GNAQ belong to the family of heterotrimeric Guanine nucleotide-binding proteins proteins that couple cell surface, 7-transmembrane domain receptors to intracellular signaling pathways. Receptor activation catalyzes the exchange of GTP for GDP bound to the inactive G protein alpha subunit resulting in a conformational change and dissociation of the complex. GNAQ is the alpha subunit of one of the heterotrimeric GTP-binding proteins that mediates stimulation of phospholipase SLCbeta. in recent studies over expression of GNAQ is associated with cardiomyocyte apoptosis.
Function: Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. Regulates B-cell selection and survival and is required to prevent B-cell-dependent autoimmunity. Regulates chemotaxis of BM-derived neutrophils and dendritic cells (in vitro) (By similarity).
Subunit: G proteins are composed of 3 units; alpha, beta and gamma. The alpha chain contains the guanine nucleotide binding site. Binds SLC9A3R1. Forms a complex with PECAM1 and BDKRB2. Interacts with PECAM1.
Subcellular Location: Nucleus (By similarity). Membrane (By similarity). Nucleus membrane (By similarity). Note=Colocalizes with the adrenergic receptors, ADREN1A and ADREN1B, at the nuclear membrane of cardiac myocytes (By similarity).
Tissue Specificity: Predominantly expressed in ovary, prostate, testis and colon.
Similarity: Belongs to the G-alpha family. G(q) subfamily.
