1 | /* Change int h to int gh everywhere DES June 1994 */ |
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2 | #include <stdio.h> |
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3 | #include <stdlib.h> |
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4 | #include <string.h> |
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5 | #include <math.h> |
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6 | #include "clustalw.h" |
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7 | |
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8 | #define MIN(a,b) ((a)<(b)?(a):(b)) |
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9 | #define MAX(a,b) ((a)>(b)?(a):(b)) |
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10 | |
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11 | #define gap(k) ((k) <= 0 ? 0 : g + gh * (k)) |
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12 | #define tbgap(k) ((k) <= 0 ? 0 : tb + gh * (k)) |
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13 | #define tegap(k) ((k) <= 0 ? 0 : te + gh * (k)) |
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14 | |
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15 | /* |
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16 | * Prototypes |
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17 | */ |
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18 | static void add(sint v); |
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19 | static sint calc_score(sint iat, sint jat, sint v1, sint v2); |
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20 | static float tracepath(sint tsb1,sint tsb2); |
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21 | static void forward_pass(char *ia, char *ib, sint n, sint m); |
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22 | static void reverse_pass(char *ia, char *ib); |
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23 | static sint diff(sint A, sint B, sint M, sint N, sint tb, sint te); |
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24 | static void del(sint k); |
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25 | |
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26 | /* |
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27 | * Global variables |
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28 | */ |
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29 | #ifdef MAC |
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30 | #define pwint short |
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31 | #else |
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32 | #define pwint int |
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33 | #endif |
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34 | static sint int_scale; |
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35 | |
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36 | extern double **tmat; |
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37 | extern float pw_go_penalty; |
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38 | extern float pw_ge_penalty; |
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39 | extern float transition_weight; |
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40 | extern sint nseqs; |
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41 | extern sint max_aa; |
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42 | extern sint gap_pos1,gap_pos2; |
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43 | extern sint max_aln_length; |
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44 | extern sint *seqlen_array; |
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45 | extern sint debug; |
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46 | extern sint mat_avscore; |
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47 | extern short blosum30mt[],pam350mt[],idmat[],pw_usermat[],pw_userdnamat[]; |
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48 | extern short clustalvdnamt[],swgapdnamt[]; |
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49 | extern short gon250mt[]; |
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50 | extern short def_dna_xref[],def_aa_xref[],pw_dna_xref[],pw_aa_xref[]; |
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51 | extern Boolean dnaflag; |
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52 | extern char **seq_array; |
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53 | extern char *amino_acid_codes; |
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54 | extern char pw_mtrxname[]; |
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55 | extern char pw_dnamtrxname[]; |
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56 | |
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57 | static float mm_score; |
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58 | static sint print_ptr,last_print; |
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59 | static sint *displ; |
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60 | static pwint *HH, *DD, *RR, *SS; |
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61 | static sint g, gh; |
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62 | static sint seq1, seq2; |
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63 | static sint matrix[NUMRES][NUMRES]; |
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64 | static pwint maxscore; |
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65 | static sint sb1, sb2, se1, se2; |
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66 | |
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67 | |
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68 | sint pairalign(sint istart, sint iend, sint jstart, sint jend) |
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69 | { |
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70 | short *mat_xref; |
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71 | static sint si, sj, i; |
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72 | static sint n,m,len1,len2; |
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73 | static sint maxres; |
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74 | static short *matptr; |
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75 | static char c; |
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76 | static float gscale,ghscale; |
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77 | |
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78 | displ = (sint *)ckalloc((2*max_aln_length+1) * sizeof(sint)); |
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79 | HH = (pwint *)ckalloc((max_aln_length) * sizeof(pwint)); |
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80 | DD = (pwint *)ckalloc((max_aln_length) * sizeof(pwint)); |
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81 | RR = (pwint *)ckalloc((max_aln_length) * sizeof(pwint)); |
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82 | SS = (pwint *)ckalloc((max_aln_length) * sizeof(pwint)); |
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83 | |
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84 | #ifdef MAC |
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85 | int_scale = 10; |
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86 | #else |
