Required for perception of chronic pain through NMDA receptor signaling. Regulates surface expression of NMDA receptors in dorsal horn neurons of the spinal cord. Interacts with the cytoplasmic tail of NMDA receptor subunits as well as inward rectifying potassium channels. Involved in regulation of synaptic stability at cholinergic synapses. Part of the postsynaptic protein scaffold of excitatory synapses. Interacts through its PDZ domains with NETO1. Interacts with NOS1/nNOS through second PDZ domain. Interacts with KCNJ2/Kir2.1 (via C-terminus) through one of its PDZ domains. Interacts with FRMPD4 (via C-terminus). Interacts with LRFN1, LRFN2 and LRFN4. Interacts with FASLG. Belongs to the MAGUK family. 4 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Alt. Names/Synonyms: Channel-associated protein of synapse-110; channel-associated protein of synapses, 110kDa; Chapsyn-110; discs, large homolog 2 (Drosophila); discs, large homolog 2, chapsyn-110; Disks large homolog 2; DKFZp781D1854; DKFZp781E0954; DLG2; FLJ37266; MGC131811; Postsynaptic density protein PSD-93; PSD-93; PSD93