
1123 | 3 : ECEPP + Abagyan
|
---|
1124 | \end_layout
|
---|
1125 |
|
---|
1126 | \begin_layout Standard
|
---|
1127 |
|
---|
1128 | * sh2 =.TRUE.
|
---|
1129 | : ECEPP/2 potential, sh2=.FALSE.: ECEPP/3
|
---|
1130 | \end_layout
|
---|
1131 |
|
---|
1132 | \begin_layout Standard
|
---|
1133 |
|
---|
1134 | * epsd=.TRUE.
|
---|
1135 | : Distant dependent dielectric permittivity
|
---|
1136 | \end_layout
|
---|
1137 |
|
---|
1138 | \begin_layout Standard
|
---|
1139 |
|
---|
1140 | epsd=.FALSE.
|
---|
1141 | : epsilon = 2
|
---|
1142 | \end_layout
|
---|
1143 |
|
---|
1144 | \begin_layout Standard
|
---|
1145 |
|
---|
1146 | * itysol = 0 : gas phase,
|
---|
1147 | \end_layout
|
---|
1148 |
|
---|
1149 | \begin_layout Standard
|
---|
1150 |
|
---|
1151 | itysol > 0 : approximation of protein-solvent interactions by means
|
---|
1152 | \end_layout
|
---|
1153 |
|
---|
1154 | \begin_layout Standard
|
---|
1155 |
|
---|
1156 | of a solvent accessible surface area approach with
|
---|
1157 | \end_layout
|
---|
1158 |
|
---|
1159 | \begin_layout Standard
|
---|
1160 |
|
---|
1161 | numerical estimation of the accessible area,
|
---|
1162 | \end_layout
|
---|
1163 |
|
---|
1164 | \begin_layout Standard
|
---|
1165 |
|
---|
1166 | itysol < 0 : same as above, but the accessible area is calculated
|
---|
1167 | \end_layout
|
---|
1168 |
|
---|
1169 | \begin_layout Standard
|
---|
1170 |
|
---|
1171 | analytically (considerably than itysol > 0).
|
---|
1172 | \end_layout
|
---|
1173 |
|
---|
1174 | \begin_layout Standard
|
---|
1175 |
|
---|
1176 |
|
---|
1177 | \backslash
|
---|
1178 | end{verbatim}
|
---|
1179 | \end_layout
|
---|
1180 |
|
---|
1181 | \end_inset
|
---|
1182 |
|
---|
1183 | (Line 11--13).
|
---|
1184 | \end_layout
|
---|
1185 |
|
---|
1186 | \begin_layout Enumerate
|
---|
1187 |
|
---|
1188 | \shape italic
|
---|
1189 | call init_energy(libdir)
|
---|
1190 | \shape default
|
---|
1191 | to initialize the energy parametrization (Line 12).
|
---|
1192 | \end_layout
|
---|
1193 |
|
---|
1194 | \begin_layout Enumerate
|
---|
1195 | Choose the N-terminal and C-terminal groups by assigning to appropriate
|
---|
1196 | strings to variables 'grpn' and 'grpc' (Line 16--17)
|
---|
1197 | \end_layout
|
---|
1198 |
|
---|
1199 | \begin_layout Enumerate
|
---|
1200 | Choose how the initial input is read in:
|
---|
1201 | \begin_inset ERT
|
---|
1202 | status collapsed
|
---|
1203 |
|
---|
1204 | \begin_layout Standard
|
---|
1205 |
|
---|
1206 |
|
---|
1207 | \backslash
|
---|
1208 | begin{verbatim}
|
---|
1209 | \end_layout
|
---|
1210 |
|
---|
1211 | \begin_layout Standard
|
---|
1212 |
|
---|
1213 | * iabin = 0 : read from PDB-file
|
---|
1214 | \end_layout
|
---|
1215 |
|
---|
1216 | \begin_layout Standard
|
---|
1217 |
|
---|
1218 | * iabin = 1 : read from sequence (and configuration) file
|
---|
1219 | \end_layout
|
---|
1220 |
|
---|
1221 | \begin_layout Standard
|
---|
1222 |
|
---|
1223 |
|
---|
1224 | \backslash
|
---|
1225 | end{verbatim}
|
---|
1226 | \end_layout
|
---|
1227 |
|
---|
1228 | \end_inset
|
---|
1229 |
|
---|
1230 | (Line 18)
|
---|
1231 | \end_layout
|
---|
1232 |
|
---|
1233 | \begin_layout Enumerate
|
---|
1234 | Enter the names of the corresponding file(s) '
|
---|
1235 | \shape italic
|
---|
1236 | seqfil
|
---|
1237 | \shape default
|
---|
1238 | ' and '
|
---|
1239 | \shape italic
|
---|
1240 | varfil
|
---|
1241 | \shape default
|
---|
1242 | ' (Line 19--20).
|
---|
1243 | If there are empty, they'll be requested through an interactive command
|
---|
1244 | line dialog, issued by '
|
---|
1245 | \shape italic
|
---|
1246 | call init_molecule
|
---|
1247 | \shape default
|
---|
1248 | ' (Line 22).
|
---|
1249 | The user can easily just supply the corresponding file names in a "here
|
---|
1250 | document", as shown in the example scripts .
|
---|
1251 | \end_layout
|
---|
1252 |
|
---|
1253 | \begin_layout Enumerate
|
---|
1254 | At this point the program is ready for calling task subroutines.
|
---|
1255 | Here we perform a canonical Monte Carlo simulation at T=300K.
|
---|
1256 | Two kinds of updates are avaible: a single angle update and the biased
|
---|
1257 | Gaussian step (bgs).
|
---|
1258 | For this simulation we turn bgs off by setting
|
---|
1259 | \family typewriter
|
---|
1260 | upchswitch=0
|
---|
1261 | \family default
|
---|
1262 | .
|
---|
1263 | Detailed examples for this and other simulation tasks can be found in the
|
---|
1264 | following section.
|
---|
1265 | Normally, simulation subroutines write data in output files, but one can
|
---|
1266 | also use output routines such as `
|
---|
1267 | \shape italic
|
---|
1268 | outpdb
|
---|
1269 | \shape default
|
---|
1270 | ' in '
|
---|
1271 | \shape italic
|
---|
1272 | main
|
---|
1273 | \shape default
|
---|
1274 | '.
|
---|
1275 | The minimal output (written into standard output) is the name of the sequence
|
---|
1276 | file (extension .seq), name of configuration file (extension .var), and for
|
---|
1277 | each residue a list of dihedral angles together with their initially assigned
|
---|
1278 | values.
|
---|
1279 |
|
---|
1280 | \end_layout
|
---|
1281 |
|
---|
1282 | \begin_layout Enumerate
|
---|
1283 | For parallel tempering jobs on on a multiprocessor system one has to replace
|
---|
1284 | '
|
---|
1285 | \shape italic
|
---|
1286 | main
|
---|
1287 | \shape default
|
---|
1288 | ' by '
|
---|
1289 | \shape italic
|
---|
1290 | pmain
|
---|
1291 | \shape default
|
---|
1292 | '.
|
---|
1293 | The above protocol still applies, but one has to provide in addition the
|
---|
1294 | number of nodes with the variable '
|
---|
1295 | \shape italic
|
---|
1296 | no
|
---|
1297 | \shape default
|
---|
1298 | '.
|
---|
1299 |
|
---|
1300 | \end_layout
|
---|
1301 |
|
---|
1302 | \begin_layout Section
|
---|
1303 | Programming with SMMP
|
---|
1304 | \end_layout
|
---|
1305 |
|
---|
1306 | \begin_layout Standard
|
---|
1307 | While SMMP provides several efficient sampling algorithms, you may want
|
---|
1308 | to improve an existing or implement a new algorithm.
|
---|
1309 | This section goes into more details and explains some of the nuts and bolts
|
---|
1310 | of SMMP.
|
---|
1311 | \end_layout
|
---|
1312 |
|
---|
1313 | \begin_layout Paragraph
|
---|
1314 | Where can I find information about atoms, residues, proteins, and dihedrals
|
---|
1315 | \end_layout
|
---|
1316 |
|
---|
1317 | \begin_layout Standard
|
---|
1318 | Configurations are stored in one dimensional arrays defined in INCL.H and
|
---|
1319 | shared through common blocks.
|
---|
1320 | \begin_inset Note Note
|
---|
1321 | status collapsed
|
---|
1322 |
|
---|
1323 | \begin_layout Standard
|
---|
1324 | I hope, we'll have moved most of the arrays to modules before publication.
|
---|
1325 | \end_layout
|
---|
1326 |
|
---|
1327 | \end_inset
|
---|
1328 |
|
---|
1329 | It helps to think somewhat object oriented to understand the structure
|
---|
1330 | of the arrays.
|
---|
1331 | In general integer arrays start with the letter 'i'.
|
---|
1332 | The abbreviation 'ml' relates to molecules, 'rs' to residues, and 'at'
|
---|
1333 | to atoms.
|
---|
1334 | Several boundary arrays are pointers to the first and last element and
|
---|
1335 | end in '1' for the first element and '2' for the last element.
|
---|
1336 | For example, irsml1(i) is the index of the first residue in molecule
|
---|
1337 | \begin_inset Formula $i$
|
---|
1338 | \end_inset
|
---|
1339 |
|
---|
1340 | , iatrs1(irsml(i)) is the index of the first atom of the first residue of
|
---|
1341 | molecule
|
---|
1342 | \begin_inset Formula $i$
|
---|
1343 | \end_inset
|
---|
1344 |
|
---|
1345 | .
|
---|
1346 | If iat = iatrs1(irsml(i)), then we can access the coordinates of the atom
|
---|
1347 | using xat(iat), yat(iat), z(iat).
|
---|
1348 | Using this scheme we can cycle through all the atoms in the system.
|
---|
1349 | An example is shown in Listing
|
---|
1350 | \begin_inset ERT
|
---|
1351 | status open
|
---|
1352 |
|
---|
1353 | \begin_layout Standard
|
---|
1354 |
|
---|
1355 |
|
---|
1356 | \backslash
|
---|
1357 | ref{listing:outpdb}
|
---|
1358 | \end_layout
|
---|
1359 |
|
---|
1360 | \end_inset
|
---|
1361 |
|
---|
1362 | .
|
---|
1363 |
|
---|
1364 | \begin_inset ERT
|
---|
1365 | status open
|
---|
1366 |
|
---|
1367 | \begin_layout Standard
|
---|
1368 |
|
---|
1369 |
|
---|
1370 | \backslash
|
---|
1371 | lstset{language=Fortran}
|
---|
1372 | \end_layout
|
---|
1373 |
|
---|
1374 | \begin_layout Standard
|
---|
1375 |
|
---|
1376 |
|
---|
1377 | \backslash
|
---|
1378 | begin{lstlisting}[float=p, caption={Using the indices to cycle through all
|
---|
1379 | the atoms in the system.
|
---|
1380 | This snippet is taken from the subroutine outpdb, which writes the current
|
---|
1381 | configuration to a file using the pdb format.}, label=listing:outpdb]
|
---|
1382 | \end_layout
|
---|
1383 |
|
---|
1384 | \begin_layout Standard
|
---|
1385 |
|
---|
1386 | irs=0
|
---|
1387 | \end_layout
|
---|
1388 |
|
---|
1389 | \begin_layout Standard
|
---|
1390 |
|
---|
1391 | iat0 = 0
|
---|
1392 | \end_layout
|
---|
1393 |
|
---|
1394 | \begin_layout Standard
|
---|
1395 |
|
---|
1396 | do inml = nml0, nml1
|
---|
1397 | \end_layout
|
---|
1398 |
|
---|
1399 | \begin_layout Standard
|
---|
1400 |
|
---|
1401 | iat = iat0
|
---|
1402 | \end_layout
|
---|
1403 |
|
---|
1404 | \begin_layout Standard
|
---|
1405 |
|
---|
1406 | chid = char(64 + inml)
|
---|
1407 | \end_layout
|
---|
1408 |
|
---|
1409 | \begin_layout Standard
|
---|
1410 |
|
---|
1411 | ifirs=irsml1(inml)
|
---|
1412 | \end_layout
|
---|
1413 |
|
---|
1414 | \begin_layout Standard
|
---|
1415 |
|
---|
1416 | ifiat=iatrs1(ifirs)
|
---|
1417 | \end_layout
|
---|
1418 |
|
---|
1419 | \begin_layout Standard
|
---|
1420 |
|
---|
1421 | do nrs=ifirs,irsml2(inml)
|
---|
1422 | \end_layout
|
---|
1423 |
|
---|
1424 | \begin_layout Standard
|
---|
1425 |
|
---|
1426 | irs=irs+1
|
---|
1427 | \end_layout
|
---|
1428 |
|
---|
1429 | \begin_layout Standard
|
---|
1430 |
|
---|
1431 | res(1:)=seq(nrs)(1:3)
|
---|
1432 | \end_layout
|
---|
1433 |
|
---|
1434 | \begin_layout Standard
|
---|
1435 |
|
---|
1436 | do i=iatrs1(nrs),iatrs2(nrs)
|
---|
1437 | \end_layout
|
---|
1438 |
|
---|
1439 | \begin_layout Standard
|
---|
1440 |
|
---|
1441 | iat=iat+1
|
---|
1442 | \end_layout
|
---|
1443 |
|
---|
1444 | \begin_layout Standard
|
---|
1445 |
|
---|
1446 | atnm=' '
|
---|
1447 | \end_layout
|
---|
1448 |
|
---|
1449 | \begin_layout Standard
|
---|
1450 |
|
---|
1451 | atnm(2:5)=nmat(i) ! nmat(i) contains the name of atom i
|
---|
1452 | \end_layout
|
---|
1453 |
|
---|
1454 | \begin_layout Standard
|
---|
1455 |
|
---|
1456 | if (atnm(5:5).ne.' ') then
|
---|
1457 | \end_layout
|
---|
1458 |
|
---|
1459 | \begin_layout Standard
|
---|
1460 |
|
---|
1461 | atnm(1:1)=atnm(5:5) !!
|
---|
1462 | \end_layout
|
---|
1463 |
|
---|
1464 | \begin_layout Standard
|
---|
1465 |
|
---|
1466 | atnm(5:5)=' '
|
---|
1467 | \end_layout
|
---|
1468 |
|
---|
1469 | \begin_layout Standard
|
---|
1470 |
|
---|
1471 | endif
|
---|
1472 | \end_layout
|
---|
1473 |
|
---|
1474 | \begin_layout Standard
|
---|
1475 |
|
---|
1476 | z=zat(i)-rz
|
---|
1477 | \end_layout
|
---|
1478 |
|
---|
1479 | \begin_layout Standard
|
---|
1480 |
|
---|
1481 | call toupst(atnm) ! converts a string to all uppercase
|
---|
1482 | \end_layout
|
---|
1483 |
|
---|
1484 | \begin_layout Standard
|
---|
1485 |
|
---|
1486 | call toupst(res)
|
---|
1487 | \end_layout
|
---|
1488 |
|
---|
1489 | \begin_layout Standard
|
---|
1490 |
|
---|
1491 | \end_layout
|
---|
1492 |
|
---|
1493 | \begin_layout Standard
|
---|
1494 |
|
---|
1495 | write (npdb,1) 'ATOM',iat,atnm,res(1:3),chid,irs,cdin,
|
---|
1496 | \end_layout
|
---|
1497 |
|
---|
1498 | \begin_layout Standard
|
---|
1499 |
|
---|
1500 | xat(i), yat(i),zat(i),occ,bva
|
---|
1501 |
|
---|
1502 | \end_layout
|
---|
1503 |
|
---|
1504 | \begin_layout Standard
|
---|
1505 |
|
---|
1506 | enddo
|
---|
1507 | \end_layout
|
---|
1508 |
|
---|
1509 | \begin_layout Standard
|
---|
1510 |
|
---|
1511 | enddo
|
---|
1512 | \end_layout
|
---|
1513 |
|
---|
1514 | \begin_layout Standard
|
---|
1515 |
|
---|
1516 | enddo
|
---|
1517 | \end_layout
|
---|
1518 |
|
---|
1519 | \begin_layout Standard
|
---|
1520 |
|
---|
1521 |
|
---|
1522 | \backslash
|
---|
1523 | end{lstlisting}
|
---|
1524 | \end_layout
|
---|
1525 |
|
---|
1526 | \end_inset
|
---|
1527 |
|
---|
1528 |
|
---|
1529 | \begin_inset Float table
|
---|
1530 | placement p
|
---|
1531 | wide false
|
---|
1532 | sideways false
|
---|
1533 | status collapsed
|
---|
1534 |
|
---|
1535 | \begin_layout Standard
|
---|
1536 | \begin_inset Tabular
|
---|
1537 | <lyxtabular version="3" rows="9" columns="3">
|
---|
1538 | <features>
|
---|
1539 | <column alignment="center" valignment="top" leftline="true" width="0">
|
---|
1540 | <column alignment="center" valignment="top" leftline="true" width="0">
|
---|
1541 | <column alignment="left" valignment="top" leftline="true" rightline="true" width="35col%">
|
---|
1542 | <row topline="true" bottomline="true">
|
---|
1543 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1544 | \begin_inset Text
|
---|
1545 |
|
---|
1546 | \begin_layout Standard
|
---|
1547 | Variable Name
|
---|
1548 | \end_layout
|
---|
1549 |
|
---|
1550 | \end_inset
|
---|
1551 | </cell>
|
---|
1552 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1553 | \begin_inset Text
|
---|
1554 |
|
---|
1555 | \begin_layout Standard
|
---|
1556 | Type
|
---|
1557 | \end_layout
|
---|
1558 |
|
---|
1559 | \end_inset
|
---|
1560 | </cell>
|
---|
1561 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1562 | \begin_inset Text
|
---|
1563 |
|
---|
1564 | \begin_layout Standard
|
---|
1565 | Description
|
---|
1566 | \end_layout
|
---|
1567 |
|
---|
1568 | \end_inset
|
---|
1569 | </cell>
|
---|
1570 | </row>
|
---|
1571 | <row topline="true">
|
---|
1572 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1573 | \begin_inset Text
|
---|
1574 |
|
---|
1575 | \begin_layout Standard
|
---|
1576 | ityat
|
---|
1577 | \end_layout
|
---|
1578 |
|
---|
1579 | \end_inset
|
---|
1580 | </cell>
|
---|
1581 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1582 | \begin_inset Text
|
---|
1583 |
|
---|
1584 | \begin_layout Standard
|
---|
1585 | array of int
|
---|
1586 | \end_layout
|
---|
1587 |
|
---|
1588 | \end_inset
|
---|
1589 | </cell>
|
---|
1590 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1591 | \begin_inset Text
|
---|
1592 |
|
---|
1593 | \begin_layout Standard
|
---|
1594 | Index of type of atom
|
---|
1595 | \end_layout
|
---|
1596 |
|
---|
1597 | \end_inset
|
---|
1598 | </cell>
|
---|
1599 | </row>
|
---|
1600 | <row topline="true">
|
---|
1601 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1602 | \begin_inset Text
|
---|
1603 |
|
---|
1604 | \begin_layout Standard
|
---|
1605 | xat, yat, zat
|
---|
1606 | \end_layout
|
---|
1607 |
|
---|
1608 | \end_inset
|
---|
1609 | </cell>
|
---|
1610 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1611 | \begin_inset Text
|
---|
1612 |
|
---|
1613 | \begin_layout Standard
|
---|
1614 | arrays of double
|
---|
1615 | \end_layout
|
---|
1616 |
|
---|
1617 | \end_inset
|
---|
1618 | </cell>
|
---|
1619 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1620 | \begin_inset Text
|
---|
1621 |
|
---|
1622 | \begin_layout Standard
|
---|
1623 | Cartesian coordinates of atom
|
---|
1624 | \end_layout
|
---|
1625 |
|
---|
1626 | \end_inset
|
---|
1627 | </cell>
|
---|
1628 | </row>
|
---|
1629 | <row topline="true">
|
---|
1630 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1631 | \begin_inset Text
|
---|
1632 |
|
---|
1633 | \begin_layout Standard
|
---|
1634 | cgat
|
---|
1635 | \end_layout
|
---|
1636 |
|
---|
1637 | \end_inset
|
---|
1638 | </cell>
|
---|
1639 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1640 | \begin_inset Text
|
---|
1641 |
|
---|
1642 | \begin_layout Standard
|
---|
1643 | array of double
|
---|
1644 | \end_layout
|
---|
1645 |
|
---|
1646 | \end_inset
|
---|
1647 | </cell>
|
---|
1648 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1649 | \begin_inset Text
|
---|
1650 |
|
---|
1651 | \begin_layout Standard
|
---|
1652 | Partial electric charge on atom
|
---|
1653 | \end_layout
|
---|
1654 |
|
---|
1655 | \end_inset
|
---|
1656 | </cell>
|
---|
1657 | </row>
|
---|
1658 | <row topline="true">
|
---|
1659 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1660 | \begin_inset Text
|
---|
1661 |
|
---|
1662 | \begin_layout Standard
|
---|
1663 | nmat
|
---|
1664 | \end_layout
|
---|
1665 |
|
---|
1666 | \end_inset
|
---|
1667 | </cell>
|
---|
1668 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1669 | \begin_inset Text
|
---|
1670 |
|
---|
1671 | \begin_layout Standard
|
---|
1672 | array of character*4
|
---|
1673 | \end_layout
|
---|
1674 |
|
---|
1675 | \end_inset
|
---|
1676 | </cell>
|
---|
1677 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1678 | \begin_inset Text
|
---|
1679 |
|
---|
1680 | \begin_layout Standard
|
---|
1681 | Name of atom, e.g., C, N, O, H1, H2
|
---|
1682 | \end_layout
|
---|
1683 |
|
---|
1684 | \end_inset
|
---|
1685 | </cell>
|
---|
1686 | </row>
|
---|
1687 | <row topline="true">
|
---|
1688 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1689 | \begin_inset Text
|
---|
1690 |
|
---|
1691 | \begin_layout Standard
|
---|
1692 | iowat
|
---|
1693 | \end_layout
|
---|
1694 |
|
---|
1695 | \end_inset
|
---|
1696 | </cell>
|
---|
1697 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1698 | \begin_inset Text
|
---|
1699 |
|
---|
1700 | \begin_layout Standard
|
---|
1701 | array of int
|
---|
1702 | \end_layout
|
---|
1703 |
|
---|
1704 | \end_inset
|
---|
1705 | </cell>
|
---|
1706 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1707 | \begin_inset Text
|
---|
1708 |
|
---|
1709 | \begin_layout Standard
|
---|
1710 | Index of preceeding atom (see Fig.\InsetSpace ~
|
---|
1711 |
|
---|
1712 | \begin_inset LatexCommand ref
|
---|
1713 | reference "fig:Enumeration-of-atoms"
|
---|
1714 |
|
---|
1715 | \end_inset
|
---|
1716 |
|
---|
1717 | ), 0 if no preceeding atom.
|
---|
1718 | \end_layout
|
---|
1719 |
|
---|
1720 | \end_inset
|
---|
1721 | </cell>
|
---|
1722 | </row>
|
---|
1723 | <row topline="true">
|
---|
1724 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1725 | \begin_inset Text
|
---|
1726 |
|
---|
1727 | \begin_layout Standard
|
---|
1728 | iyowat
|
---|
1729 | \end_layout
|
---|
1730 |
|
---|
1731 | \end_inset
|
---|
1732 | </cell>
|
---|
1733 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1734 | \begin_inset Text
|
---|
1735 |
|
---|
1736 | \begin_layout Standard
|
---|
1737 | array of int
|
---|
1738 | \end_layout
|
---|
1739 |
|
---|
1740 | \end_inset
|
---|
1741 | </cell>
|
---|
1742 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1743 | \begin_inset Text
|
---|
1744 |
|
---|
1745 | \begin_layout Standard
|
---|
1746 | Type of bond with preceeding atom.
|
---|
1747 | \begin_inset Note Note
|
---|
1748 | status open
|
---|
1749 |
|
---|
1750 | \begin_layout Standard
|
---|
1751 | Maybe, this should be called ityinbdat.
|
---|
1752 | \end_layout
|
---|
1753 |
|
---|
1754 | \end_inset
|
---|
1755 |
|
---|
1756 |
|
---|
1757 | \end_layout
|
---|
1758 |
|
---|
1759 | \end_inset
|
---|
1760 | </cell>
|
---|
1761 | </row>
|
---|
1762 | <row topline="true" bottomline="true">
|
---|
1763 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1764 | \begin_inset Text
|
---|
1765 |
|
---|
1766 | \begin_layout Standard
|
---|
1767 | nbdat
|
---|
1768 | \end_layout
|
---|
1769 |
|
---|
1770 | \end_inset
|
---|
1771 | </cell>
|
---|
1772 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1773 | \begin_inset Text
|
---|
1774 |
|
---|
1775 | \begin_layout Standard
|
---|
1776 | array of int
|
---|
1777 | \end_layout
|
---|
1778 |
|
---|
1779 | \end_inset
|
---|
1780 | </cell>
|
---|
1781 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1782 | \begin_inset Text
|
---|
1783 |
|
---|
1784 | \begin_layout Standard
|
---|
1785 | Number of bonds to succeeding atom (outgoing bonds)
|
---|
1786 | \end_layout
|
---|
1787 |
|
---|
1788 | \end_inset
|
---|
1789 | </cell>
|
---|
1790 | </row>
|
---|
1791 | <row bottomline="true">
|
---|
1792 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1793 | \begin_inset Text
|
---|
1794 |
|
---|
1795 | \begin_layout Standard
|
---|
1796 | ibdat
|
---|
1797 | \end_layout
|
---|
1798 |
|
---|
1799 | \end_inset
|
---|
1800 | </cell>
|
---|
1801 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1802 | \begin_inset Text
|
---|
1803 |
|
---|
1804 | \begin_layout Standard
|
---|
1805 | two dimensional array of int
|
---|
1806 | \end_layout
|
---|
1807 |
|
---|
1808 | \end_inset
|
---|
1809 | </cell>
|
---|
1810 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1811 | \begin_inset Text
|
---|
1812 |
|
---|
1813 | \begin_layout Standard
|
---|
1814 | Indices of successor atoms
|
---|
1815 | \end_layout
|
---|
1816 |
|
---|
1817 | \end_inset
|
---|
1818 | </cell>
|
---|
1819 | </row>
|
---|
1820 | </lyxtabular>
|
---|
1821 |
|
---|
1822 | \end_inset
|
---|
1823 |
|
---|
1824 |
|
---|
1825 | \end_layout
|
---|
1826 |
|
---|
1827 | \begin_layout Standard
|
---|
1828 | \begin_inset Caption
|
---|
1829 |
|
---|
1830 | \begin_layout Standard
|
---|
1831 | \begin_inset LatexCommand label
|
---|
1832 | name "tab:atomic-properties"
|
---|
1833 |
|
---|
1834 | \end_inset
|
---|
1835 |
|
---|
1836 | List of variables storing atomic properties.
|
---|
1837 | All the properties of atom
|
---|
1838 | \begin_inset Formula $i$
|
---|
1839 | \end_inset
|
---|
1840 |
|
---|
1841 | are accessed as the
|
---|
1842 | \begin_inset Formula $i$
|
---|
1843 | \end_inset
|
---|
1844 |
|
---|
1845 | th element of the arrays.
|
---|
1846 | \end_layout
|
---|
1847 |
|
---|
1848 | \end_inset
|
---|
1849 |
|
---|
1850 |
|
---|
1851 | \end_layout
|
---|
1852 |
|
---|
1853 | \end_inset
|
---|
1854 |
|
---|
1855 |
|
---|
1856 | \begin_inset Float table
|
---|
1857 | placement p
|
---|
1858 | wide false
|
---|
1859 | sideways false
|
---|
1860 | status collapsed
|
---|
1861 |
|
---|
1862 | \begin_layout Standard
|
---|
1863 | \begin_inset Tabular
|
---|
1864 | <lyxtabular version="3" rows="8" columns="3">
|
---|
1865 | <features>
|
---|
1866 | <column alignment="center" valignment="top" leftline="true" width="0">
|
---|
1867 | <column alignment="center" valignment="top" leftline="true" width="0">
|
---|
1868 | <column alignment="center" valignment="top" leftline="true" rightline="true" width="35col%">
|
---|
1869 | <row topline="true" bottomline="true">
|
---|
1870 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1871 | \begin_inset Text
|
---|
1872 |
|
---|
1873 | \begin_layout Standard
|
---|
1874 | Name
|
---|
1875 | \end_layout
|
---|
1876 |
|
---|
1877 | \end_inset
|
---|
1878 | </cell>
|
---|
1879 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1880 | \begin_inset Text
|
---|
1881 |
|
---|
1882 | \begin_layout Standard
|
---|
1883 | Type
|
---|
1884 | \end_layout
|
---|
1885 |
|
---|
1886 | \end_inset
|
---|
1887 | </cell>
|
---|
1888 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1889 | \begin_inset Text
|
---|
1890 |
|
---|
1891 | \begin_layout Standard
|
---|
1892 | Description
|
---|
1893 | \end_layout
|
---|
1894 |
|
---|
1895 | \end_inset
|
---|
1896 | </cell>
|
---|
1897 | </row>
|
---|
1898 | <row topline="true">
|
---|
1899 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1900 | \begin_inset Text
|
---|
1901 |
|
---|
1902 | \begin_layout Standard
|
---|
1903 | xbaat, ybaat, zbaat
|
---|
1904 | \end_layout
|
---|
1905 |
|
---|
1906 | \end_inset
|
---|
1907 | </cell>
|
---|
1908 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1909 | \begin_inset Text
|
---|
1910 |
|
---|
1911 | \begin_layout Standard
|
---|
1912 | 3 arrays of double
|
---|
1913 | \end_layout
|
---|
1914 |
|
---|
1915 | \end_inset
|
---|
1916 | </cell>
|
---|
1917 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1918 | \begin_inset Text
|
---|
1919 |
|
---|
1920 | \begin_layout Standard
|
---|
1921 | Rotation axis for valence angle.
|
---|
1922 | (see Fig.
|
---|
1923 | )
|
---|
1924 | \end_layout
|
---|
1925 |
|
---|
1926 | \end_inset
|
---|
1927 | </cell>
|
---|
1928 | </row>
|
---|
1929 | <row topline="true">
|
---|
1930 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1931 | \begin_inset Text
|
---|
1932 |
|
---|
1933 | \begin_layout Standard
|
---|
1934 | baat
|
---|
1935 | \end_layout
|
---|
1936 |
|
---|
1937 | \end_inset
|
---|
1938 | </cell>
|
---|
1939 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1940 | \begin_inset Text
|
---|
1941 |
|
---|
1942 | \begin_layout Standard
|
---|
1943 | array of double
|
---|
1944 | \end_layout
|
---|
1945 |
|
---|
1946 | \end_inset
|
---|
1947 | </cell>
|
---|
1948 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1949 | \begin_inset Text
|
---|
1950 |
|
---|
1951 | \begin_layout Standard
|
---|
1952 | Valence angle in radians
|
---|
1953 | \end_layout
|
---|
1954 |
|
---|
1955 | \end_inset
|
---|
1956 | </cell>
|
---|
1957 | </row>
|
---|
1958 | <row topline="true">
|
---|
1959 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1960 | \begin_inset Text
|
---|
1961 |
|
---|
1962 | \begin_layout Standard
|
---|
1963 | xtoat, ytoat, ztoat
|
---|
1964 | \end_layout
|
---|
1965 |
|
---|
1966 | \end_inset
|
---|
1967 | </cell>
|
---|
1968 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1969 | \begin_inset Text
|
---|
1970 |
|
---|
1971 | \begin_layout Standard
|
---|
1972 | 3 arrays of double
|
---|
1973 | \end_layout
|
---|
1974 |
|
---|
1975 | \end_inset
|
---|
1976 | </cell>
|
---|
1977 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
1978 | \begin_inset Text
|
---|
1979 |
|
---|
1980 | \begin_layout Standard
|
---|
1981 | Rotation axis for dihedral (torsion) angle.
|
---|
1982 | (see Fig.)
|
---|
1983 | \end_layout
|
---|
1984 |
|
---|
1985 | \end_inset
|
---|
1986 | </cell>
|
---|
1987 | </row>
|
---|
1988 | <row topline="true">
|
---|
1989 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1990 | \begin_inset Text
|
---|
1991 |
|
---|
1992 | \begin_layout Standard
|
---|
1993 | toat
|
---|
1994 | \end_layout
|
---|
1995 |
|
---|
1996 | \end_inset
|
---|
1997 | </cell>
|
---|
1998 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
1999 | \begin_inset Text
|
---|
2000 |
|
---|
2001 | \begin_layout Standard
|
---|
2002 | array of double
|
---|
2003 | \end_layout
|
---|
2004 |
|
---|
2005 | \end_inset
|
---|
2006 | </cell>
|
---|
2007 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
2008 | \begin_inset Text
|
---|
2009 |
|
---|
2010 | \begin_layout Standard
|
---|
2011 | Torsion angle defined by iowat(iowat(iowat(i))), iowat(iowat(i)), iowat(i),
|
---|
2012 | i in radians (see Fig.)
|
---|
2013 | \end_layout
|
---|
2014 |
|
---|
2015 | \end_inset
|
---|
2016 | </cell>
|
---|
2017 | </row>
|
---|
2018 | <row topline="true">
|
---|
2019 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
2020 | \begin_inset Text
|
---|
2021 |
|
---|
2022 | \begin_layout Standard
|
---|
2023 | blat
|
---|
2024 | \end_layout
|
---|
2025 |
|
---|
2026 | \end_inset
|
---|
2027 | </cell>
|
---|
2028 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
2029 | \begin_inset Text
|
---|
2030 |
|
---|
2031 | \begin_layout Standard
|
---|
2032 | array of double
|
---|
2033 | \end_layout
|
---|
2034 |
|
---|
2035 | \end_inset
|
---|
2036 | </cell>
|
---|
2037 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
2038 | \begin_inset Text
|
---|
2039 |
|
---|
2040 | \begin_layout Standard
|
---|
2041 | Length of bond.
