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Variant Discovery in High-Throughput Sequencing Data

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Developed in the Data Sciences Platform at the Broad Institute, the toolkit offers a wide variety of tools with a primary focus on variant discovery and genotyping. Its powerful processing engine and high-performance computing features make it capable of taking on projects of any size. Learn more

How to process GVCFs from partially masked genomic data using Haplotypecaller

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    Gökalp Çelik

    Hi Steven Gage

    Looks like when the cram file was sliced to remove unauthorized regions some of the reads seem to have lost their pair therefore processing fails to complete without them. In this case there are a bunch of things that need to be performed such as 

    1- Removing all singleton reads that have lost their pairs

    2- Realigning and merging files with the new set of properly paired reads. 

    On the other hand if those cram files were already aligned and just had removed some of the regions then you don't need to realign all files again and just continue with variant calling steps. 

    I hope this helps. 

     

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    Steven Gage

    I was using WARP pipelines to run variant calling, which requires unmapped BAM files for arguments, but I can circumvent this by using a different variant calling and passing it the aligned BAM files. Thank you!

    Steve

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