Mouse Anti-ARRB1 Recombinant Antibody (7G45) (CBMAB-A3668-YC)

Mouse

Human, Mouse, Rat

7G45

IgG2a

WB

Arrestin Fusion Protein.

Human, Mouse, Rat

IgG2a

Monoclonal

The COA includes recommended starting dilutions, optimal dilutions should be determined by the end user.

Application	Note
WB	1:5,000

Liquid

PBS, pH 7.3, 50% glycerol

0.02% sodium azide

1 mg/ml

Store at 4°C short term (1-2 weeks). Aliquot and store at -20°C long term. Avoid repeated freeze/thaw cycles.

C-terminus

Arrestin Beta 1

Members of arrestin/beta-arrestin protein family are thought to participate in agonist-mediated desensitization of G-protein-coupled receptors and cause specific dampening of cellular responses to stimuli such as hormones, neurotransmitters, or sensory si

Arrestin Beta 1; Non-Visual Arrestin-2; Arrestin 2; ARR1; Arrestin, Beta 1; Beta-Arrestin-1; Arrestin Beta-1; ARB1;

Functions in regulating agonist-mediated G-protein coupled receptor (GPCR) signaling by mediating both receptor desensitization and resensitization processes. During homologous desensitization, beta-arrestins bind to the GPRK-phosphorylated receptor and sterically preclude its coupling to the cognate G-protein; the binding appears to require additional receptor determinants exposed only in the active receptor conformation. The beta-arrestins target many receptors for internalization by acting as endocytic adapters (CLASPs, clathrin-associated sorting proteins) and recruiting the GPRCs to the adapter protein 2 complex 2 (AP-2) in clathrin-coated pits (CCPs). However, the extent of beta-arrestin involvement appears to vary significantly depending on the receptor, agonist and cell type. Internalized arrestin-receptor complexes traffic to intracellular endosomes, where they remain uncoupled from G-proteins. Two different modes of arrestin-mediated internalization occur. Class A receptors, like ADRB2, OPRM1, ENDRA, D1AR and ADRA1B dissociate from beta-arrestin at or near the plasma membrane and undergo rapid recycling. Class B receptors, like AVPR2, AGTR1, NTSR1, TRHR and TACR1 internalize as a complex with arrestin and traffic with it to endosomal vesicles, presumably as desensitized receptors, for extended periods of time. Receptor resensitization then requires that receptor-bound arrestin is removed so that the receptor can be dephosphorylated and returned to the plasma membrane. Involved in internalization of P2RY4 and UTP-stimulated internalization of P2RY2. Involved in phosphorylation-dependent internalization of OPRD1 ands subsequent recycling. Involved in the degradation of cAMP by recruiting cAMP phosphodiesterases to ligand-activated receptors. 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. Acts as signaling scaffold for MAPK pathways such as MAPK1/3 (ERK1/2). ERK1/2 activated by the beta-arrestin scaffold is largely excluded from the nucleus and confined to cytoplasmic locations such as endocytic vesicles, also called beta-arrestin signalosomes. Recruits c-Src/SRC to ADRB2 resulting in ERK activation. GPCRs for which the beta-arrestin-mediated signaling relies on both ARRB1 and ARRB2 (codependent regulation) include ADRB2, F2RL1 and PTH1R. For some GPCRs the beta-arrestin-mediated signaling relies on either ARRB1 or ARRB2 and is inhibited by the other respective beta-arrestin form (reciprocal regulation). Inhibits ERK1/2 signaling in AGTR1- and AVPR2-mediated activation (reciprocal regulation). Is required for SP-stimulated endocytosis of NK1R and recruits c-Src/SRC to internalized NK1R resulting in ERK1/2 activation, which is required for the antiapoptotic effects of SP. Is involved in proteinase-activated F2RL1-mediated ERK activity. Acts as signaling scaffold for the AKT1 pathway. Is involved in alpha-thrombin-stimulated AKT1 signaling. Is involved in IGF1-stimulated AKT1 signaling leading to increased protection from apoptosis. Involved in activation of the p38 MAPK signaling pathway and in actin bundle formation. Involved in F2RL1-mediated cytoskeletal rearrangement and chemotaxis. Involved in AGTR1-mediated stress fiber formation by acting together with GNAQ to activate RHOA. Appears to function as signaling scaffold involved in regulation of MIP-1-beta-stimulated CCR5-dependent chemotaxis. Involved in attenuation of NF-kappa-B-dependent transcription in response to GPCR or cytokine stimulation by interacting with and stabilizing CHUK. May serve as nuclear messenger for GPCRs. Involved in OPRD1-stimulated transcriptional regulation by translocating to CDKN1B and FOS promoter regions and recruiting EP300 resulting in acetylation of histone H4. Involved in regulation of LEF1 transcriptional activity via interaction with DVL1 and/or DVL2 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) (By similarity).