|
---|
2042 | \end_layout
|
---|
2043 |
|
---|
2044 | \end_inset
|
---|
2045 | </cell>
|
---|
2046 | </row>
|
---|
2047 | <row topline="true">
|
---|
2048 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
2049 | \begin_inset Text
|
---|
2050 |
|
---|
2051 | \begin_layout Standard
|
---|
2052 | ixmsat
|
---|
2053 | \end_layout
|
---|
2054 |
|
---|
2055 | \end_inset
|
---|
2056 | </cell>
|
---|
2057 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
2058 | \begin_inset Text
|
---|
2059 |
|
---|
2060 | \begin_layout Standard
|
---|
2061 | array of int
|
---|
2062 | \end_layout
|
---|
2063 |
|
---|
2064 | \end_inset
|
---|
2065 | </cell>
|
---|
2066 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
2067 | \begin_inset Text
|
---|
2068 |
|
---|
2069 | \begin_layout Standard
|
---|
2070 | Index of moving set belonging to atom
|
---|
2071 | \end_layout
|
---|
2072 |
|
---|
2073 | \end_inset
|
---|
2074 | </cell>
|
---|
2075 | </row>
|
---|
2076 | <row topline="true" bottomline="true">
|
---|
2077 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
2078 | \begin_inset Text
|
---|
2079 |
|
---|
2080 | \begin_layout Standard
|
---|
2081 |
|
---|
2082 | \end_layout
|
---|
2083 |
|
---|
2084 | \end_inset
|
---|
2085 | </cell>
|
---|
2086 | <cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
---|
2087 | \begin_inset Text
|
---|
2088 |
|
---|
2089 | \begin_layout Standard
|
---|
2090 |
|
---|
2091 | \end_layout
|
---|
2092 |
|
---|
2093 | \end_inset
|
---|
2094 | </cell>
|
---|
2095 | <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
---|
2096 | \begin_inset Text
|
---|
2097 |
|
---|
2098 | \begin_layout Standard
|
---|
2099 |
|
---|
2100 | \end_layout
|
---|
2101 |
|
---|
2102 | \end_inset
|
---|
2103 | </cell>
|
---|
2104 | </row>
|
---|
2105 | </lyxtabular>
|
---|
2106 |
|
---|
2107 | \end_inset
|
---|
2108 |
|
---|
2109 |
|
---|
2110 | \end_layout
|
---|
2111 |
|
---|
2112 | \begin_layout Standard
|
---|
2113 | \begin_inset Caption
|
---|
2114 |
|
---|
2115 | \begin_layout Standard
|
---|
2116 | \begin_inset LatexCommand label
|
---|
2117 | name "tab:dihedral-to-atom"
|
---|
2118 |
|
---|
2119 | \end_inset
|
---|
2120 |
|
---|
2121 | Each dihedral and valence angle and the corresponding moving set is associated
|
---|
2122 | with a covalent bond which in turn is defined by its tail atom.
|
---|
2123 | This table list the related variables.
|
---|
2124 |
|
---|
2125 | \end_layout
|
---|
2126 |
|
---|
2127 | \end_inset
|
---|
2128 |
|
---|
2129 |
|
---|
2130 | \end_layout
|
---|
2131 |
|
---|
2132 | \end_inset
|
---|
2133 |
|
---|
2134 |
|
---|
2135 | \begin_inset Float figure
|
---|
2136 | wide false
|
---|
2137 | sideways false
|
---|
2138 | status collapsed
|
---|
2139 |
|
---|
2140 | \begin_layout Standard
|
---|
2141 | \align center
|
---|
2142 | \begin_inset Graphics
|
---|
2143 | filename angle_defs.eps
|
---|
2144 | scaleBeforeRotation
|
---|
2145 | subcaption
|
---|
2146 |
|
---|
2147 | \end_inset
|
---|
2148 |
|
---|
2149 |
|
---|
2150 | \begin_inset Graphics
|
---|
2151 | filename dihedral_defs.eps
|
---|
2152 | scaleBeforeRotation
|
---|
2153 | subcaption
|
---|
2154 |
|
---|
2155 | \end_inset
|
---|
2156 |
|
---|
2157 |
|
---|
2158 | \end_layout
|
---|
2159 |
|
---|
2160 | \begin_layout Standard
|
---|
2161 | \begin_inset Caption
|
---|
2162 |
|
---|
2163 | \begin_layout Standard
|
---|
2164 | \begin_inset LatexCommand label
|
---|
2165 | name "fig:angle-defs-in-SMMP"
|
---|
2166 |
|
---|
2167 | \end_inset
|
---|
2168 |
|
---|
2169 | Angle in SMMP.
|
---|
2170 | There are two different types of angles in SMMP (and proteins in general):
|
---|
2171 | bond and torsional angles.
|
---|
2172 | The bond or valence angle is show in (a).
|
---|
2173 | The red arrow indicates the rotation axis and is proportional to the cross
|
---|
2174 | product of the two bonds
|
---|
2175 | \begin_inset Formula $(1,4)$
|
---|
2176 | \end_inset
|
---|
2177 |
|
---|
2178 | and
|
---|
2179 | \begin_inset Formula $(4,25)$
|
---|
2180 | \end_inset
|
---|
2181 |
|
---|
2182 | making up the angle.
|
---|
2183 | The angle
|
---|
2184 | \begin_inset Formula $\alpha$
|
---|
2185 | \end_inset
|
---|
2186 |
|
---|
2187 | is associated with atom
|
---|
2188 | \begin_inset Formula $4$
|
---|
2189 | \end_inset
|
---|
2190 |
|
---|
2191 | .
|
---|
2192 | The dihedral or torsional angles are rotations around a bond and determined
|
---|
2193 | by the angles between the two adjacent planes.
|
---|
2194 | For example, the angle
|
---|
2195 | \begin_inset Formula $\psi$
|
---|
2196 | \end_inset
|
---|
2197 |
|
---|
2198 | in (b) is the angle between the plane defined by atoms 1, 4, and 25, and
|
---|
2199 | the plane defined by 4, 25, and 28.
|
---|
2200 | We could therefore reference this angle using the quadruplet (1, 4, 25,
|
---|
2201 | 28).
|
---|
2202 | Note that atom 1 is the predecessor of atom 4, atom 4 the predecessor of
|
---|
2203 | 25, and, finally, atom 25 the predecessor of 28.
|
---|
2204 | SMMP uses this relation to associate the angle
|
---|
2205 | \begin_inset Formula $\psi$
|
---|
2206 | \end_inset
|
---|
2207 |
|
---|
2208 | with atom 28.
|
---|
2209 | \end_layout
|
---|
2210 |
|
---|
2211 | \end_inset
|
---|
2212 |
|
---|
2213 |
|
---|
2214 | \end_layout
|
---|
2215 |
|
---|
2216 | \end_inset
|
---|
2217 |
|
---|
2218 |
|
---|
2219 | \end_layout
|
---|
2220 |
|
---|
2221 | \begin_layout Standard
|
---|
2222 | Table
|
---|
2223 | \begin_inset LatexCommand ref
|
---|
2224 | reference "tab:atomic-properties"
|
---|
2225 |
|
---|
2226 | \end_inset
|
---|
2227 |
|
---|
2228 | lists the arrays containing the atomic properties such as charge, position,
|
---|
2229 | and in- and outgoing bonds.
|
---|
2230 | In the standard geometry configurations can defined by the dihedral angles.
|
---|
2231 | The variables associated with the angles are given in Table
|
---|
2232 | \begin_inset LatexCommand ref
|
---|
2233 | reference "tab:dihedral-to-atom"
|
---|
2234 |
|
---|
2235 | \end_inset
|
---|
2236 |
|
---|
2237 | and a description of the angles can be found in Fig.\InsetSpace ~
|
---|
2238 |
|
---|
2239 | \begin_inset LatexCommand ref
|
---|
2240 | reference "fig:angle-defs-in-SMMP"
|
---|
2241 |
|
---|
2242 | \end_inset
|
---|
2243 |
|
---|
2244 | .
|
---|
2245 | \end_layout
|
---|
2246 |
|
---|
2247 | \begin_layout Paragraph
|
---|
2248 | \begin_inset Note Note
|
---|
2249 | status open
|
---|
2250 |
|
---|
2251 | \begin_layout Standard
|
---|
2252 | Why are the names so short and what do they mean?
|
---|
2253 | \end_layout
|
---|
2254 |
|
---|
2255 | \begin_layout Paragraph
|
---|
2256 | Setting up a force field
|
---|
2257 | \end_layout
|
---|
2258 |
|
---|
2259 | \begin_layout Paragraph
|
---|
2260 | Loading a molecule from a .seq and .var file
|
---|
2261 | \end_layout
|
---|
2262 |
|
---|
2263 | \begin_layout Standard
|
---|
2264 | fixed variables, default values, access?
|
---|
2265 | \end_layout
|
---|
2266 |
|
---|
2267 | \begin_layout Paragraph
|
---|
2268 | Loading a molecule from a PDB file
|
---|
2269 | \end_layout
|
---|
2270 |
|
---|
2271 | \begin_layout Standard
|
---|
2272 | where are things stored? what does regularization do?
|
---|
2273 | \end_layout
|
---|
2274 |
|
---|
2275 | \end_inset
|
---|
2276 |
|
---|
2277 |
|
---|
2278 | \end_layout
|
---|
2279 |
|
---|
2280 | \begin_layout Section
|
---|
2281 | Limitations
|
---|
2282 | \end_layout
|
---|
2283 |
|
---|
2284 | \begin_layout Standard
|
---|
2285 | All parameters which limit the usage of SMMP are stored in the file INCL.H.
|
---|
2286 | The most important ones are listed below.
|
---|
2287 | The values of these parameters should be changed only in a consistent way!
|
---|
2288 |
|
---|
2289 | \begin_inset ERT
|
---|
2290 | status collapsed
|
---|
2291 |
|
---|
2292 | \begin_layout Standard
|
---|
2293 |
|
---|
2294 |
|
---|
2295 | \backslash
|
---|
2296 | begin{verbatim}
|
---|
2297 | \end_layout
|
---|
2298 |
|
---|
2299 | \begin_layout Standard
|
---|
2300 |
|
---|
2301 | \end_layout
|
---|
2302 |
|
---|
2303 | \begin_layout Standard
|
---|
2304 |
|
---|
2305 | mxml=1 max.
|
---|
2306 | number of molecules
|
---|
2307 | \end_layout
|
---|
2308 |
|
---|
2309 | \begin_layout Standard
|
---|
2310 |
|
---|
2311 | \end_layout
|
---|
2312 |
|
---|
2313 | \begin_layout Standard
|
---|
2314 |
|
---|
2315 | mxrs=100 max.
|
---|
2316 | total number of residues
|
---|
2317 | \end_layout
|
---|
2318 |
|
---|
2319 | \begin_layout Standard
|
---|
2320 |
|
---|
2321 | \end_layout
|
---|
2322 |
|
---|
2323 | \begin_layout Standard
|
---|
2324 |
|
---|
2325 | mxat=2000 max.
|
---|
2326 | total number of atoms
|
---|
2327 | \end_layout
|
---|
2328 |
|
---|
2329 | \begin_layout Standard
|
---|
2330 |
|
---|
2331 | \end_layout
|
---|
2332 |
|
---|
2333 | \begin_layout Standard
|
---|
2334 |
|
---|
2335 | mxbd=3 max.
|
---|
2336 | number of bonds to following atoms
|
---|
2337 | \end_layout
|
---|
2338 |
|
---|
2339 | \begin_layout Standard
|
---|
2340 |
|
---|
2341 | \end_layout
|
---|
2342 |
|
---|
2343 | \begin_layout Standard
|
---|
2344 |
|
---|
2345 | mxvr=mxrs*5 max.
|
---|
2346 | number of local variables
|
---|
2347 | \end_layout
|
---|
2348 |
|
---|
2349 | \begin_layout Standard
|
---|
2350 |
|
---|
2351 | \end_layout
|
---|
2352 |
|
---|
2353 | \begin_layout Standard
|
---|
2354 |
|
---|
2355 | mxms=mxvr*3 max.
|
---|
2356 | total number of moving sets
|
---|
2357 | \end_layout
|
---|
2358 |
|
---|
2359 | \begin_layout Standard
|
---|
2360 |
|
---|
2361 | \end_layout
|
---|
2362 |
|
---|
2363 | \begin_layout Standard
|
---|
2364 |
|
---|
2365 | mxvw=mxat*4 max.
|
---|
2366 | number of vdw domains
|
---|
2367 | \end_layout
|
---|
2368 |
|
---|
2369 | \begin_layout Standard
|
---|
2370 |
|
---|
2371 | \end_layout
|
---|
2372 |
|
---|
2373 | \begin_layout Standard
|
---|
2374 |
|
---|
2375 | mx14=mxat*4 max.
|
---|
2376 | number of '1-4' partners
|
---|
2377 | \end_layout
|
---|
2378 |
|
---|
2379 | \begin_layout Standard
|
---|
2380 |
|
---|
2381 | \end_layout
|
---|
2382 |
|
---|
2383 | \begin_layout Standard
|
---|
2384 |
|
---|
2385 | mxath=100, max.
|
---|
2386 | number of atoms in help-arrays
|
---|
2387 | \end_layout
|
---|
2388 |
|
---|
2389 | \begin_layout Standard
|
---|
2390 |
|
---|
2391 | \end_layout
|
---|
2392 |
|
---|
2393 | \begin_layout Standard
|
---|
2394 |
|
---|
2395 | mxvrh=mxath max.
|
---|
2396 | number of variables in help
|
---|
2397 | \end_layout
|
---|
2398 |
|
---|
2399 | \begin_layout Standard
|
---|
2400 |
|
---|
2401 | \end_layout
|
---|
2402 |
|
---|
2403 | \begin_layout Standard
|
---|
2404 |
|
---|
2405 | mxtyat=18 max.
|
---|
2406 | number of energetic atom-types
|
---|
2407 | \end_layout
|
---|
2408 |
|
---|
2409 | \begin_layout Standard
|
---|
2410 |
|
---|
2411 | \end_layout
|
---|
2412 |
|
---|
2413 | \begin_layout Standard
|
---|
2414 |
|
---|
2415 | mxhbdo=4 max.
|
---|
2416 | types of Hydrogens as donors in HB
|
---|
2417 | \end_layout
|
---|
2418 |
|
---|
2419 | \begin_layout Standard
|
---|
2420 |
|
---|
2421 | \end_layout
|
---|
2422 |
|
---|
2423 | \begin_layout Standard
|
---|
2424 |
|
---|
2425 | mxhbac=6 max.
|
---|
2426 | types of atoms as acceptors in HB
|
---|
2427 | \end_layout
|
---|
2428 |
|
---|
2429 | \begin_layout Standard
|
---|
2430 |
|
---|
2431 | \end_layout
|
---|
2432 |
|
---|
2433 | \begin_layout Standard
|
---|
2434 |
|
---|
2435 | mxtyto=19 max.
|
---|
2436 | number of types of torsional potentials
|
---|
2437 | \end_layout
|
---|
2438 |
|
---|
2439 | \begin_layout Standard
|
---|
2440 |
|
---|
2441 | \end_layout
|
---|
2442 |
|
---|
2443 | \begin_layout Standard
|
---|
2444 |
|
---|
2445 | nrsty=35 max.
|
---|
2446 | number of residue types
|
---|
2447 | \end_layout
|
---|
2448 |
|
---|
2449 | \begin_layout Standard
|
---|
2450 |
|
---|
2451 | \end_layout
|
---|
2452 |
|
---|
2453 | \begin_layout Standard
|
---|
2454 |
|
---|
2455 | mxtysol=9 the number of solvation parameters sets
|
---|
2456 | \end_layout
|
---|
2457 |
|
---|
2458 | \begin_layout Standard
|
---|
2459 |
|
---|
2460 | \end_layout
|
---|
2461 |
|
---|
2462 | \begin_layout Standard
|
---|
2463 |
|
---|
2464 |
|
---|
2465 | \backslash
|
---|
2466 | end{verbatim}
|
---|
2467 | \end_layout
|
---|
2468 |
|
---|
2469 | \end_inset
|
---|
2470 |
|
---|
2471 |
|
---|
2472 | \end_layout
|
---|
2473 |
|
---|
2474 | \begin_layout Standard
|
---|
2475 | \noindent
|
---|
2476 | Note also the following restrictions in the current version of SMMP:
|
---|
2477 | \end_layout
|
---|
2478 |
|
---|
2479 | \begin_layout Enumerate
|
---|
2480 | A single amino acid residue can not be simulated with the FLEX potential
|
---|
2481 | \end_layout
|
---|
2482 |
|
---|
2483 | \begin_layout Enumerate
|
---|
2484 | A protein must not start with a prolyl residue.
|
---|
2485 |
|
---|
2486 | \end_layout
|
---|
2487 |
|
---|
2488 | \begin_layout Section
|
---|
2489 | Libraries and Parameter Files
|
---|
2490 | \end_layout
|
---|
2491 |
|
---|
2492 | \begin_layout Standard
|
---|
2493 | The residues which can be used with each parameter set are described in
|
---|
2494 | files
|
---|
2495 | \shape italic
|
---|
2496 | lib.sh2, lib.sh3
|
---|
2497 | \shape default
|
---|
2498 | , and
|
---|
2499 | \shape italic
|
---|
2500 | lib.flex
|
---|
2501 | \shape default
|
---|
2502 | , respectively.
|
---|
2503 | The file
|
---|
2504 | \shape italic
|
---|
2505 | charges
|
---|
2506 | \shape default
|
---|
2507 | is needed for N- and C-terminal residues with FLEX parameters.
|
---|
2508 | The name of the directory, containing these 4 files should be given in
|
---|
2509 | string 'libdir', which is assigned in module MAIN.
|
---|
2510 | The choice between parameter sets for potentials ECEPP/2 and ECEPP/3 is
|
---|
2511 | done by the logical variable '
|
---|
2512 | \shape italic
|
---|
2513 | sh2
|
---|
2514 | \shape default
|
---|
2515 | '.
|
---|
2516 | The potential FLEX is set by the logical variable '
|
---|
2517 | \shape italic
|
---|
2518 | flex
|
---|
2519 | \shape default
|
---|
2520 | '.
|
---|
2521 | \end_layout
|
---|
2522 |
|
---|
2523 | \begin_layout Standard
|
---|
2524 | The amino acid residue libraries contain chemical and structural data for
|
---|
2525 | each residue according the IUPAC-IUB nomenclature.
|
---|
2526 | The library files consist of blocks of records with each block representing
|
---|
2527 | one residue.
|
---|
2528 | The first line in each block starts with a '#' and contains the name of
|
---|
2529 | the residue and its total number of atoms.
|
---|
2530 | Each following line within the block describes one atom.
|
---|
2531 | Listed are: its name, the bond length and the valence angle to construct
|
---|
2532 | this atom, the type and the name of corresponding torsion angle, the partial
|
---|
2533 | charge for the atom, the type of the atom, as well as the previous and
|
---|
2534 | the following atoms (max.
|
---|
2535 | 3), it is connected to.
|
---|
2536 | The atom and torsional parameters in the libraries are the same as in the
|
---|
2537 | original ECEPP/2/3 and FLEX potentials.
|
---|
2538 | However, it should be noted that SMMP has its own numeration of the atom
|
---|
2539 | types and the types of torsions (see
|
---|
2540 | \begin_inset LatexCommand cite
|
---|
2541 | key "Eisenmenger2001,Eisenmenger2006"
|
---|
2542 |
|
---|
2543 | \end_inset
|
---|
2544 |
|
---|
2545 | for more details).
|
---|
2546 | \end_layout
|
---|
2547 |
|
---|
2548 | \begin_layout Standard
|
---|
2549 | The arrays with the parameters for non bonded pairwise potentials (Van der
|
---|
2550 | Waals, hydrogen bonds, electrostatic) and the atomic solvation parameters
|
---|
2551 | are stored in the BLOCK DATA section of '
|
---|
2552 | \shape italic
|
---|
2553 | init_energy.f
|
---|
2554 | \shape default
|
---|
2555 | '.
|
---|
2556 | \end_layout
|
---|
2557 |
|
---|
2558 | \begin_layout Standard
|
---|
2559 | SMMP employs 9 different sets of atomic solvation parameters.
|
---|
2560 | We do not include references to the original works where these sets are
|
---|
2561 | defined in this document, since this manual is only a supplement to our
|
---|
2562 | articles
|
---|
2563 | \begin_inset LatexCommand cite
|
---|
2564 | key "Eisenmenger2001,Eisenmenger2006"
|
---|
2565 |
|
---|
2566 | \end_inset
|
---|
2567 |
|
---|
2568 | where all relevant references can be found.
|
---|
2569 | The set of solvation parameters chosen is indicated by the value of integer
|
---|
2570 | variable '
|
---|
2571 | \shape italic
|
---|
2572 | itysol
|
---|
2573 | \shape default
|
---|
2574 | ' in the MAIN module.
|
---|
2575 | If setting
|
---|
2576 | \shape italic
|
---|
2577 | itysol
|
---|
2578 | \shape default
|
---|
2579 | to a positive value between
|
---|
2580 | \shape italic
|
---|
2581 | 1
|
---|
2582 | \shape default
|
---|
2583 | and
|
---|
2584 | \shape italic
|
---|
2585 | 9
|
---|
2586 | \shape default
|
---|
2587 | in MAIN, the numerical method
|
---|
2588 | \shape italic
|
---|
2589 | enysol
|
---|
2590 | \shape default
|
---|
2591 | is applied to compute the solvation energy term.
|
---|
2592 | By choosing a negative integer value for
|
---|
2593 | \shape italic
|
---|
2594 | itysol
|
---|
2595 | \shape default
|
---|
2596 | from the interval
|
---|
2597 | \shape italic
|
---|
2598 | [-1,-9]
|
---|
2599 | \shape default
|
---|
2600 | , the analytical method
|
---|
2601 | \shape italic
|
---|
2602 | esolan
|
---|
2603 | \shape default
|
---|
2604 | is used to calculate the solvation energy.
|
---|
2605 | The tesselation points for numerically calculating the solvent accessible
|
---|
2606 | surface area have to be provided in an external file (named
|
---|
2607 | \shape italic
|
---|
2608 | tes.dat
|
---|
2609 | \shape default
|
---|
2610 | in our package) and read in during initialization of solvation parameters
|
---|
2611 | in
|
---|
2612 | \shape italic
|
---|
2613 | init_energy.f
|
---|
2614 | \shape default
|
---|
2615 | .
|
---|
2616 | \end_layout
|
---|
2617 |
|
---|
2618 | \begin_layout Section
|
---|
2619 | Input Files
|
---|
2620 | \end_layout
|
---|
2621 |
|
---|
2622 | \begin_layout Standard
|
---|
2623 | SMMP requires an input file that specifies the sequence of amino acid residues
|
---|
2624 | of the protein in plain ASCII-format.
|
---|
2625 |
|
---|
2626 | \end_layout
|
---|
2627 |
|
---|
2628 | \begin_layout Subsection
|
---|
2629 | PDB-File
|
---|
2630 | \begin_inset LatexCommand label
|
---|
2631 | name "sub:PDB-File"
|
---|
2632 |
|
---|
2633 | \end_inset
|
---|
2634 |
|
---|
2635 |
|
---|
2636 | \end_layout
|
---|
2637 |
|
---|
2638 | \begin_layout Standard
|
---|
2639 | Setting the variable '
|
---|
2640 | \shape italic
|
---|
2641 | iabin = 0
|
---|
2642 | \shape default
|
---|
2643 | ' in
|
---|
2644 | \shape italic
|
---|
2645 | main.f
|
---|
2646 | \shape default
|
---|
2647 | the sequence of amino acids is read from a PDB-file - the standard format
|
---|
2648 | in which protein structures are deposited in the Protein Data Bank.
|
---|
2649 | The atomic coordinates are also read from the PDB-file and can serve as
|
---|
2650 | a start configuration.
|
---|
2651 | However, the fixed bond lengths and angles in the standard geometry will
|
---|
2652 | slightly differ from the actual bond lengths and angles in the PDB-structure.
|
---|
2653 | Forcing the molecule into standard bonding geometry corresponding to a
|
---|
2654 | given potential may lead to un-physically high energies.
|
---|
2655 | Regularization through
|
---|
2656 | \shape italic
|
---|
2657 | regul.f
|
---|
2658 | \shape default
|
---|
2659 | allows to obtain an optimized structure with standard bonding geometry
|
---|
2660 | with low internal energy without differing significantly from the PDB structure.
|
---|
2661 |
|
---|
2662 | \end_layout
|
---|
2663 |
|
---|
2664 | \begin_layout Subsection
|
---|
2665 | Sequence File
|
---|
2666 | \begin_inset LatexCommand label
|
---|
2667 | name "sub:Sequence-File"
|
---|
2668 |
|
---|
2669 | \end_inset
|
---|
2670 |
|
---|
2671 |
|
---|
2672 | \end_layout
|
---|
2673 |
|
---|
2674 | \begin_layout Standard
|
---|
2675 | Setting `
|
---|
2676 | \shape italic
|
---|
2677 | iabin = 1
|
---|
2678 | \shape default
|
---|
2679 | ' the amino acid sequence is read from a separate sequence file.
|
---|
2680 | Its first line must start with a '#' and may contain the name for the molecule.
|
---|
2681 | The residues in the following lines should be named as in the library files
|
---|
2682 |
|
---|
2683 | \shape italic
|
---|
2684 | lib.sh2, lib.sh3
|
---|
2685 | \shape default
|
---|
2686 | , or
|
---|
2687 | \shape italic
|
---|
2688 | lib.flex
|
---|
2689 | \shape default
|
---|
2690 | .
|
---|
2691 | Residue names are not case-sensitive and should be separated from each
|
---|
2692 | other by at least one white space.
|
---|
2693 | \end_layout
|
---|
2694 |
|
---|
2695 | \begin_layout Standard
|
---|
2696 | Currently, the following residue types can be used in SMMP:
|
---|
2697 | \end_layout
|
---|
2698 |
|
---|
2699 | \begin_layout Enumerate
|
---|
2700 | Neutral:
|
---|
2701 | \newline
|
---|
2702 | ala, arg, asn, asp, cys, gln, glu, gly, his* ; hise* ; hyp*, ile,
|
---|
2703 | leu, lys, met, phe, pro* , ser, thr, trp, tyr, val
|
---|
2704 | \newline
|
---|
2705 | (where the residues
|
---|
2706 | marked by an asterix are characterized by:
|
---|
2707 | \newline
|
---|
2708 | his - hydrogen at N-delta atom
|
---|
2709 | \newline
|
---|
2710 |
|
---|
2711 | hise - hydrogen at N-epsilon atom
|
---|
2712 | \newline
|
---|
2713 | pro, hyp - down-puckering)
|
---|
2714 | \end_layout
|
---|
2715 |
|
---|
2716 | \begin_layout Enumerate
|
---|
2717 | Charged:
|
---|
2718 | \newline
|
---|
2719 | arg+, asp-, glu-, his+, lys+.
|
---|
2720 |
|
---|
2721 | \end_layout
|
---|
2722 |
|
---|
2723 | \begin_layout Enumerate
|
---|
2724 | Variants, only with ECEPP/3 parameters:
|
---|
2725 | \newline
|
---|
2726 | hypu, prou - up-puckering
|
---|
2727 | \newline
|
---|
2728 | cpro,
|
---|
2729 | cpru - cis-Pro with down-, up-puckering
|
---|
2730 | \newline
|
---|
2731 | pron, pro+ - N-terminal neutral,
|
---|
2732 | charged with respect to NH2+ Pro
|
---|
2733 | \end_layout
|
---|
2734 |
|
---|
2735 | \begin_layout Standard
|
---|
2736 | End-groups need to be specified in
|
---|
2737 | \shape italic
|
---|
2738 | main.f
|
---|
2739 | \shape default
|
---|
2740 | and are added through subroutine
|
---|
2741 | \shape italic
|
---|
2742 | addend
|
---|
2743 | \shape default
|
---|
2744 | to the N- and C-terminus, correspondingly.
|
---|
2745 | Possible values for the end groups are nh2 and nh3+ for the N terminal
|
---|
2746 | and cooh and coo- for the C terminal.
|
---|
2747 | Note, that the acetyl group ('
|
---|
2748 | \shape italic
|
---|
2749 | ace
|
---|
2750 | \shape default
|
---|
2751 | ') and N'methylamide ('
|
---|
2752 | \shape italic
|
---|
2753 | nme
|
---|
2754 | \shape default
|
---|
2755 | ') need to be added as
|
---|
2756 | \shape italic
|
---|
2757 | residues
|
---|
2758 | \shape default
|
---|
2759 | in the sequence file.
|
---|
2760 | In that case, input into '
|
---|
2761 | \shape italic
|
---|
2762 | addend
|
---|
2763 | \shape default
|
---|
2764 | ' will be ignored by SMMP.
|
---|
2765 | Note also, that at present, molecules with only one single residue cannot
|
---|
2766 | be simulated with the FLEX data set and the first residue should not be
|
---|
2767 | a prolyl residue.
|
---|
2768 | \end_layout
|
---|
2769 |
|
---|
2770 | \begin_layout Standard
|
---|
2771 | An example sequence file (provided with SMMP) may look as follows:
|
---|
2772 | \begin_inset ERT
|
---|
2773 | status collapsed
|
---|
2774 |
|
---|
2775 | \begin_layout Standard
|
---|
2776 |
|
---|
2777 |
|
---|
2778 | \backslash
|
---|
2779 | begin{verbatim}
|
---|
2780 | \end_layout
|
---|
2781 |
|
---|
2782 | \begin_layout Standard
|
---|
2783 |
|
---|
2784 | ------------------- enkefa.seq --------------------------
|
---|
2785 | \end_layout
|
---|
2786 |
|
---|
2787 | \begin_layout Standard
|
---|
2788 |
|
---|
2789 | # Met-Enkephalin
|
---|
2790 | \end_layout
|
---|
2791 |
|
---|
2792 | \begin_layout Standard
|
---|
2793 |
|
---|
2794 | Tyr Gly Gly Phe Met
|
---|
2795 | \end_layout
|
---|
2796 |
|
---|
2797 | \begin_layout Standard
|
---|
2798 |
|
---|
2799 | ---------------------------------------------------------
|
---|
2800 | \end_layout
|
---|
2801 |
|
---|
2802 | \begin_layout Standard
|
---|
2803 |
|
---|
2804 |
|
---|
2805 | \backslash
|
---|
2806 | end{verbatim}
|
---|
2807 | \end_layout
|
---|
2808 |
|
---|
2809 | \end_inset
|
---|
2810 |
|
---|
2811 |
|
---|
2812 | \end_layout
|
---|
2813 |
|
---|
2814 | \begin_layout Subsection
|
---|
2815 | Configuration File (Dihedrals)
|
---|
2816 | \begin_inset LatexCommand label
|
---|
2817 | name "sub:Configuration-File-(Dihedrals)"
|
---|
2818 |
|
---|
2819 | \end_inset
|
---|
2820 |
|
---|
2821 |
|
---|
2822 | \end_layout
|
---|
2823 |
|
---|
2824 | \begin_layout Standard
|
---|
2825 | With option '
|
---|
2826 | \shape italic
|
---|
2827 | iabin = 1
|
---|
2828 | \shape default
|
---|
2829 | ' SMMP allows to provide a designated start configuration by listing dihedral
|
---|
2830 | angles in a second input file.
|
---|
2831 | If no name of any configuration file is given (or the name of a non-existing
|
---|
2832 | file is entered), all variables retain their default values as defined
|
---|
2833 | in the libraries.
|
---|
2834 | \end_layout
|
---|
2835 |
|
---|
2836 | \begin_layout Standard
|
---|
2837 | This configuration file has to follow a fixed structure in which each line
|
---|
2838 | can be considered as a COMMAND for subroutine '
|
---|
2839 | \shape italic
|
---|
2840 | redvar
|
---|
2841 | \shape default
|
---|
2842 | '.
|
---|
2843 | The following syntax has to be used in each COMMAND: RESIDUE : VARIABLE
|
---|
2844 | : VALUE Hence, each line can consist of up to 3 FIELDS, separated by an
|
---|
2845 | ':'.
|
---|
2846 | In the first field the RESIDUE is selected through an INTEGER number which
|
---|
2847 | marks its position in the amino acid sequence.
|
---|
2848 | The second field should contain a string with the name of the VARIABLE,
|
---|
2849 | i.e.
|
---|
2850 | names the specific dihedral angle.
|
---|
2851 | The last field provides the value for the VARIABLE (a REAL number) and
|
---|
2852 | is mandatory.
|
---|
2853 | A symbol '&' following this number indicates that the variable will be
|
---|
2854 | fixed to that value throughout the whole simulation process.
|
---|
2855 | Spaces are not significant and are therefore ignored.
|
---|
2856 | Empty COMMANDS, as ' : : ', and empty lines or lines containing '#' are
|
---|
2857 | ignored.
