Active human IKB alpha (phospho Y42) peptide (ab42716)



  • NatureSynthetic
  • Amino Acid Sequence
    • SpeciesHuman
    • Modificationsphospho Y42

Associated products


Our Abpromise guarantee covers the use of ab42716 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Biological activityThe peptide is specifically recognized by IkBa (Tyr-42) phospho-specific antibody (ab24783) in ELISA, and has been shown to block the reactivity of ab24783 during Western blot. In addition, the peptide is recommended for use in blocking ab24783 reactivity in immunocytochemistry.
  • Applications

    Blocking - Blocking peptide for Anti-IKB alpha (phospho Y42) antibody (ab24783)


  • Purity> 90 % SDS-PAGE.

  • FormLiquid
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot and store at -20°C. Avoid freeze / thaw cycles.

    Preservative: 0.05% Sodium Azide
    Constituents: PBS

    This product is an active protein and may elicit a biological response in vivo, handle with caution.

General Info

  • Alternative names
    • I kappa B alpha
    • I-kappa-B-alpha
    • IkappaBalpha
    • IkB-alpha
    • IKBA
    • IKBalpha
    • MAD 3
    • MAD3
    • Major histocompatibility complex enhancer-binding protein MAD3
    • NF kappa B inhibitor alpha
    • NF-kappa-B inhibitor alpha
    • NFKBI
    • NFKBIA
    • Nuclear factor of kappa light chain gene enhancer in B cells
    • Nuclear factor of kappa light polypeptide gene enhancer in B cells inhibitor alpha
    see all
  • FunctionInhibits the activity of dimeric NF-kappa-B/REL complexes by trapping REL dimers in the cytoplasm through masking of their nuclear localization signals. On cellular stimulation by immune and proinflammatory responses, becomes phosphorylated promoting ubiquitination and degradation, enabling the dimeric RELA to translocate to the nucleus and activate transcription.
  • Involvement in diseaseEctodermal dysplasia, anhidrotic, with T-cell immunodeficiency autosomal dominant
  • Sequence similaritiesBelongs to the NF-kappa-B inhibitor family.
    Contains 5 ANK repeats.
  • Post-translational
    Phosphorylated; disables inhibition of NF-kappa-B DNA-binding activity. Phosphorylation at positions 32 and 36 is prerequisite to recognition by UBE2D3 leading to polyubiquitination and subsequent degradation.
    Sumoylated; sumoylation requires the presence of the nuclear import signal. Sumoylation blocks ubiquitination and proteasome-mediated degradation of the protein thereby increasing the protein stability.
    Monoubiquitinated at Lys-21 and/or Lys-22 by UBE2D3. Ubiquitin chain elongation is then performed by CDC34 in cooperation with the SCF(FBXW11) E3 ligase complex, building ubiquitin chains from the UBE2D3-primed NFKBIA-linked ubiquitin. The resulting polyubiquitination leads to protein degradation. Also ubiquitinated by SCF(BTRC) following stimulus-dependent phosphorylation at Ser-32 and Ser-36.
    Deubiquitinated by porcine reproductive and respiratory syndrome virus Nsp2 protein, which thereby interferes with NFKBIA degradation and impairs subsequent NF-kappa-B activation.
  • Cellular localizationCytoplasm. Nucleus. Shuttles between the nucleus and the cytoplasm by a nuclear localization signal (NLS) and a CRM1-dependent nuclear export.
  • Information by UniProt

References for Active human IKB alpha (phospho Y42) peptide (ab42716)

ab42716 has not yet been referenced specifically in any publications.

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