Enables identical protein binding activity. Predicted to be involved in regulation of glutamatergic synaptic transmission. Predicted to be located in calyx of Held. Predicted to be active in synaptic vesicle. Is expressed in several structures, including gut; hemolymphoid system gland; male reproductive gland or organ; nervous system; and nose. Orthologous to human TPRG1L (tumor protein p63 regulated 1 like). [provided by Alliance of Genome Resources, Apr 2022]