|
---|
2858 | Missing fields are interpreted as 'for all':
|
---|
2859 | \begin_inset ERT
|
---|
2860 | status collapsed
|
---|
2861 |
|
---|
2862 | \begin_layout Standard
|
---|
2863 |
|
---|
2864 |
|
---|
2865 | \backslash
|
---|
2866 | begin{verbatim}
|
---|
2867 | \end_layout
|
---|
2868 |
|
---|
2869 | \begin_layout Standard
|
---|
2870 |
|
---|
2871 | 1 : phi : 180 Set phi of residue #1 to 180 degrees
|
---|
2872 | \end_layout
|
---|
2873 |
|
---|
2874 | \begin_layout Standard
|
---|
2875 |
|
---|
2876 | 1 : phi : 180& Keep phi of residue #1 fixed to 180 degrees
|
---|
2877 | \end_layout
|
---|
2878 |
|
---|
2879 | \begin_layout Standard
|
---|
2880 |
|
---|
2881 | phi : 180 Set phi of ALL residues to 180 degrees
|
---|
2882 | \end_layout
|
---|
2883 |
|
---|
2884 | \begin_layout Standard
|
---|
2885 |
|
---|
2886 | 180 Set all variables to 180 degrees
|
---|
2887 | \end_layout
|
---|
2888 |
|
---|
2889 | \begin_layout Standard
|
---|
2890 |
|
---|
2891 |
|
---|
2892 | \backslash
|
---|
2893 | end{verbatim}
|
---|
2894 | \end_layout
|
---|
2895 |
|
---|
2896 | \end_inset
|
---|
2897 |
|
---|
2898 | Several consecutive residues or variables can be indicated by ZONES of
|
---|
2899 | indices.
|
---|
2900 | Several NAMES can be indicated by wild-card ('*') and are case-sensitive:
|
---|
2901 |
|
---|
2902 | \begin_inset ERT
|
---|
2903 | status collapsed
|
---|
2904 |
|
---|
2905 | \begin_layout Standard
|
---|
2906 |
|
---|
2907 |
|
---|
2908 | \backslash
|
---|
2909 | begin{verbatim}
|
---|
2910 | \end_layout
|
---|
2911 |
|
---|
2912 | \begin_layout Standard
|
---|
2913 |
|
---|
2914 | 1-4 : phi : 180 Set 'phi' of residues #1,#2,#3, and #4 to 180 deg.
|
---|
2915 |
|
---|
2916 | \end_layout
|
---|
2917 |
|
---|
2918 | \begin_layout Standard
|
---|
2919 |
|
---|
2920 | 5 : x* : 60 Set all xi-angles of residue #5 to 60 deg.
|
---|
2921 | \end_layout
|
---|
2922 |
|
---|
2923 | \begin_layout Standard
|
---|
2924 |
|
---|
2925 |
|
---|
2926 | \backslash
|
---|
2927 | end{verbatim}
|
---|
2928 | \end_layout
|
---|
2929 |
|
---|
2930 | \end_inset
|
---|
2931 |
|
---|
2932 | Several NAMES or INDICES may be given in the same field, when separated
|
---|
2933 | by ','.
|
---|
2934 | Similarly, several commands may be given on the same line and must be separated
|
---|
2935 | by ';'
|
---|
2936 | \begin_inset ERT
|
---|
2937 | status collapsed
|
---|
2938 |
|
---|
2939 | \begin_layout Standard
|
---|
2940 |
|
---|
2941 |
|
---|
2942 | \backslash
|
---|
2943 | begin{verbatim}
|
---|
2944 | \end_layout
|
---|
2945 |
|
---|
2946 | \begin_layout Standard
|
---|
2947 |
|
---|
2948 | phi, psi : -30 Set all phi & psi to -30 deg.
|
---|
2949 |
|
---|
2950 | \end_layout
|
---|
2951 |
|
---|
2952 | \begin_layout Standard
|
---|
2953 |
|
---|
2954 | phi:-65; psi:-45 Set all phi=-65, all psi=-45
|
---|
2955 | \end_layout
|
---|
2956 |
|
---|
2957 | \begin_layout Standard
|
---|
2958 |
|
---|
2959 |
|
---|
2960 | \backslash
|
---|
2961 | end{verbatim}
|
---|
2962 | \end_layout
|
---|
2963 |
|
---|
2964 | \end_inset
|
---|
2965 |
|
---|
2966 | Note, that dihedral angles are defined slightly differently in SMMP than
|
---|
2967 | in standard ECEPP (residue index in parenthesis):
|
---|
2968 | \begin_inset ERT
|
---|
2969 | status open
|
---|
2970 |
|
---|
2971 | \begin_layout Standard
|
---|
2972 |
|
---|
2973 |
|
---|
2974 | \backslash
|
---|
2975 | begin{verbatim}
|
---|
2976 | \end_layout
|
---|
2977 |
|
---|
2978 | \begin_layout Standard
|
---|
2979 |
|
---|
2980 | - psi of the i-th residue = defined by N (i-1) - CA(i-1) - C (i-1) - N(i)
|
---|
2981 |
|
---|
2982 | \end_layout
|
---|
2983 |
|
---|
2984 | \begin_layout Standard
|
---|
2985 |
|
---|
2986 | - omg of the i-th residue = defined by CA(i-1) - C (i-1) - N (i) - CA(i)
|
---|
2987 |
|
---|
2988 | \end_layout
|
---|
2989 |
|
---|
2990 | \begin_layout Standard
|
---|
2991 |
|
---|
2992 | - phi for the i-th residue = defined by C (i-1) - N (i) - CA(i) - C(i)
|
---|
2993 |
|
---|
2994 | \end_layout
|
---|
2995 |
|
---|
2996 | \begin_layout Standard
|
---|
2997 |
|
---|
2998 |
|
---|
2999 | \backslash
|
---|
3000 | end{verbatim}
|
---|
3001 | \end_layout
|
---|
3002 |
|
---|
3003 | \end_inset
|
---|
3004 |
|
---|
3005 | except:
|
---|
3006 | \begin_inset ERT
|
---|
3007 | status open
|
---|
3008 |
|
---|
3009 | \begin_layout Standard
|
---|
3010 |
|
---|
3011 |
|
---|
3012 | \backslash
|
---|
3013 | begin{verbatim}
|
---|
3014 | \end_layout
|
---|
3015 |
|
---|
3016 | \begin_layout Standard
|
---|
3017 |
|
---|
3018 | phi for the 1st residue = defined by H1(1) - N (1) - CA(1) - C(1)
|
---|
3019 | \end_layout
|
---|
3020 |
|
---|
3021 | \begin_layout Standard
|
---|
3022 |
|
---|
3023 |
|
---|
3024 | \backslash
|
---|
3025 | end{verbatim}
|
---|
3026 | \end_layout
|
---|
3027 |
|
---|
3028 | \end_inset
|
---|
3029 |
|
---|
3030 | (H2-atom in the N-terminal NH2-group is added via dihedral 'H2-N-CA-C'=
|
---|
3031 | phi + 120)
|
---|
3032 | \end_layout
|
---|
3033 |
|
---|
3034 | \begin_layout Standard
|
---|
3035 | If a molecule consists of n residues then:
|
---|
3036 | \begin_inset ERT
|
---|
3037 | status open
|
---|
3038 |
|
---|
3039 | \begin_layout Standard
|
---|
3040 |
|
---|
3041 |
|
---|
3042 | \backslash
|
---|
3043 | begin{verbatim}
|
---|
3044 | \end_layout
|
---|
3045 |
|
---|
3046 | \begin_layout Standard
|
---|
3047 |
|
---|
3048 | - pst = defines dihedral N (n) - CA(n) - C (n) - Oxt(n)
|
---|
3049 | \end_layout
|
---|
3050 |
|
---|
3051 | \begin_layout Standard
|
---|
3052 |
|
---|
3053 | - omt = defines dihedral CA(n) - C (n) - Oxt(n) - Hxt(n)
|
---|
3054 | \end_layout
|
---|
3055 |
|
---|
3056 | \begin_layout Standard
|
---|
3057 |
|
---|
3058 |
|
---|
3059 | \backslash
|
---|
3060 | end{verbatim}
|
---|
3061 | \end_layout
|
---|
3062 |
|
---|
3063 | \end_inset
|
---|
3064 |
|
---|
3065 | (Oxt & Hxt comprise the hydroxyl of the C-terminal carboxyl group)
|
---|
3066 | \end_layout
|
---|
3067 |
|
---|
3068 | \begin_layout Standard
|
---|
3069 | The following example configuration file
|
---|
3070 | \shape italic
|
---|
3071 | enkefa.var
|
---|
3072 | \shape default
|
---|
3073 | is provided with the program and may be used with the sequence file
|
---|
3074 | \shape italic
|
---|
3075 | enkefa.seq
|
---|
3076 | \shape default
|
---|
3077 | :
|
---|
3078 | \begin_inset ERT
|
---|
3079 | status collapsed
|
---|
3080 |
|
---|
3081 | \begin_layout Standard
|
---|
3082 |
|
---|
3083 |
|
---|
3084 | \backslash
|
---|
3085 | begin{verbatim}
|
---|
3086 | \end_layout
|
---|
3087 |
|
---|
3088 | \begin_layout Standard
|
---|
3089 |
|
---|
3090 | ------------------- enkefa.var --------------------------
|
---|
3091 | \end_layout
|
---|
3092 |
|
---|
3093 | \begin_layout Standard
|
---|
3094 |
|
---|
3095 | 1 : phi : -86.24
|
---|
3096 | \end_layout
|
---|
3097 |
|
---|
3098 | \begin_layout Standard
|
---|
3099 |
|
---|
3100 | 1 : x1 : -172.59
|
---|
3101 | \end_layout
|
---|
3102 |
|
---|
3103 | \begin_layout Standard
|
---|
3104 |
|
---|
3105 | 1 : x2 : 78.71
|
---|
3106 | \end_layout
|
---|
3107 |
|
---|
3108 | \begin_layout Standard
|
---|
3109 |
|
---|
3110 | 1 : x6 : -165.88
|
---|
3111 | \end_layout
|
---|
3112 |
|
---|
3113 | \begin_layout Standard
|
---|
3114 |
|
---|
3115 | 2 : psi : 156.18
|
---|
3116 | \end_layout
|
---|
3117 |
|
---|
3118 | \begin_layout Standard
|
---|
3119 |
|
---|
3120 | 2 : omg : 180.00
|
---|
3121 | \end_layout
|
---|
3122 |
|
---|
3123 | \begin_layout Standard
|
---|
3124 |
|
---|
3125 | 2 : phi : -154.53
|
---|
3126 | \end_layout
|
---|
3127 |
|
---|
3128 | \begin_layout Standard
|
---|
3129 |
|
---|
3130 | 3 : psi : 83.64
|
---|
3131 | \end_layout
|
---|
3132 |
|
---|
3133 | \begin_layout Standard
|
---|
3134 |
|
---|
3135 | 3 : omg : 180.00
|
---|
3136 | \end_layout
|
---|
3137 |
|
---|
3138 | \begin_layout Standard
|
---|
3139 |
|
---|
3140 | 3 : phi : 83.66
|
---|
3141 | \end_layout
|
---|
3142 |
|
---|
3143 | \begin_layout Standard
|
---|
3144 |
|
---|
3145 | 4 : psi : -73.86
|
---|
3146 | \end_layout
|
---|
3147 |
|
---|
3148 | \begin_layout Standard
|
---|
3149 |
|
---|
3150 | 4 : omg : 180.00
|
---|
3151 | \end_layout
|
---|
3152 |
|
---|
3153 | \begin_layout Standard
|
---|
3154 |
|
---|
3155 | 4 : phi : -137.04
|
---|
3156 | \end_layout
|
---|
3157 |
|
---|
3158 | \begin_layout Standard
|
---|
3159 |
|
---|
3160 | 4 : x1 : 58.79
|
---|
3161 | \end_layout
|
---|
3162 |
|
---|
3163 | \begin_layout Standard
|
---|
3164 |
|
---|
3165 | 4 : x2 : 94.60
|
---|
3166 | \end_layout
|
---|
3167 |
|
---|
3168 | \begin_layout Standard
|
---|
3169 |
|
---|
3170 | 5 : psi : 19.33
|
---|
3171 | \end_layout
|
---|
3172 |
|
---|
3173 | \begin_layout Standard
|
---|
3174 |
|
---|
3175 | 5 : omg : -180.00
|
---|
3176 | \end_layout
|
---|
3177 |
|
---|
3178 | \begin_layout Standard
|
---|
3179 |
|
---|
3180 | 5 : phi : -163.63
|
---|
3181 | \end_layout
|
---|
3182 |
|
---|
3183 | \begin_layout Standard
|
---|
3184 |
|
---|
3185 | 5 : x1 : 52.76
|
---|
3186 | \end_layout
|
---|
3187 |
|
---|
3188 | \begin_layout Standard
|
---|
3189 |
|
---|
3190 | 5 : x2 : 175.28
|
---|
3191 | \end_layout
|
---|
3192 |
|
---|
3193 | \begin_layout Standard
|
---|
3194 |
|
---|
3195 | 5 : x3 : -179.83
|
---|
3196 | \end_layout
|
---|
3197 |
|
---|
3198 | \begin_layout Standard
|
---|
3199 |
|
---|
3200 | 5 : x4 : -58.57
|
---|
3201 | \end_layout
|
---|
3202 |
|
---|
3203 | \begin_layout Standard
|
---|
3204 |
|
---|
3205 | 5 : pst : 160.45
|
---|
3206 | \end_layout
|
---|
3207 |
|
---|
3208 | \begin_layout Standard
|
---|
3209 |
|
---|
3210 | 5 : omt : 180.00
|
---|
3211 | \end_layout
|
---|
3212 |
|
---|
3213 | \begin_layout Standard
|
---|
3214 |
|
---|
3215 | ---------------------------------------------------------
|
---|
3216 | \end_layout
|
---|
3217 |
|
---|
3218 | \begin_layout Standard
|
---|
3219 |
|
---|
3220 |
|
---|
3221 | \backslash
|
---|
3222 | end{verbatim}
|
---|
3223 | \end_layout
|
---|
3224 |
|
---|
3225 | \end_inset
|
---|
3226 |
|
---|
3227 |
|
---|
3228 | \end_layout
|
---|
3229 |
|
---|
3230 | \begin_layout Standard
|
---|
3231 | \begin_inset Float figure
|
---|
3232 | wide false
|
---|
3233 | sideways false
|
---|
3234 | status open
|
---|
3235 |
|
---|
3236 | \begin_layout Standard
|
---|
3237 | \align center
|
---|
3238 | \begin_inset Graphics
|
---|
3239 | filename atom_numbering.eps
|
---|
3240 | scaleBeforeRotation
|
---|
3241 |
|
---|
3242 | \end_inset
|
---|
3243 |
|
---|
3244 |
|
---|
3245 | \end_layout
|
---|
3246 |
|
---|
3247 | \begin_layout Standard
|
---|
3248 | \begin_inset Caption
|
---|
3249 |
|
---|
3250 | \begin_layout Standard
|
---|
3251 | \begin_inset LatexCommand label
|
---|
3252 | name "fig:Enumeration-of-atoms"
|
---|
3253 |
|
---|
3254 | \end_inset
|
---|
3255 |
|
---|
3256 | Enumeration of atoms in SMMP.
|
---|
3257 | Atoms are numbered starting from the N terminal of the protein.
|
---|
3258 | The terminal nitrogen has the index 1.
|
---|
3259 | Counting continues with the two attached hydrogens and then moves along
|
---|
3260 | the backbone.
|
---|
3261 | After the C
|
---|
3262 | \begin_inset Formula $_{\alpha}$
|
---|
3263 | \end_inset
|
---|
3264 |
|
---|
3265 | , we count along the side chain following a breadth-first scheme.
|
---|
3266 | Rings are enumerated counter clockwise.
|
---|
3267 |
|
---|
3268 | \end_layout
|
---|
3269 |
|
---|
3270 | \end_inset
|
---|
3271 |
|
---|
3272 |
|
---|
3273 | \end_layout
|
---|
3274 |
|
---|
3275 | \end_inset
|
---|
3276 |
|
---|
3277 |
|
---|
3278 | \end_layout
|
---|
3279 |
|
---|
3280 | \begin_layout Section
|
---|
3281 | Frequently used Functions and Subroutines
|
---|
3282 | \begin_inset LatexCommand label
|
---|
3283 | name "sec:Frequently-used-Functions"
|
---|
3284 |
|
---|
3285 | \end_inset
|
---|
3286 |
|
---|
3287 |
|
---|
3288 | \end_layout
|
---|
3289 |
|
---|
3290 | \begin_layout Subsection
|
---|
3291 | Task Subroutines
|
---|
3292 | \end_layout
|
---|
3293 |
|
---|
3294 | \begin_layout Standard
|
---|
3295 | In the following we describe some important simulation subroutines and their
|
---|
3296 | requisites.
|
---|
3297 | For more information see [1,2].
|
---|
3298 | Following the philosophy behind SMMP these routines are rather simple and
|
---|
3299 | may serve as templates which the user can modify according to his special
|
---|
3300 | needs.
|
---|
3301 |
|
---|
3302 | \end_layout
|
---|
3303 |
|
---|
3304 | \begin_layout Subsubsection
|
---|
3305 | Subroutine init_molecule(iabin, grpn, grpc, seqfile, varfile)
|
---|
3306 | \end_layout
|
---|
3307 |
|
---|
3308 | \begin_layout Standard
|
---|
3309 | (Usage: '
|
---|
3310 | \emph on
|
---|
3311 | call init_molecule(iabin, grpn, grpc, seqfile, varfile)')
|
---|
3312 | \end_layout
|
---|
3313 |
|
---|
3314 | \begin_layout Standard
|
---|
3315 | Initializes a new molecule and adds it to the system.
|
---|
3316 | The information is either read from a sequence (see
|
---|
3317 | \begin_inset LatexCommand ref
|
---|
3318 | reference "sub:Sequence-File"
|
---|
3319 |
|
---|
3320 | \end_inset
|
---|
3321 |
|
---|
3322 | ) and, optionally, a variable file (see
|
---|
3323 | \begin_inset LatexCommand ref
|
---|
3324 | reference "sub:Configuration-File-(Dihedrals)"
|
---|
3325 |
|
---|
3326 | \end_inset
|
---|
3327 |
|
---|
3328 | ) if
|
---|
3329 | \emph on
|
---|
3330 | iabin=1
|
---|
3331 | \emph default
|
---|
3332 | or from a pdb file (see
|
---|
3333 | \begin_inset LatexCommand ref
|
---|
3334 | reference "sub:PDB-File"
|
---|
3335 |
|
---|
3336 | \end_inset
|
---|
3337 |
|
---|
3338 | ) if
|
---|
3339 | \emph on
|
---|
3340 |
|
---|
3341 | \begin_inset Formula $iabin\neq1$
|
---|
3342 | \end_inset
|
---|
3343 |
|
---|
3344 |
|
---|
3345 | \emph default
|
---|
3346 | .
|
---|
3347 | If the molecule is read from a pdb file, the name of the file is given
|
---|
3348 | in
|
---|
3349 | \emph on
|
---|
3350 | seqfile
|
---|
3351 | \emph default
|
---|
3352 | .
|
---|
3353 | By repeatedly calling init_molecule, you can add several interacting molecules.
|
---|
3354 | The N-terminal group is determined by
|
---|
3355 | \emph on
|
---|
3356 | grpng
|
---|
3357 | \emph default
|
---|
3358 | and the C-terminal group
|
---|
3359 | \emph on
|
---|
3360 | grpc.
|
---|
3361 | \end_layout
|
---|
3362 |
|
---|
3363 | \begin_layout Subsubsection
|
---|
3364 | Subroutine REGUL(nml, iter, nsteps,
|
---|
3365 | \begin_inset Formula $\varepsilon$
|
---|
3366 | \end_inset
|
---|
3367 |
|
---|
3368 | )
|
---|
3369 | \begin_inset LatexCommand index
|
---|
3370 | name "REGUL"
|
---|
3371 |
|
---|
3372 | \end_inset
|
---|
3373 |
|
---|
3374 | (file regul.f)
|
---|
3375 | \end_layout
|
---|
3376 |
|
---|
3377 | \begin_layout Standard
|
---|
3378 | (Usage: '
|
---|
3379 | \shape italic
|
---|
3380 | call regul(nml, iter, nsteps,
|
---|
3381 | \begin_inset Formula $\varepsilon$
|
---|
3382 | \end_inset
|
---|
3383 |
|
---|
3384 | )
|
---|
3385 | \shape default
|
---|
3386 | ')
|
---|
3387 | \end_layout
|
---|
3388 |
|
---|
3389 | \begin_layout Standard
|
---|
3390 | For a given PDB-structure the actual bond lengths and bond angles generally
|
---|
3391 | differ from those in the standard geometry model assumed with the ECEPP
|
---|
3392 | or FLEX potential.
|
---|
3393 | This subroutine is applied to determine the configuration within the standard
|
---|
3394 | geometry that is as close as possible to a given PDB-structure with an
|
---|
3395 | energy as low as possible.
|
---|
3396 | This process of fitting a PDB structure into standard geometry is called
|
---|
3397 | regularization.
|
---|
3398 | '
|
---|
3399 | \shape italic
|
---|
3400 | regul
|
---|
3401 | \shape default
|
---|
3402 | ' requires the PDB-structure to be read into SMMP by setting '
|
---|
3403 | \shape italic
|
---|
3404 | iabin = 0
|
---|
3405 | \shape default
|
---|
3406 | ' in '
|
---|
3407 | \shape italic
|
---|
3408 | main
|
---|
3409 | \shape default
|
---|
3410 | '.
|
---|
3411 | With this option, `
|
---|
3412 | \shape italic
|
---|
3413 | init_molecule
|
---|
3414 | \shape default
|
---|
3415 | ' calls the subroutines `
|
---|
3416 | \shape italic
|
---|
3417 | pdbread
|
---|
3418 | \shape default
|
---|
3419 | ' and `
|
---|
3420 | \shape italic
|
---|
3421 | pdbvars
|
---|
3422 | \shape default
|
---|
3423 | ' that also to measure the dihedral angles in the PDB-structure.
|
---|
3424 | Using these dihedral angles a first model of the molecule is built using
|
---|
3425 | standard bonding geometry.
|
---|
3426 | Hence, '
|
---|
3427 | \shape italic
|
---|
3428 | regul
|
---|
3429 | \shape default
|
---|
3430 | ' has to be called AFTER '
|
---|
3431 | \shape italic
|
---|
3432 | init_molecule
|
---|
3433 | \shape default
|
---|
3434 | '.
|
---|
3435 | '
|
---|
3436 | \shape italic
|
---|
3437 | nml
|
---|
3438 | \shape default
|
---|
3439 | ' has to be set to 1 in the present version of SMMP.
|
---|
3440 | \end_layout
|
---|
3441 |
|
---|
3442 | \begin_layout Standard
|
---|
3443 | '
|
---|
3444 | \shape italic
|
---|
3445 | regul
|
---|
3446 | \shape default
|
---|
3447 | ' starts with a minimization of the initial structure using only the sum
|
---|
3448 | of squared distances between atom positions of the SMMP structure to the
|
---|
3449 | PDB-structure as
|
---|
3450 | \begin_inset Quotes erd
|
---|
3451 | \end_inset
|
---|
3452 |
|
---|
3453 | constraint energy
|
---|
3454 | \begin_inset Quotes erd
|
---|
3455 | \end_inset
|
---|
3456 |
|
---|
3457 | .
|
---|
3458 | After this initial step, a list of bad atom contacts, i.e.
|
---|
3459 | atoms with vdW-energy of more than 2 kcal/mol (as calculated by '
|
---|
3460 | \shape italic
|
---|
3461 | cnteny
|
---|
3462 | \shape default
|
---|
3463 | ') and the root-mean-square-deviation (rmsd) to the PDB-structure is printed
|
---|
3464 | out.
|
---|
3465 | In a second step, the physical energy is minimized, allowing only hydrogens
|
---|
3466 | to move, and bad contacts and the rmsd are evaluated, again.
|
---|
3467 | A number of iterations follow where a composite energy as the weighted
|
---|
3468 | sum of physical and constraint energy is minimized.
|
---|
3469 | In this iterations the weight of the constraint energy is successively
|
---|
3470 | lowered to zero, and that of the physical energy raised to one.
|
---|
3471 | At the end, the dihedral angles of the final structure are printed out
|
---|
3472 | together with its rmsd and list of remaining bad contacts.
|
---|
3473 |
|
---|
3474 | \end_layout
|
---|
3475 |
|
---|
3476 | \begin_layout Subsubsection
|
---|
3477 | Subroutine MINIM(imin, maxit,
|
---|
3478 | \begin_inset Formula $\varepsilon$
|
---|
3479 | \end_inset
|
---|
3480 |
|
---|
3481 | )
|
---|
3482 | \begin_inset LatexCommand index
|
---|
3483 | name "MINIM"
|
---|
3484 |
|
---|
3485 | \end_inset
|
---|
3486 |
|
---|
3487 | (file minim.f):
|
---|
3488 | \end_layout
|
---|
3489 |
|
---|
3490 | \begin_layout Standard
|
---|
3491 | (Usage:
|
---|
3492 | \shape italic
|
---|
3493 | 'call minim(imin
|
---|
3494 | \shape default
|
---|
3495 | , maxit,
|
---|
3496 | \begin_inset Formula $\varepsilon$
|
---|
3497 | \end_inset
|
---|
3498 |
|
---|
3499 | )')
|
---|
3500 | \newline
|
---|
3501 | This subroutine minimizes the current configuration of the molecule.
|
---|
3502 | It can be called from any point during the simulation once a configuration
|
---|
3503 | is defined.
|
---|
3504 | When calling this subroutine one needs to specify the type of minimizer
|
---|
3505 | through variable '
|
---|
3506 | \shape italic
|
---|
3507 | imin
|
---|
3508 | \shape default
|
---|
3509 | '.
|
---|
3510 | Setting '
|
---|
3511 | \shape italic
|
---|
3512 | imin = 1
|
---|
3513 | \shape default
|
---|
3514 | ' chooses a Quasi-Newton minimizer by calling '
|
---|
3515 | \shape italic
|
---|
3516 | minqsn
|
---|
3517 | \shape default
|
---|
3518 | ', '
|
---|
3519 | \shape italic
|
---|
3520 | imin = 2
|
---|
3521 | \shape default
|
---|
3522 | ' a Conjugate Gradient minimizer ('
|
---|
3523 | \shape italic
|
---|
3524 | mincjg
|
---|
3525 | \shape default
|
---|
3526 | ').
|
---|
3527 | The performance of these minimizers can be controlled by setting various
|
---|
3528 | parameters in MINIM.
|
---|
3529 | The two most commonly used ones, the accuracy ('
|
---|
3530 | \begin_inset Formula $\varepsilon$
|
---|
3531 | \end_inset
|
---|
3532 |
|
---|
3533 | ') and the total number of function calls 'mxit' are passed as arguments.
|
---|
3534 | \end_layout
|
---|
3535 |
|
---|
3536 | \begin_layout Subsubsection
|
---|
3537 | Subroutine CANON(nequi, nswp, nmes, temp, lrand)
|
---|
3538 | \begin_inset LatexCommand index
|
---|
3539 | name "CANON"
|
---|
3540 |
|
---|
3541 | \end_inset
|
---|
3542 |
|
---|
3543 | (file canon.f):
|
---|
3544 | \end_layout
|
---|
3545 |
|
---|
3546 | \begin_layout Standard
|
---|
3547 | (Usage: '
|
---|
3548 | \emph on
|
---|
3549 | call canon(nequi, nswp, nmes, temp, lrand)
|
---|
3550 | \emph default
|
---|
3551 | ')
|
---|
3552 | \newline
|
---|
3553 | The subroutine carries out a canonical simulation at temperature 'temp'.
|
---|
3554 | The simulation starts from a random configuration if the logical parameter
|
---|
3555 | 'lrand' is set to
|
---|
3556 | \shape italic
|
---|
3557 | .TRUE.
|
---|
3558 | \shape default
|
---|
3559 | .
|
---|
3560 | Otherwise the simulation starts from the current conformation of dihedral
|
---|
3561 | angles as stored in array 'vlvr'.
|
---|
3562 | One also has to set the number of Monte Carlo sweeps for the simulation
|
---|
3563 | 'nswp', and the equilibration 'nequi', as well as the number 'nmes' of
|
---|
3564 | Monte Carlo sweeps between measurements.
|
---|
3565 | Three output files are created: files `start.pdb' and 'final.pdb' are for
|
---|
3566 | storing the start and final configurations of the molecule, respectively,
|
---|
3567 | in a data format compatible with Protein Data Bank.
|
---|
3568 | The file 'time.d' contains the time series of some quantities.
|
---|
3569 | In our template we measure and store in this file the total energy 'eol';
|
---|
3570 | the radius-of-gyration `rgy' (by means of subroutine RGYR (
|
---|
3571 | \begin_inset LatexCommand ref
|
---|
3572 | reference "ite:Subroutine-RGYR"
|
---|
3573 |
|
---|
3574 | \end_inset
|
---|
3575 |
|
---|
3576 | )); the number of helical (
|
---|
3577 | \begin_inset Formula $\beta$
|
---|
3578 | \end_inset
|
---|
3579 |
|
---|
3580 | -sheet-like) residues 'nhel' ('nbet') and segments 'mhel' (`mbet') using
|
---|
3581 | subroutine HELIX (
|
---|
3582 | \begin_inset LatexCommand ref
|
---|
3583 | reference "ite:subroutine-HELIX"
|
---|
3584 |
|
---|
3585 | \end_inset
|
---|
3586 |
|
---|
3587 | ); and the number of hydrogen bonds 'mhb' calculated through subroutine
|
---|
3588 | HBOND (
|
---|
3589 | \begin_inset LatexCommand ref
|
---|
3590 | reference "ite:Subroutine-HBOND"
|
---|
3591 |
|
---|
3592 | \end_inset
|
---|
3593 |
|
---|
3594 | ).
|
---|
3595 |
|
---|
3596 | \end_layout
|
---|
3597 |
|
---|
3598 | \begin_layout Subsubsection
|
---|
3599 | Subroutine ANNEAL(nequi, nswp, nmes, tmax, tmin, lrand)
|
---|
3600 | \begin_inset LatexCommand index
|
---|
3601 | name "ANNEAL"
|
---|
3602 |
|
---|
3603 | \end_inset
|
---|
3604 |
|
---|
3605 | (file: anneal.f):
|
---|
3606 | \end_layout
|
---|
3607 |
|
---|
3608 | \begin_layout Standard
|
---|
3609 | (Usage: '
|
---|
3610 | \emph on
|
---|
3611 | call anneal(nequi, nswp, nmes, tmax, tmin, lrand)
|
---|
3612 | \emph default
|
---|
3613 | ')
|
---|
3614 | \end_layout
|
---|
3615 |
|
---|
3616 | \begin_layout Standard
|
---|
3617 | This subroutine allows for optimization of protein conformations by means
|
---|
3618 | of simulated annealing.
|
---|
3619 | When the logical parameter 'lrand' is set to
|
---|
3620 | \shape italic
|
---|
3621 | .TRUE.
|
---|
3622 |
|
---|
3623 | \shape default
|
---|
3624 | then the program will start from a random configuration.
|
---|
3625 | Otherwise, the annealing process will start from the current configuration
|
---|
3626 | as stored in the array 'vlvr'.
|
---|
3627 | You have to set the initial and final temperatures 'tmax' and 'tmin', the
|
---|
3628 | number of Monte Carlo sweeps for simulation nswp and equilibration 'nequi',
|
---|
3629 | and the number 'nmes' of Monte Carlo sweeps between measurements.
|
---|
3630 | Four output files are created in the same directory where the executable
|
---|
3631 | is running: three of them contain the start (start.pdb), the final (final.pdb)
|
---|
3632 | and the global minimum configuration (global.pdb), respectively, the 4th
|
---|
3633 | file (time.d) contains the time series of the simulation.
|
---|
3634 | In the presented template we measure and store in this file the actual
|
---|
3635 | temperature 'temp', the total energy 'eol', the radius-of-gyration 'rgy'
|
---|
3636 | (as calculated by subroutine RGYR) and the Zimmerman code (as character
|
---|
3637 | variable 'zimm') of the present configuration as obtained through subroutine
|
---|
3638 | ZIMMER.
|
---|
3639 |
|
---|
3640 | \end_layout
|
---|
3641 |
|
---|
3642 | \begin_layout Subsubsection
|
---|
3643 | Subroutine MULCAN_PAR(nsweep, nup, temp, kmin, kmax, binWidth, l_iter)
|
---|
3644 | \begin_inset LatexCommand index
|
---|
3645 | name "MULCANPAR"
|
---|
3646 |
|
---|
3647 | \end_inset
|
---|
3648 |
|
---|
3649 | (file mulcan_mod_par.f):
|
---|
3650 | \end_layout
|
---|
3651 |
|
---|
3652 | \begin_layout Standard
|
---|
3653 | This subroutine is part of the module
|
---|
3654 | \emph on
|
---|
3655 | multicanonical
|
---|
3656 | \emph default
|
---|
3657 | .
|
---|
3658 | To use the function include the module with
|
---|
3659 | \emph on
|
---|
3660 | use multicanonical
|
---|
3661 | \emph default
|
---|
3662 | in your main file.
|
---|
3663 | The subroutine calculates multicanonical weight factors and has two working
|
---|
3664 | modes.
|
---|
3665 | One is for improving the already existing set of multicanonical parameters
|
---|
3666 | through further iterations, and another to calculate them anew.
|
---|
3667 | In the first case the logical variable 'l_iter' is set to the value
|
---|
3668 | \shape italic
|
---|
3669 | .TRUE.
|
---|
3670 | \shape default
|
---|
3671 | .
|
---|
3672 | The histogram from a preliminary simulation as well as the existing values
|
---|
3673 | of the parameters are read from the file 'mpar_full.d'.
|
---|
3674 | In the second case ( 'l_iter' = .FALSE.) all arrays are initialized to zero.
|
---|
3675 | The values of 'kmin' and 'kmax' together with and the size of the energy
|
---|
3676 | bin 'ebinWidth' determine the energy range .
|
---|
3677 | The total number of Monte Carlo sweeps is given by 'nsweep', 'nup' is the
|
---|
3678 | number of Monte Carlo sweeps between updates of the multicanonical parameters,
|
---|
3679 | and 'temp' is the temperature of the initial canonical simulation.
|
---|
3680 | Every 'nup' sweeps the histogram of the preliminary simulation as well
|
---|
3681 | as the existing values of the parameters are written to the file 'mpar_full.d'.
