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Distinct combinations of amino acid substitutions in N-terminal domain of Gag-capsid afford HIV-1 resistance to rhesus TRIM5α.
- Source :
-
Microbes & Infection . Nov2014, Vol. 16 Issue 11, p936-944. 9p. - Publication Year :
- 2014
-
Abstract
- TRIM5α is a potent anti-retroviral factor that interacts with viral capsid (CA) in a species-specific manner. Recently, we and others reported generation of two distinct HIV-1 CAs that effectively overcome rhesus TRIM5α-imposed species barrier. In this study, to directly compare the effect of different mutations in the two HIV-1 CAs on evasion from macaque TRIM5-restriction, we newly generated macaque-tropic HIV-1 (HIV-1mt) proviral clones carrying the distinct CAs in the same genomic backbone, and examined their replication abilities in macaque TRIM5-overexpressing human cells and in rhesus cells. Comparative analysis of amino acid sequences and homology modeling-based structures revealed that, while both CAs gained some mutated amino acids with similar physicochemical properties, their overall appearances of N-terminal domains were different. Experimentally, the two CAs exhibited incomplete TRIM5α-resistance relative to SIVmac239 CA and different degrees of susceptibility to various TRIM5 proteins. Finally, two HIV-1mt clones carrying a different combination of the CA mutations were found to grow to a comparable extent in established and primary rhesus cells. Our data show that there could be some distinct CA patterns to confer significant TRIM5-resistance on HIV-1. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 12864579
- Volume :
- 16
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Microbes & Infection
- Publication Type :
- Academic Journal
- Accession number :
- 99768940
- Full Text :
- https://doi.org/10.1016/j.micinf.2014.08.017