An effort to use human-based exome capture methods to analyze chimpanzee and macaque exomes

PLoS One. 2012;7(7):e40637. doi: 10.1371/journal.pone.0040637. Epub 2012 Jul 27.

Abstract

Non-human primates have emerged as an important resource for the study of human disease and evolution. The characterization of genomic variation between and within non-human primate species could advance the development of genetically defined non-human primate disease models. However, non-human primate specific reagents that would expedite such research, such as exon-capture tools, are lacking. We evaluated the efficiency of using a human exome capture design for the selective enrichment of exonic regions of non-human primates. We compared the exon sequence recovery in nine chimpanzees, two crab-eating macaques and eight Japanese macaques. Over 91% of the target regions were captured in the non-human primate samples, although the specificity of the capture decreased as evolutionary divergence from humans increased. Both intra-specific and inter-specific DNA variants were identified; Sanger-based resequencing validated 85.4% of 41 randomly selected SNPs. Among the short indels identified, a majority (54.6%-77.3%) of the variants resulted in a change of 3 base pairs, consistent with expectations for a selection against frame shift mutations. Taken together, these findings indicate that use of a human design exon-capture array can provide efficient enrichment of non-human primate gene regions. Accordingly, use of the human exon-capture methods provides an attractive, cost-effective approach for the comparative analysis of non-human primate genomes, including gene-based DNA variant discovery.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Exome*
  • Humans
  • Macaca fascicularis / genetics*
  • Oligonucleotide Array Sequence Analysis
  • Pan troglodytes / genetics*
  • Polymorphism, Single Nucleotide*

Grants and funding

This study was funded by the National Science and Technology Major Project of Key Drug Innovation and Development (2011ZX09307-303-03), the Science and Technology Planning Project of Guangdong Province, China (2010B060200007) and the Fundamental Research Funds for the Central Universities (2012zz0091, 2012ZZ0093 and 2011ZM0111). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.