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1 #!/usr/bin/env python
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2 #Guruprasad Ananda
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3 """
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4 Uses SPUTNIK to fetch microsatellites and extracts orthologous repeats from the sputnik output.
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5 """
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6 import os
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7 import re
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8 import string
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9 import sys
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10 import tempfile
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11
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12 def reverse_complement(text):
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13 DNA_COMP = string.maketrans( "ACGTacgt", "TGCAtgca" )
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14 comp = [ch for ch in text.translate(DNA_COMP)]
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15 comp.reverse()
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16 return "".join(comp)
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17
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18
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19 def main():
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20 if len(sys.argv) != 8:
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21 print >> sys.stderr, "Insufficient number of arguments."
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22 sys.exit()
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23
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24 infile = open(sys.argv[1],'r')
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25 separation = int(sys.argv[2])
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26 outfile = sys.argv[3]
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27 mono_threshold = int(sys.argv[5])
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28 non_mono_threshold = int(sys.argv[6])
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29 allow_different_units = int(sys.argv[7])
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30
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31 print "Min distance = %d bp; Min threshold for mono repeats = %d; Min threshold for non-mono repeats = %d; Allow different motifs = %s" % ( separation, mono_threshold, non_mono_threshold, allow_different_units==1 )
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32 try:
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33 fout = open(outfile, "w")
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34 print >> fout, "#Block\tSeq1_Name\tSeq1_Start\tSeq1_End\tSeq1_Type\tSeq1_Length\tSeq1_RepeatNumber\tSeq1_Unit\tSeq2_Name\tSeq2_Start\tSeq2_End\tSeq2_Type\tSeq2_Length\tSeq2_RepeatNumber\tSeq2_Unit"
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35 #sputnik_cmd = os.path.join(os.path.split(sys.argv[0])[0], "sputnik")
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36 sputnik_cmd = "sputnik"
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37 input = infile.read()
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38 block_num = 0
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39 input = input.replace('\r','\n')
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40 for block in input.split('\n\n'):
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41 block_num += 1
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42 tmpin = tempfile.NamedTemporaryFile()
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43 tmpout = tempfile.NamedTemporaryFile()
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44 tmpin.write(block.strip())
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45 cmdline = sputnik_cmd + " " + tmpin.name + " > /dev/null 2>&1 >> " + tmpout.name
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46 try:
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47 os.system(cmdline)
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48 except Exception:
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49 continue
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50 sputnik_out = tmpout.read()
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51 tmpin.close()
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52 tmpout.close()
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53 if sputnik_out != "":
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54 if len(block.split('>')[1:]) != 2: #len(sputnik_out.split('>')):
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55 continue
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56 align_block = block.strip().split('>')
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57
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58 lendict = {'mononucleotide':1, 'dinucleotide':2, 'trinucleotide':3, 'tetranucleotide':4, 'pentanucleotide':5, 'hexanucleotide':6}
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59 blockdict = {}
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60 r = 0
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61 namelist = []
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62 for k, sput_block in enumerate(sputnik_out.split('>')[1:]):
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63 whole_seq = ''.join(align_block[k+1].split('\n')[1:]).replace('\n','').strip()
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64 p = re.compile('\n(\S*nucleotide)')
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65 repeats = p.split(sput_block.strip())
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66 repeats_count = len(repeats)
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67 j = 1
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68 name = repeats[0].strip()
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69 try:
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70 coords = re.search('\d+[-_:]\d+', name).group()
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71 coords = coords.replace('_', '-').replace(':', '-')
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72 except Exception:
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73 coords = '0-0'
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74 r += 1
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75 blockdict[r] = {}
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76 try:
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77 sp_name = name[:name.index('.')]
