unc-10 encodes a protein with zinc-finger, Q/N-rich, PDZ, and C2 domains that is homologous to vertebrate Rim1, a presynaptic protein which binds, and effects the activity of, synaptic vesicle-associated GTP-Rab3; UNC-10 is required for normal locomotion and synaptic transmission, and localizes to a subdomain of presynaptic termini, where it probably acts to regulate the priming step of presynaptic vesicle fusion by promoting conformational changes in syntaxin.
Enables small GTPase binding activity. Involved in several processes, including chemical synaptic transmission; defecation; and positive regulation of cholinergic synaptic transmission. Located in axon and presynaptic active zone. Expressed in dorsal nerve cord; nerve ring; nervous system; uv1; and ventral nerve cord. Is an ortholog of human RIMS1 (regulating synaptic membrane exocytosis 1).