Enables several functions, including nuclear localization sequence binding activity; transmembrane transporter binding activity; and type 3 metabotropic glutamate receptor binding activity. Involved in several processes, including negative regulation of transport; postsynapse to nucleus signaling pathway; and regulation of postsynapse to nucleus signaling pathway. Located in several cellular components, including neuronal cell body; postsynaptic density; and subplasmalemmal coating. Part of protein-containing complex. Is active in glutamatergic postsynaptic density and glutamatergic synapse. Biomarker of temporal lobe epilepsy. Orthologous to human CABP1 (calcium binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]