Enables calcium-dependent protein binding activity. Predicted to be involved in calcium-ion regulated exocytosis; neurotransmitter secretion; and synaptic vesicle clustering. Located in synaptic vesicle. Is extrinsic component of synaptic vesicle membrane. Human ortholog(s) of this gene implicated in schizophrenia. Orthologous to human SYN2 (synapsin II). [provided by Alliance of Genome Resources, Apr 2022]