I have a DNA seq data set from mouse genome that is heterozygous for a known 15 bp deletion. The deletion is listed in the SAM tools pileup: mapping quality = 690, SNP quality =690, mapping quality =52, coverage = 62, 11 reads span the deletion, 52 reads are reference. When I use SAM tools ‘filter pileup on coverage and SNPs’, this deletion is filtered out. I’m using the default settings for the filter: coverage=3, quality cap=60 (is this the Phred quality score or is it the Phred quality coefficient?). Does anyone whether this deletion is filtered out simply because it’s a deletion or is it filtered out due to the mapping quality? Can anyone suggest an alternative tool / setting for filtering the pileup?
Thanks, Laura Laura Reinholdt, PhD Research Scientist Genetic Resource Sciences The Jackson Laboratory 600 Main Street Bar Harbor, ME 04609-1500 (207) 288-6000, ext. 6693
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