Predicted to enable channel regulator activity. Involved in neurotransmitter receptor localization to postsynaptic specialization membrane. Is active in glutamatergic synapse. Is expressed in several structures, including alimentary system; genitourinary system; nervous system; sensory organ; and skeleton. Orthologous to human CNIH3 (cornichon family AMPA receptor auxiliary protein 3). [provided by Alliance of Genome Resources, Apr 2022]