Small G protein signaling modulator 1 (Sgsm1)

Interacts with numerous Rab family members, working as Rab effector for some, and as GTPase activator for many others. Promotes GTP hydrolysis by RAB34 and RAB36.

Probably functions as GTPase effector with RAB9A and RAB9B; doesn't stimulate GTP hydrolysis with RAB9A and RAB9B. .