Abstract
The 17q21.31 inversion polymorphism exists either as direct (H1) or inverted (H2) haplotypes with differential predispositions to disease and selection. We investigated its genetic diversity in 2,700 individuals, with an emphasis on African populations. We characterize eight structural haplotypes due to complex rearrangements that vary in size from 1.08–1.49 Mb and provide evidence for a 30-kb H1-H2 double recombination event. We show that recurrent partial duplications of the KANSL1 gene have occurred on both the H1 and H2 haplotypes and have risen to high frequency in European populations. We identify a likely ancestral H2 haplotype (H2′) lacking these duplications that is enriched among African hunter-gatherer groups yet essentially absent from West African populations. Whereas H1 and H2 segmental duplications arose independently and before human migration out of Africa, they have reached high frequencies recently among Europeans, either because of extraordinary genetic drift or selective sweeps.
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Change history
11 July 2012
In the version of this article initially published online, the final sentence in the second paragraph of the Results section incorrectly referred to the H2-specific duplication as CNP205. The correct designation for the H2-specific duplication is CNP155. Also, in the legend to Figure 5, the phrases describing panels c and d were inadvertently switched. These errors have been corrected for the print, PDF and HTML versions of this article.
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Acknowledgements
We thank J. Akey, M. Dennis and B. Dumont for helpful discussions and C. Alkan for computational assistance. We thank Z. Jiang for his initial work on the H1-H2 alignments. We are grateful to T. Brown for assistance with manuscript preparation, to C. Lee for technical assistance and to the anonymous reviewers of this paper who provided insightful comments. We thank the 1000 Genomes Project Consortium for access to unpublished sequence data for the 17q21.31 locus. K.M.S. was supported by a Ruth L. Kirschstein National Research Service Award (NRSA) training grant to the University of Washington (T32HG00035) and an individual NRSA Fellowship (F32GM097807). C.D.C. was supported by an individual NRSA Fellowship (F32HG006070). P.H.S. was supported by a Natural Sciences and Engineering Research Council of Canada Fellowship. J.M.K. was supported by a Ruth L. Kirschstein NRSA training grant to Stanford University (T32HG000044). This work was supported by the US National Institutes of Health (grants HG002385 and HG004120 to E.E.E.). E.E.E. is an Investigator of the Howard Hughes Medical Institute.
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K.M.S., F.A. and E.E.E. designed the study. K.M.S. performed aCGH, genotyping and sequence analysis. F.A. performed FISH experiments and fosmid shotgun sequencing library construction. P.H.S. performed read depth–based copy-number analysis. J.M.K. performed sequence analysis on the double recombination region. C.D.C. performed aCGH analysis. L.V. and M.M. performed whole-genome shotgun sequencing library construction and PCR genotyping. L.S. and W.B. performed PCR genotyping and SNP array genotyping. M.I., G.L., T.B.N., S.A.O., J.-M.B. and A.F. contributed to African sample collection. M.P.D. and K.K.K. contributed to H2 Diversity Panel sample collection and genotyping. S.A.T. contributed to African sample collection and SNP array data. K.M.S., F.A., J.M.K., S.A.T. and E.E.E. contributed to data interpretation. K.M.S., F.A. and E.E.E. wrote the manuscript.
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E.E.E. is on the scientific advisory boards for Pacific Biosciences, Inc., SynapDx Corp and DNAnexus, Inc.
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Supplementary Text and Figures
Supplementary Note, Supplementary Figures 1–4 and Supplementary Tables 1 and 3–11 (PDF 1517 kb)
Supplementary Table 2
Individual-level 17q21.31 haplotype results (XLS 627 kb)
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Steinberg, K., Antonacci, F., Sudmant, P. et al. Structural diversity and African origin of the 17q21.31 inversion polymorphism. Nat Genet 44, 872–880 (2012). https://doi.org/10.1038/ng.2335
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DOI: https://doi.org/10.1038/ng.2335
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