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  • How to count the reads mapping to different regions from tophat output

    Hi All.

    I just mapped the RNA-Seqs by Tophat and got the output file accepted_hit.bam. I want to count the reads mapping to different regions such as exon,intron,exon-exon junction,exon-intron junction intergenic,rRNA and so on. I am really new in this field. Is there any software or custom script can do this? If you have a script can do this, would you please share it with me?Thank you very much.

    Any reply will be appreciated.

    Best

  • #2
    Dear all, I also want to know how to count reads mapping to different regions of one gene. Could any one do me the favor? Thanks!

    Comment


    • #3
      The featureCounts function included in the bioconductor package Rsubread can count reads for you - http://bioconductor.org/packages/rel.../Rsubread.html .

      It accepts both SAM and BAM format input files. By default, it assigns reads to NCBI RefSeq exons and/or genes. But you can provide your own annotation.

      Comment


      • #4
        Originally posted by shi View Post
        The featureCounts function included in the bioconductor package Rsubread can count reads for you - http://bioconductor.org/packages/rel.../Rsubread.html .

        It accepts both SAM and BAM format input files. By default, it assigns reads to NCBI RefSeq exons and/or genes. But you can provide your own annotation.
        Hi Shi, Thanks! I'm going to try it.
        Have a nice weekend!

        Comment


        • #5
          Originally posted by shi View Post
          The featureCounts function included in the bioconductor package Rsubread can count reads for you - http://bioconductor.org/packages/rel.../Rsubread.html .

          It accepts both SAM and BAM format input files. By default, it assigns reads to NCBI RefSeq exons and/or genes. But you can provide your own annotation.
          Hi Shi,
          Thank you for your help.

          vivienne

          Comment


          • #6
            Hi Shi,

            how to do the same on linux? I want reads mapped to rRNA regions. how to do that? I have gtf and bam file.

            In featureCounts manual it is given.

            featureCounts -p -t exon -g gene_id -a hg19_RefSeq.gtf -o counts.txt accepted_hits.bam

            This Summarize paired-end reads and count fragments (instead of reads).

            Is this right one to count read pairs mapped to rRNA regions. Could you please help me.

            Thank you
            Last edited by bvk; 04-20-2016, 02:05 AM.

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