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Communications
WGSA: an annotation pipeline for human genome sequencing studies
  1. Xiaoming Liu1,2,
  2. Simon White3,
  3. Bo Peng4,
  4. Andrew D Johnson5,6,
  5. Jennifer A Brody7,
  6. Alexander H Li1,
  7. Zhuoyi Huang3,
  8. Andrew Carroll8,
  9. Peng Wei1,9,
  10. Richard Gibbs3,
  11. Robert J Klein10,
  12. Eric Boerwinkle1,2,3
  1. 1Human Genetics Center, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA
  2. 2Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA
  3. 3Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, USA
  4. 4Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
  5. 5NHLBI Framingham Heart Study, Bethesda, Maryland, USA
  6. 6Population Sciences Branch, NHLBI Division of Intramural Research, Bethesda, Maryland, USA
  7. 7Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, Washington, USA
  8. 8DNAnexus, Mountain View, California, USA
  9. 9Department of Biostatistics, School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA
  10. 10Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, Icahn Institute for Genomics and Multiscale Biology, New York, New York, USA
  1. Correspondence to Dr Xiaoming Liu, University of Texas School of Public Health, Human Genetics Center, 1200 Herman Pressler Street, E529, Houston, TX 77030, USA; Xiaoming.Liu{at}uth.tmc.edu

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DNA sequencing technologies continue to make progress in increased throughput and quality, and decreased cost. As we transition from whole exome capture sequencing to whole genome sequencing (WGS), our ability to convert machine-generated variant calls, including single nucleotide variant (SNV) and insertion-deletion variants (indels), into human-interpretable knowledge has lagged far behind the ability to obtain enormous amounts of variants. To help narrow this gap, here we present WGSA (WGS annotator), a functional annotation pipeline for human genome sequencing studies, which is runnable out of the box on the Amazon Compute Cloud and is freely downloadable at (https://sites.google.com/site/jpopgen/wgsa/).

Functional annotation is a key step in WGS analysis. In one way, annotation helps the analyst filter to a subset of elements of particular interest (eg, cell type specific enhancers), in another way annotation helps the investigators to increase the power of identifying phenotype-associated loci (eg, association test using functional prediction score as a weight) and interpret potentially interesting findings. Currently, there are several popular gene model based annotation tools, including ANNOVAR,1 SnpEff2 and the Ensembl Variant Effect Predictor (VEP).3 These can annotate a variety of protein coding and non-coding gene models from a range of species. It is well known among practitioners that different databases (eg, RefSeq4 and Ensembl5) use different models for …

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