Predicted to enable calmodulin binding activity and identical protein binding activity. Involved in presynaptic modulation of chemical synaptic transmission; regulation of glutamatergic synaptic transmission; and regulation of synaptic vesicle exocytosis. Located in synaptic vesicle. Is active in calyx of Held and glutamatergic synapse. Is extrinsic component of synaptic vesicle membrane. Orthologous to human TPRG1L (tumor protein
p63 regulated 1 like); INTERACTS WITH 2,3,7,8-tetrachlorodibenzodioxine; 3-chloropropane-1,2-diol; 6-propyl-2-thiouracil.