|
---|
3682 | The final multicanonical parameters are written into the file 'muca.d'.
|
---|
3683 |
|
---|
3684 | \end_layout
|
---|
3685 |
|
---|
3686 | \begin_layout Subsubsection
|
---|
3687 | Subroutine MULCAN_SIM(nequi, nsweeps, nmes, nsave, kmin, kmax, binWidth,
|
---|
3688 | restart)
|
---|
3689 | \begin_inset LatexCommand index
|
---|
3690 | name "MULCANSIM"
|
---|
3691 |
|
---|
3692 | \end_inset
|
---|
3693 |
|
---|
3694 | (file mulcan_sim.f):
|
---|
3695 | \end_layout
|
---|
3696 |
|
---|
3697 | \begin_layout Standard
|
---|
3698 | This subroutine performs a Monte Carlo simulation of a protein using multicanoni
|
---|
3699 | cal weights.
|
---|
3700 | Information necessary for a re-start are saved after every 'nsave' Monte
|
---|
3701 | Carlo moves into the file 'start.d'.
|
---|
3702 | You can restart a simulation by setting 'restart'=.TRUE.
|
---|
3703 | otherwise the simulation starts from a random configuration.
|
---|
3704 | Parameters 'binWidth', 'kmin', and 'kmax' set the energy-bin size and the
|
---|
3705 | lower and upper limits of the energy interval, within which the multicanonical
|
---|
3706 | parameters were defined (see MULCAN_PAR).
|
---|
3707 | These parameters are read from the file 'muca.d' and have to be the same
|
---|
3708 | as the ones used in MULCAN_PAR to generate the multicanonical weights.
|
---|
3709 | The total number of Monte Carlo sweeps is 'nsweep', the number of Monte
|
---|
3710 | Carlo sweeps needed for equilibration is 'nequi', and the interval between
|
---|
3711 | successive measurements is 'nmes'.
|
---|
3712 | In our example the output goes to 'time.d', in which the time series of
|
---|
3713 | the simulation is written.
|
---|
3714 | Measured quantities are the total potential energy 'eol', the number of
|
---|
3715 | contacts 'nhx' and the number of native contacts 'nhy'.
|
---|
3716 | The latter number counts the contacts that are the same in the present
|
---|
3717 | configuration and the target structure.
|
---|
3718 | Also measured is the Hamming distance 'dham' between the present and the
|
---|
3719 | target configuration.
|
---|
3720 | The latter three quantities are calculated by the subroutine CONTACTS.
|
---|
3721 | The contact map needs to be initialized before calling mulcan_sim., for
|
---|
3722 | example with the following code:
|
---|
3723 | \begin_inset ERT
|
---|
3724 | status collapsed
|
---|
3725 |
|
---|
3726 | \begin_layout Standard
|
---|
3727 |
|
---|
3728 |
|
---|
3729 | \backslash
|
---|
3730 | begin{verbatim}
|
---|
3731 | \end_layout
|
---|
3732 |
|
---|
3733 | \begin_layout Standard
|
---|
3734 |
|
---|
3735 | open(9,file='enkefa.ref')
|
---|
3736 | \end_layout
|
---|
3737 |
|
---|
3738 | \begin_layout Standard
|
---|
3739 |
|
---|
3740 | nresi=irsml2(1)-irsml1(1) + 1
|
---|
3741 | \end_layout
|
---|
3742 |
|
---|
3743 | \begin_layout Standard
|
---|
3744 |
|
---|
3745 | ! nresi: Number of residues
|
---|
3746 | \end_layout
|
---|
3747 |
|
---|
3748 | \begin_layout Standard
|
---|
3749 |
|
---|
3750 | ! Read reference contact map
|
---|
3751 | \end_layout
|
---|
3752 |
|
---|
3753 | \begin_layout Standard
|
---|
3754 |
|
---|
3755 | nci = 0
|
---|
3756 | \end_layout
|
---|
3757 |
|
---|
3758 | \begin_layout Standard
|
---|
3759 |
|
---|
3760 | do i=1,nresi
|
---|
3761 | \end_layout
|
---|
3762 |
|
---|
3763 | \begin_layout Standard
|
---|
3764 |
|
---|
3765 | read(9,*) (iref(i,j) , j=1,nresi)
|
---|
3766 | \end_layout
|
---|
3767 |
|
---|
3768 | \begin_layout Standard
|
---|
3769 |
|
---|
3770 | end do
|
---|
3771 | \end_layout
|
---|
3772 |
|
---|
3773 | \begin_layout Standard
|
---|
3774 |
|
---|
3775 | do i=1,nresi
|
---|
3776 | \end_layout
|
---|
3777 |
|
---|
3778 | \begin_layout Standard
|
---|
3779 |
|
---|
3780 | do j=nresi,i+3,-1
|
---|
3781 | \end_layout
|
---|
3782 |
|
---|
3783 | \begin_layout Standard
|
---|
3784 |
|
---|
3785 | if(iref(i,j).eq.1) nci = nci + 1
|
---|
3786 | \end_layout
|
---|
3787 |
|
---|
3788 | \begin_layout Standard
|
---|
3789 |
|
---|
3790 | end do
|
---|
3791 | \end_layout
|
---|
3792 |
|
---|
3793 | \begin_layout Standard
|
---|
3794 |
|
---|
3795 | end do
|
---|
3796 | \end_layout
|
---|
3797 |
|
---|
3798 | \begin_layout Standard
|
---|
3799 |
|
---|
3800 | write(*,*) 'Number of contacts in reference conformation:',nci
|
---|
3801 | \end_layout
|
---|
3802 |
|
---|
3803 | \begin_layout Standard
|
---|
3804 |
|
---|
3805 |
|
---|
3806 | \backslash
|
---|
3807 | end{verbatim}
|
---|
3808 | \end_layout
|
---|
3809 |
|
---|
3810 | \end_inset
|
---|
3811 |
|
---|
3812 |
|
---|
3813 | \end_layout
|
---|
3814 |
|
---|
3815 | \begin_layout Subsubsection
|
---|
3816 | Subroutine PARTEM_S
|
---|
3817 | \begin_inset LatexCommand index
|
---|
3818 | name "PARTEMS"
|
---|
3819 |
|
---|
3820 | \end_inset
|
---|
3821 |
|
---|
3822 |
|
---|
3823 | \end_layout
|
---|
3824 |
|
---|
3825 | \begin_layout Standard
|
---|
3826 | (file partem_s.f):
|
---|
3827 | \end_layout
|
---|
3828 |
|
---|
3829 | \begin_layout Standard
|
---|
3830 | This parameterless subroutine is designed to simulate a protein by means
|
---|
3831 | of the parallel tempering technique on a single processor.
|
---|
3832 | Before running a parallel tempering simulation using PARTEM_S one has to
|
---|
3833 | set the following variables in this subroutine: the number of replicas
|
---|
3834 | ('no') and the initial temperatures on each replica (array 'temp(no)');
|
---|
3835 | the sum of the number of degrees of freedom over all replicas ('nvrmax');
|
---|
3836 | the number of Monte Carlo sweeps at equilibration ('nequi') and the number
|
---|
3837 | of Monte Carlo sweeps between measurements ('nmes').
|
---|
3838 | Except for re-starts, the logical variable 'lstart' should be set to .FALSE.,
|
---|
3839 | in which case all dihedral angles are set to random values.
|
---|
3840 | At the end of the simulation all dihedral angles are stored in the file
|
---|
3841 | 'startconf.d', from which the program reads its start configuration, if
|
---|
3842 | 'lstart=.TRUE.'.
|
---|
3843 | In the simulation, measurements are made every 'nmes' Monte Carlo sweeps.
|
---|
3844 | In our template, we measure for each replica the radius-of gyration 'rgy'
|
---|
3845 | and the end-to-end distance 'ee' by means of subroutine RGYR and write
|
---|
3846 | both values together with the temperature 'temp0' , total energy 'energy',
|
---|
3847 | Monte Carlo time 'nsw', and the index of the replicas 'k1' to an output
|
---|
3848 | file 'time.d'.
|
---|
3849 |
|
---|
3850 | \end_layout
|
---|
3851 |
|
---|
3852 | \begin_layout Subsubsection
|
---|
3853 | PMAIN and subroutine PARTEM_P
|
---|
3854 | \begin_inset LatexCommand index
|
---|
3855 | name "PARTEMP"
|
---|
3856 |
|
---|
3857 | \end_inset
|
---|
3858 |
|
---|
3859 | (files pmain.f and partem_p.f)
|
---|
3860 | \end_layout
|
---|
3861 |
|
---|
3862 | \begin_layout Standard
|
---|
3863 | (Usage: '
|
---|
3864 | \emph on
|
---|
3865 | call partem_p(no, nequi, nswp, nmes, newsta, switch)
|
---|
3866 | \emph default
|
---|
3867 | ')
|
---|
3868 | \end_layout
|
---|
3869 |
|
---|
3870 | \begin_layout Standard
|
---|
3871 | PMAIN and PARTEM_P are used for parallel tempering simulations on a parallel
|
---|
3872 | computer with 'no' nodes.
|
---|
3873 | PMAIN replaces MAIN in this case.
|
---|
3874 | Both PMAIN and PARTEM_P utilize the MPI message-passing routines.
|
---|
3875 | The number of nodes 'no' has to be set in the main program and equals the
|
---|
3876 | number of replicas in the parallel tempering method.
|
---|
3877 | In addition, one has to pass the following variables to PARTEM_P: the number
|
---|
3878 | of Monte Carlo sweeps for equilibration nequi and the total simulation
|
---|
3879 | nswp; and the number of Monte Carlo sweeps between measurements ('nmes').
|
---|
3880 | Except for restarts the logical variable 'newsta' should be set to .FALSE..
|
---|
3881 | If newsta is .TRUE., switch determines the starting configuration.
|
---|
3882 | If switch=1, all dihedral angles are set to the random values.
|
---|
3883 | If switch=-1, all dihedral angles are set to 180.
|
---|
3884 | If switch=0, the configuration remains unchanged.
|
---|
3885 | At the end of the simulation all dihedral angles are stored in the file
|
---|
3886 | 'par_R.in', from which the program reads its start configurations if 'newsta=.TRU
|
---|
3887 | E.'.
|
---|
3888 | Before running the program one has to prepare the file 'temp.d' with 'no'
|
---|
3889 | lines.
|
---|
3890 | Each line lists the index of replica 'j' and its temperature 'temp'.
|
---|
3891 | In our template we measure every 'nmes' Monte Carlo sweeps for each replica
|
---|
3892 | a number of quantities: the radius of gyration 'rgy', the number of residues
|
---|
3893 | 'nhel' and segments 'mhel' in an
|
---|
3894 | \begin_inset Formula $\alpha$
|
---|
3895 | \end_inset
|
---|
3896 |
|
---|
3897 | -helix, the number of residues in a
|
---|
3898 | \begin_inset Formula $\beta$
|
---|
3899 | \end_inset
|
---|
3900 |
|
---|
3901 | -sheet 'nbet' and the number of such segments 'mbet', the number of hydrogen
|
---|
3902 | bonds 'mhb', and the number of contacts 'nctot' and native contacts 'ncnat'.
|
---|
3903 | The latter number counts the contacts which are same in the present configurati
|
---|
3904 | on and in the target structure For this, one has to prepare in advance the
|
---|
3905 | file 'reference.d' with the contact matrix of the target structure.
|
---|
3906 | All measured quantities are written together with energy, temperature and
|
---|
3907 | the index of the corresponding replica in the file 'ts.d'.
|
---|
3908 | At the end of the simulation the average energy and specific heat for each
|
---|
3909 | temperature/replica and the acceptance rate of replica-exchange moves are
|
---|
3910 | written to standard output.
|
---|
3911 |
|
---|
3912 | \end_layout
|
---|
3913 |
|
---|
3914 | \begin_layout Subsection
|
---|
3915 | Useful Subroutines
|
---|
3916 | \end_layout
|
---|
3917 |
|
---|
3918 | \begin_layout Subsubsection
|
---|
3919 | Subroutine CONTACTS
|
---|
3920 | \begin_inset LatexCommand index
|
---|
3921 | name "CONTACTS"
|
---|
3922 |
|
---|
3923 | \end_inset
|
---|
3924 |
|
---|
3925 |
|
---|
3926 | \end_layout
|
---|
3927 |
|
---|
3928 | \begin_layout Standard
|
---|
3929 | (Usage:
|
---|
3930 | \shape italic
|
---|
3931 | call contacts(ncn,nham2,dham)
|
---|
3932 | \shape default
|
---|
3933 | ):
|
---|
3934 | \end_layout
|
---|
3935 |
|
---|
3936 | \begin_layout Standard
|
---|
3937 | This subroutine calculates the matrix of the van-der-Waals contacts between
|
---|
3938 | C
|
---|
3939 | \begin_inset Formula $^{\alpha}$
|
---|
3940 | \end_inset
|
---|
3941 |
|
---|
3942 | -atoms for a given configuration.
|
---|
3943 | 'ncn' is the total number of such contacts, 'nham2' the number of native
|
---|
3944 | contacts (i.e.
|
---|
3945 | such con- tacts which are the same in the present configuration and the
|
---|
3946 | reference configuration), and the Hamming distance 'dham' between the present
|
---|
3947 | and the target configuration.
|
---|
3948 |
|
---|
3949 | \end_layout
|
---|
3950 |
|
---|
3951 | \begin_layout Subsubsection
|
---|
3952 | Subroutine CNTENY
|
---|
3953 | \begin_inset LatexCommand index
|
---|
3954 | name "CNTENY"
|
---|
3955 |
|
---|
3956 | \end_inset
|
---|
3957 |
|
---|
3958 | :
|
---|
3959 | \end_layout
|
---|
3960 |
|
---|
3961 | \begin_layout Standard
|
---|
3962 | (Usage:
|
---|
3963 | \emph on
|
---|
3964 | call cnteny(nml)
|
---|
3965 | \emph default
|
---|
3966 | )
|
---|
3967 | \end_layout
|
---|
3968 |
|
---|
3969 | \begin_layout Standard
|
---|
3970 | The subroutine '
|
---|
3971 | \emph on
|
---|
3972 | cnteny
|
---|
3973 | \emph default
|
---|
3974 | ' displays a list of heavy atoms in molecule '
|
---|
3975 | \emph on
|
---|
3976 | nml
|
---|
3977 | \emph default
|
---|
3978 | ' that have a contact energy of more than 2 kcal/mol.
|
---|
3979 | If one sets the parameter '
|
---|
3980 | \emph on
|
---|
3981 | ieyel = 0
|
---|
3982 | \emph default
|
---|
3983 | ' in '
|
---|
3984 | \emph on
|
---|
3985 | cnteny
|
---|
3986 | \emph default
|
---|
3987 | ' the the contact energy is calculated with the van-der-Waals energy term,
|
---|
3988 | only.
|
---|
3989 | Setting '
|
---|
3990 | \emph on
|
---|
3991 | ieyel = 1
|
---|
3992 | \emph default
|
---|
3993 | ' additionally includes the electrostatic energy into the contact energy,
|
---|
3994 | and bad contacts are displayed if this energy exceeds a value of 10 kcal/mol
|
---|
3995 | for an atom.
|
---|
3996 |
|
---|
3997 | \end_layout
|
---|
3998 |
|
---|
3999 | \begin_layout Subsubsection
|
---|
4000 | Functions ENERGY
|
---|
4001 | \begin_inset LatexCommand index
|
---|
4002 | name "ENERGY"
|
---|
4003 |
|
---|
4004 | \end_inset
|
---|
4005 |
|
---|
4006 | , ENYSHE
|
---|
4007 | \begin_inset LatexCommand index
|
---|
4008 | name "ENYSHE"
|
---|
4009 |
|
---|
4010 | \end_inset
|
---|
4011 |
|
---|
4012 | , ENYFLX
|
---|
4013 | \begin_inset LatexCommand index
|
---|
4014 | name "ENYFLX"
|
---|
4015 |
|
---|
4016 | \end_inset
|
---|
4017 |
|
---|
4018 | , ENYSOL
|
---|
4019 | \begin_inset LatexCommand index
|
---|
4020 | name "ENYSOL"
|
---|
4021 |
|
---|
4022 | \end_inset
|
---|
4023 |
|
---|
4024 | , ESOLAN
|
---|
4025 | \begin_inset LatexCommand index
|
---|
4026 | name "ESOLAN"
|
---|
4027 |
|
---|
4028 | \end_inset
|
---|
4029 |
|
---|
4030 | , and ENYREG
|
---|
4031 | \begin_inset LatexCommand index
|
---|
4032 | name "ENYREG"
|
---|
4033 |
|
---|
4034 | \end_inset
|
---|
4035 |
|
---|
4036 | :
|
---|
4037 | \end_layout
|
---|
4038 |
|
---|
4039 | \begin_layout Standard
|
---|
4040 | (Usage:
|
---|
4041 | \shape italic
|
---|
4042 | eny = energy()
|
---|
4043 | \shape default
|
---|
4044 | )
|
---|
4045 | \newline
|
---|
4046 | The real*8 function `
|
---|
4047 | \shape italic
|
---|
4048 | energy
|
---|
4049 | \shape default
|
---|
4050 | ' is a wrapping function that calculates the energy of a given configuration.
|
---|
4051 | Depending on the choice of parameters '
|
---|
4052 | \shape italic
|
---|
4053 | flex
|
---|
4054 | \shape default
|
---|
4055 | ', '
|
---|
4056 | \shape italic
|
---|
4057 | sh2
|
---|
4058 | \shape default
|
---|
4059 | ', '
|
---|
4060 | \shape italic
|
---|
4061 | itysol
|
---|
4062 | \shape default
|
---|
4063 | ' and '
|
---|
4064 | \shape italic
|
---|
4065 | ireg
|
---|
4066 | \shape default
|
---|
4067 | ' in '
|
---|
4068 | \shape italic
|
---|
4069 | main
|
---|
4070 | \shape default
|
---|
4071 | ' ('
|
---|
4072 | \shape italic
|
---|
4073 | pmain
|
---|
4074 | \shape default
|
---|
4075 | ') the `vacuum' energy of the protein is calculated by the functions '
|
---|
4076 | \shape italic
|
---|
4077 | enyshe
|
---|
4078 | \shape default
|
---|
4079 | ' (ECEPP/2 or ECEPP/3), or '
|
---|
4080 | \shape italic
|
---|
4081 | enyflex
|
---|
4082 | \shape default
|
---|
4083 | ' (FLEX), and the solvation energy using the solvent accessible area method
|
---|
4084 | with '
|
---|
4085 | \shape italic
|
---|
4086 | enysol
|
---|
4087 | \shape default
|
---|
4088 | ' (approximate, but fast estimation of the solvated area) or '
|
---|
4089 | \shape italic
|
---|
4090 | esolan
|
---|
4091 | \shape default
|
---|
4092 | ' (analytical, but slower calculation of the area).
|
---|
4093 | '
|
---|
4094 | \shape italic
|
---|
4095 | enyreg
|
---|
4096 | \shape default
|
---|
4097 | ' calculates the constraint energy term needed during regularization of
|
---|
4098 | PDB-structures.
|
---|
4099 | '
|
---|
4100 | \shape italic
|
---|
4101 | energy
|
---|
4102 | \shape default
|
---|
4103 | ' returns the sum of these energy terms as selected by the parameters in
|
---|
4104 | the 'main'-module.
|
---|
4105 |
|
---|
4106 | \end_layout
|
---|
4107 |
|
---|
4108 | \begin_layout Subsubsection
|
---|
4109 | Subroutine GRADIENT
|
---|
4110 | \begin_inset LatexCommand index
|
---|
4111 | name "GRADIENT"
|
---|
4112 |
|
---|
4113 | \end_inset
|
---|
4114 |
|
---|
4115 | , OPESHE
|
---|
4116 | \begin_inset LatexCommand index
|
---|
4117 | name "OPESHE"
|
---|
4118 |
|
---|
4119 | \end_inset
|
---|
4120 |
|
---|
4121 | , OPEFLX
|
---|
4122 | \begin_inset LatexCommand index
|
---|
4123 | name "OPEFLX"
|
---|
4124 |
|
---|
4125 | \end_inset
|
---|
4126 |
|
---|
4127 | , OPESOL
|
---|
4128 | \begin_inset LatexCommand index
|
---|
4129 | name "OPESOL"
|
---|
4130 |
|
---|
4131 | \end_inset
|
---|
4132 |
|
---|
4133 | , and OPEREG
|
---|
4134 | \begin_inset LatexCommand index
|
---|
4135 | name "OPEREG"
|
---|
4136 |
|
---|
4137 | \end_inset
|
---|
4138 |
|
---|
4139 | :
|
---|
4140 | \end_layout
|
---|
4141 |
|
---|
4142 | \begin_layout Standard
|
---|
4143 | (Usage:
|
---|
4144 | \shape italic
|
---|
4145 | call gradient()
|
---|
4146 | \shape default
|
---|
4147 | )
|
---|
4148 | \newline
|
---|
4149 | The wrapping subroutine '
|
---|
4150 | \shape italic
|
---|
4151 | gradient
|
---|
4152 | \shape default
|
---|
4153 | ' calculates the energy and partial derivatives (with respect to internal
|
---|
4154 | degrees of freedom) for a given protein configuration.
|
---|
4155 | Depending on the choice of parameters '
|
---|
4156 | \shape italic
|
---|
4157 | flex
|
---|
4158 | \shape default
|
---|
4159 | ', '
|
---|
4160 | \shape italic
|
---|
4161 | sh2
|
---|
4162 | \shape default
|
---|
4163 | ', '
|
---|
4164 | \shape italic
|
---|
4165 | itysol
|
---|
4166 | \shape default
|
---|
4167 | ', and '
|
---|
4168 | \shape italic
|
---|
4169 | ireg
|
---|
4170 | \shape default
|
---|
4171 | ', the subroutines '
|
---|
4172 | \shape italic
|
---|
4173 | opeshe
|
---|
4174 | \shape default
|
---|
4175 | ' (ECEPP/2 or ECEPP/3), '
|
---|
4176 | \shape italic
|
---|
4177 | opeflx
|
---|
4178 | \shape default
|
---|
4179 | ' (FLEX), '
|
---|
4180 | \shape italic
|
---|
4181 | opesol
|
---|
4182 | \shape default
|
---|
4183 | ' (solvent accessible surface area) and/or '
|
---|
4184 | \shape italic
|
---|
4185 | opereg
|
---|
4186 | \shape default
|
---|
4187 | ' (constraint energy term during regularization of PDB structures) are selected
|
---|
4188 | and contribute to the total energy and its gradient that is calculated.
|
---|
4189 |
|
---|
4190 | \end_layout
|
---|
4191 |
|
---|
4192 | \begin_layout Subsubsection
|
---|
4193 | \begin_inset LatexCommand label
|
---|
4194 | name "ite:Subroutine-HBOND"
|
---|
4195 |
|
---|
4196 | \end_inset
|
---|
4197 |
|
---|
4198 | Subroutine HBOND
|
---|
4199 | \begin_inset LatexCommand index
|
---|
4200 | name "HBOND"
|
---|
4201 |
|
---|
4202 | \end_inset
|
---|
4203 |
|
---|
4204 |
|
---|
4205 | \end_layout
|
---|
4206 |
|
---|
4207 | \begin_layout Standard
|
---|
4208 | (Usage:
|
---|
4209 | \shape italic
|
---|
4210 | call hbond(nml,mhb,ipr)
|
---|
4211 | \shape default
|
---|
4212 | ):
|
---|
4213 | \newline
|
---|
4214 | This subroutine determines the number 'mhb' of the hydrogen bonds for
|
---|
4215 | the current conformation of the molecule and requires 'nml' as input -
|
---|
4216 | the index of the present molecule.
|
---|
4217 | The hydrogen bonds are printed out for '
|
---|
4218 | \begin_inset Formula $ipr>0$
|
---|
4219 | \end_inset
|
---|
4220 |
|
---|
4221 | '.
|
---|
4222 |
|
---|
4223 | \end_layout
|
---|
4224 |
|
---|
4225 | \begin_layout Subsubsection
|
---|
4226 | \begin_inset LatexCommand label
|
---|
4227 | name "ite:subroutine-HELIX"
|
---|
4228 |
|
---|
4229 | \end_inset
|
---|
4230 |
|
---|
4231 | subroutine HELIX
|
---|
4232 | \begin_inset LatexCommand index
|
---|
4233 | name "HELIX"
|
---|
4234 |
|
---|
4235 | \end_inset
|
---|
4236 |
|
---|
4237 |
|
---|
4238 | \end_layout
|
---|
4239 |
|
---|
4240 | \begin_layout Standard
|
---|
4241 | (Usage:
|
---|
4242 | \shape italic
|
---|
4243 | helix(nhel,mhel,nbet,mbet)
|
---|
4244 | \shape default
|
---|
4245 | ):
|
---|
4246 | \newline
|
---|
4247 | HELIX determines whether a residue is part of an
|
---|
4248 | \begin_inset Formula $\alpha$
|
---|
4249 | \end_inset
|
---|
4250 |
|
---|
4251 | -helix or
|
---|
4252 | \begin_inset Formula $\beta$
|
---|
4253 | \end_inset
|
---|
4254 |
|
---|
4255 | -sheet according to its backbone dihedral angles (
|
---|
4256 | \begin_inset Formula $\phi,\psi$
|
---|
4257 | \end_inset
|
---|
4258 |
|
---|
4259 | ) (ranges defined in a PARAMETER statement) and returnes the number of helical
|
---|
4260 | residues 'nhel', the number of helical segments 'mhel', and the corresponding
|
---|
4261 | quantities for
|
---|
4262 | \begin_inset Formula $\beta$
|
---|
4263 | \end_inset
|
---|
4264 |
|
---|
4265 | -strand elements 'nbet' and 'mbet'.
|
---|
4266 |
|
---|
4267 | \end_layout
|
---|
4268 |
|
---|
4269 | \begin_layout Subsubsection
|
---|
4270 | \begin_inset LatexCommand label
|
---|
4271 | name "ite:Subroutine-METROPOLIS"
|
---|
4272 |
|
---|
4273 | \end_inset
|
---|
4274 |
|
---|
4275 | Subroutine METROPOLIS
|
---|
4276 | \begin_inset LatexCommand index
|
---|
4277 | name "METROPOLIS"
|
---|
4278 |
|
---|
4279 | \end_inset
|
---|
4280 |
|
---|
4281 |
|
---|
4282 | \end_layout
|
---|
4283 |
|
---|
4284 | \begin_layout Standard
|
---|
4285 | (Usage:
|
---|
4286 | \shape italic
|
---|
4287 | call metropolis(eol,acz,weight)
|
---|
4288 | \shape default
|
---|
4289 | ):
|
---|
4290 | \newline
|
---|
4291 | The subroutine implements one Metropolis move for every dihedral angle
|
---|
4292 | and requires as input a weight function '
|
---|
4293 | \shape italic
|
---|
4294 | weight(eol)
|
---|
4295 | \shape default
|
---|
4296 | ' and the energy 'eol' of the present configuration.
|
---|
4297 | It returns in the variable 'eol' the energy of the configuration after
|
---|
4298 | 'nvr' (the number of non-fixed dihedral angles) updates.
|
---|
4299 | 'acz' accounts for the number of Metropolis moves were the proposed configurati
|
---|
4300 | on was accepted.
|
---|
4301 |
|
---|
4302 | \end_layout
|
---|
4303 |
|
---|
4304 | \begin_layout Subsubsection
|
---|
4305 | Subroutine OUTPDB
|
---|
4306 | \begin_inset LatexCommand index
|
---|
4307 | name "OUTPDB"
|
---|
4308 |
|
---|
4309 | \end_inset
|
---|
4310 |
|
---|
4311 |
|
---|
4312 | \end_layout
|
---|
4313 |
|
---|
4314 | \begin_layout Standard
|
---|
4315 | (Usage:
|
---|
4316 | \shape italic
|
---|
4317 | call outpdb(nml,pdbFileName)
|
---|
4318 | \shape default
|
---|
4319 | ):
|
---|
4320 | \newline
|
---|
4321 | The subroutine writes in the output file the coordinates of the atoms
|
---|
4322 | of given molecule.
|
---|
4323 | The format is compatible with the standard data representation format of
|
---|
4324 | the Brookhaven Protein Data bank.
|
---|
4325 | This subroutine requires as input the index 'nml' of the given molecule
|
---|
4326 | and the file name of the output-file.
|
---|
4327 | If nml=0, the configuration for all molecules in the system is written
|
---|
4328 | to a multi-model pdb file.
|
---|
4329 | \end_layout
|
---|
4330 |
|
---|
4331 | \begin_layout Subsubsection
|
---|
4332 | Subroutine OUTVAR
|
---|
4333 | \begin_inset LatexCommand index
|
---|
4334 | name "OUTVAR"
|
---|
4335 |
|
---|
4336 | \end_inset
|
---|
4337 |
|
---|
4338 |
|
---|
4339 | \end_layout
|
---|
4340 |
|
---|
4341 | \begin_layout Standard
|
---|
4342 | (Usage:
|
---|
4343 | \shape italic
|
---|
4344 | call outvar(nml, filename)
|
---|
4345 | \shape default
|
---|
4346 | ):
|
---|
4347 | \end_layout
|
---|
4348 |
|
---|
4349 | \begin_layout Standard
|
---|
4350 | This subroutine writes the dihedral angles of the current configuration
|
---|
4351 | of molecule '
|
---|
4352 | \shape italic
|
---|
4353 | nml
|
---|
4354 | \shape default
|
---|
4355 | ' to either standard output ('filename =
|
---|
4356 | \begin_inset Quotes eld
|
---|
4357 | \end_inset
|
---|
4358 |
|
---|
4359 |
|
---|
4360 | \begin_inset Quotes eld
|
---|
4361 | \end_inset
|
---|
4362 |
|
---|
4363 | ') or a dedicated file, where filename is the name of the file).
|
---|
4364 | The dihedral angles are written out in a form that allows to use them as
|
---|
4365 | configuration input file for SMMP.
|
---|
4366 | If nml=0, the configuration for all molecules in the system is printed.
|
---|
4367 |
|
---|
4368 | \end_layout
|
---|
4369 |
|
---|
4370 | \begin_layout Subsubsection
|
---|
4371 | Function grnd() and subroutine sgrnd(seed):
|
---|
4372 | \end_layout
|
---|
4373 |
|
---|
4374 | \begin_layout Standard
|
---|
4375 | Our package includes an implementation of the twister-mersenne random generator.
|
---|
4376 | Initialize the random number generator using
|
---|
4377 | \emph on
|
---|
4378 | call sgrnd(seed)
|
---|
4379 | \emph default
|
---|
4380 | , where
|
---|
4381 | \emph on
|
---|
4382 | seed
|
---|
4383 | \emph default
|
---|
4384 | is an integer.
|
---|
4385 | Each call off
|
---|
4386 | \emph on
|
---|
4387 | grnd()
|
---|
4388 | \emph default
|
---|
4389 | returns a new random number between 0 and 1 taken from a uniform distribution.
|
---|
4390 | \end_layout
|
---|
4391 |
|
---|
4392 | \begin_layout Subsubsection
|
---|
4393 | \begin_inset LatexCommand label
|
---|
4394 | name "ite:Subroutine-RGYR"
|
---|
4395 |
|
---|
4396 | \end_inset
|
---|
4397 |
|
---|
4398 | Subroutine RGYR
|
---|
4399 | \end_layout
|
---|
4400 |
|
---|
4401 | \begin_layout Standard
|
---|
4402 | (Usage:
|
---|
4403 | \shape italic
|
---|
4404 | call rgyr(nml,rgy,ee)
|
---|
4405 | \shape default
|
---|
4406 | ):
|
---|
4407 | \newline
|
---|
4408 | This subroutine calculates the radius-of-gyration 'rgy' and the end-to-end
|
---|
4409 | distance 'ee' for the protein molecule 'nml'.
|
---|
4410 | Both quantities characterize the compactness of a protein conformation.
|
---|
4411 |
|
---|
4412 | \end_layout
|
---|
4413 |
|
---|
4414 | \begin_layout Subsubsection
|
---|
4415 | Function RMSDFUN
|
---|
4416 | \begin_inset LatexCommand index
|
---|
4417 | name "RMSDFUN"
|
---|
4418 |
|
---|
4419 | \end_inset
|
---|
4420 |
|
---|
4421 |
|
---|
4422 | \end_layout
|
---|
4423 |
|
---|
4424 | \begin_layout Standard
|
---|
4425 | (Usage:
|
---|
4426 | \shape italic
|
---|
4427 | rmsd = rmsdfun(nml,ir1,ir2,ixat,xrf,yrf,zrf,isl)
|
---|
4428 | \shape default
|
---|
4429 | )
|
---|
4430 | \newline
|
---|
4431 | The real*8 function '
|
---|
4432 | \shape italic
|
---|
4433 | rmsdfun
|
---|
4434 | \shape default
|
---|
4435 | ' calculates the root-mean square-deviation (rmsd) between atom postions
|
---|
4436 | in the current configuration of molecule '
|
---|
4437 | \shape italic
|
---|
4438 | nml
|
---|
4439 | \shape default
|
---|
4440 | ' for a range of residues '
|
---|
4441 | \shape italic
|
---|
4442 | [ir1,ir2]
|
---|
4443 | \shape default
|
---|
4444 | ' and a reference structure given by arrays of atom coordinates '
|
---|
4445 | \shape italic
|
---|
4446 | xrf,yrf,zrf
|
---|
4447 | \shape default
|
---|
4448 | '.
|
---|
4449 | For each atom position in the current SMMP-structure the array '
|
---|
4450 | \shape italic
|
---|
4451 | ixat
|
---|
4452 | \shape default
|
---|
4453 | ' provides the index of the equivalent atom in the reference structure,
|
---|
4454 | or yields a value of '
|
---|
4455 | \shape italic
|
---|
4456 | 0
|
---|
4457 | \shape default
|
---|
4458 | ' if there is no equivalent.