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87 | int_scale = 100; |
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88 | #endif |
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89 | gscale=ghscale=1.0; |
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90 | if (dnaflag) |
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91 | { |
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92 | if (debug>1) fprintf(stdout,"matrix %s\n",pw_dnamtrxname); |
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93 | if (strcmp(pw_dnamtrxname, "iub") == 0) |
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94 | { |
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95 | matptr = swgapdnamt; |
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96 | mat_xref = def_dna_xref; |
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97 | } |
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98 | else if (strcmp(pw_dnamtrxname, "clustalw") == 0) |
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99 | { |
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100 | matptr = clustalvdnamt; |
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101 | mat_xref = def_dna_xref; |
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102 | gscale=0.6667; |
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103 | ghscale=0.751; |
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104 | } |
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105 | else |
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106 | { |
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107 | matptr = pw_userdnamat; |
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108 | mat_xref = pw_dna_xref; |
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109 | } |
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110 | maxres = get_matrix(matptr, mat_xref, matrix, TRUE, int_scale); |
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111 | if (maxres == 0) return((sint)-1); |
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112 | |
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113 | matrix[0][4]=transition_weight*matrix[0][0]; |
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114 | matrix[4][0]=transition_weight*matrix[0][0]; |
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115 | matrix[2][11]=transition_weight*matrix[0][0]; |
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116 | matrix[11][2]=transition_weight*matrix[0][0]; |
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117 | matrix[2][12]=transition_weight*matrix[0][0]; |
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118 | matrix[12][2]=transition_weight*matrix[0][0]; |
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119 | } |
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120 | else |
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121 | { |
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122 | if (debug>1) fprintf(stdout,"matrix %s\n",pw_mtrxname); |
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123 | if (strcmp(pw_mtrxname, "blosum") == 0) |
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124 | { |
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125 | matptr = blosum30mt; |
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126 | mat_xref = def_aa_xref; |
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127 | } |
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128 | else if (strcmp(pw_mtrxname, "pam") == 0) |
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129 | { |
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130 | matptr = pam350mt; |
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131 | mat_xref = def_aa_xref; |
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132 | } |
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133 | else if (strcmp(pw_mtrxname, "gonnet") == 0) |
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134 | { |
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135 | matptr = gon250mt; |
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136 | int_scale /= 10; |
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137 | mat_xref = def_aa_xref; |
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138 | } |
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139 | else if (strcmp(pw_mtrxname, "id") == 0) |
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140 | { |
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141 | matptr = idmat; |
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142 | mat_xref = def_aa_xref; |
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143 | } |
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144 | else |
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145 | { |
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146 | matptr = pw_usermat; |
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147 | mat_xref = pw_aa_xref; |
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148 | } |
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149 | |
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150 | maxres = get_matrix(matptr, mat_xref, matrix, TRUE, int_scale); |
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151 | if (maxres == 0) return((sint)-1); |
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152 | } |
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153 | |
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154 | |
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155 | for (si=MAX(0,istart);si<nseqs && si<iend;si++) |
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156 | { |
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157 | n = seqlen_array[si+1]; |
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158 | len1 = 0; |
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159 | for (i=1;i<=n;i++) { |
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160 | c = seq_array[si+1][i]; |
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161 | if ((c!=gap_pos1) && (c != gap_pos2)) len1++; |
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162 | } |
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163 | |
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164 | for (sj=MAX(si+1,jstart+1);sj<nseqs && sj<jend;sj++) |
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165 | { |
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166 | m = seqlen_array[sj+1]; |
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167 | len2 = 0; |
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168 | for (i=1;i<=m;i++) { |
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169 | c = seq_array[sj+1][i]; |
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170 | if ((c!=gap_pos1) && (c != gap_pos2)) len2++; |
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171 | } |
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172 | |
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173 | if (dnaflag) { |
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174 | g = 200 * (float)pw_go_penalty*gscale; |
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175 | gh = pw_ge_penalty * int_scale*ghscale; |
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176 | } |
