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Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions

Mutation rate variation has the potential to bias evolutionary inference, particularly when rates become much higher than the mean. We first confirm prior work that inferred the existence of cryptic, site-specific rate variation on the basis of coincident polymorphisms—sites that are segregating in...

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Autores principales: Johnson, Philip L. F., Hellmann, Ines
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3172574/
https://www.ncbi.nlm.nih.gov/pubmed/21572094
http://dx.doi.org/10.1093/gbe/evr044
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author Johnson, Philip L. F.
Hellmann, Ines
author_facet Johnson, Philip L. F.
Hellmann, Ines
author_sort Johnson, Philip L. F.
collection PubMed
description Mutation rate variation has the potential to bias evolutionary inference, particularly when rates become much higher than the mean. We first confirm prior work that inferred the existence of cryptic, site-specific rate variation on the basis of coincident polymorphisms—sites that are segregating in both humans and chimpanzees. Then we extend this observation to a longer evolutionary timescale by identifying sites of coincident substitutions using four species. From these data, we develop analytic theory to infer the variance and skewness of the distribution of mutation rates. Even excluding CpG dinucleotides, we find a relatively large coefficient of variation and positive skew, which suggests that, although most sites in the genome have mutation rates near the mean, the distribution contains a long right-hand tail with a small number of sites having high mutation rates. At least for primates, these quickly mutating sites are few enough that the infinite sites model in population genetics remains appropriate.
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spelling pubmed-31725742011-09-14 Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions Johnson, Philip L. F. Hellmann, Ines Genome Biol Evol Research Articles Mutation rate variation has the potential to bias evolutionary inference, particularly when rates become much higher than the mean. We first confirm prior work that inferred the existence of cryptic, site-specific rate variation on the basis of coincident polymorphisms—sites that are segregating in both humans and chimpanzees. Then we extend this observation to a longer evolutionary timescale by identifying sites of coincident substitutions using four species. From these data, we develop analytic theory to infer the variance and skewness of the distribution of mutation rates. Even excluding CpG dinucleotides, we find a relatively large coefficient of variation and positive skew, which suggests that, although most sites in the genome have mutation rates near the mean, the distribution contains a long right-hand tail with a small number of sites having high mutation rates. At least for primates, these quickly mutating sites are few enough that the infinite sites model in population genetics remains appropriate. Oxford University Press 2011-05-13 /pmc/articles/PMC3172574/ /pubmed/21572094 http://dx.doi.org/10.1093/gbe/evr044 Text en © The Author(s) 2011. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. http://creativecommons.org/licenses/by-nc/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Johnson, Philip L. F.
Hellmann, Ines
Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions
title Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions
title_full Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions
title_fullStr Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions
title_full_unstemmed Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions
title_short Mutation Rate Distribution Inferred from Coincident SNPs and Coincident Substitutions
title_sort mutation rate distribution inferred from coincident snps and coincident substitutions
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3172574/
https://www.ncbi.nlm.nih.gov/pubmed/21572094
http://dx.doi.org/10.1093/gbe/evr044
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