|
---|
4459 | By setting '
|
---|
4460 | \shape italic
|
---|
4461 | isl=0
|
---|
4462 | \shape default
|
---|
4463 | ' the rmsd is calculated over all non-hydrogen (heavy) atoms, for '
|
---|
4464 | \shape italic
|
---|
4465 | isl = 1
|
---|
4466 | \shape default
|
---|
4467 | ' for backbone atoms only, and for '
|
---|
4468 | \shape italic
|
---|
4469 | isl = 2
|
---|
4470 | \shape default
|
---|
4471 | ' the rmsd is calculated only between C
|
---|
4472 | \begin_inset Formula $^{\alpha}$
|
---|
4473 | \end_inset
|
---|
4474 |
|
---|
4475 | -atoms.
|
---|
4476 | The routine '
|
---|
4477 | \shape italic
|
---|
4478 | rmsdfun
|
---|
4479 | \shape default
|
---|
4480 | ' may only be called
|
---|
4481 | \series bold
|
---|
4482 | after
|
---|
4483 | \series default
|
---|
4484 | an initial call of the subroutine '
|
---|
4485 | \shape italic
|
---|
4486 | rmsinit(nml,string)
|
---|
4487 | \shape default
|
---|
4488 | '.
|
---|
4489 | If
|
---|
4490 | \shape italic
|
---|
4491 | string = 'smmp'
|
---|
4492 | \shape default
|
---|
4493 | the reference configuration is a SMMP configuration, otherwise it is read
|
---|
4494 | in from a PDB-file which name given by '
|
---|
4495 | \shape italic
|
---|
4496 | string
|
---|
4497 | \shape default
|
---|
4498 | '.
|
---|
4499 |
|
---|
4500 | \end_layout
|
---|
4501 |
|
---|
4502 | \begin_layout Subsubsection
|
---|
4503 | Subroutine ZIMMER
|
---|
4504 | \begin_inset LatexCommand index
|
---|
4505 | name "ZIMMER"
|
---|
4506 |
|
---|
4507 | \end_inset
|
---|
4508 |
|
---|
4509 |
|
---|
4510 | \end_layout
|
---|
4511 |
|
---|
4512 | \begin_layout Standard
|
---|
4513 | (Usage:
|
---|
4514 | \shape italic
|
---|
4515 | call zimmer(nresi)
|
---|
4516 | \shape default
|
---|
4517 | ):
|
---|
4518 | \newline
|
---|
4519 | This subroutine analyzes the backbone dihedrals of a given conformation
|
---|
4520 | and characterizes the state of each pair of (
|
---|
4521 | \begin_inset Formula $\phi,\psi$
|
---|
4522 | \end_inset
|
---|
4523 |
|
---|
4524 | ) by its Zimmerman code.
|
---|
4525 | The subroutine requires as input the number of residues 'nresi' and returns
|
---|
4526 | the character string 'zimm' with the Zimmerman code of the present configuratio
|
---|
4527 | n (through a common block).
|
---|
4528 |
|
---|
4529 | \end_layout
|
---|
4530 |
|
---|
4531 | \begin_layout Section
|
---|
4532 | How to cite SMMP
|
---|
4533 | \end_layout
|
---|
4534 |
|
---|
4535 | \begin_layout Standard
|
---|
4536 | Use of SMMP should be acknowledged by quoting the following reference: F.
|
---|
4537 | Eisenmenger, U.H.E.
|
---|
4538 | Hansmann, Sh.
|
---|
4539 | Hayryan, C.-K.
|
---|
4540 | Hu,
|
---|
4541 | \series bold
|
---|
4542 | [SMMP] A Modern Package for Simulation of Proteins
|
---|
4543 | \series default
|
---|
4544 | ,
|
---|
4545 | \shape italic
|
---|
4546 | Comp.
|
---|
4547 | Phys.
|
---|
4548 | Comm.
|
---|
4549 |
|
---|
4550 | \shape default
|
---|
4551 |
|
---|
4552 | \series bold
|
---|
4553 | 138
|
---|
4554 | \series default
|
---|
4555 | (2001) 192-212;
|
---|
4556 | \newline
|
---|
4557 | F.
|
---|
4558 | Eisenmenger, U.H.E.
|
---|
4559 | Hansmann, Sh.
|
---|
4560 | Hayryan, C.-K.
|
---|
4561 | Hu,
|
---|
4562 | \series bold
|
---|
4563 | An Enhanced Version of SMMP - Open-Source Software Package for Simulation
|
---|
4564 | of Proteins
|
---|
4565 | \series default
|
---|
4566 | ,
|
---|
4567 | \shape italic
|
---|
4568 | Comp.Phys.
|
---|
4569 | Comm.
|
---|
4570 | 174 (2006) 422-
|
---|
4571 | \shape default
|
---|
4572 | 429;
|
---|
4573 | \newline
|
---|
4574 |
|
---|
4575 | \emph on
|
---|
4576 | J.
|
---|
4577 | H.
|
---|
4578 | Meinke, S.
|
---|
4579 | Mohanty, F.
|
---|
4580 | Eisenmenger and U.H.E.
|
---|
4581 | Hansmann,
|
---|
4582 | \series bold
|
---|
4583 | \emph default
|
---|
4584 | SMMP v.
|
---|
4585 | 3.0 --- Simulating proteins and protein interactions in Python and Fortran
|
---|
4586 | \series default
|
---|
4587 | , submitted to
|
---|
4588 | \emph on
|
---|
4589 | Comp.\InsetSpace ~
|
---|
4590 | Phys.\InsetSpace ~
|
---|
4591 | Comm.
|
---|
4592 | \newline
|
---|
4593 |
|
---|
4594 | \emph default
|
---|
4595 | Where appropriate, the program package's web-site should be quoted as:
|
---|
4596 | \series bold
|
---|
4597 | SMMP,
|
---|
4598 | \begin_inset LatexCommand url
|
---|
4599 | target "http://www.phy.mtu.edu/biophys/smmp.htm"
|
---|
4600 |
|
---|
4601 | \end_inset
|
---|
4602 |
|
---|
4603 | or
|
---|
4604 | \series default
|
---|
4605 |
|
---|
4606 | \begin_inset LatexCommand url
|
---|
4607 | target "http://www.smmp05.net"
|
---|
4608 |
|
---|
4609 | \end_inset
|
---|
4610 |
|
---|
4611 | .
|
---|
4612 |
|
---|
4613 | \end_layout
|
---|
4614 |
|
---|
4615 | \begin_layout Section
|
---|
4616 | Examples
|
---|
4617 | \begin_inset LatexCommand label
|
---|
4618 | name "sec:Examples"
|
---|
4619 |
|
---|
4620 | \end_inset
|
---|
4621 |
|
---|
4622 |
|
---|
4623 | \end_layout
|
---|
4624 |
|
---|
4625 | \begin_layout Standard
|
---|
4626 | All the examples can be found in the EXAMPLES subdirectory and should be
|
---|
4627 | run from there.
|
---|
4628 | All the serial examples can be built either from the top-level directory
|
---|
4629 | with
|
---|
4630 | \emph on
|
---|
4631 | make examples
|
---|
4632 | \emph default
|
---|
4633 | or from within the EXAMPLES directory with
|
---|
4634 | \emph on
|
---|
4635 | make
|
---|
4636 | \emph default
|
---|
4637 | .
|
---|
4638 | The MPI parallel tempering example is built from within the EXAMPLES directory
|
---|
4639 | with
|
---|
4640 | \emph on
|
---|
4641 | make parallel_tempering_p.
|
---|
4642 |
|
---|
4643 | \emph default
|
---|
4644 | The structure of all examples is very similar to Listing
|
---|
4645 | \begin_inset LatexCommand ref
|
---|
4646 | reference "listing:mainmc"
|
---|
4647 |
|
---|
4648 | \end_inset
|
---|
4649 |
|
---|
4650 | .
|
---|
4651 | We first initialize the force field we want to use, load the protein either
|
---|
4652 | from a sequence and a configuration file or from a PDB file, set the simulation
|
---|
4653 | parameters, and finally call the simulation subroutine.
|
---|
4654 | We use
|
---|
4655 | \shape italic
|
---|
4656 | \emph on
|
---|
4657 |
|
---|
4658 | \emph default
|
---|
4659 | grpn = 'nh2', grpc = 'cooh'
|
---|
4660 | \emph on
|
---|
4661 | as end groups in all of our examples.
|
---|
4662 | We also use a fixed value for the dielectric constant, so that
|
---|
4663 | \emph default
|
---|
4664 | epsd=.false.
|
---|
4665 |
|
---|
4666 | \emph on
|
---|
4667 | in all cases.
|
---|
4668 | \end_layout
|
---|
4669 |
|
---|
4670 | \begin_layout Standard
|
---|
4671 | The first example
|
---|
4672 | \begin_inset LatexCommand eqref
|
---|
4673 | reference "sub:Minimization-of-vacuum"
|
---|
4674 |
|
---|
4675 | \end_inset
|
---|
4676 |
|
---|
4677 | minimizes the energy of met-enkaphalin, a small endorphin with only 5 amino
|
---|
4678 | acids using a quasi-newton minimizer.
|
---|
4679 | The second examples
|
---|
4680 | \begin_inset LatexCommand eqref
|
---|
4681 | reference "sub:Structure-Determination-by"
|
---|
4682 |
|
---|
4683 | \end_inset
|
---|
4684 |
|
---|
4685 | tries to find the minimum vacuum energy structure of met-enkaphalin using
|
---|
4686 | simulated annealing.
|
---|
4687 | The third example
|
---|
4688 | \begin_inset LatexCommand eqref
|
---|
4689 | reference "sub:Calculation-of-Multicanonical"
|
---|
4690 |
|
---|
4691 | \end_inset
|
---|
4692 |
|
---|
4693 | shows how to calculate the estmated weights necessary for a multi-canonical
|
---|
4694 | Monte Carlo simulation.
|
---|
4695 | Met-enkaphalin again serves as sample system.
|
---|
4696 | In
|
---|
4697 | \begin_inset LatexCommand eqref
|
---|
4698 | reference "sub:Regularization-of-the"
|
---|
4699 |
|
---|
4700 | \end_inset
|
---|
4701 |
|
---|
4702 | we show how to regularize an experimental structure read from a PDB file.
|
---|
4703 | The force fields implemented use fixed bond lengths and valence angles.
|
---|
4704 | Without regularization, a structure read from a PDB file often has an unreasona
|
---|
4705 | bly high energy.
|
---|
4706 | Finally, we show how to perform parallel tempering simulations on multiple
|
---|
4707 | processors
|
---|
4708 | \begin_inset LatexCommand eqref
|
---|
4709 | reference "sub:Parallel-Tempering-simulation"
|
---|
4710 |
|
---|
4711 | \end_inset
|
---|
4712 |
|
---|
4713 | and on a single processor
|
---|
4714 | \begin_inset LatexCommand eqref
|
---|
4715 | reference "sub:Parallel-tempering-on"
|
---|
4716 |
|
---|
4717 | \end_inset
|
---|
4718 |
|
---|
4719 | .
|
---|
4720 | The sample output was generated on a system with two dual-core AMD Opteron
|
---|
4721 | 2216 processor running SUSE LINUX 10.1 (X86-64).
|
---|
4722 | The programs were compiled with Intels Fortran compiler with optimization
|
---|
4723 | set to -O2.
|
---|
4724 | \end_layout
|
---|
4725 |
|
---|
4726 | \begin_layout Subsection
|
---|
4727 | Minimization of vacuum energy from a given configuration
|
---|
4728 | \begin_inset LatexCommand label
|
---|
4729 | name "sub:Minimization-of-vacuum"
|
---|
4730 |
|
---|
4731 | \end_inset
|
---|
4732 |
|
---|
4733 |
|
---|
4734 | \end_layout
|
---|
4735 |
|
---|
4736 | \begin_layout Standard
|
---|
4737 | The MAIN module in minimization.f, has the following settings:
|
---|
4738 | \newline
|
---|
4739 |
|
---|
4740 | \shape italic
|
---|
4741 | \emph on
|
---|
4742 | ientyp = 0
|
---|
4743 | \newline
|
---|
4744 | sh2 = .false.
|
---|
4745 |
|
---|
4746 | \newline
|
---|
4747 | itysol = 0
|
---|
4748 | \newline
|
---|
4749 | iabin = 1
|
---|
4750 | \shape default
|
---|
4751 | ,
|
---|
4752 | \newline
|
---|
4753 |
|
---|
4754 | \emph default
|
---|
4755 |
|
---|
4756 | \newline
|
---|
4757 | which restrict energy calculations to evaluation of the ECEPP/3 energy
|
---|
4758 | (no protein-solvent interactions taken into account), choses
|
---|
4759 | \shape italic
|
---|
4760 | nh2
|
---|
4761 | \shape default
|
---|
4762 | as N-terminal group and at the C-terminus the
|
---|
4763 | \shape italic
|
---|
4764 | cooh
|
---|
4765 | \shape default
|
---|
4766 | -group, and the input is read from a sequence/configuration file.
|
---|
4767 | The simulation task subroutine is called with
|
---|
4768 | \newline
|
---|
4769 | imin = 1
|
---|
4770 | \newline
|
---|
4771 | maxit=10000
|
---|
4772 | \newline
|
---|
4773 | eps=1.0d-9
|
---|
4774 | \newline
|
---|
4775 |
|
---|
4776 | \shape italic
|
---|
4777 | call minim(imin,mait,eps)
|
---|
4778 | \shape default
|
---|
4779 | ,
|
---|
4780 | \newline
|
---|
4781 | i.e.
|
---|
4782 | the simulation task is the local minimization of the vacuum energy of a
|
---|
4783 | configuration using the Quasi-Newton algorithm.
|
---|
4784 | Compile the program with
|
---|
4785 | \emph on
|
---|
4786 | make minimization
|
---|
4787 | \emph default
|
---|
4788 | , SMMP with this default settings will minimize the configuration given
|
---|
4789 | in
|
---|
4790 | \shape italic
|
---|
4791 | enkefa.var
|
---|
4792 | \shape default
|
---|
4793 | .
|
---|
4794 | Running minimization from the EXAMPLES directory will lead to the following
|
---|
4795 | output:
|
---|
4796 | \begin_inset ERT
|
---|
4797 | status open
|
---|
4798 |
|
---|
4799 | \begin_layout Standard
|
---|
4800 |
|
---|
4801 |
|
---|
4802 | \backslash
|
---|
4803 | begin{verbatim}
|
---|
4804 | \end_layout
|
---|
4805 |
|
---|
4806 | \begin_layout Standard
|
---|
4807 |
|
---|
4808 | init_energy: itysol = 0
|
---|
4809 | \end_layout
|
---|
4810 |
|
---|
4811 | \begin_layout Standard
|
---|
4812 |
|
---|
4813 | init_energy: esol_scaling = F
|
---|
4814 | \end_layout
|
---|
4815 |
|
---|
4816 | \begin_layout Standard
|
---|
4817 |
|
---|
4818 | init_molecule: Solvent: 0
|
---|
4819 | \end_layout
|
---|
4820 |
|
---|
4821 | \begin_layout Standard
|
---|
4822 |
|
---|
4823 | File with sequence is enkefa.seq
|
---|
4824 | \end_layout
|
---|
4825 |
|
---|
4826 | \begin_layout Standard
|
---|
4827 |
|
---|
4828 | addend> Net charge of molecule # 1: 0.001
|
---|
4829 | \end_layout
|
---|
4830 |
|
---|
4831 | \begin_layout Standard
|
---|
4832 |
|
---|
4833 | \end_layout
|
---|
4834 |
|
---|
4835 | \begin_layout Standard
|
---|
4836 |
|
---|
4837 | enkefa.var
|
---|
4838 | \end_layout
|
---|
4839 |
|
---|
4840 | \begin_layout Standard
|
---|
4841 |
|
---|
4842 | \end_layout
|
---|
4843 |
|
---|
4844 | \begin_layout Standard
|
---|
4845 |
|
---|
4846 | redvar> Met-Enkephalin: residue 1 Tyr : x1 set -172.590
|
---|
4847 | \end_layout
|
---|
4848 |
|
---|
4849 | \begin_layout Standard
|
---|
4850 |
|
---|
4851 | redvar> Met-Enkephalin: residue 1 Tyr : x2 set 78.710
|
---|
4852 | \end_layout
|
---|
4853 |
|
---|
4854 | \begin_layout Standard
|
---|
4855 |
|
---|
4856 | redvar> Met-Enkephalin: residue 1 Tyr : x6 set -165.880
|
---|
4857 | \end_layout
|
---|
4858 |
|
---|
4859 | \begin_layout Standard
|
---|
4860 |
|
---|
4861 | redvar> Met-Enkephalin: residue 1 Tyr : phi set -86.240
|
---|
4862 | \end_layout
|
---|
4863 |
|
---|
4864 | \begin_layout Standard
|
---|
4865 |
|
---|
4866 | redvar> Met-Enkephalin: residue 2 Gly : psi set 156.180
|
---|
4867 | \end_layout
|
---|
4868 |
|
---|
4869 | \begin_layout Standard
|
---|
4870 |
|
---|
4871 | redvar> Met-Enkephalin: residue 2 Gly : omg set -180.000
|
---|
4872 | \end_layout
|
---|
4873 |
|
---|
4874 | \begin_layout Standard
|
---|
4875 |
|
---|
4876 | redvar> Met-Enkephalin: residue 2 Gly : phi set -154.530
|
---|
4877 | \end_layout
|
---|
4878 |
|
---|
4879 | \begin_layout Standard
|
---|
4880 |
|
---|
4881 | redvar> Met-Enkephalin: residue 3 Gly : psi set 83.640
|
---|
4882 | \end_layout
|
---|
4883 |
|
---|
4884 | \begin_layout Standard
|
---|
4885 |
|
---|
4886 | redvar> Met-Enkephalin: residue 3 Gly : omg set 180.000
|
---|
4887 | \end_layout
|
---|
4888 |
|
---|
4889 | \begin_layout Standard
|
---|
4890 |
|
---|
4891 | redvar> Met-Enkephalin: residue 3 Gly : phi set 83.660
|
---|
4892 | \end_layout
|
---|
4893 |
|
---|
4894 | \begin_layout Standard
|
---|
4895 |
|
---|
4896 | redvar> Met-Enkephalin: residue 4 Phe : psi set -73.860
|
---|
4897 | \end_layout
|
---|
4898 |
|
---|
4899 | \begin_layout Standard
|
---|
4900 |
|
---|
4901 | redvar> Met-Enkephalin: residue 4 Phe : omg set -180.000
|
---|
4902 | \end_layout
|
---|
4903 |
|
---|
4904 | \begin_layout Standard
|
---|
4905 |
|
---|
4906 | redvar> Met-Enkephalin: residue 4 Phe : x1 set 58.790
|
---|
4907 | \end_layout
|
---|
4908 |
|
---|
4909 | \begin_layout Standard
|
---|
4910 |
|
---|
4911 | redvar> Met-Enkephalin: residue 4 Phe : x2 set 94.600
|
---|
4912 | \end_layout
|
---|
4913 |
|
---|
4914 | \begin_layout Standard
|
---|
4915 |
|
---|
4916 | redvar> Met-Enkephalin: residue 4 Phe : phi set -137.040
|
---|
4917 | \end_layout
|
---|
4918 |
|
---|
4919 | \begin_layout Standard
|
---|
4920 |
|
---|
4921 | redvar> Met-Enkephalin: residue 5 Met : psi set 19.330
|
---|
4922 | \end_layout
|
---|
4923 |
|
---|
4924 | \begin_layout Standard
|
---|
4925 |
|
---|
4926 | redvar> Met-Enkephalin: residue 5 Met : omg set -180.000
|
---|
4927 | \end_layout
|
---|
4928 |
|
---|
4929 | \begin_layout Standard
|
---|
4930 |
|
---|
4931 | redvar> Met-Enkephalin: residue 5 Met : x1 set 52.760
|
---|
4932 | \end_layout
|
---|
4933 |
|
---|
4934 | \begin_layout Standard
|
---|
4935 |
|
---|
4936 | redvar> Met-Enkephalin: residue 5 Met : x2 set 175.280
|
---|
4937 | \end_layout
|
---|
4938 |
|
---|
4939 | \begin_layout Standard
|
---|
4940 |
|
---|
4941 | redvar> Met-Enkephalin: residue 5 Met : x3 set -179.830
|
---|
4942 | \end_layout
|
---|
4943 |
|
---|
4944 | \begin_layout Standard
|
---|
4945 |
|
---|
4946 | redvar> Met-Enkephalin: residue 5 Met : x4 set -58.570
|
---|
4947 | \end_layout
|
---|
4948 |
|
---|
4949 | \begin_layout Standard
|
---|
4950 |
|
---|
4951 | redvar> Met-Enkephalin: residue 5 Met : phi set -163.630
|
---|
4952 | \end_layout
|
---|
4953 |
|
---|
4954 | \begin_layout Standard
|
---|
4955 |
|
---|
4956 | redvar> Met-Enkephalin: residue 5 Met : pst set 160.450
|
---|
4957 | \end_layout
|
---|
4958 |
|
---|
4959 | \begin_layout Standard
|
---|
4960 |
|
---|
4961 | redvar> Met-Enkephalin: residue 5 Met : omt set 180.000
|
---|
4962 | \end_layout
|
---|
4963 |
|
---|
4964 | \begin_layout Standard
|
---|
4965 |
|
---|
4966 | \end_layout
|
---|
4967 |
|
---|
4968 | \begin_layout Standard
|
---|
4969 |
|
---|
4970 | \end_layout
|
---|
4971 |
|
---|
4972 | \begin_layout Standard
|
---|
4973 |
|
---|
4974 | Energy BEFORE minimization:
|
---|
4975 | \end_layout
|
---|
4976 |
|
---|
4977 | \begin_layout Standard
|
---|
4978 |
|
---|
4979 | \end_layout
|
---|
4980 |
|
---|
4981 | \begin_layout Standard
|
---|
4982 |
|
---|
4983 | Total: 0.10354E+04
|
---|
4984 | \end_layout
|
---|
4985 |
|
---|
4986 | \begin_layout Standard
|
---|
4987 |
|
---|
4988 | Coulomb: 0.1991E+02 Lennard-Jones: 0.1142E+03 HB: 0.9008E+03
|
---|
4989 | \end_layout
|
---|
4990 |
|
---|
4991 | \begin_layout Standard
|
---|
4992 |
|
---|
4993 | Variables: 0.4511E+00 Solvatation: 0.0000E+00
|
---|
4994 | \end_layout
|
---|
4995 |
|
---|
4996 | \begin_layout Standard
|
---|
4997 |
|
---|
4998 | \end_layout
|
---|
4999 |
|
---|
5000 | \begin_layout Standard
|
---|
5001 |
|
---|
5002 | Step 1: energy 0.489976E+05 ( 0.867243E+13 )
|
---|
5003 | \end_layout
|
---|
5004 |
|
---|
5005 | \begin_layout Standard
|
---|
5006 |
|
---|
5007 | Step 2: energy 0.108241E+03 ( 0.964364E+07 )
|
---|
5008 | \end_layout
|
---|
5009 |
|
---|
5010 | \begin_layout Standard
|
---|
5011 |
|
---|
5012 | Step 3: energy -0.632755E+00 ( 0.498256E+04 )
|
---|
5013 | \end_layout
|
---|
5014 |
|
---|
5015 | \begin_layout Standard
|
---|
5016 |
|
---|
5017 | Step 4: energy -0.739539E+01 ( 0.109979E+05 )
|
---|
5018 | \end_layout
|
---|
5019 |
|
---|
5020 | \begin_layout Standard
|
---|
5021 |
|
---|
5022 | Step 5: energy 0.517957E+03 ( 0.678892E+09 )
|
---|
5023 | \end_layout
|
---|
5024 |
|
---|
5025 | \begin_layout Standard
|
---|
5026 |
|
---|
5027 | Step 6: energy -0.767774E+01 ( 0.143880E+05 )
|
---|
5028 | \end_layout
|
---|
5029 |
|
---|
5030 | \begin_layout Standard
|
---|
5031 |
|
---|
5032 | Step 7: energy -0.818570E+01 ( 0.100364E+05 )
|
---|
5033 | \end_layout
|
---|
5034 |
|
---|
5035 | \begin_layout Standard
|
---|
5036 |
|
---|
5037 | Step 8: energy -0.938401E+01 ( 0.172508E+04 )
|
---|
5038 | \end_layout
|
---|
5039 |
|
---|
5040 | \begin_layout Standard
|
---|
5041 |
|
---|
5042 | Step 9: energy -0.109799E+02 ( 0.105718E+04 )
|
---|
5043 | \end_layout
|
---|
5044 |
|
---|
5045 | \begin_layout Standard
|
---|
5046 |
|
---|
5047 | Step 10: energy -0.116244E+02 ( 0.580821E+03 )
|
---|
5048 | \end_layout
|
---|
5049 |
|
---|
5050 | \begin_layout Standard
|
---|
5051 |
|
---|
5052 | Step 11: energy -0.116969E+02 ( 0.145676E+04 )
|
---|
5053 | \end_layout
|
---|
5054 |
|
---|
5055 | \begin_layout Standard
|
---|
5056 |
|
---|
5057 | Step 12: energy -0.118569E+02 ( 0.856882E+03 )
|
---|
5058 | \end_layout
|
---|
5059 |
|
---|
5060 | \begin_layout Standard
|
---|
5061 |
|
---|
5062 | Step 13: energy -0.119576E+02 ( 0.521381E+03 )
|
---|
5063 | \end_layout
|
---|
5064 |
|
---|
5065 | \begin_layout Standard
|
---|
5066 |
|
---|
5067 | Step 14: energy -0.120897E+02 ( 0.398602E+03 )
|
---|
5068 | \end_layout
|
---|
5069 |
|
---|
5070 | \begin_layout Standard
|
---|
5071 |
|
---|
5072 | Step 15: energy -0.121476E+02 ( 0.222201E+03 )
|
---|
5073 | \end_layout
|
---|
5074 |
|
---|
5075 | \begin_layout Standard
|
---|
5076 |
|
---|
5077 | ...
|
---|
5078 | \end_layout
|
---|
5079 |
|
---|
5080 | \begin_layout Standard
|
---|
5081 |
|
---|
5082 | ...
|
---|
5083 | \end_layout
|
---|
5084 |
|
---|
5085 | \begin_layout Standard
|
---|
5086 |
|
---|
5087 | ...
|
---|
5088 | \end_layout
|
---|
5089 |
|
---|
5090 | \begin_layout Standard
|
---|
5091 |
|
---|
5092 | Step 70: energy -0.124285E+02 ( 0.194869E-04 )
|
---|
5093 | \end_layout
|
---|
5094 |
|
---|
5095 | \begin_layout Standard
|
---|
5096 |
|
---|
5097 | Step 71: energy -0.124285E+02 ( 0.120524E-04 )
|
---|
5098 | \end_layout
|
---|
5099 |
|
---|
5100 | \begin_layout Standard
|
---|
5101 |
|
---|
5102 | Step 72: energy -0.124285E+02 ( 0.641640E-05 )
|
---|
5103 | \end_layout
|
---|
5104 |
|
---|
5105 | \begin_layout Standard
|
---|
5106 |
|
---|
5107 | Step 73: energy -0.124285E+02 ( 0.182141E-05 )
|
---|
5108 | \end_layout
|
---|
5109 |
|
---|
5110 | \begin_layout Standard
|
---|
5111 |
|
---|
5112 | Step 74: energy -0.124285E+02 ( 0.219308E-05 )
|
---|
5113 | \end_layout
|
---|
5114 |
|
---|
5115 | \begin_layout Standard
|
---|
5116 |
|
---|
5117 | Step 75: energy -0.124285E+02 ( 0.348349E-05 )
|
---|
5118 | \end_layout
|
---|
5119 |
|
---|
5120 | \begin_layout Standard
|
---|
5121 |
|
---|
5122 | Step 76: energy -0.124285E+02 ( 0.166901E-05 )
|
---|
5123 | \end_layout
|
---|
5124 |
|
---|
5125 | \begin_layout Standard
|
---|
5126 |
|
---|
5127 | Step 77: energy -0.124285E+02 ( 0.177102E-06 )
|
---|
5128 | \end_layout
|
---|
5129 |
|
---|
5130 | \begin_layout Standard
|
---|
5131 |
|
---|
5132 | Step 78: energy -0.124285E+02 ( 0.663522E-08 )
|
---|
5133 | \end_layout
|
---|
5134 |
|
---|
5135 | \begin_layout Standard
|
---|
5136 |
|
---|
5137 | Step 79: energy -0.124285E+02 ( 0.210693E-08 )
|
---|
5138 | \end_layout
|
---|
5139 |
|
---|
5140 | \begin_layout Standard
|
---|
5141 |
|
---|
5142 | Step 80: energy -0.124285E+02 ( 0.370905E-08 )
|
---|
5143 | \end_layout
|
---|
5144 |
|
---|
5145 | \begin_layout Standard
|
---|
5146 |
|
---|
5147 | Step 81: energy -0.124285E+02 ( 0.324300E-08 )
|
---|
5148 | \end_layout
|
---|
5149 |
|
---|
5150 | \begin_layout Standard
|
---|
5151 |
|
---|
5152 | Step 82: energy -0.124285E+02 ( 0.777363E-09 )
|
---|
5153 | \end_layout
|
---|
5154 |
|
---|
5155 | \begin_layout Standard
|
---|
5156 |
|
---|
5157 | Step 83: energy -0.124285E+02 ( 0.443358E-10 )
|
---|
5158 | \end_layout
|
---|
5159 |
|
---|
5160 | \begin_layout Standard
|
---|
5161 |
|
---|
5162 | Step 84: energy -0.124285E+02 ( 0.322695E-11 )
|
---|
5163 | \end_layout
|
---|
5164 |
|
---|
5165 | \begin_layout Standard
|
---|
5166 |
|
---|
5167 | Step 85: energy -0.124285E+02 ( 0.144369E-11 )
|
---|
5168 | \end_layout
|
---|
5169 |
|
---|
5170 | \begin_layout Standard
|
---|
5171 |
|
---|
5172 | Step 86: energy -0.124285E+02 ( 0.291517E-11 )
|
---|
5173 | \end_layout
|
---|
5174 |
|
---|
5175 | \begin_layout Standard
|
---|
5176 |
|
---|
5177 | Step 87: energy -0.124285E+02 ( 0.322695E-11 )
|
---|
5178 | \end_layout
|
---|
5179 |
|
---|
5180 | \begin_layout Standard
|
---|
5181 |
|
---|
5182 | ---- CONVERGENCE ----
|
---|
5183 | \end_layout
|
---|
5184 |
|
---|
5185 | \begin_layout Standard
|
---|
5186 |
|
---|
5187 | \end_layout
|
---|
5188 |
|
---|
5189 | \begin_layout Standard
|
---|
5190 |
|
---|
5191 | Final energies __________________________________________________
|
---|
5192 | \end_layout
|
---|
5193 |
|
---|
5194 | \begin_layout Standard
|
---|
5195 |
|
---|
5196 | Total: -0.12429E+02
|
---|
5197 | \end_layout
|
---|
5198 |
|
---|
5199 | \begin_layout Standard
|
---|
5200 |
|
---|
5201 | Coulomb: 0.2143E+02 Lennard-Jones: -0.2923E+02 HB: -0.6706E+01
|
---|
5202 | \end_layout
|
---|
5203 |
|
---|
5204 | \begin_layout Standard
|
---|
5205 |
|
---|
5206 | Variables: 0.2084E+01 Solvatation: 0.0000E+00
|
---|
5207 | \end_layout
|
---|
5208 |
|
---|
5209 | \begin_layout Standard
|
---|
5210 |
|
---|
5211 | \end_layout
|
---|
5212 |
|
---|
5213 | \begin_layout Standard
|
---|
5214 |
|
---|
5215 | Variables _________________
|
---|
5216 | \end_layout
|
---|
5217 |
|
---|
5218 | \begin_layout Standard
|
---|
5219 |
|
---|
5220 | \end_layout
|
---|
5221 |
|
---|
5222 | \begin_layout Standard
|
---|
5223 |
|
---|
5224 | x1 1 -173.2 ( 0.6)
|
---|
5225 | \end_layout
|
---|
5226 |
|
---|
5227 | \begin_layout Standard
|
---|
5228 |
|
---|
5229 | x2 1 79.3 ( 0.6)
|
---|
5230 | \end_layout
|
---|
5231 |
|
---|
5232 | \begin_layout Standard
|
---|
5233 |
|
---|
5234 | x6 1 -166.3 ( 0.5)
|
---|
5235 | \end_layout
|
---|
5236 |
|
---|
5237 | \begin_layout Standard
|
---|
5238 |
|
---|
5239 | phi 1 -83.1 ( 3.2)
|
---|
5240 | \end_layout
|
---|
5241 |
|
---|
5242 | \begin_layout Standard
|
---|
5243 |
|
---|
5244 | psi 2 155.8 ( 0.4)
|
---|
5245 | \end_layout
|
---|
5246 |
|
---|
5247 | \begin_layout Standard
|
---|
5248 |
|
---|
5249 | omg 2 -177.1 ( 2.9)
|
---|
5250 | \end_layout
|
---|
5251 |
|
---|
5252 | \begin_layout Standard
|
---|
5253 |
|
---|
5254 | phi 2 -154.2 ( 0.3)
|
---|
5255 | \end_layout
|
---|
5256 |
|
---|
5257 | \begin_layout Standard
|
---|
5258 |
|
---|
5259 | psi 3 85.8 ( 2.2)
|
---|
5260 | \end_layout
|
---|
5261 |
|
---|
5262 | \begin_layout Standard
|
---|
5263 |
|
---|
5264 | omg 3 168.5 ( 11.5)
|
---|
5265 | \end_layout
|
---|
5266 |
|
---|
5267 | \begin_layout Standard
|
---|
5268 |
|
---|
5269 | phi 3 83.0 ( 0.7)
|
---|
5270 | \end_layout
|
---|
5271 |
|
---|
5272 | \begin_layout Standard
|
---|
5273 |
|
---|
5274 | psi 4 -75.0 ( 1.2)
|
---|
5275 | \end_layout
|
---|
5276 |
|
---|
5277 | \begin_layout Standard
|
---|
5278 |
|
---|
5279 | omg 4 -170.0 ( 10.0)
|
---|
5280 | \end_layout
|
---|
5281 |
|
---|
5282 | \begin_layout Standard
|
---|
5283 |
|
---|
5284 | x1 4 58.9 ( 0.1)
|
---|
5285 | \end_layout
|
---|
5286 |
|
---|
5287 | \begin_layout Standard
|
---|
5288 |
|
---|
5289 | x2 4 94.5 ( 0.1)
|
---|
5290 | \end_layout
|
---|
5291 |
|
---|
5292 | \begin_layout Standard
|
---|
5293 |
|
---|
5294 | phi 4 -136.8 ( 0.2)
|
---|
5295 | \end_layout
|
---|
5296 |
|
---|
5297 | \begin_layout Standard
|
---|
5298 |
|
---|
5299 | psi 5 19.1 ( 0.2)
|
---|
5300 | \end_layout
|
---|
5301 |
|
---|
5302 | \begin_layout Standard
|
---|
5303 |
|
---|
5304 | omg 5 -174.1 ( 5.9)
|
---|
5305 | \end_layout
|
---|
5306 |
|
---|
5307 | \begin_layout Standard
|
---|
5308 |
|
---|
5309 | x1 5 52.9 ( 0.1)
|
---|
5310 | \end_layout
|
---|
5311 |
|
---|
5312 | \begin_layout Standard
|
---|
5313 |
|
---|
5314 | x2 5 175.3 ( 0.0)
|
---|
5315 | \end_layout
|
---|
5316 |
|
---|
5317 | \begin_layout Standard
|
---|
5318 |
|
---|
5319 | x3 5 -179.9 ( 0.0)
|
---|
5320 | \end_layout
|
---|
5321 |
|
---|
5322 | \begin_layout Standard
|
---|
5323 |
|
---|
5324 | x4 5 -58.6 ( 0.0)
|
---|
5325 | \end_layout
|
---|
5326 |
|
---|
5327 | \begin_layout Standard
|
---|
5328 |
|
---|
5329 | phi 5 -163.4 ( 0.2)
|
---|
5330 | \end_layout
|
---|
5331 |
|
---|
5332 | \begin_layout Standard
|
---|
5333 |
|
---|
5334 | pst 5 160.8 ( 0.3)
|
---|
5335 | \end_layout
|
---|
5336 |
|
---|
5337 | \begin_layout Standard
|
---|
5338 |
|
---|
5339 | omt 5 -179.8 ( 0.2)
|
---|
5340 | \end_layout
|
---|
5341 |
|
---|
5342 | \begin_layout Standard
|
---|
5343 |
|
---|
5344 | \end_layout
|
---|
5345 |
|
---|
5346 | \begin_layout Standard
|
---|
5347 |
|
---|
5348 | Gradient______________________________________________________________
|
---|
5349 |
|
---|
5350 | \end_layout
|
---|
5351 |
|
---|
5352 | \begin_layout Standard
|
---|
5353 |
|
---|
5354 | 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
|
---|
5355 | \end_layout
|
---|
5356 |
|
---|
5357 | \begin_layout Standard
|
---|
5358 |
|
---|
5359 | 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
|
---|
5360 | \end_layout
|
---|
5361 |
|
---|
5362 | \begin_layout Standard
|
---|
5363 |
|
---|
5364 | 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
|
---|
5365 | \end_layout
|
---|
5366 |
|
---|
5367 | \begin_layout Standard
|
---|
5368 |
|
---|
5369 |
|
---|
5370 | \backslash
|
---|
5371 | end{verbatim}
|
---|
5372 | \end_layout
|
---|
5373 |
|
---|
5374 | \end_inset
|
---|
5375 |
|
---|
5376 |
|
---|
5377 | \end_layout
|
---|
5378 |
|
---|
5379 | \begin_layout Subsection
|
---|
5380 | Structure Determination by Simulated Annealing
|
---|
5381 | \begin_inset LatexCommand label
|
---|
5382 | name "sub:Structure-Determination-by"
|
---|
5383 |
|
---|
5384 | \end_inset
|
---|
5385 |
|
---|
5386 |
|
---|
5387 | \end_layout
|
---|
5388 |
|
---|
5389 | \begin_layout Standard
|
---|
5390 | For the following simulated annealing run for Met-Enkephalin defined through
|
---|
5391 | its sequence file
|
---|
5392 | \shape italic
|
---|
5393 | enkefa.seq
|
---|
5394 | \shape default
|
---|
5395 | , another configuration file
|
---|
5396 | \shape italic
|
---|
5397 | enkefa.ann
|
---|
5398 | \shape default
|
---|
5399 | is used.
