Enables signaling receptor binding activity. Involved in dendrite arborization; positive regulation of neuron projection arborization; and protein transport. Located in neuronal cell body. Is active in glutamatergic synapse and postsynaptic density. Human ortholog(s) of this gene implicated in Fraser syndrome 3. Orthologous to human GRIP1 (glutamate receptor interacting protein 1). [provided by Alliance of Genome Resources, Apr 2022]