Abundant contribution of short tandem repeats to gene expression variation in humans

Melissa Gymrek, Thomas Willems, Audrey Guilmatre, Haoyang Zeng, Barak Markus, Stoyan Georgiev, Mark J. Daly, Alkes L. Price, Jonathan K. Pritchard, Andrew J. Sharp, Yaniv Erlich

Research output: Contribution to journalArticlepeer-review

218 Scopus citations

Abstract

The contribution of repetitive elements to quantitative human traits is largely unknown. Here we report a genome-wide survey of the contribution of short tandem repeats (STRs), which constitute one of the most polymorphic and abundant repeat classes, to gene expression in humans. Our survey identified 2,060 significant expression STRs (eSTRs). These eSTRs were replicable in orthogonal populations and expression assays. We used variance partitioning to disentangle the contribution of eSTRs from that of linked SNPs and indels and found that eSTRs contribute 10-15% of the cis heritability mediated by all common variants. Further functional genomic analyses showed that eSTRs are enriched in conserved regions, colocalize with regulatory elements and may modulate certain histone modifications. By analyzing known genome-wide association study (GWAS) signals and searching for new associations in 1,685 whole genomes from deeply phenotyped individuals, we found that eSTRs are enriched in various clinically relevant conditions. These results highlight the contribution of STRs to the genetic architecture of quantitative human traits.

Original languageEnglish
Pages (from-to)22-29
Number of pages8
JournalNature Genetics
Volume48
Issue number1
DOIs
StatePublished - 29 Dec 2015

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