Predicted to enable SNARE binding activity and neurotransmitter transmembrane transporter activity. Predicted to be involved in regulation of neurotransmitter secretion; regulation of synaptic vesicle fusion to presynaptic active zone membrane; and signal release. Predicted to be located in cytosol; plasma membrane; and synapse. Predicted to be part of SNARE complex. Predicted to be active in photoreceptor ribbon synapse and terminal bouton. Predicted to be anchored component of presynaptic active zone membrane and anchored component of synaptic vesicle membrane. Orthologous to human CPLX3 (complexin 3). [provided by Alliance of Genome Resources, Apr 2022]