Rabbit Polyclonal Phospho-XIAP (S87) antibody (STJ90841)


Reactivity: Human, Mouse, Rat
Applications: WB, IHC, ELISA
Conjugation: Unconjugated
Supplier: St John’s Laboratory Ltd.

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Rabbit Polyclonal Phospho-XIAP (S87) antibody (STJ90841)

Supplier: St John’s Laboratory Ltd.

Recommended applications: WB, IHC, ELISA

Recommended dilution: WB 1:500-1:2000; IHC 1:100-1:300; ELISA 1:20000;

Recommended protocols: check protocols

Image descriptions:

Click or hover above images to see image description for XIAP (phospho Ser87) Polyclonal Antibody.

Alternative names:

Check alternative names for the antibody


XIAP antibody, API3 antibody, BIRC4 antibody, IAP3 antibody,|AP 13 antibody|API3 antibody|Apoptosis Inhibitor 3 antibody|Baculoviral IAP repeat containing 4 antibody|Baculoviral IAP Repeat Containing Protein 4 antibody|Baculoviral IAP repeat-containing protein 4 antibody|BIRC 4 antibody|BIRC4 antibody|E3 ubiquitin-protein ligase XIAP antibody|hIAP-3 antibody|hIAP3 antibody|HILP antibody|IAP 3 antibody|IAP like protein antibody|IAP-3 antibody|IAP-like protein antibody|IAP3 antibody|ILP 1 antibody|ILP antibody|ILP1 antibody|Inhibitor of apoptosis protein 3 antibody|Inhibitor of Apoptosis X Linked antibody|Mammalian IAP Homologue A antibody|MIHA antibody|X linked IAP antibody|X linked inhibitor of apoptosis antibody|X linked inhibitor of apoptosis E3 ubiquitin protein ligase antibody|X linked inhibitor of apoptosis protein antibody|X-linked IAP antibody|X-linked inhibitor of apoptosis protein antibody|Xiap antibody|XIAP_HUMAN antibody|XLP2 antibody|Anti-XIAP antibody (ab21278)
SCBT cat No: To be updated



XIAP (phospho Ser87) Polyclonal Antibody

Catalogue No.



Human, Mouse, Rat


Phospho-XIAP (S87) Polyclonal Antibody detects endogenous levels of XIAP protein only when phosphorylated at S87.


Synthesized phospho-peptide derived from XIAP (phospho Ser87) at AA range 30-110





Recommended dilution

WB 1:500-1:2000; IHC 1:100-1:300; ELISA 1:20000;







Molecular weight

57 kDa


XIAP (phospho Ser87) Antibody was tube-contained. Liquid in PBS containing 50% glycerol, 0.5% BSA and 0.02% sodium azide.


1 mg/ml


XIAP (phospho Ser87) Antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen.


-20 Celsius degree. Avoid repeated freeze/thaw cycles.

Alternative antibody names

E3 ubiquitin-protein ligase XIAP antibody, Baculoviral IAP repeat-containing protein 4 antibody, IAP-like protein antibody, ILP antibody, hILP antibody, Inhibitor of apoptosis protein 3 antibody, IAP-3 antibody, hIAP-3 antibody, hIAP3 antibody, X-linked inhibitor of apoptosis protein antibody, X-linked IAP antibody

Database links

Human UniProt/Swiss-Prot:P98170;Mouse UniPort/Swiss-Prot: Q60989;Rat UniProt/Swiss-Port: Q9R0I6;Human Entrez Gene: 331;Mouse Entrez Gene: 11798;Rat Entrez Gene: Rn.91239

Protein names

E3 ubiquitin-protein ligase XIAP , Baculoviral IAP repeat-containing protein 4 , IAP-like protein , ILP , hILP , Inhibitor of apoptosis protein 3 , IAP-3 , hIAP-3 , hIAP3 , X-linked inhibitor of apoptosis protein , X-linked IAP

Protein function

Multi-functional protein which regulates not only caspases and apoptosis, but also modulates inflammatory signaling and immunity, copper homeostasis, mitogenic kinase signaling, cell proliferation, as well as cell invasion and metastasis. Acts as a direct caspase inhibitor. Directly bind to the active site pocket of CASP3 and CASP7 and obstructs substrate entry. Inactivates CASP9 by keeping it in a monomeric, inactive state. Acts as an E3 ubiquitin-protein ligase regulating NF-kappa-B signaling and the target proteins for its E3 ubiquitin-protein ligase activity include: RIPK1, CASP3, CASP7, CASP8, CASP9, MAP3K2/MEKK2, DIABLO/SMAC, AIFM1, CCS and BIRC5/survivin. Ubiquitinion of CCS leads to enhancement of its chaperone activity toward its physiologic target, SOD1, rather than proteasomal degradation. Ubiquitinion of MAP3K2/MEKK2 and AIFM1 does not lead to proteasomal degradation. Plays a role in copper homeostasis by ubiquitinationg COMMD1 and promoting its proteasomal degradation. Can also function as E3 ubiquitin-protein ligase of the NEDD8 conjugation pathway, targeting effector caspases for neddylation and inactivation. Regulates the BMP signaling pathway and the SMAD and MAP3K7/TAK1 dependent pathways leading to NF-kappa-B and JNK activation. Acts as an important regulator of innate immune signaling via regulation of Nodlike receptors (NLRs). Protects cells from spontaneous formation of the ripoptosome, a large multi-protein complex that has the capability to kill cancer cells in a caspase-dependent and caspase-independent manner. Suppresses ripoptosome formation by ubiquitinating RIPK1 and CASP8. Acts as a positive regulator of Wnt signaling and ubiquitinates TLE1, TLE2, TLE3, TLE4 and AES. Ubiquitination of TLE3 results in inhibition of its interaction with TCF7L2/TCF4 thereby allowing efficient recruitment and binding of the transcriptional coactivator beta-catenin to TCF7L2/TCF4 that is required to initiate a Wnt-specific transcriptional program.

Protein tissue specificity

Ubiquitous, except peripheral blood leukocytes.

Involvement in disease

Lymphoproliferative syndrome, X-linked, 2 (XLP2) [MIM:300635]: 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. . Note: The disease is caused by mutations affecting the gene represented in this entry.

Protein sequence and domain

The first BIR domain is involved in interaction with TAB1/MAP3K7IP1 and is important for dimerization. The second BIR domain is sufficient to inhibit CASP3 and CASP7, while the third BIR is involved in CASP9 inhibition. The interactions with DIABLO/SMAC and PRSS25 are mediated by the second and third BIR domains. / Belongs to the IAP family. / Contains 3 BIR repeats. / Contains 1 RING-type zinc finger.

Protein post-translational modifications

S-Nitrosylation down-regulates its E3 ubiquitin-protein ligase activity. / Autoubiquitinated and degraded by the proteasome in apoptotic cells. / Phosphorylation by PKB/AKT protects XIAP against ubiquitination and protects the protein against proteasomal degradation.

Protein cellular localization

Cytoplasm / Nucleus

Research area

All research areas>Tumor Suppressor/Apoptosis>XIAP
(View all antibody categories related to Tumor Suppressor/Apoptosis)


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St John’s Laboratory Ltd.

Product type

Primary antibody


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