Mercurial > repos > yufei-luo > s_mart
annotate smart_toolShed/commons/core/seq/BioseqUtils.py @ 0:e0f8dcca02ed
Uploaded S-MART tool. A toolbox manages RNA-Seq and ChIP-Seq data.
author | yufei-luo |
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date | Thu, 17 Jan 2013 10:52:14 -0500 |
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Uploaded S-MART tool. A toolbox manages RNA-Seq and ChIP-Seq data.
yufei-luo
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1 # Copyright INRA (Institut National de la Recherche Agronomique) |
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2 # http://www.inra.fr |
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3 # http://urgi.versailles.inra.fr |
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4 # |
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5 # This software is governed by the CeCILL license under French law and |
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6 # abiding by the rules of distribution of free software. You can use, |
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7 # modify and/ or redistribute the software under the terms of the CeCILL |
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8 # license as circulated by CEA, CNRS and INRIA at the following URL |
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9 # "http://www.cecill.info". |
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10 # |
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11 # As a counterpart to the access to the source code and rights to copy, |
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12 # modify and redistribute granted by the license, users are provided only |
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13 # with a limited warranty and the software's author, the holder of the |
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14 # economic rights, and the successive licensors have only limited |
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15 # liability. |
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16 # |
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17 # In this respect, the user's attention is drawn to the risks associated |
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18 # with loading, using, modifying and/or developing or reproducing the |
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19 # software by the user in light of its specific status of free software, |
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20 # that may mean that it is complicated to manipulate, and that also |
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21 # therefore means that it is reserved for developers and experienced |
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22 # professionals having in-depth computer knowledge. Users are therefore |
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23 # encouraged to load and test the software's suitability as regards their |
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24 # requirements in conditions enabling the security of their systems and/or |
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25 # data to be ensured and, more generally, to use and operate it in the |
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26 # same conditions as regards security. |
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27 # |
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28 # The fact that you are presently reading this means that you have had |
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29 # knowledge of the CeCILL license and that you accept its terms. |
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30 |
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31 |
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32 import math |
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33 import re |
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34 from commons.core.seq.Bioseq import Bioseq |
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35 |
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36 ## Static methods for sequences manipulation |
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37 # |
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38 class BioseqUtils(object): |
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39 |
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40 ## Translate a nucleotide sequence |
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41 # |
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42 # @param bioSeqInstanceToTranslate a bioseq instance to translate |
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43 # @param phase a integer : 1 (default), 2 or 3 |
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44 # |
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45 def translateSequence(bioSeqInstanceToTranslate, phase=1): |
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46 pep = "" |
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47 #length = math.floor((len(self.sequence)-phase-1)/3)*3 |
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48 length = int( math.floor( ( len(bioSeqInstanceToTranslate.sequence )-( phase-1 ) )/3 )*3 ) |
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49 #We need capital letters ! |
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50 bioSeqInstanceToTranslate.upCase() |
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51 sequence = bioSeqInstanceToTranslate.sequence |
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52 for i in xrange(phase-1,length,3): |
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53 if (sequence[i:i+3] == "TTT" or sequence[i:i+3] == "TTC"): |
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54 pep = pep + "F" |
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55 elif ( sequence[i:i+3] == "TTA" or sequence[i:i+3] == "TTG" ): |
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56 pep = pep + "L" |
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57 elif ( sequence[i:i+2] == "CT" ): |
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58 pep = pep + "L" |
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59 elif ( sequence[i:i+3] == "ATT" or sequence[i:i+3] == "ATC" or sequence[i:i+3] == "ATA" ): |
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60 pep = pep + "I" |
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61 elif ( sequence[i:i+3] == "ATG" ): |
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62 pep = pep + "M" |
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63 elif ( sequence[i:i+2] == "GT" ): |
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64 pep = pep + "V" |
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65 elif ( sequence[i:i+2] == "TC" ) : |
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66 pep = pep + "S" |
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67 elif ( sequence[i:i+2] == "CC" ) : |
