Enables PDZ domain binding activity. Involved in several processes, including cellular response to growth factor stimulus; cellular response to hormone stimulus; and generation of neurons. Located in several cellular components, including growth cone; membrane raft; and neuronal cell body. Is active in Schaffer collateral - CA1 synapse. Used to study hydrocephalus. Biomarker of anxiety disorder; hypothyroidism; and mental depression. Human ortholog(s) of this gene implicated in MASA syndrome; hydrocephalus; ovarian carcinoma; pancreatic cancer; and schizophrenia. Orthologous to human L1CAM (L1 cell adhesion molecule). [provided by Alliance of Genome Resources, Apr 2022]