Involved in exocytosis by regulating a late step in synaptic vesicle fusion. Could play a role in neurotransmitter release by regulating membrane flow in the nerve terminal. Heterodimer with RIMS2. Part of a ternary complex involving PCLO and EPAC2. Interacts with RPH3A. Interacts with the exocyst complex through SEC15. Binds SYTL4, RIMS1 and RIMS2. Interacts with RAB3IP. Interacts with SGSM1 and SGSM3. Specifically expressed in brain. Belongs to the small GTPase superfamily. Rab family. Note: This description may include information from UniProtKB.
Protein type: G protein, monomeric, Rab; G protein; G protein, monomeric
Molecular Function: GTPase activity; protein C-terminus binding; ATPase activator activity; protein binding; GTPase binding; GDP binding; GTP binding; myosin V binding; ATPase binding
Biological Process: mitochondrion organization and biogenesis; synaptic vesicle maturation; metabolic process; neurotransmitter secretion; regulation of synaptic vesicle fusion to presynaptic membrane; constitutive secretory pathway; protein secretion; regulation of short-term neuronal synaptic plasticity; post-embryonic development; respiratory system process; synaptic transmission; intracellular protein transport; synaptic vesicle exocytosis; glutamate secretion; axonogenesis; sensory perception of touch; positive regulation of ATPase activity; maintenance of presynaptic active zone structure; neuromuscular synaptic transmission; response to electrical stimulus; Rab protein signal transduction; vesicle docking during exocytosis; lung development; positive regulation of exocytosis
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.