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177 | else { |
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178 | if (mat_avscore <= 0) |
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179 | g = 200 * (float)(pw_go_penalty + log((double)(MIN(n,m)))); |
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180 | else |
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181 | g = 2 * mat_avscore * (float)(pw_go_penalty + |
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182 | log((double)(MIN(n,m)))); |
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183 | gh = pw_ge_penalty * int_scale; |
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184 | } |
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185 | |
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186 | if (debug>1) fprintf(stdout,"go %d ge %d\n",(pint)g,(pint)gh); |
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187 | |
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188 | /* |
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189 | align the sequences |
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190 | */ |
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191 | seq1 = si+1; |
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192 | seq2 = sj+1; |
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193 | |
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194 | forward_pass(&seq_array[seq1][0], &seq_array[seq2][0], |
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195 | n, m); |
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196 | |
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197 | reverse_pass(&seq_array[seq1][0], &seq_array[seq2][0]); |
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198 | |
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199 | last_print = 0; |
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200 | print_ptr = 1; |
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201 | /* |
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202 | sb1 = sb2 = 1; |
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203 | se1 = n-1; |
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204 | se2 = m-1; |
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205 | */ |
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206 | |
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207 | /* use Myers and Miller to align two sequences */ |
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208 | |
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209 | maxscore = diff(sb1-1, sb2-1, se1-sb1+1, se2-sb2+1, |
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210 | (sint)0, (sint)0); |
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211 | |
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212 | /* calculate percentage residue identity */ |
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213 | |
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214 | mm_score = tracepath(sb1,sb2); |
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215 | |
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216 | if(len1==0 || len2==0) mm_score=0; |
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217 | else |
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218 | mm_score /= (float)MIN(len1,len2); |
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219 | |
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220 | tmat[si+1][sj+1] = ((float)100.0 - mm_score)/(float)100.0; |
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221 | tmat[sj+1][si+1] = ((float)100.0 - mm_score)/(float)100.0; |
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222 | |
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223 | if (debug>1) |
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224 | { |
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225 | fprintf(stdout,"Sequences (%d:%d) Aligned. Score: %d CompScore: %d\n", |
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226 | (pint)si+1,(pint)sj+1, |
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227 | (pint)mm_score, |
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228 | (pint)maxscore/(MIN(len1,len2)*100)); |
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229 | } |
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230 | else |
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231 | { |
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232 | info("Sequences (%d:%d) Aligned. Score: %d", |
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233 | (pint)si+1,(pint)sj+1, |
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234 | (pint)mm_score); |
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235 | } |
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236 | |
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237 | } |
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238 | } |
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239 | displ=ckfree((void *)displ); |
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240 | HH=ckfree((void *)HH); |
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241 | DD=ckfree((void *)DD); |
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242 | RR=ckfree((void *)RR); |
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243 | SS=ckfree((void *)SS); |
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244 | |
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245 | |
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246 | return((sint)1); |
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247 | } |
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248 | |
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249 | static void add(sint v) |
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250 | { |
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251 | |
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252 | if(last_print<0) { |
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253 | displ[print_ptr-1] = v; |
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254 | displ[print_ptr++] = last_print; |
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255 | } |
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256 | else |
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257 | last_print = displ[print_ptr++] = v; |
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258 | } |
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259 | |
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260 | static sint calc_score(sint iat,sint jat,sint v1,sint v2) |
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261 | { |
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262 | sint ipos,jpos; |
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263 | sint ret; |
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264 | |
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265 | ipos = v1 + iat; |
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266 | jpos = v2 + jat; |
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267 | |
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268 | ret=matrix[(int)seq_array[seq1][ipos]][(int)seq_array[seq2][jpos]]; |
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269 | |
