Involved in modulation of chemical synaptic transmission; regulation of grooming behavior; and regulation of synapse organization. Located in dendrite and presynaptic membrane. Is integral component of presynaptic membrane. Is active in GABA-ergic synapse. Is expressed in brain. Orthologous to human CNTNAP4 (contactin associated protein family member 4). [provided by Alliance of Genome Resources, Apr 2022]