Predicted to enable amyloid-beta binding activity and identical protein binding activity. Involved in regulation of synaptic vesicle exocytosis. Acts upstream of or within several processes, including chemical synaptic transmission; in utero embryonic development; and locomotory behavior. Located in Schaffer collateral - CA1 synapse. Is expressed in several structures, including alimentary system; nervous system; respiratory system; sensory organ; and skeleton. Orthologous to human APBA2 (amyloid beta precursor protein binding family A member 2). [provided by Alliance of Genome Resources, Apr 2022]