Enables identical protein binding activity. Involved in postsynapse organization. Located in several cellular components, including neuronal cell body; postsynaptic density; and postsynaptic membrane. Is active in glutamatergic synapse. Is extrinsic component of postsynaptic density membrane. Human ortholog(s) of this gene implicated in syndromic X-linked mental retardation Hough type. Orthologous to human CNKSR2 (connector enhancer of kinase suppressor of Ras 2). [provided by Alliance of Genome Resources, Apr 2022]