ADRA1A Antibody – Rabbit Polyclonal

Alpha-1-adrenergic receptors (alpha-1-ARs) are members of the G protein-coupled receptor superfamily. They activate mitogenic responses and regulate growth and proliferation of many cells. There are 3 alpha-1-AR subtypes: alpha-1A, -1B and -1D, all of which signal through the Gq/11 family of G-proteins and different subtypes show different patterns of activation. This gene encodes alpha-1A-adrenergic receptor. Alternative splicing of this gene generates four transcript variants, which encode four different isoforms with distinct C-termini but having similar ligand binding properties. [provided by RefSeq, Jul 2008]

ADRA1A: This alpha-adrenergic receptor mediates its action by association with G proteins that activate a phosphatidylinositol- calcium second messenger system. Its effect is mediated by G(q) and G(11) proteins. Nuclear ADRA1A-ADRA1B heterooligomers regulate phenylephrine(PE)-stimulated ERK signaling in cardiac myocytes. Belongs to the G-protein coupled receptor 1 family. Adrenergic receptor subfamily. ADRA1A sub-subfamily. 9 isoforms of the human protein are produced by alternative splicing.

Protein type: Membrane protein, multi-pass; Receptor, GPCR; GPCR, family 1; Membrane protein, integral

Chromosomal Location of Human Ortholog: 8p21.2

Cellular Component: nuclear membrane; integral to plasma membrane; T-tubule; plasma membrane; Z disc; nucleus

Molecular Function: protein heterodimerization activity; alpha1-adrenergic receptor activity

Biological Process: apoptosis; response to hormone stimulus; positive regulation of systemic arterial blood pressure; norepinephrine-epinephrine vasoconstriction involved in regulation of systemic arterial blood pressure; signal transduction; negative regulation of cell proliferation; elevation of cytosolic calcium ion concentration; smooth muscle contraction; positive regulation of MAPKKK cascade; cell-cell signaling; positive regulation of smooth muscle contraction; positive regulation of action potential; cell growth; aging; adult heart development; response to drug; positive regulation of the force of heart contraction by epinephrine-norepinephrine; positive regulation of synaptic transmission, GABAergic; micturition; negative regulation of heart rate in baroreceptor response to increased systemic arterial blood pressure; organ growth; G-protein coupled receptor protein signaling pathway; negative regulation of Rho protein signal transduction; phospholipase C activation; positive regulation of vasoconstriction; G-protein signaling, coupled to IP3 second messenger (phospholipase C activating); positive regulation of heart rate by epinephrine-norepinephrine