ADRA2A: Alpha-2 adrenergic receptors mediate the catecholamine- induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is oxymetazoline > clonidine > epinephrine > norepinephrine > phenylephrine > dopamine > p-synephrine > p-tyramine > serotonin = p-octopamine. For antagonists, the rank order is yohimbine > phentolamine = mianserine > chlorpromazine = spiperone = prazosin > propanolol > alprenolol = pindolol. Belongs to the G-protein coupled receptor 1 family. Adrenergic receptor subfamily. ADRA2A sub-subfamily.
Protein type: GPCR, family 1; Membrane protein, integral; Membrane protein, multi-pass; Receptor, GPCR
Chromosomal Location of Human Ortholog: 10q25.2
Cellular Component: basolateral plasma membrane; cytoplasm; integral to plasma membrane; plasma membrane; receptor complex
Molecular Function: alpha-1B adrenergic receptor binding; alpha-2C adrenergic receptor binding; alpha2-adrenergic receptor activity; epinephrine binding; heterotrimeric G-protein binding; norepinephrine binding; protein binding; protein heterodimerization activity; protein homodimerization activity; protein kinase binding; thioesterase binding
Biological Process: actin cytoskeleton organization and biogenesis; activation of protein kinase activity; activation of protein kinase B; cell motility; cellular response to hormone stimulus; G-protein coupled receptor protein signaling pathway; glucose homeostasis; intestinal absorption; negative regulation of adenylate cyclase activity; negative regulation of calcium ion transport; negative regulation of calcium ion-dependent exocytosis; negative regulation of cAMP biosynthetic process; negative regulation of insulin secretion; negative regulation of lipid catabolic process; positive regulation of cell migration; positive regulation of cell proliferation; positive regulation of cytokine production; positive regulation of epidermal growth factor receptor activity; positive regulation of MAP kinase activity; positive regulation of membrane protein ectodomain proteolysis; positive regulation of potassium ion transport; Ras protein signal transduction; regulation of insulin secretion; Rho protein signal transduction; signal transduction
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