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68 pep = pep + "P" |
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69 elif ( sequence[i:i+2] == "AC" ) : |
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70 pep = pep + "T" |
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71 elif ( sequence[i:i+2] == "GC" ) : |
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72 pep = pep + "A" |
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73 elif ( sequence[i:i+3] == "TAT" or sequence[i:i+3] == "TAC" ) : |
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74 pep = pep + "Y" |
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75 elif ( sequence[i:i+3] == "TAA" or sequence[i:i+3] == "TAG" ) : |
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76 pep = pep + "*" |
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77 elif ( sequence[i:i+3] == "CAT" or sequence[i:i+3] == "CAC" ) : |
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78 pep = pep + "H" |
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79 elif ( sequence[i:i+3] == "CAA" or sequence[i:i+3] == "CAG" ) : |
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80 pep = pep + "Q" |
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81 elif ( sequence[i:i+3] == "AAT" or sequence[i:i+3] == "AAC" ) : |
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82 pep = pep + "N" |
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83 elif ( sequence[i:i+3] == "AAA" or sequence[i:i+3] == "AAG" ) : |
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84 pep = pep + "K" |
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85 elif ( sequence[i:i+3] == "GAT" or sequence[i:i+3] == "GAC" ) : |
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86 pep = pep + "D" |
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87 elif ( sequence[i:i+3] == "GAA" or sequence[i:i+3] == "GAG" ) : |
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88 pep = pep + "E" |
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89 elif ( sequence[i:i+3] == "TGT" or sequence[i:i+3] == "TGC" ) : |
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90 pep = pep + "C" |
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91 elif ( sequence[i:i+3] == "TGA" ) : |
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92 pep = pep + "*" |
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93 elif ( sequence[i:i+3] == "TGG" ) : |
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94 pep = pep + "W" |
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95 elif ( sequence[i:i+2] == "CG" ) : |
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96 pep = pep + "R" |
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97 elif ( sequence[i:i+3] == "AGT" or sequence[i:i+3] == "AGC" ) : |
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98 pep = pep + "S" |
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99 elif ( sequence[i:i+3] == "AGA" or sequence[i:i+3] == "AGG" ) : |
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100 pep = pep + "R" |
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101 elif ( sequence[i:i+2] == "GG" ): |
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102 pep = pep + "G" |
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103 #We don't know the amino acid because we don't have the nucleotide |
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104 #R Purine (A or G) |
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105 #Y Pyrimidine (C, T, or U) |
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106 #M C or A |
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107 #K T, U, or G |
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108 #W T, U, or A |
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109 #S C or G |
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110 #B C, T, U, or G (not A) |
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111 #D A, T, U, or G (not C) |
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112 #H A, T, U, or C (not G) |
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113 #V A, C, or G (not T, not U) |
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114 #N Unknown nucleotide |
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115 elif ( re.search("N|R|Y|M|K|W|S|B|D|H|V", sequence[i:i+3])): |
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116 pep = pep + "X" |
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117 bioSeqInstanceToTranslate.sequence = pep |
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118 |
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119 translateSequence = staticmethod(translateSequence) |
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120 |
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121 ## Add the frame info in header |
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122 # |
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123 # @param bioSeqInstance a bioseq instance to translate |
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124 # @param phase a integer : 1 , 2 or 3 |
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125 # |
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126 def setFrameInfoOnHeader(bioSeqInstance, phase): |
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127 if " " in bioSeqInstance.header: |
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128 name, desc = bioSeqInstance.header.split(" ", 1) |
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129 name = name + "_" + str(phase) |
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130 bioSeqInstance.header = name + " " + desc |
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131 else: |
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132 bioSeqInstance.header = bioSeqInstance.header + "_" + str(phase) |
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133 |
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134 setFrameInfoOnHeader = staticmethod(setFrameInfoOnHeader) |
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135 |
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136 ## Translate a nucleotide sequence for all frames (positives and negatives) |
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137 # |
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138 # @param bioSeqInstanceToTranslate a bioseq instance to translate |
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139 # |
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140 def translateInAllFrame( bioSeqInstanceToTranslate ): |
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141 positives = BioseqUtils._translateInPositiveFrames( bioSeqInstanceToTranslate ) |
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142 negatives = BioseqUtils._translateInNegativeFrames( bioSeqInstanceToTranslate ) |
