Neuronal cell surface protein thought to be involved in cell-cell-interactions by forming intercellular junctions through binding to beta-neurexins. Seems to play role in formation or maintenance of synaptic junctions. In vitro, triggers the de novo formation of presynaptic structures. May be involved in specification of excitatory synapses.
Expressed in the blood vessel walls (at protein level).
Belongs to the type-B carboxylesterase/lipase family.
Cell membrane. Cell junction > synapse. Cell junction > synapse > postsynaptic cell membrane > postsynaptic density. Enriched in synaptic plasma membranes and clustered in synaptic clefts and postsynaptic densities.