|
---|
5400 | In this configuration file the dihedral angles
|
---|
5401 | \shape italic
|
---|
5402 | omg
|
---|
5403 | \shape default
|
---|
5404 | and
|
---|
5405 | \shape italic
|
---|
5406 | omt
|
---|
5407 | \shape default
|
---|
5408 | are fixed at 180.0 degrees using
|
---|
5409 | \begin_inset ERT
|
---|
5410 | status open
|
---|
5411 |
|
---|
5412 | \begin_layout Standard
|
---|
5413 |
|
---|
5414 |
|
---|
5415 | \backslash
|
---|
5416 | begin{verbatim}
|
---|
5417 | \end_layout
|
---|
5418 |
|
---|
5419 | \begin_layout Standard
|
---|
5420 |
|
---|
5421 | om*: 180.0 &
|
---|
5422 | \end_layout
|
---|
5423 |
|
---|
5424 | \begin_layout Standard
|
---|
5425 |
|
---|
5426 |
|
---|
5427 | \backslash
|
---|
5428 | end{verbatim}
|
---|
5429 | \end_layout
|
---|
5430 |
|
---|
5431 | \end_inset
|
---|
5432 |
|
---|
5433 | .
|
---|
5434 | Simulated annealing performs only poorly when these angles are free to
|
---|
5435 | change.
|
---|
5436 | In this example we choose ECEPP/2 ( setting
|
---|
5437 | \shape italic
|
---|
5438 | sh2 = .true.
|
---|
5439 |
|
---|
5440 | \shape default
|
---|
5441 | and no protein-solvation interaction.
|
---|
5442 | Hence, we have the following settings for parameters in
|
---|
5443 | \shape italic
|
---|
5444 | annealing.f
|
---|
5445 | \shape default
|
---|
5446 | :
|
---|
5447 | \begin_inset ERT
|
---|
5448 | status open
|
---|
5449 |
|
---|
5450 | \begin_layout Standard
|
---|
5451 |
|
---|
5452 |
|
---|
5453 | \backslash
|
---|
5454 | begin{verbatim}
|
---|
5455 | \end_layout
|
---|
5456 |
|
---|
5457 | \begin_layout Standard
|
---|
5458 |
|
---|
5459 | ientyp = 0
|
---|
5460 | \end_layout
|
---|
5461 |
|
---|
5462 | \begin_layout Standard
|
---|
5463 |
|
---|
5464 | sh2 = .true.
|
---|
5465 |
|
---|
5466 | \end_layout
|
---|
5467 |
|
---|
5468 | \begin_layout Standard
|
---|
5469 |
|
---|
5470 | itysol = 0
|
---|
5471 | \end_layout
|
---|
5472 |
|
---|
5473 | \begin_layout Standard
|
---|
5474 |
|
---|
5475 | iabin = 1
|
---|
5476 | \end_layout
|
---|
5477 |
|
---|
5478 | \begin_layout Standard
|
---|
5479 |
|
---|
5480 |
|
---|
5481 | \backslash
|
---|
5482 | end{verbatim}
|
---|
5483 | \end_layout
|
---|
5484 |
|
---|
5485 | \end_inset
|
---|
5486 |
|
---|
5487 | .
|
---|
5488 | Our simulated annealing run consists of 100 Monte Carlo sweeps at the highest
|
---|
5489 | temperature (1000 K) followed by 100,000 sweeps during which the temperature
|
---|
5490 | is gradually decreased to a final temperature of 100 K.
|
---|
5491 | The progress of the simulation is monitored by writing data into the file
|
---|
5492 | `
|
---|
5493 | \shape italic
|
---|
5494 | time.d
|
---|
5495 | \shape default
|
---|
5496 | ' every 1000 sweeps.
|
---|
5497 | The simulation starts from a random configuration.
|
---|
5498 |
|
---|
5499 | \begin_inset ERT
|
---|
5500 | status open
|
---|
5501 |
|
---|
5502 | \begin_layout Standard
|
---|
5503 |
|
---|
5504 |
|
---|
5505 | \backslash
|
---|
5506 | begin{verbatim}
|
---|
5507 | \end_layout
|
---|
5508 |
|
---|
5509 | \begin_layout Standard
|
---|
5510 |
|
---|
5511 | lrand=.true.
|
---|
5512 |
|
---|
5513 | \end_layout
|
---|
5514 |
|
---|
5515 | \begin_layout Standard
|
---|
5516 |
|
---|
5517 | nequi=100,
|
---|
5518 | \end_layout
|
---|
5519 |
|
---|
5520 | \begin_layout Standard
|
---|
5521 |
|
---|
5522 | nswp=100000
|
---|
5523 | \end_layout
|
---|
5524 |
|
---|
5525 | \begin_layout Standard
|
---|
5526 |
|
---|
5527 | nmes=1000
|
---|
5528 | \end_layout
|
---|
5529 |
|
---|
5530 | \begin_layout Standard
|
---|
5531 |
|
---|
5532 | tmax=1000.0
|
---|
5533 | \end_layout
|
---|
5534 |
|
---|
5535 | \begin_layout Standard
|
---|
5536 |
|
---|
5537 | tmin=100.0
|
---|
5538 | \end_layout
|
---|
5539 |
|
---|
5540 | \begin_layout Standard
|
---|
5541 |
|
---|
5542 | \end_layout
|
---|
5543 |
|
---|
5544 | \begin_layout Standard
|
---|
5545 |
|
---|
5546 | call anneal(nequi, nsweeps, nmes, tmax, tmin, lrand)
|
---|
5547 | \end_layout
|
---|
5548 |
|
---|
5549 | \begin_layout Standard
|
---|
5550 |
|
---|
5551 |
|
---|
5552 | \backslash
|
---|
5553 | end{verbatim}
|
---|
5554 | \end_layout
|
---|
5555 |
|
---|
5556 | \end_inset
|
---|
5557 |
|
---|
5558 |
|
---|
5559 | \end_layout
|
---|
5560 |
|
---|
5561 | \begin_layout Standard
|
---|
5562 | After compiling the example with
|
---|
5563 | \emph on
|
---|
5564 | make annealing
|
---|
5565 | \emph default
|
---|
5566 | in the sub-directory
|
---|
5567 | \shape italic
|
---|
5568 | EXAMPLES,
|
---|
5569 | \shape default
|
---|
5570 |
|
---|
5571 | \shape italic
|
---|
5572 | \emph on
|
---|
5573 | we run the program by calling
|
---|
5574 | \shape default
|
---|
5575 | \emph default
|
---|
5576 |
|
---|
5577 | \shape italic
|
---|
5578 | annealing.
|
---|
5579 |
|
---|
5580 | \shape default
|
---|
5581 | The output will contain the energy of the start configuration, energy after
|
---|
5582 | equilibration, the average acceptance rate of moves in the simulated annealing
|
---|
5583 | run, the final configuration (and its energy) and the configuration with
|
---|
5584 | the lowest energy found in this run:
|
---|
5585 | \begin_inset ERT
|
---|
5586 | status open
|
---|
5587 |
|
---|
5588 | \begin_layout Standard
|
---|
5589 |
|
---|
5590 |
|
---|
5591 | \backslash
|
---|
5592 | begin{verbatim}
|
---|
5593 | \end_layout
|
---|
5594 |
|
---|
5595 | \begin_layout Standard
|
---|
5596 |
|
---|
5597 | init_energy: itysol = 0
|
---|
5598 | \end_layout
|
---|
5599 |
|
---|
5600 | \begin_layout Standard
|
---|
5601 |
|
---|
5602 | init_energy: esol_scaling = F
|
---|
5603 | \end_layout
|
---|
5604 |
|
---|
5605 | \begin_layout Standard
|
---|
5606 |
|
---|
5607 | init_molecule: Solvent: 0
|
---|
5608 | \end_layout
|
---|
5609 |
|
---|
5610 | \begin_layout Standard
|
---|
5611 |
|
---|
5612 | File with SEQUENCE: enkefa.seq
|
---|
5613 | \end_layout
|
---|
5614 |
|
---|
5615 | \begin_layout Standard
|
---|
5616 |
|
---|
5617 | enkefa.ann
|
---|
5618 | \end_layout
|
---|
5619 |
|
---|
5620 | \begin_layout Standard
|
---|
5621 |
|
---|
5622 | \end_layout
|
---|
5623 |
|
---|
5624 | \begin_layout Standard
|
---|
5625 |
|
---|
5626 | redvar> Met-Enkephalin: residue 2 Gly : omg set 180.000 Fixed
|
---|
5627 | \end_layout
|
---|
5628 |
|
---|
5629 | \begin_layout Standard
|
---|
5630 |
|
---|
5631 | redvar> Met-Enkephalin: residue 3 Gly : omg set 180.000 Fixed
|
---|
5632 | \end_layout
|
---|
5633 |
|
---|
5634 | \begin_layout Standard
|
---|
5635 |
|
---|
5636 | redvar> Met-Enkephalin: residue 4 Phe : omg set 180.000 Fixed
|
---|
5637 | \end_layout
|
---|
5638 |
|
---|
5639 | \begin_layout Standard
|
---|
5640 |
|
---|
5641 | redvar> Met-Enkephalin: residue 5 Met : omg set 180.000 Fixed
|
---|
5642 | \end_layout
|
---|
5643 |
|
---|
5644 | \begin_layout Standard
|
---|
5645 |
|
---|
5646 | redvar> Met-Enkephalin: residue 5 Met : omt set 180.000 Fixed
|
---|
5647 | \end_layout
|
---|
5648 |
|
---|
5649 | \begin_layout Standard
|
---|
5650 |
|
---|
5651 | redvar> Molecule Met-Enkephalin: 19 variable(s) remain unchanged
|
---|
5652 | \end_layout
|
---|
5653 |
|
---|
5654 | \begin_layout Standard
|
---|
5655 |
|
---|
5656 | \end_layout
|
---|
5657 |
|
---|
5658 | \begin_layout Standard
|
---|
5659 |
|
---|
5660 | energy of start configuration: 0.75921E+09
|
---|
5661 | \end_layout
|
---|
5662 |
|
---|
5663 | \begin_layout Standard
|
---|
5664 |
|
---|
5665 | \end_layout
|
---|
5666 |
|
---|
5667 | \begin_layout Standard
|
---|
5668 |
|
---|
5669 | Energy after equilibration: 11.0835755006373
|
---|
5670 | \end_layout
|
---|
5671 |
|
---|
5672 | \begin_layout Standard
|
---|
5673 |
|
---|
5674 | acceptance rate: 0.181430817270775
|
---|
5675 | \end_layout
|
---|
5676 |
|
---|
5677 | \begin_layout Standard
|
---|
5678 |
|
---|
5679 | \end_layout
|
---|
5680 |
|
---|
5681 | \begin_layout Standard
|
---|
5682 |
|
---|
5683 | last energy -8.03108763810183
|
---|
5684 | \end_layout
|
---|
5685 |
|
---|
5686 | \begin_layout Standard
|
---|
5687 |
|
---|
5688 | 1 : 1 : x1 : -168.428
|
---|
5689 | \end_layout
|
---|
5690 |
|
---|
5691 | \begin_layout Standard
|
---|
5692 |
|
---|
5693 | 1 : 1 : x2 : 89.562
|
---|
5694 | \end_layout
|
---|
5695 |
|
---|
5696 | \begin_layout Standard
|
---|
5697 |
|
---|
5698 | 1 : 1 : x6 : -2.861
|
---|
5699 | \end_layout
|
---|
5700 |
|
---|
5701 | \begin_layout Standard
|
---|
5702 |
|
---|
5703 | 1 : 1 : phi : -112.654
|
---|
5704 | \end_layout
|
---|
5705 |
|
---|
5706 | \begin_layout Standard
|
---|
5707 |
|
---|
5708 | 1 : 2 : psi : 156.420
|
---|
5709 | \end_layout
|
---|
5710 |
|
---|
5711 | \begin_layout Standard
|
---|
5712 |
|
---|
5713 | 1 : 2 : omg : -180.000 &
|
---|
5714 | \end_layout
|
---|
5715 |
|
---|
5716 | \begin_layout Standard
|
---|
5717 |
|
---|
5718 | 1 : 2 : phi : -174.567
|
---|
5719 | \end_layout
|
---|
5720 |
|
---|
5721 | \begin_layout Standard
|
---|
5722 |
|
---|
5723 | 1 : 3 : psi : 146.718
|
---|
5724 | \end_layout
|
---|
5725 |
|
---|
5726 | \begin_layout Standard
|
---|
5727 |
|
---|
5728 | 1 : 3 : omg : -180.000 &
|
---|
5729 | \end_layout
|
---|
5730 |
|
---|
5731 | \begin_layout Standard
|
---|
5732 |
|
---|
5733 | 1 : 3 : phi : 68.148
|
---|
5734 | \end_layout
|
---|
5735 |
|
---|
5736 | \begin_layout Standard
|
---|
5737 |
|
---|
5738 | 1 : 4 : psi : -96.563
|
---|
5739 | \end_layout
|
---|
5740 |
|
---|
5741 | \begin_layout Standard
|
---|
5742 |
|
---|
5743 | 1 : 4 : omg : -180.000 &
|
---|
5744 | \end_layout
|
---|
5745 |
|
---|
5746 | \begin_layout Standard
|
---|
5747 |
|
---|
5748 | 1 : 4 : x1 : 59.864
|
---|
5749 | \end_layout
|
---|
5750 |
|
---|
5751 | \begin_layout Standard
|
---|
5752 |
|
---|
5753 | 1 : 4 : x2 : -83.907
|
---|
5754 | \end_layout
|
---|
5755 |
|
---|
5756 | \begin_layout Standard
|
---|
5757 |
|
---|
5758 | 1 : 4 : phi : -141.914
|
---|
5759 | \end_layout
|
---|
5760 |
|
---|
5761 | \begin_layout Standard
|
---|
5762 |
|
---|
5763 | 1 : 5 : psi : 20.747
|
---|
5764 | \end_layout
|
---|
5765 |
|
---|
5766 | \begin_layout Standard
|
---|
5767 |
|
---|
5768 | 1 : 5 : omg : -180.000 &
|
---|
5769 | \end_layout
|
---|
5770 |
|
---|
5771 | \begin_layout Standard
|
---|
5772 |
|
---|
5773 | 1 : 5 : x1 : 61.133
|
---|
5774 | \end_layout
|
---|
5775 |
|
---|
5776 | \begin_layout Standard
|
---|
5777 |
|
---|
5778 | 1 : 5 : x2 : -174.118
|
---|
5779 | \end_layout
|
---|
5780 |
|
---|
5781 | \begin_layout Standard
|
---|
5782 |
|
---|
5783 | 1 : 5 : x3 : 176.917
|
---|
5784 | \end_layout
|
---|
5785 |
|
---|
5786 | \begin_layout Standard
|
---|
5787 |
|
---|
5788 | 1 : 5 : x4 : -178.096
|
---|
5789 | \end_layout
|
---|
5790 |
|
---|
5791 | \begin_layout Standard
|
---|
5792 |
|
---|
5793 | 1 : 5 : phi : -162.246
|
---|
5794 | \end_layout
|
---|
5795 |
|
---|
5796 | \begin_layout Standard
|
---|
5797 |
|
---|
5798 | 1 : 5 : pst : 161.616
|
---|
5799 | \end_layout
|
---|
5800 |
|
---|
5801 | \begin_layout Standard
|
---|
5802 |
|
---|
5803 | 1 : 5 : omt : -180.000 &
|
---|
5804 | \end_layout
|
---|
5805 |
|
---|
5806 | \begin_layout Standard
|
---|
5807 |
|
---|
5808 | \end_layout
|
---|
5809 |
|
---|
5810 | \begin_layout Standard
|
---|
5811 |
|
---|
5812 | lowest energy ever found: 63297 -9.40635361798398
|
---|
5813 | \end_layout
|
---|
5814 |
|
---|
5815 | \begin_layout Standard
|
---|
5816 |
|
---|
5817 |
|
---|
5818 | \backslash
|
---|
5819 | end{verbatim}
|
---|
5820 | \end_layout
|
---|
5821 |
|
---|
5822 | \end_inset
|
---|
5823 |
|
---|
5824 | The random start configuration, final configuration and lowest-energy configura
|
---|
5825 | tion are also written in PDB-format into the files
|
---|
5826 | \shape italic
|
---|
5827 | start.pdb
|
---|
5828 | \shape default
|
---|
5829 | ,
|
---|
5830 | \shape italic
|
---|
5831 | final.pdb
|
---|
5832 | \shape default
|
---|
5833 | and
|
---|
5834 | \shape italic
|
---|
5835 | global.pdb
|
---|
5836 | \shape default
|
---|
5837 | allowing for easy visualization of these configurations with programs graphical
|
---|
5838 | ly displaying PDB-structures.
|
---|
5839 | The progress of the simulated annealing run is monitored through the time
|
---|
5840 | series in file
|
---|
5841 | \shape italic
|
---|
5842 | time.d
|
---|
5843 | \shape default
|
---|
5844 | which list the Monte Carlo sweep, temperature, ECEPP/2 energy, radius-of-gyrati
|
---|
5845 | on, the partial energy terms
|
---|
5846 | \begin_inset Formula $E_{\mbox{hb}}$
|
---|
5847 | \end_inset
|
---|
5848 |
|
---|
5849 | ,
|
---|
5850 | \begin_inset Formula $E_{\mbox{vdW}}$
|
---|
5851 | \end_inset
|
---|
5852 |
|
---|
5853 | ,
|
---|
5854 | \begin_inset Formula $E_{\mbox{C}}$
|
---|
5855 | \end_inset
|
---|
5856 |
|
---|
5857 | ,
|
---|
5858 | \begin_inset Formula $E_{\mbox{vr}}$
|
---|
5859 | \end_inset
|
---|
5860 |
|
---|
5861 | and the Zimmerman-coding of the present configuration.
|
---|
5862 | All the terms related to the solvent have been replaced by a single dot
|
---|
5863 | per column in the sample below.
|
---|
5864 |
|
---|
5865 | \begin_inset ERT
|
---|
5866 | status open
|
---|
5867 |
|
---|
5868 | \begin_layout Standard
|
---|
5869 |
|
---|
5870 |
|
---|
5871 | \backslash
|
---|
5872 | begin{verbatim}
|
---|
5873 | \end_layout
|
---|
5874 |
|
---|
5875 | \begin_layout Standard
|
---|
5876 |
|
---|
5877 | # $Id: anneal.f 192 2007-01-02 14:06:25Z meinke $
|
---|
5878 | \end_layout
|
---|
5879 |
|
---|
5880 | \begin_layout Standard
|
---|
5881 |
|
---|
5882 | # nsw, temp, eol, eysl, eyslh, eyslp, asa, rgy,
|
---|
5883 | \end_layout
|
---|
5884 |
|
---|
5885 | \begin_layout Standard
|
---|
5886 |
|
---|
5887 | # rgyh, rgyp, eyhb, eyvw, eyel, eyvr, zimm
|
---|
5888 | \end_layout
|
---|
5889 |
|
---|
5890 | \begin_layout Standard
|
---|
5891 |
|
---|
5892 | 0 1000.000 8.045 ....
|
---|
5893 | 4.542 ..
|
---|
5894 | -3.992 -14.929 23.308 3.658 ghcBD
|
---|
5895 | \end_layout
|
---|
5896 |
|
---|
5897 | \begin_layout Standard
|
---|
5898 |
|
---|
5899 | 1000 977.237 16.397 ....
|
---|
5900 | 5.835 ..
|
---|
5901 | -2.029 -11.821 24.061 6.186 BDeCG
|
---|
5902 | \end_layout
|
---|
5903 |
|
---|
5904 | \begin_layout Standard
|
---|
5905 |
|
---|
5906 | 2000 954.993 16.147 ....
|
---|
5907 | 5.302 ..
|
---|
5908 | -1.786 -11.072 25.230 3.775 AdEDA
|
---|
5909 | \end_layout
|
---|
5910 |
|
---|
5911 | \begin_layout Standard
|
---|
5912 |
|
---|
5913 | 3000 933.254 26.320 ....
|
---|
5914 | 6.434 ..
|
---|
5915 | -1.324 -4.642 25.514 6.771 EecFC
|
---|
5916 | \end_layout
|
---|
5917 |
|
---|
5918 | \begin_layout Standard
|
---|
5919 |
|
---|
5920 | 4000 912.011 14.884 ....
|
---|
5921 | 5.145 ..
|
---|
5922 | -2.474 -13.559 25.449 5.469 EHDDB
|
---|
5923 | \end_layout
|
---|
5924 |
|
---|
5925 | \begin_layout Standard
|
---|
5926 |
|
---|
5927 | 5000 891.251 21.650 ....
|
---|
5928 | 5.882 ..
|
---|
5929 | -1.179 -8.380 27.125 4.083 EHfEB
|
---|
5930 | \end_layout
|
---|
5931 |
|
---|
5932 | \begin_layout Standard
|
---|
5933 |
|
---|
5934 | 6000 870.964 13.854 ....
|
---|
5935 | 5.806 ..
|
---|
5936 | -2.271 -12.703 25.621 3.207 EcaEh
|
---|
5937 | \end_layout
|
---|
5938 |
|
---|
5939 | \begin_layout Standard
|
---|
5940 |
|
---|
5941 | 7000 851.138 19.786 ....
|
---|
5942 | 5.439 ..
|
---|
5943 | -1.952 -9.254 26.428 4.565 EHaAE
|
---|
5944 | \end_layout
|
---|
5945 |
|
---|
5946 | \begin_layout Standard
|
---|
5947 |
|
---|
5948 | 8000 831.764 14.299 ....
|
---|
5949 | 5.986 ..
|
---|
5950 | -1.596 -16.538 24.699 7.735 EECEF
|
---|
5951 | \end_layout
|
---|
5952 |
|
---|
5953 | \begin_layout Standard
|
---|
5954 |
|
---|
5955 | 9000 812.831 7.773 ....
|
---|
5956 | 4.915 ..
|
---|
5957 | -2.819 -16.392 24.850 2.134 EECBB
|
---|
5958 | \end_layout
|
---|
5959 |
|
---|
5960 | \begin_layout Standard
|
---|
5961 |
|
---|
5962 | ...
|
---|
5963 | \end_layout
|
---|
5964 |
|
---|
5965 | \begin_layout Standard
|
---|
5966 |
|
---|
5967 | ...
|
---|
5968 | \end_layout
|
---|
5969 |
|
---|
5970 | \begin_layout Standard
|
---|
5971 |
|
---|
5972 | ...
|
---|
5973 | \end_layout
|
---|
5974 |
|
---|
5975 | \begin_layout Standard
|
---|
5976 |
|
---|
5977 | 91000 123.027 -8.381 ....
|
---|
5978 | 4.414 ..
|
---|
5979 | -5.162 -26.932 22.230 1.483 FEcDE
|
---|
5980 | \end_layout
|
---|
5981 |
|
---|
5982 | \begin_layout Standard
|
---|
5983 |
|
---|
5984 | 92000 120.226 -6.302 ....
|
---|
5985 | 4.439 ..
|
---|
5986 | -4.825 -25.727 22.824 1.426 EEcDE
|
---|
5987 | \end_layout
|
---|
5988 |
|
---|
5989 | \begin_layout Standard
|
---|
5990 |
|
---|
5991 | 93000 117.490 -6.655 ....
|
---|
5992 | 4.413 ..
|
---|
5993 | -4.355 -25.081 21.937 0.845 FEcDE
|
---|
5994 | \end_layout
|
---|
5995 |
|
---|
5996 | \begin_layout Standard
|
---|
5997 |
|
---|
5998 | 94000 114.815 -8.190 ....
|
---|
5999 | 4.523 ..
|
---|
6000 | -6.848 -24.025 21.598 1.086 FEcDE
|
---|
6001 | \end_layout
|
---|
6002 |
|
---|
6003 | \begin_layout Standard
|
---|
6004 |
|
---|
6005 | 95000 112.202 -5.965 ....
|
---|
6006 | 4.434 ..
|
---|
6007 | -5.052 -24.021 21.995 1.114 EEcDE
|
---|
6008 | \end_layout
|
---|
6009 |
|
---|
6010 | \begin_layout Standard
|
---|
6011 |
|
---|
6012 | 96000 109.648 -7.081 ....
|
---|
6013 | 4.444 ..
|
---|
6014 | -4.717 -25.137 22.669 0.104 EEcDE
|
---|
6015 | \end_layout
|
---|
6016 |
|
---|
6017 | \begin_layout Standard
|
---|
6018 |
|
---|
6019 | 97000 107.152 -8.042 ....
|
---|
6020 | 4.561 ..
|
---|
6021 | -4.969 -25.544 21.850 0.621 FEcDE
|
---|
6022 | \end_layout
|
---|
6023 |
|
---|
6024 | \begin_layout Standard
|
---|
6025 |
|
---|
6026 | 98000 104.713 -7.342 ....
|
---|
6027 | 4.439 ..
|
---|
6028 | -4.737 -26.152 22.463 1.083 FEcDE
|
---|
6029 | \end_layout
|
---|
6030 |
|
---|
6031 | \begin_layout Standard
|
---|
6032 |
|
---|
6033 | 99000 102.329 -6.561 ....
|
---|
6034 | 4.438 ..
|
---|
6035 | -3.975 -25.213 21.963 0.664 FEcDE
|
---|
6036 | \end_layout
|
---|
6037 |
|
---|
6038 | \begin_layout Standard
|
---|
6039 |
|
---|
6040 | 100000 100.000 -8.031 ....
|
---|
6041 | 4.433 ..
|
---|
6042 | -5.231 -25.792 22.659 0.333 EEcDE
|
---|
6043 | \end_layout
|
---|
6044 |
|
---|
6045 | \begin_layout Standard
|
---|
6046 |
|
---|
6047 |
|
---|
6048 | \backslash
|
---|
6049 | end{verbatim}
|
---|
6050 | \end_layout
|
---|
6051 |
|
---|
6052 | \end_inset
|
---|
6053 |
|
---|
6054 |
|
---|
6055 | \end_layout
|
---|
6056 |
|
---|
6057 | \begin_layout Subsection
|
---|
6058 | Calculation of Multicanonical Parameters
|
---|
6059 | \begin_inset LatexCommand label
|
---|
6060 | name "sub:Calculation-of-Multicanonical"
|
---|
6061 |
|
---|
6062 | \end_inset
|
---|
6063 |
|
---|
6064 |
|
---|
6065 | \end_layout
|
---|
6066 |
|
---|
6067 | \begin_layout Standard
|
---|
6068 | In the following example, multicanonical parameters are calculated for met-enkep
|
---|
6069 | halin (with fixed omega angles) in gas-phase simulations relying on the
|
---|
6070 | ECEPP/3 force-field.
|
---|
6071 |
|
---|
6072 | \shape italic
|
---|
6073 | \emph on
|
---|
6074 | The functions
|
---|
6075 | \shape default
|
---|
6076 | \emph default
|
---|
6077 |
|
---|
6078 | \shape italic
|
---|
6079 | mulcan_par
|
---|
6080 | \shape default
|
---|
6081 |
|
---|
6082 | \shape italic
|
---|
6083 | \emph on
|
---|
6084 | and
|
---|
6085 | \shape default
|
---|
6086 | \emph default
|
---|
6087 |
|
---|
6088 | \shape italic
|
---|
6089 | mulcan_sim
|
---|
6090 | \shape default
|
---|
6091 | are part of the module
|
---|
6092 | \emph on
|
---|
6093 | multicanonical.
|
---|
6094 |
|
---|
6095 | \emph default
|
---|
6096 | To use the module, include
|
---|
6097 | \emph on
|
---|
6098 | use multicanonical
|
---|
6099 | \emph default
|
---|
6100 | in
|
---|
6101 | \emph on
|
---|
6102 | main
|
---|
6103 | \emph default
|
---|
6104 | .
|
---|
6105 | For this example, we set the following parameters in '
|
---|
6106 | \shape italic
|
---|
6107 | main
|
---|
6108 | \shape default
|
---|
6109 | ':
|
---|
6110 | \end_layout
|
---|
6111 |
|
---|
6112 | \begin_layout Standard
|
---|
6113 | \begin_inset ERT
|
---|
6114 | status open
|
---|
6115 |
|
---|
6116 | \begin_layout Standard
|
---|
6117 |
|
---|
6118 |
|
---|
6119 | \backslash
|
---|
6120 | begin{verbatim}
|
---|
6121 | \end_layout
|
---|
6122 |
|
---|
6123 | \begin_layout Standard
|
---|
6124 |
|
---|
6125 | ientyp = 0
|
---|
6126 | \end_layout
|
---|
6127 |
|
---|
6128 | \begin_layout Standard
|
---|
6129 |
|
---|
6130 | sh2 = .false.
