Guanine nucleotide-binding protein G(q) subunit alpha is a protein that in humans is encoded by the GNAQgene.[1] Together with GNA11 (its paralogue), it functions as a Gq alpha subunit.[2]
Guanine nucleotide-binding proteins are a family of heterotrimeric proteins that couple cell surface, 7-transmembrane domain receptors to intracellular signaling pathways. Receptor activation catalyzes the exchange of GDP for GTP bound to the inactive G protein alpha subunit resulting in a conformational change and dissociation of the complex. The G protein alpha and beta-gamma subunits are capable of regulating various cellular effectors. Activation is terminated by a GTPase intrinsic to the G-alpha subunit. G-alpha-q is the alpha subunit of one of the heterotrimeric GTP-binding proteins that mediates stimulation of phospholipase C-beta (MIM 600230).[supplied by OMIM][3]
↑Dong Q, Shenker A, Way J, Haddad BR, Lin K, Hughes MR, McBride OW, Spiegel AM, Battey J (February 1997). "Molecular cloning of human G alpha q cDNA and chromosomal localization of the G alpha q gene (GNAQ) and a processed pseudogene". Genomics. 30 (3): 470–75. doi:10.1006/geno.1995.1267. PMID8825633.
↑Day PW, Carman CV, Sterne-Marr R, Benovic JL, Wedegaertner PB (August 2003). "Differential interaction of GRK2 with members of the G alpha q family". Biochemistry. 42 (30): 9176–84. doi:10.1021/bi034442+. PMID12885252.
↑Druey KM, Sullivan BM, Brown D, Fischer ER, Watson N, Blumer KJ, Gerfen CR, Scheschonka A, Kehrl JH (July 1998). "Expression of GTPase-deficient Gialpha2 results in translocation of cytoplasmic RGS4 to the plasma membrane". J. Biol. Chem. 273 (29): 18405–10. doi:10.1074/jbc.273.29.18405. PMID9660808.
↑Klattenhoff C, Montecino M, Soto X, Guzmán L, Romo X, García MA, Mellstrom B, Naranjo JR, Hinrichs MV, Olate J (May 2003). "Human brain synembryn interacts with Gsalpha and Gqalpha and is translocated to the plasma membrane in response to isoproterenol and carbachol". J. Cell. Physiol. 195 (2): 151–7. doi:10.1002/jcp.10300. PMID12652642.
↑Tall GG, Krumins AM, Gilman AG (March 2003). "Mammalian Ric-8A (synembryn) is a heterotrimeric Galpha protein guanine nucleotide exchange factor". J. Biol. Chem. 278 (10): 8356–62. doi:10.1074/jbc.M211862200. PMID12509430.
↑Rochdi MD, Watier V, La Madeleine C, Nakata H, Kozasa T, Parent JL (October 2002). "Regulation of GTP-binding protein alpha q (Galpha q) signaling by the ezrin-radixin-moesin-binding phosphoprotein-50 (EBP50)". J. Biol. Chem. 277 (43): 40751–9. doi:10.1074/jbc.M207910200. PMID12193606.
Further reading
Raymond JR, Mukhin YV, Gelasco A, Turner J, Collinsworth G, Gettys TW, Grewal JS, Garnovskaya MN (2002). "Multiplicity of mechanisms of serotonin receptor signal transduction". Pharmacol. Ther. 92 (2–3): 179–212. doi:10.1016/S0163-7258(01)00169-3. PMID11916537.
Van Oekelen D, Luyten WH, Leysen JE (2003). "5-HT2A and 5-HT2C receptors and their atypical regulation properties". Life Sci. 72 (22): 2429–49. doi:10.1016/S0024-3205(03)00141-3. PMID12650852.
Lesch KP, Manji HK (1992). "Signal-transducing G proteins and antidepressant drugs: evidence for modulation of alpha subunit gene expression in rat brain". Biol. Psychiatry. 32 (7): 549–79. doi:10.1016/0006-3223(92)90070-G. PMID1333286.
Blin N, Yun J, Wess J (1995). "Mapping of single amino acid residues required for selective activation of Gq/11 by the m3 muscarinic acetylcholine receptor". J. Biol. Chem. 270 (30): 17741–8. doi:10.1074/jbc.270.30.17741. PMID7629074.
Kabouridis PS, Waters ST, Escobar S, Stanners J, Tsoukas CD (1995). "Expression of GTP-binding protein alpha subunits in human thymocytes". Mol. Cell. Biochem. 144 (1): 45–51. doi:10.1007/BF00926739. PMID7791744.
Allgeier A, Offermanns S, Van Sande J, Spicher K, Schultz G, Dumont JE (1994). "The human thyrotropin receptor activates G-proteins Gs and Gq/11". J. Biol. Chem. 269 (19): 13733–5. PMID8188646.
Wedegaertner PB, Chu DH, Wilson PT, Levis MJ, Bourne HR (1993). "Palmitoylation is required for signaling functions and membrane attachment of Gq alpha and Gs alpha". J. Biol. Chem. 268 (33): 25001–8. PMID8227063.
Europe-Finner GN, Phaneuf S, Watson SP, López Bernal A (1993). "Identification and expression of G-proteins in human myometrium: up-regulation of G alpha s in pregnancy". Endocrinology. 132 (6): 2484–90. doi:10.1210/en.132.6.2484. PMID8504751.
Gomeza J, Mary S, Brabet I, Parmentier ML, Restituito S, Bockaert J, Pin JP (1996). "Coupling of metabotropic glutamate receptors 2 and 4 to G alpha 15, G alpha 16, and chimeric G alpha q/i proteins: characterization of new antagonists". Mol. Pharmacol. 50 (4): 923–30. PMID8863838.
Petit A, Geoffroy P, Bélisle S (1997). "Expression of angiotensin II type-I receptor and phospholipase C-linked G alpha q/11 protein in the human placenta". J. Soc. Gynecol. Investig. 3 (6): 316–21. doi:10.1016/S1071-5576(96)00035-4. PMID8923415.
Petit A, Geoffroy P, Bélisle S (1997). "Expression of G proteins in human placentas from pregnancies complicated by gestational hypertension". Life Sci. 60 (12): 953–60. doi:10.1016/S0024-3205(96)00654-6. PMID9061052.
Kinsella BT, O'Mahony DJ, Fitzgerald GA (1997). "The human thromboxane A2 receptor alpha isoform (TP alpha) functionally couples to the G proteins Gq and G11 in vivo and is activated by the isoprostane 8-epi prostaglandin F2 alpha". J. Pharmacol. Exp. Ther. 281 (2): 957–64. PMID9152406.
Wise A, Parenti M, Milligan G (1997). "Interaction of the G-protein G11alpha with receptors and phosphoinositidase C: the contribution of G-protein palmitoylation and membrane association". FEBS Lett. 407 (3): 257–60. doi:10.1016/S0014-5793(97)00300-1. PMID9175863.
