Enables several functions, including calcium channel regulator activity; cell adhesion molecule binding activity; and neuroligin family protein binding activity. Involved in postsynapse organization and signal transduction. Acts upstream of or within neurotransmitter secretion and synapse assembly. Part of protein-containing complex. Is expressed in several structures, including blood vessel; nervous system; and retina. Used to study autism spectrum disorder. Orthologous to human NRXN2 (neurexin 2). [provided by Alliance of Genome Resources, Apr 2022]