Predicted to enable calcium ion binding activity. Predicted to be involved in regulation of neurotransmitter secretion. Predicted to be located in membrane. Predicted to be active in synaptic vesicle membrane. Is expressed in several structures, including central nervous system; embryonic structure; notochord; optic cup; and pronephric duct. Orthologous to human MCTP1 (multiple C2 and transmembrane domain containing 1).