In vitro functional analyses of the human immunodeficiency virus type 1 (HIV-1) integrase mutants give new insights into the intasome assembly.
Virology
; 439(2): 97-104, 2013 May 10.
Article
en En
| MEDLINE
| ID: mdl-23473371
ABSTRACT
A functional study of mutants of the human immunodeficiency virus type 1 (HIV-1) integrase (IN) was conducted with the support of a recently proposed HIV-1 intasome model. Firstly, we investigated the predicted position of the C-terminal domain (CTD) and the flexibility of the alpha-6 helix by mutating the residue Ile-203. This had no impact on the 3'-processing reaction but reduced the strand transfer reaction and the formation of tetramers. Secondly, the residues Ile-141 of the catalytic loop and Glu-246 of the CTD are predicted to bind the Td-3 base of the viral DNA maintaining it in a "flipped out" position and stabilizing the catalytic core domain (CCD)-CTD interface. Our data showed that the Ile-141/Td-3 interaction was important for the strand transfer activity and the oligomerization of IN. Interestingly, mutating the Glu-246 residue by an alanine enhanced half- and full-site integrations, suggesting that this residue may not be optimized for integration.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
VIH-1
/
Integración Viral
/
Integrasa de VIH
/
Mutación Missense
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Año:
2013
Tipo del documento:
Article