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Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling

The papillomaviruses (PVs) are a family of viruses infecting several mammalian and nonmammalian species that cause cervical cancer in humans. The evolutionary history of the PVs as it associated with a wide range of host species is not well understood. Incongruities between the phylogenetic trees of...

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Autores principales: Shah, Seena D., Doorbar, John, Goldstein, Richard A.
Formato: Texto
Lenguaje:English
Publicado: Oxford University Press 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872622/
https://www.ncbi.nlm.nih.gov/pubmed/20093429
http://dx.doi.org/10.1093/molbev/msq015
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author Shah, Seena D.
Doorbar, John
Goldstein, Richard A.
author_facet Shah, Seena D.
Doorbar, John
Goldstein, Richard A.
author_sort Shah, Seena D.
collection PubMed
description The papillomaviruses (PVs) are a family of viruses infecting several mammalian and nonmammalian species that cause cervical cancer in humans. The evolutionary history of the PVs as it associated with a wide range of host species is not well understood. Incongruities between the phylogenetic trees of various viral genes as well as between these genes and the host phylogenies suggest historical viral recombination as well as violations of strict virus–host cospeciation. The extent of recombination events among PVs is uncertain, however, and there is little evidence to support a theory of PV spread via recent host transfers. We have investigated incongruence between PV genes and hence, the possibility of recombination, using Bayesian phylogenetic methods. We find significant evidence for phylogenetic incongruence among the six PV genes E1, E2, E6, E7, L1, and L2, indicating substantial recombination. Analysis of E1 and L1 phylogenies suggests ancestral recombination events. We also describe a new method for examining alternative host–parasite association mechanisms by applying importance sampling to Bayesian divergence time estimation. This new approach is not restricted by a fixed viral tree topology or knowledge of viral divergence times, multiple parasite taxa per host may be included, and it can distinguish between prior divergence of the virus before host speciation and host transfer of the virus following speciation. Using this method, we find prior divergence of PV lineages associated with the ancestral mammalian host resulting in at least 6 PV lineages prior to speciation of this host. These PV lineages have then followed paths of prior divergence and cospeciation to eventually become associated with the extant host species. Only one significant instance of host transfer is supported, the transfer of the ancestral L1 gene between a Primate and Hystricognathi host based on the divergence times between the υ human type 41 and porcupine PVs.
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spelling pubmed-28726222010-05-24 Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling Shah, Seena D. Doorbar, John Goldstein, Richard A. Mol Biol Evol Research Articles The papillomaviruses (PVs) are a family of viruses infecting several mammalian and nonmammalian species that cause cervical cancer in humans. The evolutionary history of the PVs as it associated with a wide range of host species is not well understood. Incongruities between the phylogenetic trees of various viral genes as well as between these genes and the host phylogenies suggest historical viral recombination as well as violations of strict virus–host cospeciation. The extent of recombination events among PVs is uncertain, however, and there is little evidence to support a theory of PV spread via recent host transfers. We have investigated incongruence between PV genes and hence, the possibility of recombination, using Bayesian phylogenetic methods. We find significant evidence for phylogenetic incongruence among the six PV genes E1, E2, E6, E7, L1, and L2, indicating substantial recombination. Analysis of E1 and L1 phylogenies suggests ancestral recombination events. We also describe a new method for examining alternative host–parasite association mechanisms by applying importance sampling to Bayesian divergence time estimation. This new approach is not restricted by a fixed viral tree topology or knowledge of viral divergence times, multiple parasite taxa per host may be included, and it can distinguish between prior divergence of the virus before host speciation and host transfer of the virus following speciation. Using this method, we find prior divergence of PV lineages associated with the ancestral mammalian host resulting in at least 6 PV lineages prior to speciation of this host. These PV lineages have then followed paths of prior divergence and cospeciation to eventually become associated with the extant host species. Only one significant instance of host transfer is supported, the transfer of the ancestral L1 gene between a Primate and Hystricognathi host based on the divergence times between the υ human type 41 and porcupine PVs. Oxford University Press 2010-06 2010-01-21 /pmc/articles/PMC2872622/ /pubmed/20093429 http://dx.doi.org/10.1093/molbev/msq015 Text en © The Authors 2010. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Shah, Seena D.
Doorbar, John
Goldstein, Richard A.
Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling
title Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling
title_full Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling
title_fullStr Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling
title_full_unstemmed Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling
title_short Analysis of Host–Parasite Incongruence in Papillomavirus Evolution Using Importance Sampling
title_sort analysis of host–parasite incongruence in papillomavirus evolution using importance sampling
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872622/
https://www.ncbi.nlm.nih.gov/pubmed/20093429
http://dx.doi.org/10.1093/molbev/msq015
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