Rab7A is required for efficient production of infectious HIV-1. - Inserm - Institut national de la santé et de la recherche médicale Accéder directement au contenu
Article Dans Une Revue PLoS Pathogens Année : 2011

Rab7A is required for efficient production of infectious HIV-1.

Résumé

Retroviruses take advantage of cellular trafficking machineries to assemble and release new infectious particles. Rab proteins regulate specific steps in intracellular membrane trafficking by recruiting tethering, docking and fusion factors, as well as the actin- and microtubule-based motor proteins that facilitate vesicle traffic. Using virological tests and RNA interference targeting Rab proteins, we demonstrate that the late endosome-associated Rab7A is required for HIV-1 propagation. Analysis of the late steps of the HIV infection cycle shows that Rab7A regulates Env processing, the incorporation of mature Env glycoproteins into viral particles and HIV-1 infectivity. We also show that siRNA-mediated Rab7A depletion induces a BST2/Tetherin phenotype on HIV-1 release. BST2/Tetherin is a restriction factor that impedes HIV-1 release by tethering mature virus particles to the plasma membrane. Our results suggest that Rab7A contributes to the mechanism by which Vpu counteracts the restriction factor BST2/Tetherin and rescues HIV-1 release. Altogether, our results highlight new roles for a major regulator of the late endocytic pathway, Rab7A, in the late stages of the HIV-1 replication cycle.
Fichier principal
Vignette du fichier
journal.ppat.1002347.pdf (7.5 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

inserm-00693726 , version 1 (02-05-2012)

Identifiants

Citer

Marina Caillet, Katy Janvier, Annegret Pelchen-Matthews, Delphine Delcroix-Genête, Gregory Camus, et al.. Rab7A is required for efficient production of infectious HIV-1.: Rab7A and Production of Infectious HIV Particles. PLoS Pathogens, 2011, 7 (11), pp.e1002347. ⟨10.1371/journal.ppat.1002347⟩. ⟨inserm-00693726⟩
148 Consultations
212 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More