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  • dbrami
    Member
    • Sep 2008
    • 14

    #1

    Scaffolder help

    Hi folks,

    I am trying to scaffold some sequences I have in a 'contigs.fasta' file.
    The contigs range in size from 1k to 37k.
    I have tried using the scaffolding portion of the SOAPdeNovo; it can't seem to map any of my reads back to my assembly, so this doesn't work.

    I have tried using BAMBUS2 but it is telling me "No library account found in bank XYZ". I would have loved to use its option of using a closely related sequence for scaffolding...

    Finally, I have tried SSPACE. It mapped a very small portion of reads and extended another few contigs, but there has been no real progress made with this one, but at least it completed.

    Oddly enough, a BWA mapping of my reads to contigs shows a beautiful and deep coverage almost everywhere. Ideally, I would have substituted the Bowtie alignments from SSPACE for my SAM/BAM file but I don't have access to the premium version of SSPACE.

    Does anyone have any suggestions?
  • boetsie
    Senior Member
    • Feb 2010
    • 245

    #2
    Hi dbrami,

    what is the type of the sequences you have? Paired-end? And what size?

    Did you try to map the sequences yourself using Bowtie?

    Regards,
    Boetsie

    Originally posted by dbrami View Post
    Hi folks,

    I am trying to scaffold some sequences I have in a 'contigs.fasta' file.
    The contigs range in size from 1k to 37k.
    I have tried using the scaffolding portion of the SOAPdeNovo; it can't seem to map any of my reads back to my assembly, so this doesn't work.

    I have tried using BAMBUS2 but it is telling me "No library account found in bank XYZ". I would have loved to use its option of using a closely related sequence for scaffolding...

    Finally, I have tried SSPACE. It mapped a very small portion of reads and extended another few contigs, but there has been no real progress made with this one, but at least it completed.

    Oddly enough, a BWA mapping of my reads to contigs shows a beautiful and deep coverage almost everywhere. Ideally, I would have substituted the Bowtie alignments from SSPACE for my SAM/BAM file but I don't have access to the premium version of SSPACE.

    Does anyone have any suggestions?

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