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270 | return(ret); |
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271 | } |
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272 | |
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273 | |
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274 | static float tracepath(sint tsb1,sint tsb2) |
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275 | { |
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276 | char c1,c2; |
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277 | sint i1,i2; |
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278 | sint i,k,pos,to_do; |
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279 | sint count; |
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280 | float score; |
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281 | /* char *s1, *s2; |
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282 | */ |
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283 | to_do=print_ptr-1; |
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284 | i1 = tsb1; |
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285 | i2 = tsb2; |
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286 | |
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287 | pos = 0; |
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288 | count = 0; |
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289 | for(i=1;i<=to_do;++i) { |
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290 | |
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291 | if (debug>1) fprintf(stdout,"%d ",(pint)displ[i]); |
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292 | if(displ[i]==0) { |
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293 | c1 = seq_array[seq1][i1]; |
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294 | c2 = seq_array[seq2][i2]; |
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295 | /* |
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296 | if (debug>1) |
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297 | { |
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298 | if (c1>max_aa) s1[pos] = '-'; |
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299 | else s1[pos]=amino_acid_codes[c1]; |
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300 | if (c2>max_aa) s2[pos] = '-'; |
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301 | else s2[pos]=amino_acid_codes[c2]; |
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302 | } |
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303 | */ |
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304 | if ((c1!=gap_pos1) && (c1 != gap_pos2) && |
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305 | (c1 == c2)) count++; |
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306 | ++i1; |
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307 | ++i2; |
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308 | ++pos; |
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309 | } |
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310 | else { |
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311 | if((k=displ[i])>0) { |
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312 | /* |
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313 | if (debug>1) |
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314 | for (r=0;r<k;r++) |
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315 | { |
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316 | s1[pos+r]='-'; |
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317 | if (seq_array[seq2][i2+r]>max_aa) s2[pos+r] = '-'; |
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318 | else s2[pos+r]=amino_acid_codes[seq_array[seq2][i2+r]]; |
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319 | } |
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320 | */ |
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321 | i2 += k; |
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322 | pos += k; |
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323 | count--; |
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324 | } |
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325 | else { |
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326 | /* |
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327 | if (debug>1) |
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328 | for (r=0;r<(-k);r++) |
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329 | { |
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330 | s2[pos+r]='-'; |
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331 | if (seq_array[seq1][i1+r]>max_aa) s1[pos+r] = '-'; |
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332 | else s1[pos+r]=amino_acid_codes[seq_array[seq1][i1+r]]; |
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333 | } |
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334 | */ |
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335 | i1 -= k; |
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336 | pos -= k; |
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337 | count--; |
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338 | } |
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339 | } |
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340 | } |
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341 | /* |
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342 | if (debug>1) fprintf(stdout,"\n"); |
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343 | if (debug>1) |
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344 | { |
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345 | for (i=0;i<pos;i++) fprintf(stdout,"%c",s1[i]); |
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346 | fprintf(stdout,"\n"); |
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347 | for (i=0;i<pos;i++) fprintf(stdout,"%c",s2[i]); |
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348 | fprintf(stdout,"\n"); |
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349 | } |
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350 | */ |
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351 | if (count <= 0) count = 1; |
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352 | score = 100.0 * (float)count; |
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353 | return(score); |
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354 | } |
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355 | |
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356 | |
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357 | static void forward_pass(char *ia, char *ib, sint n, sint m) |
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358 | { |
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359 | |
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360 | sint i,j; |
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361 | pwint f,hh,p,t; |
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362 | |
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363 | maxscore = 0; |
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364 | se1 = se2 = 0; |
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365 | for (i=0;i<=m;i++) |