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78 chr_name = name[name.index('.'):name.index('(')]
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79 namelist.append(sp_name + chr_name)
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80 except:
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81 namelist.append(name[:20])
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82 while j < repeats_count:
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83 try:
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84 if repeats[j].strip() not in lendict:
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85 j += 2
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86 continue
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87
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88 if blockdict[r].has_key('types'):
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89 blockdict[r]['types'].append(repeats[j].strip()) #type of microsat
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90 else:
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91 blockdict[r]['types'] = [repeats[j].strip()] #type of microsat
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92
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93 start = int(repeats[j+1].split('--')[0].split(':')[0].strip())
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94 #check to see if there are gaps before the start of the repeat, and change the start accordingly
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95 sgaps = 0
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96 ch_pos = start - 1
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97 while ch_pos >= 0:
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98 if whole_seq[ch_pos] == '-':
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99 sgaps += 1
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100 else:
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101 break #break at the 1st non-gap character
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102 ch_pos -= 1
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103 if blockdict[r].has_key('starts'):
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104 blockdict[r]['starts'].append(start+sgaps) #start co-ords adjusted with alignment co-ords to include GAPS
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105 else:
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106 blockdict[r]['starts'] = [start+sgaps]
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107
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108 end = int(repeats[j+1].split('--')[0].split(':')[1].strip())
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109 #check to see if there are gaps after the end of the repeat, and change the end accordingly
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110 egaps = 0
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111 for ch in whole_seq[end:]:
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112 if ch == '-':
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113 egaps += 1
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114 else:
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115 break #break at the 1st non-gap character
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116 if blockdict[r].has_key('ends'):
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117 blockdict[r]['ends'].append(end+egaps) #end co-ords adjusted with alignment co-ords to include GAPS
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118 else:
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119 blockdict[r]['ends'] = [end+egaps]
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120
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121 repeat_seq = ''.join(repeats[j+1].replace('\r','\n').split('\n')[1:]).strip() #Repeat Sequence
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122 repeat_len = repeats[j+1].split('--')[1].split()[1].strip()
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123 gap_count = repeat_seq.count('-')
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124 #print repeats[j+1].split('--')[1], len(repeat_seq), repeat_len, gap_count
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125 repeat_len = str(int(repeat_len) - gap_count)
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126
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127 rel_start = blockdict[r]['starts'][-1]
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128 gaps_before_start = whole_seq[:rel_start].count('-')
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129
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130 if blockdict[r].has_key('gaps_before_start'):
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131 blockdict[r]['gaps_before_start'].append(gaps_before_start) #lengths
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132 else:
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133 blockdict[r]['gaps_before_start'] = [gaps_before_start] #lengths
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134
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135 whole_seq_start = int(coords.split('-')[0])
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136 if blockdict[r].has_key('whole_seq_start'):
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137 blockdict[r]['whole_seq_start'].append(whole_seq_start) #lengths
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138 else:
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139 blockdict[r]['whole_seq_start'] = [whole_seq_start] #lengths
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140
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141 if blockdict[r].has_key('lengths'):
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142 blockdict[r]['lengths'].append(repeat_len) #lengths
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143 else:
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144 blockdict[r]['lengths'] = [repeat_len] #lengths
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145
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146 if blockdict[r].has_key('counts'):
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147 blockdict[r]['counts'].append(str(int(repeat_len)/lendict[repeats[j].strip()])) #Repeat Unit
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148 else:
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149 blockdict[r]['counts'] = [str(int(repeat_len)/lendict[repeats[j].strip()])] #Repeat Unit
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150
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151 if blockdict[r].has_key('units'):
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152 blockdict[r]['units'].append(repeat_seq[:lendict[repeats[j].strip()]]) #Repeat Unit
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153 else:
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154 blockdict[r]['units'] = [repeat_seq[:lendict[repeats[j].strip()]]] #Repeat Unit
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155
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156 except Exception:
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157 pass
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158 j += 2
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159 #check the co-ords of all repeats corresponding to a sequence and remove adjacent repeats separated by less than the user-specified 'separation'.
