Abstract
Pathogens have played a substantial role in human evolution, with past infections shaping genetic variation at loci influencing immune function. We selected 168 genes known to be involved in the immune response, genotyped common single nucleotide polymorphisms across each gene in three population samples (CEPH Europeans from Utah, Han Chinese from Guangxi, and Yoruba Nigerians from Southwest Nigeria) and searched for evidence of selection based on four tests for non-neutral evolution: minor allele frequency (MAF), derived allele frequency (DAF), Fst versus heterozygosity and extended haplotype homozygosity (EHH). Six of the 168 genes show some evidence for non-neutral evolution in this initial screen, with two showing similar signals in independent data from the International HapMap Project. These analyses identify two loci involved in immune function that are candidates for having been subject to evolutionary selection, and highlight a number of analytical challenges in searching for selection in genome-wide polymorphism data.
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Acknowledgments
E.C.W was supported by a Cancer Research Institute fellowship. PCS is funded by the Damon Runyon Cancer Research Foundation and by a L’Oreal Women in Science Award. H.B.H. is an NCI Cancer Research Training Award (CRTA) Postdoctoral Fellow. This work was funded through a special grant from the National Institutes of Health National Institute of Allergy and Infectious Disease. This publication has been funded in whole or in part with Federal funds from the National Cancer Institute, National Institutes of Health, under contract no. NO1-CO-12400. The content of this publication does not necessarily reflect the views or policies of the Department of Health and Human Services, nor does mention of trade names, commercial products, or organizations imply endorsement by the US Government. This research was support in part by the Intramural Research Program of the NIH, National Cancer Institute, Center for Cancer Research.
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Emily C. Walsh, Pardis Sabeti, Holli B. Hutcheson, and Ben Fry have contributed equally to this work and Stephen O’Brien and David Altshuler have jointly supervised this project
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Walsh, E.C., Sabeti, P., Hutcheson, H.B. et al. Searching for signals of evolutionary selection in 168 genes related to immune function. Hum Genet 119, 92–102 (2006). https://doi.org/10.1007/s00439-005-0090-0
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DOI: https://doi.org/10.1007/s00439-005-0090-0