OsGAP1 functions as a positive regulator of OsRab11-mediated TGN to PM or vacuole trafficking.

The Ypt/Rab family of small G-proteins is important in regulating vesicular transport. Rabs hydrolyze GTP very slowly on their own and require GTPase-activating proteins (GAPs). Here we report the identification and characterization of OsGAP1, a Rab-specific rice GAP.