• NatureRecombinant
  • SourceBaculovirus
  • Amino Acid Sequence
    • AccessionP98170
    • SpeciesHuman
    • Molecular weight57 kDa including tags
    • Amino acids2 to 497
    • TagsDDDDK tag N-Terminus


Our Abpromise guarantee covers the use of ab95933 in the following tested applications.

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

  • Biological activitySpecific Activity: 0.0015 pmol/min/µg Assay conditions: 4 mM ATP, 5mM MgCl2 (both required for reaction), 1mM DTT, E1 (0.5 µg), E2 (2.8 µg), Biotinylated Ubiquitin (1 µg) in 50mM Tris pH 7.4.
  • Applications

    Functional Studies


    Western blot

  • Purity 65 % .
    Purity is >65% by SDS-PAGE.
  • FormLiquid
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped on Dry Ice. Store at -80°C.

    pH: 8.00
    Constituents: 20% Glycerol, 0.58% Sodium chloride, 0.395% Tris HCl, 0.05% Tween, 0.0462% DTT
    Note: 104 µg/ml FLAG peptide

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

General Info

  • Alternative names
    • AP 13
    • API3
    • Apoptosis Inhibitor 3
    • Baculoviral IAP repeat containing 4
    • Baculoviral IAP Repeat Containing Protein 4
    • Baculoviral IAP repeat-containing protein 4
    • BIRC 4
    • BIRC4
    • E3 ubiquitin-protein ligase XIAP
    • hIAP-3
    • hIAP3
    • HILP
    • IAP 3
    • IAP like protein
    • IAP-3
    • IAP-like protein
    • IAP3
    • ILP
    • ILP 1
    • ILP1
    • Inhibitor of apoptosis protein 3
    • Inhibitor of Apoptosis X Linked
    • Mammalian IAP Homologue A
    • MIHA
    • X linked IAP
    • X linked inhibitor of apoptosis
    • X linked inhibitor of apoptosis E3 ubiquitin protein ligase
    • X linked inhibitor of apoptosis protein
    • X-linked IAP
    • X-linked inhibitor of apoptosis protein
    • Xiap
    • XLP2
    see all
  • FunctionApoptotic suppressor. Has E3 ubiquitin-protein ligase activity. Mediates the proteasomal degradation of target proteins, such as caspase-3, SMAC or AIFM1. Inhibitor of caspase-3, -7 and -9. Mediates activation of MAP3K7/TAK1, leading to the activation of NF-kappa-B.
  • Tissue specificityUbiquitous, except peripheral blood leukocytes.
  • Involvement in diseaseDefects in XIAP are the cause of lymphoproliferative syndrome X-linked type 2 (XLP2) [MIM:300635]. XLP is a rare immunodeficiency characterized by extreme susceptibility to infection with Epstein-Barr virus (EBV). Symptoms include severe or fatal mononucleosis, acquired hypogammaglobulinemia, pancytopenia and malignant lymphoma.
  • Sequence similaritiesBelongs to the IAP family.
    Contains 3 BIR repeats.
    Contains 1 RING-type zinc finger.
  • DomainThe first BIR domain is involved in interaction with TAB1/MAP3K7IP1 and is important for dimerization. The second BIR domain is sufficient to inhibit caspase-3 and caspase-7, while the third BIR is involved in caspase-9 inhibition. The interactions with SMAC and PRSS25 are mediated by the second and third BIR domains.
  • Post-translational
    Ubiquitinated and degraded by the proteasome in apoptotic cells.
    Phosphorylation by PKB/AKT protects XIAP against ubiquitination and protects the protein against proteasomal degradation.
  • Cellular localizationCytoplasm.
  • Information by UniProt

Recombinant human XIAP protein images

  • Image showing specific activity of ab95933.
  • SDS-PAGE showing ab95933 at approximately 57kDa (5µg).

References for Recombinant human XIAP protein (ab95933)

ab95933 has not yet been referenced specifically in any publications.

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