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3011237 
Journal Article 
Rab27a controls HIV-1 assembly by regulating plasma membrane levels of phosphatidylinositol 4,5-bisphosphate 
Gerber, PP; Cabrini, M; Jancic, C; Paoletti, L; Banchio, C; von Bilderling, C; Sigaut, L; Pietrasanta, LI; Duette, G; Freed, EO; Basile, G; Moita, CF; Moita, LF; Amigorena, S; Benaroch, P; Geffner, J; Ostrowski, M 
2015 
Yes 
Journal of Cell Biology
ISSN: 0021-9525
EISSN: 1540-8140 
209 
3 
435-452 
English 
25940347 
WOS:000354280600014 
During the late stages of the HIV-1 replication cycle, the viral polyprotein Pr55(Gag) is recruited to the plasma membrane (PM), where it binds phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) and directs HIV-1 assembly. We show that Rab27a controls the trafficking of late endosomes carrying phosphatidylinositol 4-kinase type 2 α (PI4KIIα) toward the PM of CD4(+) T cells. Hence, Rab27a promotes high levels of PM phosphatidylinositol 4-phosphate and the localized production of PI(4,5)P2, therefore controlling Pr55(Gag) membrane association. Rab27a also controls PI(4,5)P2 levels at the virus-containing compartments of macrophages. By screening Rab27a effectors, we identified that Slp2a, Slp3, and Slac2b are required for the association of Pr55(Gag) with the PM and that Slp2a cooperates with Rab27a in the recruitment of PI4KIIα to the PM. We conclude that by directing the trafficking of PI4KIIα-positive endosomes toward the PM, Rab27a controls PI(4,5)P2 production and, consequently, HIV-1 replication.