The Influence of HIV on the Evolution of Mycobacterium tuberculosis
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Published version
Author(s)
Type
Journal Article
Abstract
HIV significantly affects the immunological environment during tuberculosis coinfection, and therefore may influence the selective landscape upon which M. tuberculosis evolves. To test this hypothesis whole genome sequences were determined for 169 South African M. tuberculosis strains from HIV-1 coinfected and uninfected individuals and analyzed using two Bayesian codon-model based selection analysis approaches: FUBAR which was used to detect persistent positive and negative selection (selection respectively favoring and disfavoring nonsynonymous substitutions); and MEDS which was used to detect episodic directional selection specifically favoring nonsynonymous substitutions within HIV-1 infected individuals. Among the 25,251 polymorphic codon sites analyzed, FUBAR revealed that 189-fold more were detectably evolving under persistent negative selection than were evolving under persistent positive selection. Three specific codon sites within the genes celA2b, katG, and cyp138 were identified by MEDS as displaying significant evidence of evolving under directional selection influenced by HIV-1 coinfection. All three genes encode proteins that may indirectly interact with human proteins that, in turn, interact functionally with HIV proteins. Unexpectedly, epitope encoding regions were enriched for sites displaying weak evidence of directional selection influenced by HIV-1. Although the low degree of genetic diversity observed in our M. tuberculosis data set means that these results should be interpreted carefully, the effects of HIV-1 on epitope evolution in M. tuberculosis may have implications for the design of M. tuberculosis vaccines that are intended for use in populations with high HIV-1 infection rates.
Date Issued
2017-03-21
Date Acceptance
2017-03-01
Citation
Molecular Biology and Evolution, 2017, 34 (7), pp.1654-1668
ISSN
1537-1719
Publisher
Oxford University Press (OUP)
Start Page
1654
End Page
1668
Journal / Book Title
Molecular Biology and Evolution
Volume
34
Issue
7
Copyright Statement
© The Author 2017. Published by Oxford University Press on be
half of the Society for Molecular Biology and Evolution.
This is an Open Access article distributed un
der the terms of the Creative Commons Attrib
ution License (http://creativecommons.
org/licenses/by/4.0/), which permits unrest
ricted reuse, distribution, and reproduction
in any medium, provided the original work is
properly cited.
half of the Society for Molecular Biology and Evolution.
This is an Open Access article distributed un
der the terms of the Creative Commons Attrib
ution License (http://creativecommons.
org/licenses/by/4.0/), which permits unrest
ricted reuse, distribution, and reproduction
in any medium, provided the original work is
properly cited.
Sponsor
Wellcome Trust
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000402754400009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
104803/Z/14/ZR
Subjects
Science & Technology
Life Sciences & Biomedicine
Biochemistry & Molecular Biology
Evolutionary Biology
Genetics & Heredity
evolution
Mycobacterium tuberculosis
HIV coinfection
natural selection
HUMAN-IMMUNODEFICIENCY-VIRUS
MONOMORPHIC BACTERIAL PATHOGENS
REACTOME PATHWAY KNOWLEDGEBASE
SOUTH-AFRICAN COMMUNITY
DRUG-RESISTANCE
INFECTION
SELECTION
SEQUENCE
SUBTYPE
HUMANS
Publication Status
Published