Beta Arrestin-1 (ARRB1) Antibody – Rabbit Polyclonal

ARRB1: regulates G-protein coupled receptors (GPCR) signaling by mediating both receptor desensitization and resensitization processes. Binds to GRK-phosphorylated receptor and sterically preclude its coupling to the cognate G- protein; the binding appears to require receptor determinants exposed only in the active receptor conformation. Targets many receptors for internalization by acting as endocytic adapters (CLASPs, clathrin-associated sorting proteins). Internalized arrestin-receptor complexes traffic to intracellular endosomes, where they remain uncoupled from G-proteins. Two different modes of arrestin-mediated internalization occur. Beta-arrestins function as multivalent adapter proteins that can switch the GPCR from a G-protein signaling mode that transmits short-lived signals from the plasma membrane via small molecule second messengers and ion channels to a beta-arrestin signaling mode that transmits a distinct set of signals that are initiated as the receptor internalizes and transits the intracellular compartment. Also involved in regulation of receptors other than GPCRs. Involved in Toll-like receptor and IL-1 receptor signaling through the interaction with TRAF6 which prevents TRAF6 autoubiquitination and oligomerization required for activation of NF-kappa-B and JUN. Binds phosphoinositides. Binds inositolhexakisphosphate (InsP6). Involved in IL8-mediated granule release in neutrophils. Interacts with phosphorylated ADRB2 and CHRM2. Interacts with SRC (via the SH3 domain and the protein kinase domain); the interaction is independent of the phosphorylation state of SRC C-terminus. Interacts with RAF1, CHUK, IKBKB and Nik. Interacts with DVL1 and DVL2; the interaction is enhanced by DVL phosphorylation. Interacts with IGF1R. Belongs to the arrestin family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Adaptor/scaffold

Cellular Component: basolateral plasma membrane; cytoplasmic membrane-bound vesicle; postsynaptic density; dendritic spine; coated pit; pseudopodium; cytosol; nucleoplasm; postsynaptic membrane; cytoplasm; plasma membrane; intracellular; cytoplasmic vesicle; chromatin; nucleus

Molecular Function: angiotensin receptor binding; protein phosphorylated amino acid binding; clathrin binding; follicle stimulating hormone receptor binding; mitogen-activated protein kinase kinase binding; caspase inhibitor activity; phosphoprotein binding; alpha-1B adrenergic receptor binding; transcription factor binding; GTPase activator activity; alpha-1A adrenergic receptor binding; V2 vasopressin receptor binding; insulin-like growth factor receptor binding; protein binding; histone acetyltransferase activity; G-protein-coupled receptor binding; ubiquitin protein ligase binding; estrogen receptor binding

Biological Process: transcription from RNA polymerase II promoter; proteasomal ubiquitin-dependent protein catabolic process; follicle-stimulating hormone signaling pathway; positive regulation of protein binding; activation of MAPK activity; positive regulation of receptor internalization; positive regulation of caspase activity; protein ubiquitination; negative regulation of caspase activity; sensory perception of pain; protein transport; negative regulation of protein amino acid phosphorylation; sensory perception of touch; phototransduction; negative regulation of interleukin-8 production; negative regulation of interleukin-6 production; regulation of cAMP biosynthetic process; arrestin mediated desensitization of G-protein coupled receptor protein signaling pathway; receptor-mediated endocytosis; positive regulation of Rho protein signal transduction; regulation of cAMP catabolic process; endocytosis; positive regulation of peptidyl-serine phosphorylation; G-protein signaling, coupled to cAMP nucleotide second messenger; G-protein coupled receptor protein signaling pathway; G-protein coupled receptor internalization; positive regulation of protein ubiquitination; inhibition of NF-kappaB transcription factor; stress fiber formation; positive regulation of transcription from RNA polymerase II promoter; positive regulation of histone acetylation; negative regulation of protein ubiquitination; positive regulation of protein amino acid phosphorylation; regulation of G-protein coupled receptor protein signaling pathway; positive regulation of GTPase activity