Retrospective evaluation of whole exome and genome mutation calls in 746 cancer samples

Matthew H. Bailey, William U. Meyerson, Lewis Jonathan Dursi, Liang Bo Wang, Guanlan Dong, Wen Wei Liang, Amila Weerasinghe, Shantao Li*, Sean Kelso, Rehan Akbani, Pavana Anur, Alex Buchanan, Kami Chiotti, Kyle Covington, Allison Creason, Li Ding*, Kyle Ellrott, Yu Fan, Steven Foltz, Gad GetzWalker Hale, David Haussler, Julian M. Hess, Carolyn M. Hutter, Cyriac Kandoth, Katayoon Kasaian, Melpomeni Kasapi, Dave Larson, Ignaty Leshchiner, John Letaw, Singer Ma*, Michael D. McLellan, Yifei Men, Gordon B. Mills, Beifang Niu, Myron Peto, Amie Radenbaugh, Sheila M. Reynolds, Gordon Saksena, Heidi Sofia, Chip Stewart, Adam J. Struck, Joshua M. Stuart, Wenyi Wang, John N. Weinstein, David A. Wheeler, Christopher K. Wong, Liu Xi, Kai Ye, MC3 Working Group, PCAWG Consortium, PCAWG novel somatic mutation calling methods working group, David Townend, Mark Gerstein*, L. Ding*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The Cancer Genome Atlas (TCGA) and International Cancer Genome Consortium (ICGC) curated consensus somatic mutation calls using whole exome sequencing (WES) and whole genome sequencing (WGS), respectively. Here, as part of the ICGC/TCGA Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium, which aggregated whole genome sequencing data from 2,658 cancers across 38 tumour types, we compare WES and WGS side-by-side from 746 TCGA samples, finding that ~80% of mutations overlap in covered exonic regions. We estimate that low variant allele fraction (VAF < 15%) and clonal heterogeneity contribute up to 68% of private WGS mutations and 71% of private WES mutations. We observe that ~30% of private WGS mutations trace to mutations identified by a single variant caller in WES consensus efforts. WGS captures both ~50% more variation in exonic regions and un-observed mutations in loci with variable GC-content. Together, our analysis highlights technological divergences between two reproducible somatic variant detection efforts.
Original languageEnglish
Article number4748
Number of pages27
JournalNature Communications
Volume11
Issue number1
DOIs
Publication statusPublished - 21 Sept 2020

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