Involved in IL8-mediated granule release in neutrophils. Required for atypical chemokine receptor ACKR2-induced RAC1-LIMK1-PAK1-dependent phosphorylation of cofilin (CFL1) and for the up-regulation of ACKR2 from endosomal compartment to cell membrane, increasing its efficiency in chemokine uptake and degradation. Involved in the internalization of the atypical chemokine receptor ACKR3. Negatively regulates the NOTCH signaling pathway by mediating the ubiquitination and degradation of NOTCH1 by ITCH. Participates in the recruitment of the ubiquitin-protein ligase to the receptor (PubMed:23886940).

Activation of MAPK activity Source: Ensembl
Follicle-stimulating hormone signaling pathway Source: Ensembl
G protein-coupled receptor internalization Source: UniProtKB
G protein-coupled receptor signaling pathway Source: Reactome
Histone acetylation Source: GOC
Membrane organization Source: Reactome
Negative regulation of ERK1 and ERK2 cascade Source: Ensembl
Negative regulation of GTPase activity Source: Ensembl
Negative regulation of interleukin-6 production Source: UniProtKB
Negative regulation of interleukin-8 production Source: UniProtKB
Negative regulation of neuron apoptotic process Source: Ensembl
Negative regulation of NF-kappaB transcription factor activity Source: UniProtKB
Negative regulation of Notch signaling pathway Source: UniProtKB
Negative regulation of protein phosphorylation Source: Ensembl
Negative regulation of protein ubiquitination Source: UniProtKB
Platelet activation Source: Reactome
Positive regulation of cell population proliferation Source: Ensembl
Positive regulation of cysteine-type endopeptidase activity involved in apoptotic process Source: Ensembl
Positive regulation of ERK1 and ERK2 cascade Source: UniProtKB
Positive regulation of histone acetylation Source: BHF-UCL
Positive regulation of histone H4 acetylation Source: UniProtKB
Positive regulation of protein phosphorylation Source: UniProtKB
Positive regulation of protein ubiquitination Source: Ensembl
Positive regulation of receptor internalization Source: UniProtKB
Positive regulation of Rho protein signal transduction Source: UniProtKB
Positive regulation of smooth muscle cell apoptotic process Source: Ensembl
Positive regulation of transcription by RNA polymerase II Source: BHF-UCL
Post-Golgi vesicle-mediated transport Source: Reactome
Proteasome-mediated ubiquitin-dependent protein catabolic process Source: UniProtKB
Protein transport Source: UniProtKB-KW
Protein ubiquitination Source: UniProtKB
Regulation of transcription by RNA polymerase II Source: UniProtKB
Response to drug Source: Ensembl
Stress fiber assembly Source: UniProtKB
Ubiquitin-dependent protein catabolic process Source: UniProtKB

Nucleus; Cell membrane; Cytoplasm; Clathrin-coated pit; Pseudopodium; Cytoplasmic vesicle. Translocates to the plasma membrane and colocalizes with antagonist-stimulated GPCRs. The monomeric form is predominantly located in the nucleus. The oligomeric form is located in the cytoplasm. Translocates to the nucleus upon stimulation of OPRD1 (By similarity).

Constitutively phosphorylated at Ser-412 in the cytoplasm. At the plasma membrane, is rapidly dephosphorylated, a process that is required for clathrin binding and ADRB2 endocytosis but not for ADRB2 binding and desensitization. Once internalized, is rephosphorylated.
The ubiquitination status appears to regulate the formation and trafficking of beta-arrestin-GPCR complexes and signaling. Ubiquitination appears to occur GPCR-specific. Ubiquitinated by MDM2; the ubiquitination is required for rapid internalization of ADRB2. Deubiquitinated by USP33; the deubiquitination leads to a dissociation of the beta-arrestin-GPCR complex. Stimulation of a class A GPCR, such as ADRB2, induces transient ubiquitination and subsequently promotes association with USP33.