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Primate evolution of the recombination regulator PRDM9

Author

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  • Jerrod J. Schwartz

    (University of Washington School of Medicine)

  • David J. Roach

    (University of Washington School of Medicine)

  • James H. Thomas

    (University of Washington School of Medicine)

  • Jay Shendure

    (University of Washington School of Medicine)

Abstract

The PRDM9 gene encodes a protein with a highly variable tandem-repeat zinc finger (ZF) DNA-binding domain that plays a key role in determining sequence-specific hotspots of meiotic recombination genome wide. Here we survey the diversity of the PRDM9 ZF domain by sequencing this region in 64 primates from 18 species, revealing 68 unique alleles across all groups. We report ubiquitous positive selection at nucleotide positions corresponding to DNA contact residues and the expansion of ZFs within clades, which confirms the rapid evolution of the ZF domain throughout the primate lineage. Alignment of Neandertal and Denisovan sequences suggests that PRDM9 in archaic hominins was closely related to present-day human alleles that are rare and specific to African populations. In the context of its role in reproduction, our results are consistent with variation in PRDM9 contributing to speciation events in primates.

Suggested Citation

  • Jerrod J. Schwartz & David J. Roach & James H. Thomas & Jay Shendure, 2014. "Primate evolution of the recombination regulator PRDM9," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5370
    DOI: 10.1038/ncomms5370
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