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  • sbdk82
    Member
    • Jul 2014
    • 26

    #1

    Bowtie2 long index(.bt21) and tophat

    I am using tophat2 with long index with suffixes .bt21. But it is giving the following error

    HTML Code:
    Could not find Bowtie 2 index files (.*.bt2)
  • GenoMax
    Senior Member
    • Feb 2008
    • 7142

    #2
    As of TopHat v.2.0.11 64-bit bowtie2 indexes were not supported. A new maintenance release is out (v. 2.0.12) but it is likely that long indexes are still not supported.

    Comment

    • sbdk82
      Member
      • Jul 2014
      • 26

      #3
      Yes, I am using tophat/2.0.12 but still getting that error. Anyway, thanks for your reply.

      Comment

      • pengchy
        Senior Member
        • Feb 2009
        • 116

        #4
        try to change "bt2" into "bt2l" in the tophat source file.

        Comment

        • yifeng
          Junior Member
          • Aug 2015
          • 1

          #5
          Originally posted by pengchy View Post
          try to change "bt2" into "bt2l" in the tophat source file.
          @pengchy: Will this work by changing bt2 to bt2l in source?

          I am using tophat 2.1.0, still have problem of using bt2l. Any solutions so far? I am working on a very genome, so have to use bt2l. Can I align each chromosome separately, and then merge the bam files?

          Comment

          • pengchy
            Senior Member
            • Feb 2009
            • 116

            #6
            Originally posted by yifeng View Post
            @pengchy: Will this work by changing bt2 to bt2l in source?

            I am using tophat 2.1.0, still have problem of using bt2l. Any solutions so far? I am working on a very genome, so have to use bt2l. Can I align each chromosome separately, and then merge the bam files?
            Yes, I have tested this on tophat-2.0.13.Linux_x86_64/tophat successfully.

            Comment

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