Question: counting after aligning miRNA reads to miRBase mature miRNA instead of reference genome
gravatar for inah
2.5 years ago by
inah20 wrote:

I have human miRNA-seq data. In the past I have aligned these data using Bowtie2 to the reference genome (Homo_sapiens.GRCh38.dna.toplevel.fa), and I have subsequently performed counting using featureCounts with the annotation file hsa.gff3 from miRBase. . Now I have aligned the reads to the mature miRNA from miRBase (mature.fa), but when I look at the resulting bam files, the reads have a flag of 4 (segment unmapped) and there is no position information in mature.fa.

So can I use mature.fa as the reference for alignment and if so how is counting performed?

Thanks, Ina

mirna-seq • 1.3k views
ADD COMMENTlink modified 2.3 years ago by toralmanvar900 • written 2.5 years ago by inah20
gravatar for toralmanvar
2.3 years ago by
toralmanvar900 wrote:

yes, you can map the reads to mature miRNAs and can count the reads mapping onto it using samtools idxstat. Alternatively use can try using tool like mirdeep2 for complete analysis of miRNAs.

ADD COMMENTlink written 2.3 years ago by toralmanvar900
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