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366 | { |
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367 | HH[i] = 0; |
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368 | DD[i] = -g; |
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369 | } |
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370 | |
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371 | for (i=1;i<=n;i++) |
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372 | { |
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373 | hh = p = 0; |
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374 | f = -g; |
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375 | |
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376 | for (j=1;j<=m;j++) |
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377 | { |
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378 | |
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379 | f -= gh; |
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380 | t = hh - g - gh; |
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381 | if (f<t) f = t; |
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382 | |
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383 | DD[j] -= gh; |
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384 | t = HH[j] - g - gh; |
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385 | if (DD[j]<t) DD[j] = t; |
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386 | |
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387 | hh = p + matrix[(int)ia[i]][(int)ib[j]]; |
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388 | if (hh<f) hh = f; |
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389 | if (hh<DD[j]) hh = DD[j]; |
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390 | if (hh<0) hh = 0; |
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391 | |
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392 | p = HH[j]; |
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393 | HH[j] = hh; |
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394 | |
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395 | if (hh > maxscore) |
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396 | { |
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397 | maxscore = hh; |
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398 | se1 = i; |
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399 | se2 = j; |
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400 | } |
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401 | } |
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402 | } |
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403 | |
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404 | } |
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405 | |
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406 | |
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407 | static void reverse_pass(char *ia, char *ib) |
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408 | { |
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409 | |
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410 | sint i,j; |
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411 | pwint f,hh,p,t; |
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412 | pwint cost; |
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413 | |
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414 | cost = 0; |
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415 | sb1 = sb2 = 0; |
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416 | for (i=se2;i>0;i--) |
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417 | { |
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418 | HH[i] = -1; |
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419 | DD[i] = -1; |
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420 | } |
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421 | |
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422 | for (i=se1;i>0;i--) |
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423 | { |
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424 | hh = f = -1; |
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425 | if (i == se1) p = 0; |
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426 | else p = -1; |
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427 | |
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428 | for (j=se2;j>0;j--) |
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429 | { |
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430 | |
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431 | f -= gh; |
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432 | t = hh - g - gh; |
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433 | if (f<t) f = t; |
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434 | |
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435 | DD[j] -= gh; |
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436 | t = HH[j] - g - gh; |
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437 | if (DD[j]<t) DD[j] = t; |
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438 | |
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439 | hh = p + matrix[(int)ia[i]][(int)ib[j]]; |
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440 | if (hh<f) hh = f; |
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441 | if (hh<DD[j]) hh = DD[j]; |
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442 | |
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443 | p = HH[j]; |
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444 | HH[j] = hh; |
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445 | |
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446 | if (hh > cost) |
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447 | { |
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448 | cost = hh; |
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449 | sb1 = i; |
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450 | sb2 = j; |
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451 | if (cost >= maxscore) break; |
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452 | } |
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453 | } |
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454 | if (cost >= maxscore) break; |
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455 | } |
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456 | |
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457 | } |
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458 | |
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459 | static int diff(sint A,sint B,sint M,sint N,sint tb,sint te) |
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460 | { |
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461 | sint type; |
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462 | sint midi,midj,i,j; |
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463 | int midh; |
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464 | static pwint f, hh, e, s, t; |
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465 | |
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466 | if(N<=0) { |
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467 | if(M>0) { |