|
---|
6131 |
|
---|
6132 | \end_layout
|
---|
6133 |
|
---|
6134 | \begin_layout Standard
|
---|
6135 |
|
---|
6136 | itysol = 0
|
---|
6137 | \end_layout
|
---|
6138 |
|
---|
6139 | \begin_layout Standard
|
---|
6140 |
|
---|
6141 | iabin = 1
|
---|
6142 | \end_layout
|
---|
6143 |
|
---|
6144 | \begin_layout Standard
|
---|
6145 |
|
---|
6146 |
|
---|
6147 | \backslash
|
---|
6148 | end{verbatim}
|
---|
6149 | \end_layout
|
---|
6150 |
|
---|
6151 | \end_inset
|
---|
6152 |
|
---|
6153 |
|
---|
6154 | \end_layout
|
---|
6155 |
|
---|
6156 | \begin_layout Standard
|
---|
6157 | The simulation has a total of 100,000 Monte Carlo sweeps and the multicanonical
|
---|
6158 | parameters are updated every 2,000 sweeps.
|
---|
6159 | The parameters are calculated from scratch, and we attempt to obtain a
|
---|
6160 | histogram in energy in the interval [-12,20] Kcal/mol with energy bin size
|
---|
6161 | 1 Kcal/mol.
|
---|
6162 | We expect that at temperature 1000 K we are clearly in the high-energy
|
---|
6163 | phase where successive configurations have little correlation.
|
---|
6164 | This leads to the following set of arguments for calling
|
---|
6165 | \emph on
|
---|
6166 | mulcan
|
---|
6167 | \emph default
|
---|
6168 | _
|
---|
6169 | \emph on
|
---|
6170 | par
|
---|
6171 | \emph default
|
---|
6172 | :
|
---|
6173 | \end_layout
|
---|
6174 |
|
---|
6175 | \begin_layout Standard
|
---|
6176 | \begin_inset ERT
|
---|
6177 | status open
|
---|
6178 |
|
---|
6179 | \begin_layout Standard
|
---|
6180 |
|
---|
6181 |
|
---|
6182 | \backslash
|
---|
6183 | begin{verbatim}
|
---|
6184 | \end_layout
|
---|
6185 |
|
---|
6186 | \begin_layout Standard
|
---|
6187 |
|
---|
6188 | l_iter=.false.
|
---|
6189 | \end_layout
|
---|
6190 |
|
---|
6191 | \begin_layout Standard
|
---|
6192 |
|
---|
6193 | kmin=-12
|
---|
6194 | \end_layout
|
---|
6195 |
|
---|
6196 | \begin_layout Standard
|
---|
6197 |
|
---|
6198 | kmax=20
|
---|
6199 | \end_layout
|
---|
6200 |
|
---|
6201 | \begin_layout Standard
|
---|
6202 |
|
---|
6203 | ebin=1.0d0
|
---|
6204 | \end_layout
|
---|
6205 |
|
---|
6206 | \begin_layout Standard
|
---|
6207 |
|
---|
6208 | nsweep=100000
|
---|
6209 | \end_layout
|
---|
6210 |
|
---|
6211 | \begin_layout Standard
|
---|
6212 |
|
---|
6213 | nup=5000
|
---|
6214 | \end_layout
|
---|
6215 |
|
---|
6216 | \begin_layout Standard
|
---|
6217 |
|
---|
6218 | temp=1000.0
|
---|
6219 | \end_layout
|
---|
6220 |
|
---|
6221 | \begin_layout Standard
|
---|
6222 |
|
---|
6223 | call mulcan_par(nsweep, nup, temp, kmin, kmax, l_iter)
|
---|
6224 | \end_layout
|
---|
6225 |
|
---|
6226 | \begin_layout Standard
|
---|
6227 |
|
---|
6228 |
|
---|
6229 | \backslash
|
---|
6230 | end{verbatim}
|
---|
6231 | \end_layout
|
---|
6232 |
|
---|
6233 | \end_inset
|
---|
6234 |
|
---|
6235 |
|
---|
6236 | \end_layout
|
---|
6237 |
|
---|
6238 | \begin_layout Standard
|
---|
6239 | This example is available in the file
|
---|
6240 | \emph on
|
---|
6241 | multicanonical.f
|
---|
6242 | \emph default
|
---|
6243 | in the EXAMPLES directory.
|
---|
6244 | After compiling it with
|
---|
6245 | \emph on
|
---|
6246 | make
|
---|
6247 | \emph default
|
---|
6248 |
|
---|
6249 | \emph on
|
---|
6250 | multicanonical
|
---|
6251 | \emph default
|
---|
6252 | and running the program using
|
---|
6253 | \emph on
|
---|
6254 | multicanonical
|
---|
6255 | \emph default
|
---|
6256 | the calculated multicanonical parameters are written into the file '
|
---|
6257 | \shape italic
|
---|
6258 | muca.d
|
---|
6259 | \shape default
|
---|
6260 | '.
|
---|
6261 | For further iteration of these parameters additional quantities such as
|
---|
6262 | the accumulated histogram are written into a file '
|
---|
6263 | \shape italic
|
---|
6264 | mpar_full.d
|
---|
6265 | \shape default
|
---|
6266 | ' (out of which '
|
---|
6267 | \shape italic
|
---|
6268 | mulcan_par
|
---|
6269 | \shape default
|
---|
6270 | ' reads them if '
|
---|
6271 | \shape italic
|
---|
6272 | l_iter=.true.
|
---|
6273 | \shape default
|
---|
6274 | ' is set).
|
---|
6275 | We show here only the file '
|
---|
6276 | \shape italic
|
---|
6277 | muca.d
|
---|
6278 | \shape default
|
---|
6279 | ' which lists the index of the energy bin, the
|
---|
6280 | \begin_inset Formula $\beta(E)$
|
---|
6281 | \end_inset
|
---|
6282 |
|
---|
6283 | and the
|
---|
6284 | \begin_inset Formula $\alpha(E)$
|
---|
6285 | \end_inset
|
---|
6286 |
|
---|
6287 | parameters (see
|
---|
6288 | \begin_inset LatexCommand citep
|
---|
6289 | key "Eisenmenger2001"
|
---|
6290 |
|
---|
6291 | \end_inset
|
---|
6292 |
|
---|
6293 | ) for more detailed explanations and references on multicanonical simulations):
|
---|
6294 | \end_layout
|
---|
6295 |
|
---|
6296 | \begin_layout Standard
|
---|
6297 | \begin_inset ERT
|
---|
6298 | status open
|
---|
6299 |
|
---|
6300 | \begin_layout Standard
|
---|
6301 |
|
---|
6302 |
|
---|
6303 | \backslash
|
---|
6304 | begin{verbatim}
|
---|
6305 | \end_layout
|
---|
6306 |
|
---|
6307 | \begin_layout Standard
|
---|
6308 |
|
---|
6309 | -12 11.8671041270715 93.0982188015155
|
---|
6310 | \end_layout
|
---|
6311 |
|
---|
6312 | \begin_layout Standard
|
---|
6313 |
|
---|
6314 | -11 6.74942546567488 34.2449141954539
|
---|
6315 | \end_layout
|
---|
6316 |
|
---|
6317 | \begin_layout Standard
|
---|
6318 |
|
---|
6319 | -10 4.76239638525333 13.3811088510276
|
---|
6320 | \end_layout
|
---|
6321 |
|
---|
6322 | \begin_layout Standard
|
---|
6323 |
|
---|
6324 | -9 2.62566106761319 -6.91787666655369
|
---|
6325 | \end_layout
|
---|
6326 |
|
---|
6327 | \begin_layout Standard
|
---|
6328 |
|
---|
6329 | -8 2.76891298156071 -5.70023539799973
|
---|
6330 | \end_layout
|
---|
6331 |
|
---|
6332 | \begin_layout Standard
|
---|
6333 |
|
---|
6334 | -7 2.98636199792932 -4.06936777523520
|
---|
6335 | \end_layout
|
---|
6336 |
|
---|
6337 | \begin_layout Standard
|
---|
6338 |
|
---|
6339 | -6 2.62458524605883 -6.42091666239336
|
---|
6340 | \end_layout
|
---|
6341 |
|
---|
6342 | \begin_layout Standard
|
---|
6343 |
|
---|
6344 | -5 2.68953283146133 -6.06370494267963
|
---|
6345 | \end_layout
|
---|
6346 |
|
---|
6347 | \begin_layout Standard
|
---|
6348 |
|
---|
6349 | -4 1.99405651648455 -9.19334836007513
|
---|
6350 | \end_layout
|
---|
6351 |
|
---|
6352 | \begin_layout Standard
|
---|
6353 |
|
---|
6354 | -3 2.37207855308226 -7.87027123198313
|
---|
6355 | \end_layout
|
---|
6356 |
|
---|
6357 | \begin_layout Standard
|
---|
6358 |
|
---|
6359 | -2 1.80430850778520 -9.28969634522579
|
---|
6360 | \end_layout
|
---|
6361 |
|
---|
6362 | \begin_layout Standard
|
---|
6363 |
|
---|
6364 | -1 1.91571656031594 -9.12258426642968
|
---|
6365 | \end_layout
|
---|
6366 |
|
---|
6367 | \begin_layout Standard
|
---|
6368 |
|
---|
6369 | 0 1.72752866077015 -9.21667821620257
|
---|
6370 | \end_layout
|
---|
6371 |
|
---|
6372 | \begin_layout Standard
|
---|
6373 |
|
---|
6374 | 1 1.66881722525666 -9.18732249844583
|
---|
6375 | \end_layout
|
---|
6376 |
|
---|
6377 | \begin_layout Standard
|
---|
6378 |
|
---|
6379 | 2 1.50004119691055 -8.93415845592665
|
---|
6380 | \end_layout
|
---|
6381 |
|
---|
6382 | \begin_layout Standard
|
---|
6383 |
|
---|
6384 | 3 1.39142908670518 -8.66262818041324
|
---|
6385 | \end_layout
|
---|
6386 |
|
---|
6387 | \begin_layout Standard
|
---|
6388 |
|
---|
6389 | 4 1.16605491925085 -7.87381859432308
|
---|
6390 | \end_layout
|
---|
6391 |
|
---|
6392 | \begin_layout Standard
|
---|
6393 |
|
---|
6394 | 5 1.88002935687926 -11.0867035636509
|
---|
6395 | \end_layout
|
---|
6396 |
|
---|
6397 | \begin_layout Standard
|
---|
6398 |
|
---|
6399 | 6 0.784923700785834 -5.06362245513708
|
---|
6400 | \end_layout
|
---|
6401 |
|
---|
6402 | \begin_layout Standard
|
---|
6403 |
|
---|
6404 | 7 1.15928001690741 -7.49693850992732
|
---|
6405 | \end_layout
|
---|
6406 |
|
---|
6407 | \begin_layout Standard
|
---|
6408 |
|
---|
6409 | 8 1.53630835441332 -10.3246510412217
|
---|
6410 | \end_layout
|
---|
6411 |
|
---|
6412 | \begin_layout Standard
|
---|
6413 |
|
---|
6414 | 9 0.804876443148135 -4.10747979546758
|
---|
6415 | \end_layout
|
---|
6416 |
|
---|
6417 | \begin_layout Standard
|
---|
6418 |
|
---|
6419 | 10 1.20439627142663 -7.90291816411324
|
---|
6420 | \end_layout
|
---|
6421 |
|
---|
6422 | \begin_layout Standard
|
---|
6423 |
|
---|
6424 | 11 0.843296201282429 -4.11136742759918
|
---|
6425 | \end_layout
|
---|
6426 |
|
---|
6427 | \begin_layout Standard
|
---|
6428 |
|
---|
6429 | 12 1.03327436670481 -6.29611632995659
|
---|
6430 | \end_layout
|
---|
6431 |
|
---|
6432 | \begin_layout Standard
|
---|
6433 |
|
---|
6434 | 13 0.847836723791197 -3.97814579353639
|
---|
6435 | \end_layout
|
---|
6436 |
|
---|
6437 | \begin_layout Standard
|
---|
6438 |
|
---|
6439 | 14 0.794466332096526 -3.25764550565833
|
---|
6440 | \end_layout
|
---|
6441 |
|
---|
6442 | \begin_layout Standard
|
---|
6443 |
|
---|
6444 | 15 0.665347460625295 -1.38542186932548
|
---|
6445 | \end_layout
|
---|
6446 |
|
---|
6447 | \begin_layout Standard
|
---|
6448 |
|
---|
6449 | 16 0.897108190646473 -4.97771318465375
|
---|
6450 | \end_layout
|
---|
6451 |
|
---|
6452 | \begin_layout Standard
|
---|
6453 |
|
---|
6454 | 17 0.527634627532446 1.11860060672770
|
---|
6455 | \end_layout
|
---|
6456 |
|
---|
6457 | \begin_layout Standard
|
---|
6458 |
|
---|
6459 | 18 0.591554662202600 0.000000000000000E+000
|
---|
6460 | \end_layout
|
---|
6461 |
|
---|
6462 | \begin_layout Standard
|
---|
6463 |
|
---|
6464 | 19 0.591554662202600 0.000000000000000E+000
|
---|
6465 | \end_layout
|
---|
6466 |
|
---|
6467 | \begin_layout Standard
|
---|
6468 |
|
---|
6469 | 20 0.591554662202600 0.000000000000000E+000
|
---|
6470 | \end_layout
|
---|
6471 |
|
---|
6472 | \begin_layout Standard
|
---|
6473 |
|
---|
6474 |
|
---|
6475 | \backslash
|
---|
6476 | end{verbatim}
|
---|
6477 | \end_layout
|
---|
6478 |
|
---|
6479 | \end_inset
|
---|
6480 |
|
---|
6481 |
|
---|
6482 | \end_layout
|
---|
6483 |
|
---|
6484 | \begin_layout Standard
|
---|
6485 | A test simulation of 100,000 Monte Carlo sweeps (using subroutine '
|
---|
6486 | \shape italic
|
---|
6487 | mulcan_sim
|
---|
6488 | \shape default
|
---|
6489 | ' with these weights led to the following histogram that is flat over the
|
---|
6490 | studied energy range (as is characteristic for the multicanonical ensemble)
|
---|
6491 | (note that the last energy bin contains all entries for energies larger/equal
|
---|
6492 | than 20 Kcal/mol):
|
---|
6493 | \end_layout
|
---|
6494 |
|
---|
6495 | \begin_layout Standard
|
---|
6496 | \begin_inset ERT
|
---|
6497 | status open
|
---|
6498 |
|
---|
6499 | \begin_layout Standard
|
---|
6500 |
|
---|
6501 |
|
---|
6502 | \backslash
|
---|
6503 | begin{verbatim}
|
---|
6504 | \end_layout
|
---|
6505 |
|
---|
6506 | \begin_layout Standard
|
---|
6507 |
|
---|
6508 | -9 105
|
---|
6509 | \end_layout
|
---|
6510 |
|
---|
6511 | \begin_layout Standard
|
---|
6512 |
|
---|
6513 | -8 828
|
---|
6514 | \end_layout
|
---|
6515 |
|
---|
6516 | \begin_layout Standard
|
---|
6517 |
|
---|
6518 | -7 1945
|
---|
6519 | \end_layout
|
---|
6520 |
|
---|
6521 | \begin_layout Standard
|
---|
6522 |
|
---|
6523 | -6 3108
|
---|
6524 | \end_layout
|
---|
6525 |
|
---|
6526 | \begin_layout Standard
|
---|
6527 |
|
---|
6528 | -5 3247
|
---|
6529 | \end_layout
|
---|
6530 |
|
---|
6531 | \begin_layout Standard
|
---|
6532 |
|
---|
6533 | -4 3054
|
---|
6534 | \end_layout
|
---|
6535 |
|
---|
6536 | \begin_layout Standard
|
---|
6537 |
|
---|
6538 | -3 2844
|
---|
6539 | \end_layout
|
---|
6540 |
|
---|
6541 | \begin_layout Standard
|
---|
6542 |
|
---|
6543 | -2 2531
|
---|
6544 | \end_layout
|
---|
6545 |
|
---|
6546 | \begin_layout Standard
|
---|
6547 |
|
---|
6548 | -1 2397
|
---|
6549 | \end_layout
|
---|
6550 |
|
---|
6551 | \begin_layout Standard
|
---|
6552 |
|
---|
6553 | 0 2082
|
---|
6554 | \end_layout
|
---|
6555 |
|
---|
6556 | \begin_layout Standard
|
---|
6557 |
|
---|
6558 | 1 2179
|
---|
6559 | \end_layout
|
---|
6560 |
|
---|
6561 | \begin_layout Standard
|
---|
6562 |
|
---|
6563 | 2 2294
|
---|
6564 | \end_layout
|
---|
6565 |
|
---|
6566 | \begin_layout Standard
|
---|
6567 |
|
---|
6568 | 3 2579
|
---|
6569 | \end_layout
|
---|
6570 |
|
---|
6571 | \begin_layout Standard
|
---|
6572 |
|
---|
6573 | 4 3193
|
---|
6574 | \end_layout
|
---|
6575 |
|
---|
6576 | \begin_layout Standard
|
---|
6577 |
|
---|
6578 | 5 2855
|
---|
6579 | \end_layout
|
---|
6580 |
|
---|
6581 | \begin_layout Standard
|
---|
6582 |
|
---|
6583 | 6 2927
|
---|
6584 | \end_layout
|
---|
6585 |
|
---|
6586 | \begin_layout Standard
|
---|
6587 |
|
---|
6588 | 7 3994
|
---|
6589 | \end_layout
|
---|
6590 |
|
---|
6591 | \begin_layout Standard
|
---|
6592 |
|
---|
6593 | 8 3362
|
---|
6594 | \end_layout
|
---|
6595 |
|
---|
6596 | \begin_layout Standard
|
---|
6597 |
|
---|
6598 | 9 3047
|
---|
6599 | \end_layout
|
---|
6600 |
|
---|
6601 | \begin_layout Standard
|
---|
6602 |
|
---|
6603 | 10 3289
|
---|
6604 | \end_layout
|
---|
6605 |
|
---|
6606 | \begin_layout Standard
|
---|
6607 |
|
---|
6608 | 11 3199
|
---|
6609 | \end_layout
|
---|
6610 |
|
---|
6611 | \begin_layout Standard
|
---|
6612 |
|
---|
6613 | 12 3412
|
---|
6614 | \end_layout
|
---|
6615 |
|
---|
6616 | \begin_layout Standard
|
---|
6617 |
|
---|
6618 | 13 3034
|
---|
6619 | \end_layout
|
---|
6620 |
|
---|
6621 | \begin_layout Standard
|
---|
6622 |
|
---|
6623 | 14 3092
|
---|
6624 | \end_layout
|
---|
6625 |
|
---|
6626 | \begin_layout Standard
|
---|
6627 |
|
---|
6628 | 15 3258
|
---|
6629 | \end_layout
|
---|
6630 |
|
---|
6631 | \begin_layout Standard
|
---|
6632 |
|
---|
6633 | 16 3079
|
---|
6634 | \end_layout
|
---|
6635 |
|
---|
6636 | \begin_layout Standard
|
---|
6637 |
|
---|
6638 | 17 2957
|
---|
6639 | \end_layout
|
---|
6640 |
|
---|
6641 | \begin_layout Standard
|
---|
6642 |
|
---|
6643 | 18 3157
|
---|
6644 | \end_layout
|
---|
6645 |
|
---|
6646 | \begin_layout Standard
|
---|
6647 |
|
---|
6648 | 19 3055
|
---|
6649 | \end_layout
|
---|
6650 |
|
---|
6651 | \begin_layout Standard
|
---|
6652 |
|
---|
6653 | 20 19897
|
---|
6654 | \end_layout
|
---|
6655 |
|
---|
6656 | \begin_layout Standard
|
---|
6657 |
|
---|
6658 |
|
---|
6659 | \backslash
|
---|
6660 | end{verbatim}
|
---|
6661 | \end_layout
|
---|
6662 |
|
---|
6663 | \end_inset
|
---|
6664 |
|
---|
6665 |
|
---|
6666 | \end_layout
|
---|
6667 |
|
---|
6668 | \begin_layout Subsection
|
---|
6669 | Regularization of the B domain of protein A
|
---|
6670 | \begin_inset LatexCommand label
|
---|
6671 | name "sub:Regularization-of-the"
|
---|
6672 |
|
---|
6673 | \end_inset
|
---|
6674 |
|
---|
6675 |
|
---|
6676 | \end_layout
|
---|
6677 |
|
---|
6678 | \begin_layout Standard
|
---|
6679 | Frequently, one wants to compare the results of a simulation with experimental
|
---|
6680 | data.
|
---|
6681 | When we compare properties of calculated configurations with those of structure
|
---|
6682 | s from the Protein Data Bank (PDB), we have to remember that the actual
|
---|
6683 | bond lengths and angles in the PDB-structure will differ from the fixed
|
---|
6684 | values that are assumed with the ECEPP, FLEX, and Lund potentials.
|
---|
6685 | Forcing the molecule into the standard bonding geometry model may lead
|
---|
6686 | to un-physically high energies.
|
---|
6687 | The process of finding an optimal structure within the standard geometry
|
---|
6688 | model starting from a PDB-structure is called regularization.
|
---|
6689 | \end_layout
|
---|
6690 |
|
---|
6691 | \begin_layout Standard
|
---|
6692 | In our example, we regularize of the coordinates for residues 10-55 of the
|
---|
6693 | B domain of
|
---|
6694 | \shape italic
|
---|
6695 | Staphylococcus Aureus
|
---|
6696 | \shape default
|
---|
6697 | Protein A, which were taken from entry
|
---|
6698 | \shape italic
|
---|
6699 | 1BDD
|
---|
6700 | \shape default
|
---|
6701 | of the Protein Data Bank (see
|
---|
6702 | \begin_inset LatexCommand url
|
---|
6703 | target "http://www.rcsb.org"
|
---|
6704 |
|
---|
6705 | \end_inset
|
---|
6706 |
|
---|
6707 | ), as provided with this package in file
|
---|
6708 | \shape italic
|
---|
6709 | 1bdd.pdb
|
---|
6710 | \shape default
|
---|
6711 | .
|
---|
6712 | Setting the variable '
|
---|
6713 | \shape italic
|
---|
6714 | iabin = 0
|
---|
6715 | \shape default
|
---|
6716 | ' in
|
---|
6717 | \shape italic
|
---|
6718 | main.f
|
---|
6719 | \shape default
|
---|
6720 | makes
|
---|
6721 | \shape italic
|
---|
6722 | init_molecule
|
---|
6723 | \shape default
|
---|
6724 | call subroutine
|
---|
6725 | \shape italic
|
---|
6726 | pdbread
|
---|
6727 | \shape default
|
---|
6728 | that reads the amino acid sequence and the atomic coordinates from the
|
---|
6729 | PDB- structure and stores this data in arrays declared in '
|
---|
6730 | \shape italic
|
---|
6731 | INCP.H
|
---|
6732 | \shape default
|
---|
6733 | '.
|
---|
6734 | Then
|
---|
6735 | \shape italic
|
---|
6736 | pdbvars
|
---|
6737 | \shape default
|
---|
6738 | is automatically called to measure all dihedral angles.
|
---|
6739 | In order to regularize the PDB-structure one has to
|
---|
6740 | \shape italic
|
---|
6741 | call regul(nml, iter, nsteps,
|
---|
6742 | \begin_inset Formula $\varepsilon$
|
---|
6743 | \end_inset
|
---|
6744 |
|
---|
6745 | )
|
---|
6746 | \shape default
|
---|
6747 | as the task subroutine in '
|
---|
6748 | \shape italic
|
---|
6749 | main
|
---|
6750 | \shape default
|
---|
6751 | ' .
|
---|
6752 | Set the following parameters in '
|
---|
6753 | \shape italic
|
---|
6754 | main
|
---|
6755 | \shape default
|
---|
6756 | ', accordingly:
|
---|
6757 | \newline
|
---|
6758 |
|
---|
6759 | \newline
|
---|
6760 |
|
---|
6761 | \shape italic
|
---|
6762 | ientyp=0
|
---|
6763 | \newline
|
---|
6764 | sh2 = .false.
|
---|
6765 | \newline
|
---|
6766 | itysol = 0
|
---|
6767 | \newline
|
---|
6768 | iabin = 0
|
---|
6769 | \shape default
|
---|
6770 |
|
---|
6771 | \newline
|
---|
6772 |
|
---|
6773 | \newline
|
---|
6774 | Note that '
|
---|
6775 | \shape italic
|
---|
6776 | regul
|
---|
6777 | \shape default
|
---|
6778 | ', as any other task subroutine, has to be called AFTER '
|
---|
6779 | \shape italic
|
---|
6780 | init_molecule
|
---|
6781 | \shape default
|
---|
6782 | ' .
|
---|
6783 | The example is available in the EXAMPLES directory.
|
---|
6784 | You can compile it by calling
|
---|
6785 | \emph on
|
---|
6786 | make regularization.
|
---|
6787 |
|
---|
6788 | \emph default
|
---|
6789 | Run the program by calling
|
---|
6790 | \emph on
|
---|
6791 | regularization
|
---|
6792 | \emph default
|
---|
6793 | .
|
---|
6794 | We use 10 iterations with up to 15000 sweeps each and
|
---|
6795 | \begin_inset Formula $\varepsilon=10^{-7}$
|
---|
6796 | \end_inset
|
---|
6797 |
|
---|
6798 | .
|
---|
6799 | A value for
|
---|
6800 | \begin_inset Formula $\varepsilon$
|
---|
6801 | \end_inset
|
---|
6802 |
|
---|
6803 | that is too large may lead to numerical instabilities.
|
---|
6804 |
|
---|
6805 | \end_layout
|
---|
6806 |
|
---|
6807 | \begin_layout Standard
|
---|
6808 | First '
|
---|
6809 | \shape italic
|
---|
6810 | regul
|
---|
6811 | \shape default
|
---|
6812 | ' obtains its input from the arrays declared in '
|
---|
6813 | \shape italic
|
---|
6814 | INCP.H
|
---|
6815 | \shape default
|
---|
6816 | '.
|
---|
6817 | In a first step a naive representation of the molecule is build in the
|
---|
6818 | ECEPP geometry from the stored dihedral angles that were calculated from
|
---|
6819 | the PDB coordinates.
|
---|
6820 | This simple model serves as starting configuration for the regularization.
|
---|
6821 | In our example, its root-mean-square deviation (over all heave atoms) compared
|
---|
6822 | to the PDB-structure initially is 2.8
|
---|
6823 | \begin_inset ERT
|
---|
6824 | status collapsed
|
---|
6825 |
|
---|
6826 | \begin_layout Standard
|
---|
6827 |
|
---|
6828 |
|
---|
6829 | \backslash
|
---|
6830 | AA
|
---|
6831 | \end_layout
|
---|
6832 |
|
---|
6833 | \end_inset
|
---|
6834 |
|
---|
6835 | and its ECEPP-energy
|
---|
6836 | \begin_inset Formula $\approx10^{5}$
|
---|
6837 | \end_inset
|
---|
6838 |
|
---|
6839 | kcal/mol, mainly due to excessive van-der-Waals repulsions.
|
---|
6840 | The regularization starts by first minimizing a term that measures the
|
---|
6841 | sum of squared distances between heavy atoms in the SMMP-structure and
|
---|
6842 | the given PDB-structure.
|
---|
6843 | This leads to a rmsd of 0.14
|
---|
6844 | \begin_inset ERT
|
---|
6845 | status collapsed
|
---|
6846 |
|
---|
6847 | \begin_layout Standard
|
---|
6848 |
|
---|
6849 |
|
---|
6850 | \backslash
|
---|
6851 | AA
|
---|
6852 | \end_layout
|
---|
6853 |
|
---|
6854 | \end_inset
|
---|
6855 |
|
---|
6856 | .
|
---|
6857 | After this initial step a list of bad contacts (vdW-energy of more than
|
---|
6858 | 2 kcal/mol) in the SMMP-structure is printed out.
|
---|
6859 | In a second step the physical energy is minimized, allowing only the free
|
---|
6860 | hydrogens to move, and the bad contacts and rmsd are displayed again.
|
---|
6861 | This step reduces the ECEPP-energy to
|
---|
6862 | \begin_inset Formula $\approx10^{3}$
|
---|
6863 | \end_inset
|
---|
6864 |
|
---|
6865 | kcal/mol.
|
---|
6866 | '
|
---|
6867 | \shape italic
|
---|
6868 | Regul
|
---|
6869 | \shape default
|
---|
6870 | ' aims at further reducing this energy while at the same time keeping the
|
---|
6871 | rmsd as small as possible.
|
---|
6872 | This is done by minimizing a composite energy from the weighted sum of
|
---|
6873 | physical ECEPP-energy and constraint energy (the quadratic distance measure)
|
---|
6874 | over 10 iterations.
|
---|
6875 | In each iteration the weight of the constraint energy is successively lowered
|
---|
6876 | (from 1 to 0) and the weight of the ECEPP energy raised (from 0 to 1).
|
---|
6877 | At the end, the dihedral angles of the final structure are printed out
|
---|
6878 | together with its rmsd and a list of (eventually) remaining bad contacts.
|
---|
6879 | \end_layout
|
---|
6880 |
|
---|
6881 | \begin_layout Standard
|
---|
6882 | The following output is obtained from this last iteration with a weight
|
---|
6883 | of 1 for the ECEPP-energy and a weight of 0 for the constraint energy,
|
---|
6884 | that leads to a SMMP-configuration with a total ECEPP-energy of
|
---|
6885 | \begin_inset Formula $-429.9$
|
---|
6886 | \end_inset
|
---|
6887 |
|
---|
6888 | kcal/mol and a rmsd of 1.89
|
---|
6889 | \begin_inset ERT
|
---|
6890 | status inlined
|
---|
6891 |
|
---|
6892 | \begin_layout Standard
|
---|
6893 |
|
---|
6894 |
|
---|
6895 | \backslash
|
---|
6896 | AA
|
---|
6897 | \end_layout
|
---|
6898 |
|
---|
6899 | \end_inset
|
---|
6900 |
|
---|
6901 | , compared to the PDB-structure:
|
---|
6902 | \end_layout
|
---|
6903 |
|
---|
6904 | \begin_layout Standard
|
---|
6905 | \begin_inset ERT
|
---|
6906 | status open
|
---|
6907 |
|
---|
6908 | \begin_layout Standard
|
---|
6909 |
|
---|
6910 |
|
---|
6911 | \backslash
|
---|
6912 | begin{verbatim}
|
---|
6913 | \end_layout
|
---|
6914 |
|
---|
6915 | \begin_layout Standard
|
---|
6916 |
|
---|
6917 | ================ Minimization #10 Wt(energy) = 0.100E+01 Wt(regul.)
|
---|
6918 | = 0.000E+00
|
---|
6919 | \end_layout
|
---|
6920 |
|
---|
6921 | \begin_layout Standard
|
---|
6922 |
|
---|
6923 | \end_layout
|
---|
6924 |
|
---|
6925 | \begin_layout Standard
|
---|
6926 |
|
---|
6927 | \end_layout
|
---|
6928 |
|
---|
6929 | \begin_layout Standard
|
---|
6930 |
|
---|
6931 | Energy BEFORE minimization:
|
---|
6932 | \end_layout
|
---|
6933 |
|
---|
6934 | \begin_layout Standard
|
---|
6935 |
|
---|
6936 | \end_layout
|
---|
6937 |
|
---|
6938 | \begin_layout Standard
|
---|
6939 |
|
---|
6940 | Total: -0.39831E+03
|
---|
6941 | \end_layout
|
---|
6942 |
|
---|
6943 | \begin_layout Standard
|
---|
6944 |
|
---|
6945 | Coulomb: -0.4685E+02 Lennard-Jones: -0.3306E+03 HB: -0.6915E+02
|
---|
6946 | \end_layout
|
---|
6947 |
|
---|
6948 | \begin_layout Standard
|
---|
6949 |
|
---|
6950 | Variables: 0.4831E+02 Solvatation: 0.0000E+00 Regularization: 0.3315E+03
|
---|
6951 | \end_layout
|
---|
6952 |
|
---|
6953 | \begin_layout Standard
|
---|
6954 |
|
---|
6955 | \end_layout
|
---|
6956 |
|
---|
6957 | \begin_layout Standard
|
---|
6958 |
|
---|
6959 | Step 1: energy 0.259565E+13 ( 0.296722E+30, 0.363456E+12 )
|
---|
6960 | \end_layout
|
---|
6961 |
|
---|
6962 | \begin_layout Standard
|
---|
6963 |
|
---|
6964 | Step 2: energy 0.481884E+09 ( 0.572102E+22, 0.644342E+12 )
|
---|
6965 | \end_layout
|
---|
6966 |
|
---|
6967 | \begin_layout Standard
|
---|
6968 |
|
---|
6969 | Step 3: energy 0.444100E+10 ( 0.599018E+24, 0.617413E+12 )
|
---|
6970 | \end_layout
|
---|
6971 |
|
---|
6972 | \begin_layout Standard
|
---|
6973 |
|
---|
6974 | Step 4: energy 0.491253E+10 ( 0.220900E+25, 0.533540E+12 )
|
---|
6975 | \end_layout
|
---|
6976 |
|
---|
6977 | \begin_layout Standard
|
---|
6978 |
|
---|
6979 | Step 5: energy -0.355950E+03 ( 0.341264E+06, 0.495213E+10 )
|
---|
6980 | \end_layout
|
---|
6981 |
|
---|
6982 | \begin_layout Standard
|
---|
6983 |
|
---|
6984 | Step 6: energy -0.395467E+03 ( 0.762827E+06, 0.726715E+08 )
|
---|
6985 | \end_layout
|
---|
6986 |
|
---|
6987 | \begin_layout Standard
|
---|
6988 |
|
---|
6989 | Step 7: energy -0.398489E+03 ( 0.198935E+05, 0.137122E+08 )
|
---|
6990 | \end_layout
|
---|
6991 |
|
---|
6992 | \begin_layout Standard
|
---|
6993 |
|
---|
6994 | Step 8: energy -0.398761E+03 ( 0.409017E+05, 0.187175E+08 )
|
---|
6995 | \end_layout
|
---|
6996 |
|
---|
6997 | \begin_layout Standard
|
---|
6998 |
|
---|
6999 | Step 9: energy -0.399231E+03 ( 0.197834E+05, 0.329551E+08 )
|
---|
7000 | \end_layout
|
---|
7001 |
|
---|
7002 | \begin_layout Standard
|
---|
7003 |
|
---|
7004 | Step 10: energy -0.399787E+03 ( 0.143934E+06, 0.121392E+09 )
|
---|
7005 | \end_layout
|
---|
7006 |
|
---|
7007 | \begin_layout Standard
|
---|
7008 |
|
---|
7009 | ...