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143 listAll6Frames = [] |
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144 listAll6Frames.extend(positives) |
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145 listAll6Frames.extend(negatives) |
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146 return listAll6Frames |
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147 |
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148 translateInAllFrame = staticmethod(translateInAllFrame) |
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149 |
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150 ## Replace the stop codons by X in sequence |
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151 # |
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152 # @param bioSeqInstance a bioseq instance |
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153 # |
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154 def replaceStopCodonsByX( bioSeqInstance ): |
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155 bioSeqInstance.sequence = bioSeqInstance.sequence.replace ("*", "X") |
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156 |
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157 replaceStopCodonsByX = staticmethod(replaceStopCodonsByX) |
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158 |
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159 ## Translate in a list all the frames of all the bioseq of bioseq list |
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160 # |
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161 # @param bioseqList a list of bioseq instances |
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162 # @return a list of translated bioseq instances |
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163 # |
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164 def translateBioseqListInAllFrames( bioseqList ): |
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165 bioseqListInAllFrames = [] |
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166 for bioseq in bioseqList : |
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167 bioseqListInAllFrames.extend(BioseqUtils.translateInAllFrame(bioseq)) |
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168 return bioseqListInAllFrames |
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169 |
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170 translateBioseqListInAllFrames = staticmethod( translateBioseqListInAllFrames ) |
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171 |
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172 ## Replace the stop codons by X for each sequence of a bioseq list |
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173 # |
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174 # @param lBioseqWithStops a list of bioseq instances |
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175 # @return a list of bioseq instances |
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176 # |
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177 def replaceStopCodonsByXInBioseqList ( lBioseqWithStops ): |
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178 bioseqListWithStopsreplaced = [] |
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179 for bioseq in lBioseqWithStops: |
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180 BioseqUtils.replaceStopCodonsByX(bioseq) |
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181 bioseqListWithStopsreplaced.append(bioseq) |
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182 return bioseqListWithStopsreplaced |
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183 |
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184 replaceStopCodonsByXInBioseqList = staticmethod( replaceStopCodonsByXInBioseqList ) |
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185 |
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186 ## Write a list of bioseq instances in a fasta file (60 characters per line) |
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187 # |
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188 # @param lBioseq a list of bioseq instances |
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189 # @param fileName string |
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190 # |
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191 def writeBioseqListIntoFastaFile( lBioseq, fileName ): |
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192 fout = open(fileName, "w") |
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193 for bioseq in lBioseq: |
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194 bioseq.write(fout) |
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195 fout.close() |
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196 |
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197 writeBioseqListIntoFastaFile = staticmethod( writeBioseqListIntoFastaFile ) |
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198 |
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199 ## read in a fasta file and create a list of bioseq instances |
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200 # |
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201 # @param fileName string |
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202 # @return a list of bioseq |
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203 # |
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204 def extractBioseqListFromFastaFile( fileName ): |
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205 file = open( fileName ) |
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206 lBioseq = [] |
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207 currentHeader = "" |
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208 while currentHeader != None: |
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209 bioseq = Bioseq() |
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210 bioseq.read(file) |
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211 currentHeader = bioseq.header |
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212 if currentHeader != None: |
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213 lBioseq.append(bioseq) |
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214 return lBioseq |
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215 |
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216 extractBioseqListFromFastaFile = staticmethod( extractBioseqListFromFastaFile ) |
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217 |
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218 ## Give the length of a sequence search by name |
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219 # |
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220 # @param lBioseq a list of bioseq instances |
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221 # @param seqName string |
