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  • SeqTrbl
    Junior Member
    • Sep 2013
    • 6

    #1

    Rewriting the header of fastq

    Hi all,
    I need help in re-writting the header of my miseq fastq file. can anyone help please?

    Read1:
    @130110_A5T23:1:1101:15646:1320:1#0/1
    NAGTAAGATACAGTCTATCGGGTTTAAGTTATACAACATAGTACAGTACATTCATACCTACCTCTGCAATTAAATTTGGCGGTGTCATAATGTCTTTCAGCACAACTAAAAGAAAAGTTTAAAAGTGATATAAAGTTATCTTTTGCACTT
    +
    #>>AABFFFFFFGGGGGGGGGGCFGHHHHHHHHHHHHHHHHGFHHHHHHHHGHGHHHHHHGHHGHHHGHHHHHHHHHEHGGGEEFGHHHHFHHHGHHHHFHHHHGGGHHHHGGHHGHHHHHHHGHBGHHHHHHHHHFHFHHHHHGHFHHH
    @130110_A5T23:1:1101:17282:1320:0#0/1
    NGGGAGGATGGCTTGAGCCTAGAGGGTTGAGGCTGCAGTGAGCTGTGAGCATGCCATTGCACTCCAGCCTGGGCAACAGAGTGAGGCTCTGTCTCAAAAAAAAAAAAAAAAAAAAAAGAAATAAAATATAAGGGACATAAAATAAAGCAA
    +
    #>>AAA1A1B>F1A1FAFGCG0GBFEAAEHGBFCFFHHA1FEGGFFGGFFHHHGHHHHGHHHHHHHHHGHGGGHHGHHHFHGHGFGGHHHHHHHHHFGHHGGGEGGGGGGGGGGGCC.<<G0DGGFC:CCC0CC.::00:<00:9C####
    Index
    @130110_A5T23:1:1101:15646:1320:1#0/2
    NTTGTATC
    +
    #>>AAAFF
    @130110_A5T23:1:1101:17282:1320:0#0/2
    NTTAGTCT
    +
    #1>>AAFF
    Now Read1 need to be re-written as


    @130110_A5T23:1:1101:15646:1320 1:0:1:NTTGTATC
    NAGTAAGATACAGTCTATCGGGTTTAAGTTATACAACATAGTACAGTACATTCATACCTACCTCTGCAATTAAATTTGGCGGTGTCATAATGTCTTTCAGCACAACTAAAAGAAAAGTTTAAAAGTGATATAAAGTTATCTTTTGCACTT
    +
    #>>AABFFFFFFGGGGGGGGGGCFGHHHHHHHHHHHHHHHHGFHHHHHHHHGHGHHHHHHGHHGHHHGHHHHHHHHHEHGGGEEFGHHHHFHHHGHHHHFHHHHGGGHHHHGGHHGHHHHHHHGHBGHHHHHHHHHFHFHHHHHGHFHHH
    @130110_A5T23:1:1101:17282:1320 0:0:1:NTTAGTCT
    NGGGAGGATGGCTTGAGCCTAGAGGGTTGAGGCTGCAGTGAGCTGTGAGCATGCCATTGCACTCCAGCCTGGGCAACAGAGTGAGGCTCTGTCTCAAAAAAAAAAAAAAAAAAAAAAGAAATAAAATATAAGGGACATAAAATAAAGCAA
    +
    #>>AAA1A1B>F1A1FAFGCG0GBFEAAEHGBFCFFHHA1FEGGFFGGFFHHHGHHHHGHHHHHHHHHGHGGGHHGHHHFHGHGFGGHHHHHHHHHFGHHGGGEGGGGGGGGGGGCC.<<G0DGGFC:CCC0CC.::00:<00:9C####
    i.e. index corresponding to the same id need to come to the header of the Read1 sequences.

    Can someone help me out with this??

    Thanks and regards
  • Jetse
    Member
    • Nov 2012
    • 38

    #2
    A python script to help?

    Written a small python script which will do it for you, you need python 2.7 or higher to execute.
    Code:
    import sys
    
    def writeNewHeader(head, headIn, out):
        writeSeq = False
        for headLine in headIn:
            if writeSeq == True:
                out.write(head + ":" + headLine)
                return
            if headLine.startswith(head):
                writeSeq = True
                continue
    
    def main(seqFile, headerFile, outFile):
        with open("seq.fastq") as seqIn, open("header.fastq") as headIn,  open("out.fastq", "w") as out:
            for seqLine in seqIn:
                if seqLine.startswith("@"):
                    head = seqLine[:-5]
                    writeNewHeader(head, headIn, out)
                else:
                    out.write(seqLine)
        print "finished!"
        
    if len(sys.argv) != 4:
        print "Usage: python renameFastqHeader <sequene File> <header File> <output File>"
    else: main(sys.argv[0],sys.argv[1],sys.argv[2])
    save code as renameFastqHeader.py, the help will print how to execute it

    It is quick and dirty, so don't try to give different files, won't work, and it is not fully optimized... But hope this is what u need

    Comment

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