Enables cadherin binding activity involved in cell-cell adhesion and identical protein binding activity. Involved in synapse assembly and synaptic membrane adhesion. Located in axon; dendrite; and glutamatergic synapse. Is integral component of postsynaptic membrane and integral component of presynaptic membrane. Is active in hippocampal mossy fiber to CA3 synapse. Is expressed in limb; nervous system; sensory organ; and testis. Orthologous to human CDH9 (cadherin 9). [provided by Alliance of Genome Resources, Apr 2022]