|
---|
7010 | \end_layout
|
---|
7011 |
|
---|
7012 | \begin_layout Standard
|
---|
7013 |
|
---|
7014 | ...
|
---|
7015 | \end_layout
|
---|
7016 |
|
---|
7017 | \begin_layout Standard
|
---|
7018 |
|
---|
7019 | ...
|
---|
7020 | \end_layout
|
---|
7021 |
|
---|
7022 | \begin_layout Standard
|
---|
7023 |
|
---|
7024 | Step 415: energy -0.429868E+03 ( 0.135007E-03, 0.523386E+11 )
|
---|
7025 | \end_layout
|
---|
7026 |
|
---|
7027 | \begin_layout Standard
|
---|
7028 |
|
---|
7029 | Step 416: energy -0.429868E+03 ( 0.123681E-04, 0.523385E+11 )
|
---|
7030 | \end_layout
|
---|
7031 |
|
---|
7032 | \begin_layout Standard
|
---|
7033 |
|
---|
7034 | Step 417: energy -0.429868E+03 ( 0.254870E-05, 0.523385E+11 )
|
---|
7035 | \end_layout
|
---|
7036 |
|
---|
7037 | \begin_layout Standard
|
---|
7038 |
|
---|
7039 | Step 418: energy -0.429868E+03 ( 0.193334E-05, 0.523385E+11 )
|
---|
7040 | \end_layout
|
---|
7041 |
|
---|
7042 | \begin_layout Standard
|
---|
7043 |
|
---|
7044 | Step 419: energy -0.429868E+03 ( 0.140748E-05, 0.523385E+11 )
|
---|
7045 | \end_layout
|
---|
7046 |
|
---|
7047 | \begin_layout Standard
|
---|
7048 |
|
---|
7049 | Step 420: energy -0.429868E+03 ( 0.740869E-06, 0.523384E+11 )
|
---|
7050 | \end_layout
|
---|
7051 |
|
---|
7052 | \begin_layout Standard
|
---|
7053 |
|
---|
7054 | Step 421: energy -0.429868E+03 ( 0.489693E-06, 0.523384E+11 )
|
---|
7055 | \end_layout
|
---|
7056 |
|
---|
7057 | \begin_layout Standard
|
---|
7058 |
|
---|
7059 | Step 422: energy -0.429868E+03 ( 0.282056E-06, 0.523384E+11 )
|
---|
7060 | \end_layout
|
---|
7061 |
|
---|
7062 | \begin_layout Standard
|
---|
7063 |
|
---|
7064 | Step 423: energy -0.429868E+03 ( 0.104563E-06, 0.523384E+11 )
|
---|
7065 | \end_layout
|
---|
7066 |
|
---|
7067 | \begin_layout Standard
|
---|
7068 |
|
---|
7069 | Step 424: energy -0.429868E+03 ( 0.519142E-07, 0.523385E+11 )
|
---|
7070 | \end_layout
|
---|
7071 |
|
---|
7072 | \begin_layout Standard
|
---|
7073 |
|
---|
7074 | Step 425: energy -0.429868E+03 ( 0.104563E-06, 0.523384E+11 )
|
---|
7075 | \end_layout
|
---|
7076 |
|
---|
7077 | \begin_layout Standard
|
---|
7078 |
|
---|
7079 | ---- CONVERGENCE ----
|
---|
7080 | \end_layout
|
---|
7081 |
|
---|
7082 | \begin_layout Standard
|
---|
7083 |
|
---|
7084 | \end_layout
|
---|
7085 |
|
---|
7086 | \begin_layout Standard
|
---|
7087 |
|
---|
7088 | Final energies __________________________________________________
|
---|
7089 | \end_layout
|
---|
7090 |
|
---|
7091 | \begin_layout Standard
|
---|
7092 |
|
---|
7093 | \end_layout
|
---|
7094 |
|
---|
7095 | \begin_layout Standard
|
---|
7096 |
|
---|
7097 | Total: -0.42987E+03
|
---|
7098 | \end_layout
|
---|
7099 |
|
---|
7100 | \begin_layout Standard
|
---|
7101 |
|
---|
7102 | Coulomb: -0.5431E+02 Lennard-Jones: -0.3510E+03 HB: -0.7268E+02
|
---|
7103 | \end_layout
|
---|
7104 |
|
---|
7105 | \begin_layout Standard
|
---|
7106 |
|
---|
7107 | Variables: 0.4809E+02 Solvatation: 0.0000E+00 Regularization: 0.2241E+05
|
---|
7108 | \end_layout
|
---|
7109 |
|
---|
7110 | \begin_layout Standard
|
---|
7111 |
|
---|
7112 | ...
|
---|
7113 | \end_layout
|
---|
7114 |
|
---|
7115 | \begin_layout Standard
|
---|
7116 |
|
---|
7117 |
|
---|
7118 | \end_layout
|
---|
7119 |
|
---|
7120 | \begin_layout Standard
|
---|
7121 |
|
---|
7122 | RMSD = 1.89099626258629
|
---|
7123 | \end_layout
|
---|
7124 |
|
---|
7125 | \begin_layout Standard
|
---|
7126 |
|
---|
7127 | \end_layout
|
---|
7128 |
|
---|
7129 | \begin_layout Standard
|
---|
7130 |
|
---|
7131 |
|
---|
7132 | \backslash
|
---|
7133 | end{verbatim}
|
---|
7134 | \end_layout
|
---|
7135 |
|
---|
7136 | \end_inset
|
---|
7137 |
|
---|
7138 |
|
---|
7139 | \end_layout
|
---|
7140 |
|
---|
7141 | \begin_layout Subsection
|
---|
7142 | Parallel Tempering simulation of four A
|
---|
7143 | \begin_inset Formula $\beta_{16-22}$
|
---|
7144 | \end_inset
|
---|
7145 |
|
---|
7146 | peptides
|
---|
7147 | \begin_inset LatexCommand label
|
---|
7148 | name "sub:Parallel-Tempering-simulation"
|
---|
7149 |
|
---|
7150 | \end_inset
|
---|
7151 |
|
---|
7152 |
|
---|
7153 | \end_layout
|
---|
7154 |
|
---|
7155 | \begin_layout Standard
|
---|
7156 | In the following example, a parallel tempering simulation of the fragment
|
---|
7157 | 16--22 of Alzheimer's
|
---|
7158 | \begin_inset Formula $\beta$
|
---|
7159 | \end_inset
|
---|
7160 |
|
---|
7161 | -amyloid in solvent.
|
---|
7162 | It relies on the ECEPP/3 force-field and all dihedral angles are free.
|
---|
7163 | References for the algorithm can be found in
|
---|
7164 | \begin_inset LatexCommand cite
|
---|
7165 | key "Eisenmenger2001"
|
---|
7166 |
|
---|
7167 | \end_inset
|
---|
7168 |
|
---|
7169 | .
|
---|
7170 | The simulation is performed on a parallel computer on
|
---|
7171 | \begin_inset Formula $n\times8$
|
---|
7172 | \end_inset
|
---|
7173 |
|
---|
7174 | processors.
|
---|
7175 | The example is available in the EXAMPLES directory as
|
---|
7176 | \emph on
|
---|
7177 | parallel_tempering_p
|
---|
7178 | \emph default
|
---|
7179 | .
|
---|
7180 | Commpile it using
|
---|
7181 | \emph on
|
---|
7182 | make parallel_tempering
|
---|
7183 | \emph default
|
---|
7184 | .
|
---|
7185 | Set the following parameters
|
---|
7186 | \end_layout
|
---|
7187 |
|
---|
7188 | \begin_layout Standard
|
---|
7189 | \begin_inset ERT
|
---|
7190 | status open
|
---|
7191 |
|
---|
7192 | \begin_layout Standard
|
---|
7193 |
|
---|
7194 |
|
---|
7195 | \backslash
|
---|
7196 | begin{verbatim}
|
---|
7197 | \end_layout
|
---|
7198 |
|
---|
7199 | \begin_layout Standard
|
---|
7200 |
|
---|
7201 | num_replica = 8
|
---|
7202 | \end_layout
|
---|
7203 |
|
---|
7204 | \begin_layout Standard
|
---|
7205 |
|
---|
7206 | ientyp = 0
|
---|
7207 | \end_layout
|
---|
7208 |
|
---|
7209 | \begin_layout Standard
|
---|
7210 |
|
---|
7211 | sh2=.false.
|
---|
7212 | \end_layout
|
---|
7213 |
|
---|
7214 | \begin_layout Standard
|
---|
7215 |
|
---|
7216 | itysol=1
|
---|
7217 | \end_layout
|
---|
7218 |
|
---|
7219 | \begin_layout Standard
|
---|
7220 |
|
---|
7221 |
|
---|
7222 | \backslash
|
---|
7223 | end{verbatim}
|
---|
7224 | \end_layout
|
---|
7225 |
|
---|
7226 | \end_inset
|
---|
7227 |
|
---|
7228 |
|
---|
7229 | \end_layout
|
---|
7230 |
|
---|
7231 | \begin_layout Standard
|
---|
7232 | After initialization, the program calls
|
---|
7233 | \emph on
|
---|
7234 | init_molecule
|
---|
7235 | \emph default
|
---|
7236 | once for every molecule.
|
---|
7237 | Only the last call contains a reference to a variable file.
|
---|
7238 | It contains the global coordinates for each molecule
|
---|
7239 | \end_layout
|
---|
7240 |
|
---|
7241 | \begin_layout Standard
|
---|
7242 | \begin_inset ERT
|
---|
7243 | status open
|
---|
7244 |
|
---|
7245 | \begin_layout Standard
|
---|
7246 |
|
---|
7247 |
|
---|
7248 | \backslash
|
---|
7249 | begin{verbatim}
|
---|
7250 | \end_layout
|
---|
7251 |
|
---|
7252 | \begin_layout Standard
|
---|
7253 |
|
---|
7254 | @ 1 : 100, 100, 100, 0, 0, 0
|
---|
7255 | \end_layout
|
---|
7256 |
|
---|
7257 | \begin_layout Standard
|
---|
7258 |
|
---|
7259 | @ 2 : -100, -100, -100, 0, 0, 0
|
---|
7260 | \end_layout
|
---|
7261 |
|
---|
7262 | \begin_layout Standard
|
---|
7263 |
|
---|
7264 | @ 3 : 100, -100, 100, 0, 0, 0
|
---|
7265 | \end_layout
|
---|
7266 |
|
---|
7267 | \begin_layout Standard
|
---|
7268 |
|
---|
7269 | @ 4 : 100, -100, -100, 0, 0, 0
|
---|
7270 | \end_layout
|
---|
7271 |
|
---|
7272 | \begin_layout Standard
|
---|
7273 |
|
---|
7274 |
|
---|
7275 | \backslash
|
---|
7276 | end{verbatim}
|
---|
7277 | \end_layout
|
---|
7278 |
|
---|
7279 | \end_inset
|
---|
7280 |
|
---|
7281 |
|
---|
7282 | \end_layout
|
---|
7283 |
|
---|
7284 | \begin_layout Standard
|
---|
7285 | The subroutine reads the distribution of temperatures (in our example 'temperatu
|
---|
7286 | res_abeta') that has to be provided.
|
---|
7287 | \end_layout
|
---|
7288 |
|
---|
7289 | \begin_layout Standard
|
---|
7290 | The simulation starts from a stretched configuration with 100 sweeps for
|
---|
7291 | equilibration.
|
---|
7292 | The molecule is then studied over 10,000 sweeps on each node, with measurements
|
---|
7293 | taken every 10 sweep.
|
---|
7294 |
|
---|
7295 | \end_layout
|
---|
7296 |
|
---|
7297 | \begin_layout Standard
|
---|
7298 | Hence the following arguments have to be passed
|
---|
7299 | \end_layout
|
---|
7300 |
|
---|
7301 | \begin_layout Standard
|
---|
7302 | \begin_inset ERT
|
---|
7303 | status open
|
---|
7304 |
|
---|
7305 | \begin_layout Standard
|
---|
7306 |
|
---|
7307 |
|
---|
7308 | \backslash
|
---|
7309 | begin{verbatim}
|
---|
7310 | \end_layout
|
---|
7311 |
|
---|
7312 | \begin_layout Standard
|
---|
7313 |
|
---|
7314 | nequi=100
|
---|
7315 | \end_layout
|
---|
7316 |
|
---|
7317 | \begin_layout Standard
|
---|
7318 |
|
---|
7319 | nswp=10000
|
---|
7320 | \end_layout
|
---|
7321 |
|
---|
7322 | \begin_layout Standard
|
---|
7323 |
|
---|
7324 | nmes=10
|
---|
7325 | \end_layout
|
---|
7326 |
|
---|
7327 | \begin_layout Standard
|
---|
7328 |
|
---|
7329 | nsave=1000
|
---|
7330 | \end_layout
|
---|
7331 |
|
---|
7332 | \begin_layout Standard
|
---|
7333 |
|
---|
7334 | switch=0
|
---|
7335 | \end_layout
|
---|
7336 |
|
---|
7337 | \begin_layout Standard
|
---|
7338 |
|
---|
7339 | newsta=.true.
|
---|
7340 | \end_layout
|
---|
7341 |
|
---|
7342 | \begin_layout Standard
|
---|
7343 |
|
---|
7344 |
|
---|
7345 | \backslash
|
---|
7346 | end{verbatim}
|
---|
7347 | \end_layout
|
---|
7348 |
|
---|
7349 | \end_inset
|
---|
7350 |
|
---|
7351 | by calling
|
---|
7352 | \emph on
|
---|
7353 | partem_p(num_replica, nequi, nswp, nmes, nsave, newsta, switch, rep_id,
|
---|
7354 | partem_comm).
|
---|
7355 | \end_layout
|
---|
7356 |
|
---|
7357 | \begin_layout Standard
|
---|
7358 | After compiling with
|
---|
7359 | \emph on
|
---|
7360 | make parallel_tempering
|
---|
7361 | \emph default
|
---|
7362 | the program is ready to run.
|
---|
7363 | Note that you must first execute
|
---|
7364 | \emph on
|
---|
7365 | make parallel
|
---|
7366 | \emph default
|
---|
7367 | in the top-level directory.
|
---|
7368 | We do not provide a script to launch the program since launching it depends
|
---|
7369 | on the specific MPI installation.
|
---|
7370 | The data are written into the file '
|
---|
7371 | \shape italic
|
---|
7372 | ts.d
|
---|
7373 | \shape default
|
---|
7374 | '.
|
---|
7375 | In our case, the data are the sweep, the temperature index, the index of
|
---|
7376 | the replica this temperature is currently associated, the inverse temperature,
|
---|
7377 | and energy, radius-of gyration, number of residues that are part of a helix
|
---|
7378 | or sheet, number of hydrogen bond, total number of contacts and the number
|
---|
7379 | of contacts that appear also in the reference configuration:
|
---|
7380 | \begin_inset ERT
|
---|
7381 | status open
|
---|
7382 |
|
---|
7383 | \begin_layout Standard
|
---|
7384 |
|
---|
7385 |
|
---|
7386 | \backslash
|
---|
7387 | begin{verbatim}
|
---|
7388 | \end_layout
|
---|
7389 |
|
---|
7390 | \begin_layout Standard
|
---|
7391 |
|
---|
7392 | 10 1 1 0.503086435280445
|
---|
7393 | \end_layout
|
---|
7394 |
|
---|
7395 | \begin_layout Standard
|
---|
7396 |
|
---|
7397 | 18.5259057594418 -101.020909189261 1.668390368424223E-004
|
---|
7398 | \end_layout
|
---|
7399 |
|
---|
7400 | \begin_layout Standard
|
---|
7401 |
|
---|
7402 | 153.870626474863 3 4 0
|
---|
7403 | \end_layout
|
---|
7404 |
|
---|
7405 | \begin_layout Standard
|
---|
7406 |
|
---|
7407 | 10 2 2 0.838477392134076
|
---|
7408 | \end_layout
|
---|
7409 |
|
---|
7410 | \begin_layout Standard
|
---|
7411 |
|
---|
7412 | -21.8597428563679 -112.839132565408 4.398819716124160E-005
|
---|
7413 | \end_layout
|
---|
7414 |
|
---|
7415 | \begin_layout Standard
|
---|
7416 |
|
---|
7417 | 164.067677362049 0 12 0
|
---|
7418 | \end_layout
|
---|
7419 |
|
---|
7420 | \begin_layout Standard
|
---|
7421 |
|
---|
7422 | 10 3 3 1.25771608820111
|
---|
7423 | \end_layout
|
---|
7424 |
|
---|
7425 | \begin_layout Standard
|
---|
7426 |
|
---|
7427 | -63.6878966409724 -115.697268416431 7.324283587028595E-005
|
---|
7428 | \end_layout
|
---|
7429 |
|
---|
7430 | \begin_layout Standard
|
---|
7431 |
|
---|
7432 | 162.383801785309 2 9 0
|
---|
7433 | \end_layout
|
---|
7434 |
|
---|
7435 | \begin_layout Standard
|
---|
7436 |
|
---|
7437 | 10 4 4 1.43738981508699
|
---|
7438 | \end_layout
|
---|
7439 |
|
---|
7440 | \begin_layout Standard
|
---|
7441 |
|
---|
7442 | -82.2329362395502 -118.850435462771 -2.589501558808733E-005
|
---|
7443 | \end_layout
|
---|
7444 |
|
---|
7445 | \begin_layout Standard
|
---|
7446 |
|
---|
7447 | 155.367430914339 3 8 0
|
---|
7448 | \end_layout
|
---|
7449 |
|
---|
7450 | \begin_layout Standard
|
---|
7451 |
|
---|
7452 | 10 5 5 1.67695478426815
|
---|
7453 | \end_layout
|
---|
7454 |
|
---|
7455 | \begin_layout Standard
|
---|
7456 |
|
---|
7457 | -89.8268073782128 -115.511880821486 -1.910806982598894E-004
|
---|
7458 | \end_layout
|
---|
7459 |
|
---|
7460 | \begin_layout Standard
|
---|
7461 |
|
---|
7462 | 156.197401324212 1 13 0
|
---|
7463 | \end_layout
|
---|
7464 |
|
---|
7465 | \begin_layout Standard
|
---|
7466 |
|
---|
7467 | 10 6 6 1.82940521920162
|
---|
7468 | \end_layout
|
---|
7469 |
|
---|
7470 | \begin_layout Standard
|
---|
7471 |
|
---|
7472 | -102.200054103571 -119.664523580541 -2.902461830424936E-005
|
---|
7473 | \end_layout
|
---|
7474 |
|
---|
7475 | \begin_layout Standard
|
---|
7476 |
|
---|
7477 | 158.377278261187 1 7 0
|
---|
7478 | \end_layout
|
---|
7479 |
|
---|
7480 | \begin_layout Standard
|
---|
7481 |
|
---|
7482 | 10 7 7 1.92017723389483
|
---|
7483 | \end_layout
|
---|
7484 |
|
---|
7485 | \begin_layout Standard
|
---|
7486 |
|
---|
7487 | -92.5898004594444 -111.866857243732 8.412738265616228E-005
|
---|
7488 | \end_layout
|
---|
7489 |
|
---|
7490 | \begin_layout Standard
|
---|
7491 |
|
---|
7492 | 156.691206902137 2 13 0
|
---|
7493 | \end_layout
|
---|
7494 |
|
---|
7495 | \begin_layout Standard
|
---|
7496 |
|
---|
7497 | 10 8 8 2.01234574112178
|
---|
7498 | \end_layout
|
---|
7499 |
|
---|
7500 | \begin_layout Standard
|
---|
7501 |
|
---|
7502 | -91.7374330640579 -118.481236403476 -1.450348059239640E-004
|
---|
7503 | \end_layout
|
---|
7504 |
|
---|
7505 | \begin_layout Standard
|
---|
7506 |
|
---|
7507 | 160.611273802438 0 9 0
|
---|
7508 | \end_layout
|
---|
7509 |
|
---|
7510 | \begin_layout Standard
|
---|
7511 |
|
---|
7512 | ...
|
---|
7513 | \end_layout
|
---|
7514 |
|
---|
7515 | \begin_layout Standard
|
---|
7516 |
|
---|
7517 | ...
|
---|
7518 | \end_layout
|
---|
7519 |
|
---|
7520 | \begin_layout Standard
|
---|
7521 |
|
---|
7522 | ...
|
---|
7523 | \end_layout
|
---|
7524 |
|
---|
7525 | \begin_layout Standard
|
---|
7526 |
|
---|
7527 | 10000 1 2 0.503086435280445
|
---|
7528 | \end_layout
|
---|
7529 |
|
---|
7530 | \begin_layout Standard
|
---|
7531 |
|
---|
7532 | 25.7121801637793 -112.113204586669 -7.981375910951304E-005
|
---|
7533 | \end_layout
|
---|
7534 |
|
---|
7535 | \begin_layout Standard
|
---|
7536 |
|
---|
7537 | 171.130731978089 0 5 0
|
---|
7538 | \end_layout
|
---|
7539 |
|
---|
7540 | \begin_layout Standard
|
---|
7541 |
|
---|
7542 | 10000 2 4 0.838477392134076
|
---|
7543 | \end_layout
|
---|
7544 |
|
---|
7545 | \begin_layout Standard
|
---|
7546 |
|
---|
7547 | -83.1513580270155 -119.884471326212 -3.185178277838820E-005
|
---|
7548 | \end_layout
|
---|
7549 |
|
---|
7550 | \begin_layout Standard
|
---|
7551 |
|
---|
7552 | 179.222034577900 4 5 0
|
---|
7553 | \end_layout
|
---|
7554 |
|
---|
7555 | \begin_layout Standard
|
---|
7556 |
|
---|
7557 | 10000 3 3 1.25771608820111
|
---|
7558 | \end_layout
|
---|
7559 |
|
---|
7560 | \begin_layout Standard
|
---|
7561 |
|
---|
7562 | -88.7115772801244 -109.660390359632 2.816222447889407E-005
|
---|
7563 | \end_layout
|
---|
7564 |
|
---|
7565 | \begin_layout Standard
|
---|
7566 |
|
---|
7567 | 169.412616033656 6 2 0
|
---|
7568 | \end_layout
|
---|
7569 |
|
---|
7570 | \begin_layout Standard
|
---|
7571 |
|
---|
7572 | 10000 4 1 1.43738981508699
|
---|
7573 | \end_layout
|
---|
7574 |
|
---|
7575 | \begin_layout Standard
|
---|
7576 |
|
---|
7577 | -117.230892149812 -118.180458392844 -1.362571932424056E-004
|
---|
7578 | \end_layout
|
---|
7579 |
|
---|
7580 | \begin_layout Standard
|
---|
7581 |
|
---|
7582 | 155.662046672612 9 3 0
|
---|
7583 | \end_layout
|
---|
7584 |
|
---|
7585 | \begin_layout Standard
|
---|
7586 |
|
---|
7587 | 10000 5 5 1.67695478426815
|
---|
7588 | \end_layout
|
---|
7589 |
|
---|
7590 | \begin_layout Standard
|
---|
7591 |
|
---|
7592 | -117.452066538358 -114.923193931984 9.292455852280616E-005
|
---|
7593 | \end_layout
|
---|
7594 |
|
---|
7595 | \begin_layout Standard
|
---|
7596 |
|
---|
7597 | 165.838174859018 8 4 0
|
---|
7598 | \end_layout
|
---|
7599 |
|
---|
7600 | \begin_layout Standard
|
---|
7601 |
|
---|
7602 | 10000 6 8 1.82940521920162
|
---|
7603 | \end_layout
|
---|
7604 |
|
---|
7605 | \begin_layout Standard
|
---|
7606 |
|
---|
7607 | -114.553279087787 -116.322737335011 1.354655604376923E-005
|
---|
7608 | \end_layout
|
---|
7609 |
|
---|
7610 | \begin_layout Standard
|
---|
7611 |
|
---|
7612 | 161.094515087733 4 4 0
|
---|
7613 | \end_layout
|
---|
7614 |
|
---|
7615 | \begin_layout Standard
|
---|
7616 |
|
---|
7617 | 10000 7 7 1.92017723389483
|
---|
7618 | \end_layout
|
---|
7619 |
|
---|
7620 | \begin_layout Standard
|
---|
7621 |
|
---|
7622 | -128.613090309274 -113.083234658370 6.618583172642824E-005
|
---|
7623 | \end_layout
|
---|
7624 |
|
---|
7625 | \begin_layout Standard
|
---|
7626 |
|
---|
7627 | 169.226190038938 10 0 0
|
---|
7628 | \end_layout
|
---|
7629 |
|
---|
7630 | \begin_layout Standard
|
---|
7631 |
|
---|
7632 | 10000 8 6 2.01234574112178
|
---|
7633 | \end_layout
|
---|
7634 |
|
---|
7635 | \begin_layout Standard
|
---|
7636 |
|
---|
7637 | -116.001290834057 -115.250965599594 8.095072332381373E-005
|
---|
7638 | \end_layout
|
---|
7639 |
|
---|
7640 | \begin_layout Standard
|
---|
7641 |
|
---|
7642 | 169.725277983610 8 4 0
|
---|
7643 | \end_layout
|
---|
7644 |
|
---|
7645 | \begin_layout Standard
|
---|
7646 |
|
---|
7647 | \end_layout
|
---|
7648 |
|
---|
7649 | \begin_layout Standard
|
---|
7650 |
|
---|
7651 |
|
---|
7652 | \backslash
|
---|
7653 | end{verbatim}
|
---|
7654 | \end_layout
|
---|
7655 |
|
---|
7656 | \end_inset
|
---|
7657 |
|
---|
7658 |
|
---|
7659 | \end_layout
|
---|
7660 |
|
---|
7661 | \begin_layout Standard
|
---|
7662 | At the end of the simulation, the final configurations are written into
|
---|
7663 | external files (in our case '
|
---|
7664 | \shape italic
|
---|
7665 | conf_00??
|
---|
7666 | \shape default
|
---|
7667 | ' where '??' marks the replica index.
|
---|
7668 | Further information for re-starts are written into '
|
---|
7669 | \shape italic
|
---|
7670 | par_R.in
|
---|
7671 | \shape default
|
---|
7672 | ' that also collects statistics on the run.
|
---|
7673 |
|
---|
7674 | \end_layout
|
---|
7675 |
|
---|
7676 | \begin_layout Subsection
|
---|
7677 | Parallel tempering on a serial machine.
|
---|
7678 | \begin_inset LatexCommand label
|
---|
7679 | name "sub:Parallel-tempering-on"
|
---|
7680 |
|
---|
7681 | \end_inset
|
---|
7682 |
|
---|
7683 |
|
---|
7684 | \end_layout
|
---|
7685 |
|
---|
7686 | \begin_layout Standard
|
---|
7687 | Parallel tempering is useful even if you have only a single processor machine
|
---|
7688 | available.
|
---|
7689 | The algorithm provides better convergence than canonical Monte Carlo and
|
---|
7690 | avoids the scheduling problems of simulated annealing.
|
---|
7691 | In this example (see
|
---|
7692 | \emph on
|
---|
7693 | parallel_tempering_s.f
|
---|
7694 | \emph default
|
---|
7695 | in the
|
---|
7696 | \emph on
|
---|
7697 | EXAMPLES
|
---|
7698 | \emph default
|
---|
7699 | sub directory), we perform a parallel tempering simulation on Met-enkaphalin
|
---|
7700 | using 5 replicas.
|
---|
7701 | Each replica runs at a different temperature.
|
---|
7702 | The temperatures are read in from the file
|
---|
7703 | \emph on
|
---|
7704 | temperatures
|
---|
7705 | \emph default
|
---|
7706 | .
|
---|
7707 | The values are
|
---|
7708 | \end_layout
|
---|
7709 |
|
---|
7710 | \begin_layout Standard
|
---|
7711 | \begin_inset ERT
|
---|
7712 | status open
|
---|
7713 |
|
---|
7714 | \begin_layout Standard
|
---|
7715 |
|
---|
7716 |
|
---|
7717 | \backslash
|
---|
7718 | begin{verbatim}
|
---|
7719 | \end_layout
|
---|
7720 |
|
---|
7721 | \begin_layout Standard
|
---|
7722 |
|
---|
7723 | 1 1000
|
---|
7724 | \end_layout
|
---|
7725 |
|
---|
7726 | \begin_layout Standard
|
---|
7727 |
|
---|
7728 | 2 600
|
---|
7729 | \end_layout
|
---|
7730 |
|
---|
7731 | \begin_layout Standard
|
---|
7732 |
|
---|
7733 | 3 400
|
---|
7734 | \end_layout
|
---|
7735 |
|
---|
7736 | \begin_layout Standard
|
---|
7737 |
|
---|
7738 | 4 300
|
---|
7739 | \end_layout
|
---|
7740 |
|
---|
7741 | \begin_layout Standard
|
---|
7742 |
|
---|
7743 | 5 250.
|
---|
7744 | \end_layout
|
---|
7745 |
|
---|
7746 | \begin_layout Standard
|
---|
7747 |
|
---|
7748 |
|
---|
7749 | \backslash
|
---|
7750 | end{verbatim}
|
---|
7751 | \end_layout
|
---|
7752 |
|
---|
7753 | \end_inset
|
---|
7754 |
|
---|
7755 | We start the simulation from randomized configurations with 100 sweeps
|
---|
7756 | for equilibration before we exchange any replicas.
|
---|
7757 | The main simulation takes 10,000 sweeps with measurements taken every 10
|
---|
7758 | sweeps.
|
---|
7759 | An exchange of replicas is also attempted every 10 sweeps.
|
---|
7760 | This gives us the following variables
|
---|
7761 | \end_layout
|
---|
7762 |
|
---|
7763 | \begin_layout Standard
|
---|
7764 | \begin_inset ERT
|
---|
7765 | status open
|
---|
7766 |
|
---|
7767 | \begin_layout Standard
|
---|
7768 |
|
---|
7769 |
|
---|
7770 | \backslash
|
---|
7771 | begin{verbatim}
|
---|
7772 | \end_layout
|
---|
7773 |
|
---|
7774 | \begin_layout Standard
|
---|
7775 |
|
---|
7776 | num_rep = 5
|
---|
7777 | \end_layout
|
---|
7778 |
|
---|
7779 | \begin_layout Standard
|
---|
7780 |
|
---|
7781 | nequi = 100
|
---|
7782 | \end_layout
|
---|
7783 |
|
---|
7784 | \begin_layout Standard
|
---|
7785 |
|
---|
7786 | nsweep = 10000
|
---|
7787 | \end_layout
|
---|
7788 |
|
---|
7789 | \begin_layout Standard
|
---|
7790 |
|
---|
7791 | nmes = 1
|
---|
7792 | \end_layout
|
---|
7793 |
|
---|
7794 | \begin_layout Standard
|
---|
7795 |
|
---|
7796 | newsta = .true.
|
---|
7797 |
|
---|
7798 | \end_layout
|
---|
7799 |
|
---|
7800 | \begin_layout Standard
|
---|
7801 |
|
---|
7802 | switch = 1
|
---|
7803 | \end_layout
|
---|
7804 |
|
---|
7805 | \begin_layout Standard
|
---|
7806 |
|
---|
7807 |
|
---|
7808 | \backslash
|
---|
7809 | end{verbatim}
|
---|
7810 | \end_layout
|
---|
7811 |
|
---|
7812 | \end_inset
|
---|
7813 |
|
---|
7814 | and we call the simulation with
|
---|
7815 | \begin_inset listings
|
---|
7816 | lstparams "breaklines=true,float=h,language=Fortran,showstringspaces=false"
|
---|
7817 | inline false
|
---|
7818 | status collapsed
|
---|
7819 |
|
---|
7820 | \begin_layout Standard
|
---|
7821 |
|
---|
7822 | call partem_s(num_rep, nequi, nsweep, nmes, nmes, newsta, switch)
|
---|
7823 | \end_layout
|
---|
7824 |
|
---|
7825 | \end_inset
|
---|
7826 |
|
---|
7827 | The data is written into file
|
---|
7828 | \emph on
|
---|
7829 | time.d
|
---|
7830 | \emph default
|
---|
7831 | .
|
---|
7832 | The final configurations are stored in
|
---|
7833 | \emph on
|
---|
7834 | conf_000?.var
|
---|
7835 | \emph default
|
---|
7836 | , where the question mark is replaced by the replica ID.
|
---|
7837 | \end_layout
|
---|
7838 |
|
---|
7839 | \begin_layout Standard
|
---|
7840 | \begin_inset LatexCommand bibtex
|
---|
7841 | options "unsrt"
|
---|
7842 | bibfiles "/home/meinke/research/writeups/bibliography"
|
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7843 |
|
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7844 | \end_inset
|
---|
7845 |
|
---|
7846 |
|
---|
7847 | \end_layout
|
---|
7848 |
|
---|
7849 | \begin_layout Standard
|
---|
7850 | \begin_inset LatexCommand printindex
|
---|
7851 |
|
---|
7852 | \end_inset
|
---|
7853 |
|
---|
7854 |
|
---|
7855 | \end_layout
|
---|
7856 |
|
---|
7857 | \end_body
|
---|
7858 | \end_document
|
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