Enables SNAP receptor activity and syntaxin binding activity. Involved in several processes, including exocytic insertion of neurotransmitter receptor to postsynaptic membrane; regulation of exocytosis; and vesicle-mediated transport in synapse. Located in plasma membrane. Part of SNARE complex. Is active in GABA-ergic synapse; glutamatergic synapse; and postsynapse. Orthologous to human SNAP23 (synaptosome associated protein 23). [provided by Alliance of Genome Resources, Apr 2022]