Unique spectrum of activity of prosimian TRIM5alpha against exogenous and endogenous retroviruses.

Details

Serval ID
serval:BIB_9D875230D1C1
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Unique spectrum of activity of prosimian TRIM5alpha against exogenous and endogenous retroviruses.
Journal
Journal of Virology
Author(s)
Rahm N., Yap M., Snoeck J., Zoete V., Muñoz M., Radespiel U., Zimmermann E., Michielin O., Stoye J.P., Ciuffi A., Telenti A.
ISSN
1098-5514 (Electronic)
ISSN-L
0022-538X
Publication state
Published
Issued date
2011
Volume
85
Number
9
Pages
4173-4183
Language
english
Abstract
Lentiviruses, the genus of retrovirus that includes HIV-1, rarely endogenize. Some lemurs uniquely possess an endogenous lentivirus called PSIV ("prosimian immunodeficiency virus"). Thus, lemurs provide the opportunity to study the activity of host defense factors, such as TRIM5α, in the setting of germ line invasion. We characterized the activities of TRIM5α proteins from two distant lemurs against exogenous retroviruses and a chimeric PSIV. TRIM5α from gray mouse lemur, which carries PSIV in its genome, exhibited the narrowest restriction activity. One allelic variant of gray mouse lemur TRIM5α restricted only N-tropic murine leukemia virus (N-MLV), while a second variant restricted N-MLV and, uniquely, B-tropic MLV (B-MLV); both variants poorly blocked PSIV. In contrast, TRIM5α from ring-tailed lemur, which does not contain PSIV in its genome, revealed one of the broadest antiviral activities reported to date against lentiviruses, including PSIV. Investigation into the antiviral specificity of ring-tailed lemur TRIM5α demonstrated a major contribution of a 32-amino-acid expansion in variable region 2 (v2) of the B30.2/SPRY domain to the breadth of restriction. Data on lemur TRIM5α and the prediction of ancestral simian sequences hint at an evolutionary scenario where antiretroviral specificity is prominently defined by the lineage-specific expansion of the variable loops of B30.2/SPRY.
Keywords
Amino Acid Sequence, Animals, Carrier Proteins/chemistry, Carrier Proteins/genetics, Cluster Analysis, Evolution, Molecular, Lemur/immunology, Models, Molecular, Molecular Sequence Data, Phylogeny, Protein Structure, Tertiary, Retroviridae/immunology, Sequence Homology, Amino Acid
Pubmed
Web of science
Open Access
Yes
Create date
03/09/2011 20:10
Last modification date
20/08/2019 15:03
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