Render Target: SSR
Render Timestamp: 2024-12-26T19:24:36.204Z
Commit: f2d32940205a64f990b886d724ccee2c9935daff
XML generation date: 2024-08-01 15:27:24.208
Product last modified at: 2024-10-16T18:00:10.475Z
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PDP - Template Name: Polyclonal Antibody
PDP - Template ID: *******59c6464

Phospho-A20/TNFAIP3 (Ser381) Antibody #63523

Filter:
  • WB
  • IP

    Supporting Data

    REACTIVITY H
    SENSITIVITY Endogenous
    MW (kDa) 92
    SOURCE Rabbit
    Application Key:
    • WB-Western Blotting 
    • IP-Immunoprecipitation 
    Species Cross-Reactivity Key:
    • H-Human 

    Product Information

    Product Usage Information

    Application Dilution
    Western Blotting 1:1000
    Immunoprecipitation 1:50

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C. Do not aliquot the antibody.

    Protocol

    Specificity / Sensitivity

    Phospho-A20/TNFAIP3 (Ser381) Antibody recognizes endogenous levels of A20/TNFAIP3 protein only when phosphorylated at Ser381.

    Species Reactivity:

    Human

    Source / Purification

    Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser381 of human A20/TNFAIP3 protein. Antibodies are purified by protein A and peptide affinity chromatography.

    Background

    A20, also referred to as TNF-α-induced protein 3 (TNFAIP3), is cytokine-inducible protein that functions to inhibit apoptosis and activate NF-κB (1,2). It was first identified as a TNF-α inducible primary response gene in human umbilical vein endothelial cells, and encodes a 790-amino acid protein containing seven Cys2/Cys2-zinc finger motifs (3). Constitutive expression of A20 is observed in lymphoid tissues (4), but it is transiently expressed in a variety of cell types in response to inflammatory signals such as TNF-α (3,5), IL-1 (3,5), phorbol esters (6), and LPS (7). Expression of A20 can confer resistance to apoptosis and NF-κB activation triggered by these signals, probably through interference with TRAF (TNF receptor associated factor) family members (8,9), and interaction with the NF-κB inhibiting protein ABIN (10). Studies also show that A20 contains site-specific ubiquitin modifying activity that can contribute to its biological functions (11,12). The amino-terminus of A20 contains de-ubiquitinating (DUB) activity for Lys63 branches, such as those found in TRAF6 and RIP, while the carboxyl-terminus contains ubiquitin ligase (E3) activity for Lys48 branches of the same substrates and leads to their degradation (12).
    A20 gets phosphorylated at Ser381 by IKKβ downstream of various innate immune activators, which enhances the deubiquitnase activiaty of A20 leading to disassembly of inflammatory signaling complexes (13). Therefore, A20 works as part of a negative feedback loop to limit NF-κB activation and inflammatory signaling (13). Phosphorylation at Ser381 could be used as a marker of active A20.
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