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160 delete_index_list = []
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161 for ind, item in enumerate(blockdict[r]['ends']):
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162 try:
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163 if blockdict[r]['starts'][ind+1]-item < separation:
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164 if ind not in delete_index_list:
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165 delete_index_list.append(ind)
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166 if ind+1 not in delete_index_list:
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167 delete_index_list.append(ind+1)
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168 except Exception:
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169 pass
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170 for index in delete_index_list: #mark them for deletion
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171 try:
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172 blockdict[r]['starts'][index] = 'marked'
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173 blockdict[r]['ends'][index] = 'marked'
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174 blockdict[r]['types'][index] = 'marked'
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175 blockdict[r]['gaps_before_start'][index] = 'marked'
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176 blockdict[r]['whole_seq_start'][index] = 'marked'
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177 blockdict[r]['lengths'][index] = 'marked'
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178 blockdict[r]['counts'][index] = 'marked'
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179 blockdict[r]['units'][index] = 'marked'
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180 except Exception:
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181 pass
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182 #remove 'marked' elements from all the lists
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183 """
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184 for key in blockdict[r].keys():
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185 for elem in blockdict[r][key]:
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186 if elem == 'marked':
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187 blockdict[r][key].remove(elem)
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188 """
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189 #print blockdict
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190
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191 #make sure that the blockdict has keys for both the species
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192 if (1 not in blockdict) or (2 not in blockdict):
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193 continue
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194
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195 visited_2 = [0 for x in range(len(blockdict[2]['starts']))]
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196 for ind1, coord_s1 in enumerate(blockdict[1]['starts']):
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197 if coord_s1 == 'marked':
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198 continue
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199 coord_e1 = blockdict[1]['ends'][ind1]
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200 out = []
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201 for ind2, coord_s2 in enumerate(blockdict[2]['starts']):
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202 if coord_s2 == 'marked':
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203 visited_2[ind2] = 1
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204 continue
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205 coord_e2 = blockdict[2]['ends'][ind2]
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206 #skip if the 2 repeats are not of the same type or don't have the same repeating unit.
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207 if allow_different_units == 0:
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208 if (blockdict[1]['types'][ind1] != blockdict[2]['types'][ind2]):
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209 continue
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210 else:
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211 if (blockdict[1]['units'][ind1] not in blockdict[2]['units'][ind2]*2) and (reverse_complement(blockdict[1]['units'][ind1]) not in blockdict[2]['units'][ind2]*2):
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212 continue
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213 #print >> sys.stderr, (reverse_complement(blockdict[1]['units'][ind1]) not in blockdict[2]['units'][ind2]*2)
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214 #skip if the repeat number thresholds are not met
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215 if blockdict[1]['types'][ind1] == 'mononucleotide':
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216 if (int(blockdict[1]['counts'][ind1]) < mono_threshold):
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217 continue
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218 else:
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219 if (int(blockdict[1]['counts'][ind1]) < non_mono_threshold):
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220 continue
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221
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222 if blockdict[2]['types'][ind2] == 'mononucleotide':
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223 if (int(blockdict[2]['counts'][ind2]) < mono_threshold):
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224 continue
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225 else:
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226 if (int(blockdict[2]['counts'][ind2]) < non_mono_threshold):
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227 continue
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228 #print "s1,e1=%s,%s; s2,e2=%s,%s" % ( coord_s1, coord_e1, coord_s2, coord_e2 )
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229 if (coord_s1 in range(coord_s2, coord_e2)) or (coord_e1 in range(coord_s2, coord_e2)):
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230 out.append(str(block_num))
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231 out.append(namelist[0])
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232 rel_start = blockdict[1]['whole_seq_start'][ind1] + coord_s1 - blockdict[1]['gaps_before_start'][ind1]
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233 rel_end = rel_start + int(blockdict[1]['lengths'][ind1])
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234 out.append(str(rel_start))
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235 out.append(str(rel_end))
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236 out.append(blockdict[1]['types'][ind1])
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237 out.append(blockdict[1]['lengths'][ind1])
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238 out.append(blockdict[1]['counts'][ind1])
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239 out.append(blockdict[1]['units'][ind1])
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240 out.append(namelist[1])
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241 rel_start = blockdict[2]['whole_seq_start'][ind2] + coord_s2 - blockdict[2]['gaps_before_start'][ind2]
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242 rel_end = rel_start + int(blockdict[2]['lengths'][ind2])
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243 out.append(str(rel_start))
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244 out.append(str(rel_end))
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245 out.append(blockdict[2]['types'][ind2])
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246 out.append(blockdict[2]['lengths'][ind2])
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247 out.append(blockdict[2]['counts'][ind2])
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248 out.append(blockdict[2]['units'][ind2])
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249 print >> fout, '\t'.join(out)
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250 visited_2[ind2] = 1
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251 out = []
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252
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253 if 0 in visited_2: #there are still some elements in 2nd set which haven't found orthologs yet.