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468 | del(M); |
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469 | } |
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470 | |
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471 | return(-(int)tbgap(M)); |
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472 | } |
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473 | |
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474 | if(M<=1) { |
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475 | if(M<=0) { |
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476 | add(N); |
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477 | return(-(int)tbgap(N)); |
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478 | } |
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479 | |
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480 | midh = -(tb+gh) - tegap(N); |
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481 | hh = -(te+gh) - tbgap(N); |
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482 | if (hh>midh) midh = hh; |
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483 | midj = 0; |
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484 | for(j=1;j<=N;j++) { |
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485 | hh = calc_score(1,j,A,B) |
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486 | - tegap(N-j) - tbgap(j-1); |
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487 | if(hh>midh) { |
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488 | midh = hh; |
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489 | midj = j; |
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490 | } |
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491 | } |
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492 | |
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493 | if(midj==0) { |
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494 | del(1); |
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495 | add(N); |
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496 | } |
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497 | else { |
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498 | if(midj>1) |
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499 | add(midj-1); |
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500 | displ[print_ptr++] = last_print = 0; |
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501 | if(midj<N) |
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502 | add(N-midj); |
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503 | } |
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504 | return midh; |
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505 | } |
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506 | |
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507 | /* Divide: Find optimum midpoint (midi,midj) of cost midh */ |
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508 | |
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509 | midi = M / 2; |
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510 | HH[0] = 0.0; |
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511 | t = -tb; |
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512 | for(j=1;j<=N;j++) { |
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513 | HH[j] = t = t-gh; |
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514 | DD[j] = t-g; |
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515 | } |
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516 | |
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517 | t = -tb; |
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518 | for(i=1;i<=midi;i++) { |
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519 | s=HH[0]; |
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520 | HH[0] = hh = t = t-gh; |
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521 | f = t-g; |
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522 | for(j=1;j<=N;j++) { |
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523 | if ((hh=hh-g-gh) > (f=f-gh)) f=hh; |
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524 | if ((hh=HH[j]-g-gh) > (e=DD[j]-gh)) e=hh; |
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525 | hh = s + calc_score(i,j,A,B); |
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526 | if (f>hh) hh = f; |
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527 | if (e>hh) hh = e; |
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528 | |
---|
529 | s = HH[j]; |
---|
530 | HH[j] = hh; |
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531 | DD[j] = e; |
---|
532 | } |
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533 | } |
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534 | |
---|
535 | DD[0]=HH[0]; |
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536 | |
---|
537 | RR[N]=0; |
---|
538 | t = -te; |
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539 | for(j=N-1;j>=0;j--) { |
---|
540 | RR[j] = t = t-gh; |
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541 | SS[j] = t-g; |
---|
542 | } |
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543 | |
---|
544 | t = -te; |
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545 | for(i=M-1;i>=midi;i--) { |
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546 | s = RR[N]; |
---|
547 | RR[N] = hh = t = t-gh; |
---|
548 | f = t-g; |
---|
549 | |
---|
550 | for(j=N-1;j>=0;j--) { |
---|
551 | |
---|
552 | if ((hh=hh-g-gh) > (f=f-gh)) f=hh; |
---|
553 | if ((hh=RR[j]-g-gh) > (e=SS[j]-gh)) e=hh; |
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554 | hh = s + calc_score(i+1,j+1,A,B); |
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555 | if (f>hh) hh = f; |
---|
556 | if (e>hh) hh = e; |
---|
557 | |
---|
558 | s = RR[j]; |
---|
559 | RR[j] = hh; |
---|
560 | SS[j] = e; |
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561 | |
---|
562 | } |
---|
563 | } |
---|
564 | |
---|
565 | SS[N]=RR[N]; |
---|
566 | |
---|
567 | midh=HH[0]+RR[0]; |
---|
568 | midj=0; |
---|
569 | type=1; |
---|
570 | for(j=0;j<=N;j++) { |
---|
571 | hh = HH[j] + RR[j]; |
---|
572 | if(hh>=midh) |
---|
573 | if(hh>midh || (HH[j]!=DD[j] && RR[j]==SS[j])) { |
---|
574 | midh=hh; |
---|
575 | midj=j; |
---|
576 | } |
---|
577 | } |
---|
578 | |
---|
579 | for(j=N;j>=0;j--) { |
---|
580 | hh = DD[j] + SS[j] + g; |
---|
581 | if(hh>midh) { |
---|
582 | midh=hh; |
---|
583 | midj=j; |
---|
584 | type=2; |
---|
585 | } |
---|
586 | } |
---|
587 | |
---|
588 | /* Conquer recursively around midpoint */ |
---|
589 | |
---|
590 | |
---|
591 | if(type==1) { /* Type 1 gaps */ |
---|
592 | diff(A,B,midi,midj,tb,g); |
---|
593 | diff(A+midi,B+midj,M-midi,N-midj,g,te); |
---|
594 | } |
---|
595 | else { |
---|
596 | diff(A,B,midi-1,midj,tb,0.0); |
---|
597 | del(2); |
---|
598 | diff(A+midi+1,B+midj,M-midi-1,N-midj,0.0,te); |
---|
599 | } |
---|
600 | |
---|
601 | return midh; /* Return the score of the best alignment */ |
---|
602 | } |
---|
603 | |
---|
604 | static void del(sint k) |
---|
605 | { |
---|
606 | if(last_print<0) |
---|
607 | last_print = displ[print_ptr-1] -= k; |
---|
608 | else |
---|
609 | last_print = displ[print_ptr++] = -(k); |
---|
610 | } |
---|
611 | |
---|
612 | |
---|