Automated description from the Alliance of Genome Resources (Release 7.1.0)
Involved in synapse maturation and trans-synaptic signaling, modulating synaptic transmission. Located in external side of plasma membrane; inhibitory synapse; and presynaptic membrane. Is active in postsynaptic density membrane. Is expressed in several structures, including brain; ganglia; genitourinary system; hemolymphoid system gland; and retina. Orthologous to human IGSF21 (immunoglobin superfamily member 21).