GIPC PDZ domain containing family, member 1 (GIPC1) is a protein that in humans is encoded by the GIPC1 gene.[5][6][7] GIPC was originally identified as it binds specifically to the C terminus of RGS-GAIP, a protein involved in the regulation of G protein signaling.[5] GIPC is an acronym for "GAIP Interacting Protein C-terminus". RGS proteins are "Regulators of G protein Signaling" and RGS-GAIP is a "GTPase Activator protein for Gαi/Gαq", which are two major subtypes of Gα proteins. The human GIPC1 molecule is 333 amino acids or about 36 kDa in molecular size and consists of a central PDZ domain, a compact protein module which mediates specific protein-protein interactions. The RGS-GAIP protein interacts with this domain and many other proteins interact here or at other parts of the GIPC1 molecule. As a result, GIPC1 was independently discovered by several other groups and has a variety of alternate names, including synectin, C19orf3, RGS19IP1 and others. The GIPC1 gene family in mammals consisting of three members, so the first discovered, originally named GIPC, is now generally called GIPC1, with the other two being named GIPC2 and GIPC3.[8] The three human proteins are about 60% identical in protein sequence. GIPC1 has been shown to interact with a variety of other receptor and cytoskeletal proteins including the GLUT1 receptor, ACTN1, KIF1B, MYO6, PLEKHG5, SDC4/syndecan-4, SEMA4C/semaphorin-4 and HTLV-I Tax. The general function of GIPC family proteins therefore appears to be mediating specific interactions between proteins involved in G protein signaling and membrane translocation.
- ^ a b c GRCh38: Ensembl release 89: ENSG00000123159 – Ensembl, May 2017
- ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000019433 – Ensembl, May 2017
- ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ a b De Vries L, Lou X, Zhao G, Zheng B, Farquhar MG (November 1998). "GIPC, a PDZ domain containing protein, interacts specifically with the C terminus of RGS-GAIP". Proc. Natl. Acad. Sci. U.S.A. 95 (21): 12340–5. Bibcode:1998PNAS...9512340D. doi:10.1073/pnas.95.21.12340. PMC 22833. PMID 9770488.
- ^ Rousset R, Fabre S, Desbois C, Bantignies F, Jalinot P (March 1998). "The C-terminus of the HTLV-1 Tax oncoprotein mediates interaction with the PDZ domain of cellular proteins". Oncogene. 16 (5): 643–54. doi:10.1038/sj.onc.1201567. PMID 9482110.
- ^ "Entrez Gene: GIPC1 GIPC PDZ domain containing family, member 1".
- ^ Katoh M (2002). "GIPC gene family (Review)". Int. J. Mol. Med. 9 (6): 585–9. doi:10.3892/ijmm.9.6.585. PMID 12011974.