Find exon-exon spanning reads
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2.5 years ago
Jipjop ▴ 10

I'm trying to find intron-spanning reads (which should be the same as exon-exon spanning reads) to find 'real' coding transcripts. What software/programs can be used to achieve this?

exon • 1.6k views
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one hacky way to do it could be to filter only reads that have a skip e.g. a N in the cigar string...grep on the CIGAR column for N

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Yes I think this is the solution because spliced reads are the same as exon-exon spanning reads! I hadn't thought of that, thanks!

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Are you worried about DNA contamination?

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yes exactly

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2.5 years ago
Trivas ★ 1.8k

There are a ton of threads with the same/similar question. Here's a good place to start but with a bit of googling you can find several more threads.

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@Trivas a trick is to simply paste the link for biostar thread you want to refer to. Biostar expands the title automatically. e.g. How To Extract Spliced Rnaseq Reads

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I want to generate counts for exon-exon spanning reads only and want to use HTSeq count for this if possible. I'm on the Galaxy website and can provide a BAM file of my sample, but as far as I can see, none of the GENCODE GTF files contains information on whether certain reads are exon-exon spanning reads. So how should I do this?

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