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222 # @return an integer |
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223 # |
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224 def getSeqLengthWithSeqName( lBioseq, seqName ): |
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225 length = 0 |
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226 for bioseq in lBioseq: |
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227 if bioseq.header == seqName: |
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228 length = bioseq.getLength() |
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229 break |
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230 return length |
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231 |
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232 getSeqLengthWithSeqName = staticmethod( getSeqLengthWithSeqName ) |
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233 |
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234 def _translateInPositiveFrames( bioSeqInstanceToTranslate ): |
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235 seq1 = bioSeqInstanceToTranslate.copyBioseqInstance() |
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236 BioseqUtils.setFrameInfoOnHeader(seq1, 1) |
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237 BioseqUtils.translateSequence(seq1, 1) |
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238 seq2 = bioSeqInstanceToTranslate.copyBioseqInstance() |
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239 BioseqUtils.setFrameInfoOnHeader(seq2, 2) |
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240 BioseqUtils.translateSequence(seq2, 2) |
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241 seq3 = bioSeqInstanceToTranslate.copyBioseqInstance() |
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242 BioseqUtils.setFrameInfoOnHeader(seq3, 3) |
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243 BioseqUtils.translateSequence(seq3, 3) |
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244 return [seq1, seq2, seq3] |
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245 |
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246 _translateInPositiveFrames = staticmethod( _translateInPositiveFrames ) |
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247 |
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248 def _translateInNegativeFrames(bioSeqInstanceToTranslate): |
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249 seq4 = bioSeqInstanceToTranslate.copyBioseqInstance() |
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250 seq4.reverseComplement() |
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251 BioseqUtils.setFrameInfoOnHeader(seq4, 4) |
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252 BioseqUtils.translateSequence(seq4, 1) |
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253 seq5 = bioSeqInstanceToTranslate.copyBioseqInstance() |
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254 seq5.reverseComplement() |
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255 BioseqUtils.setFrameInfoOnHeader(seq5, 5) |
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256 BioseqUtils.translateSequence(seq5, 2) |
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257 seq6 = bioSeqInstanceToTranslate.copyBioseqInstance() |
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258 seq6.reverseComplement() |
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259 BioseqUtils.setFrameInfoOnHeader(seq6, 6) |
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260 BioseqUtils.translateSequence(seq6, 3) |
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261 return [seq4, seq5, seq6] |
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262 |
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263 _translateInNegativeFrames = staticmethod( _translateInNegativeFrames ) |
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264 |
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265 |
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266 ## Return a dictionary which keys are sequence headers and values sequence lengths. |
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267 # |
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268 def getLengthPerSeqFromFile( inFile ): |
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269 dHeader2Length = {} |
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270 inFileHandler = open( inFile, "r" ) |
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271 while True: |
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272 iBs = Bioseq() |
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273 iBs.read( inFileHandler ) |
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274 if iBs.sequence == None: |
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275 break |
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276 dHeader2Length[ iBs.header ] = iBs.getLength() |
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277 inFileHandler.close() |
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278 return dHeader2Length |
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279 |
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280 getLengthPerSeqFromFile = staticmethod( getLengthPerSeqFromFile ) |
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281 |
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282 |
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283 ## Return the list of Bioseq instances, these being sorted in decreasing length |
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284 # |
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285 def getBioseqListSortedByDecreasingLength( lBioseqs ): |
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286 return sorted( lBioseqs, key=lambda iBs: ( iBs.getLength() ), reverse=True ) |
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287 |
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288 getBioseqListSortedByDecreasingLength = staticmethod( getBioseqListSortedByDecreasingLength ) |
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289 |
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290 |
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291 ## Return the list of Bioseq instances, these being sorted in decreasing length (without gaps) |
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292 # |
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293 def getBioseqListSortedByDecreasingLengthWithoutGaps( lBioseqs ): |
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294 return sorted( lBioseqs, key=lambda iBs: ( len(iBs.sequence.replace("-","")) ), reverse=True ) |
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295 |
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296 getBioseqListSortedByDecreasingLengthWithoutGaps = staticmethod( getBioseqListSortedByDecreasingLengthWithoutGaps ) |