PSD-93 Antibody – Rabbit Polyclonal

This gene encodes a member of the membrane-associated guanylate kinase (MAGUK) family. The encoded protein forms a heterodimer with a related family member that may interact at postsynaptic sites to form a multimeric scaffold for the clustering of receptors, ion channels, and associated signaling proteins. Multiple transcript variants encoding different isoforms have been found for this gene. Additional transcript variants have been described, but their full-length nature is not known. [provided by RefSeq, Dec 2008]

PSD-93: 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.

Protein type: Adaptor/scaffold

Chromosomal Location of Human Ortholog: 11q14.1

Cellular Component: postsynaptic membrane; voltage-gated potassium channel complex; membrane; basolateral plasma membrane; postsynaptic density; plasma membrane; ionotropic glutamate receptor complex; cell junction

Molecular Function: ionotropic glutamate receptor binding; guanylate kinase activity; protein binding

Biological Process: establishment and/or maintenance of epithelial cell polarity; synaptic transmission; nervous system development; sensory perception of pain; receptor clustering; nucleotide phosphorylation