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254 for ind2, coord_s2 in enumerate(blockdict[2]['starts']):
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255 if coord_s2 == 'marked':
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256 continue
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257 if visited_2[ind] != 0:
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258 continue
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259 coord_e2 = blockdict[2]['ends'][ind2]
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260 out = []
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261 for ind1, coord_s1 in enumerate(blockdict[1]['starts']):
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262 if coord_s1 == 'marked':
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263 continue
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264 coord_e1 = blockdict[1]['ends'][ind1]
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265 #skip if the 2 repeats are not of the same type or don't have the same repeating unit.
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266 if allow_different_units == 0:
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267 if (blockdict[1]['types'][ind1] != blockdict[2]['types'][ind2]):
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268 continue
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269 else:
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270 if (blockdict[1]['units'][ind1] not in blockdict[2]['units'][ind2]*2):# and reverse_complement(blockdict[1]['units'][ind1]) not in blockdict[2]['units'][ind2]*2:
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271 continue
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272 #skip if the repeat number thresholds are not met
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273 if blockdict[1]['types'][ind1] == 'mononucleotide':
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274 if (int(blockdict[1]['counts'][ind1]) < mono_threshold):
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275 continue
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276 else:
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277 if (int(blockdict[1]['counts'][ind1]) < non_mono_threshold):
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278 continue
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279
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280 if blockdict[2]['types'][ind2] == 'mononucleotide':
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281 if (int(blockdict[2]['counts'][ind2]) < mono_threshold):
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282 continue
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283 else:
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284 if (int(blockdict[2]['counts'][ind2]) < non_mono_threshold):
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285 continue
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286
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287 if (coord_s2 in range(coord_s1, coord_e1)) or (coord_e2 in range(coord_s1, coord_e1)):
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288 out.append(str(block_num))
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289 out.append(namelist[0])
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290 rel_start = blockdict[1]['whole_seq_start'][ind1] + coord_s1 - blockdict[1]['gaps_before_start'][ind1]
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291 rel_end = rel_start + int(blockdict[1]['lengths'][ind1])
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292 out.append(str(rel_start))
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293 out.append(str(rel_end))
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294 out.append(blockdict[1]['types'][ind1])
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295 out.append(blockdict[1]['lengths'][ind1])
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296 out.append(blockdict[1]['counts'][ind1])
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297 out.append(blockdict[1]['units'][ind1])
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298 out.append(namelist[1])
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299 rel_start = blockdict[2]['whole_seq_start'][ind2] + coord_s2 - blockdict[2]['gaps_before_start'][ind2]
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300 rel_end = rel_start + int(blockdict[2]['lengths'][ind2])
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301 out.append(str(rel_start))
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302 out.append(str(rel_end))
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303 out.append(blockdict[2]['types'][ind2])
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304 out.append(blockdict[2]['lengths'][ind2])
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305 out.append(blockdict[2]['counts'][ind2])
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306 out.append(blockdict[2]['units'][ind2])
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307 print >> fout, '\t'.join(out)
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308 visited_2[ind2] = 1
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309 out = []
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310
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311 #print >> fout, blockdict
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312 except Exception, exc:
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313 print >> sys.stderr, "type(exc),args,exc: %s, %s, %s" % ( type(exc), exc.args, exc )
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314
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315
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316 if __name__ == "__main__":
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317 main()
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