Enables protein binding activity involved in heterotypic cell-cell adhesion. Involved in cell-cell adhesion; nervous system development; and regulation of postsynapse organization. Acts upstream of or within several processes, including neuron development; neuronal action potential propagation; and regulation of neuron projection development. Located in axon; plasma membrane; and synapse. Is integral component of postsynaptic density membrane. Is active in glutamatergic synapse. Is integral component of postsynaptic membrane. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; integumental system; and sensory organ. Used to study autism spectrum disorder. Orthologous to human NRCAM (neuronal cell adhesion molecule). [provided by Alliance of Genome Resources, Apr 2022]