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Checkpoint Kinase 2 (CHEK2) (pSer516) antibody

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Synonyms CHK-2, CDS1, CHK2, HuCds1, LFS2, PP1425, RAD53, hCds1, Cds1, HUCDS1, Rad53, Chk2, fa66f08, wu:fa66f08, zgc:55865
(49), (43), (40), (33), (24), (15), (13), (13), (12), (11), (10), (9), (7), (7), (6), (5), (4), (4), (3), (3), (3), (3), (3), (3), (3), (3), (3), (3), (3), (2), (2), (2), (2), (2), (2), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1), (1)
(419), (160), (160), (8), (8), (6), (5), (4), (1), (1), (1)
(335), (89), (8), (1), (1)
(7), (7), (6), (6), (5), (5), (5), (5), (5), (5), (5), (5), (1), (1), (1), (1), (1)
Western Blotting (WB)
(341), (115), (107), (70), (67), (57), (37), (29), (24), (6), (5), (2), (1)
Pubmed 3 references available
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Quantity 0.1 mL
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Immunogen The antiserum was produced against synthesized phosphopeptide derived from human Chk2 around the phosphorylation site of serine 516 (Q-P-SP-T-S).
Specificity The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific phosphopeptide. The antibody against non-phosphopeptide was removed by chromatogramphy using non-phosphopeptide corresponding to the phosphorylation site. Chk2 (phospho-Ser516) antibody detects endogenous levels of Chk2 only when phosphorylated at serine 516.
Purification Immunoaffinity chromatography.
Alternative Name CHK2 (CHEK2 Antibody Abstract)
Background Chk2 is a serine/threonine kinase involved in the control of cell cycle checkpoints, and may also participate in transduction of the DNA damage and replicational stress signals. Chk2 is the mammalian ortholog of the budding yeast Rad53 and fission yeast Cds1 checkpoint kinases. The amino-terminal domain of Chk2 contains a series of seven serine and threonine residues (Ser19, Thr26, Ser28, Ser33, Ser35, Ser50 and Thr68) followed by glutamine (SQ or TQ motif). These are known to be preferred sites for phosphorylation by ATM/ATR kinases. Indeed, after DNA damage by ionizing radiation (IR), UV irradiation or hydroxyurea treatment, Thr68 and other sites in this region become phosphorylated by ATM/ATR. The SQ/TQ cluster domain, therefore, seems to have a regulatory function. Phosphorylation at Thr68 is a prerequisite for the subsequent activation step, which is attributable to autophosphorylation of Chk2 on residues Thr383 and Thr387 in the activation loop of the kinase domain. Chk2 inhibits CDC25C phosphatase by phosphorylating it on Ser-216, preventing the entry into mitosis. This kinase may have a role in meiosis as well. Kinase activity is up regulated by autophosphorylation and the protein is rapidly phosphorylated in response to DNA damage and to replication block. Defects in Chk2 are associated with Li-Fraumeni syndrome (LFS), a highly penetrant familial cancer phenotype usually associated with inherited mutations in p53/TP53. Defects in Chk2 are also found in some patients with prostate cancer (CaP) or osteosarcoma (OSRC). Substantial amino acid variants exist in some cancer tissues. Numerous truncated splice variants exist for this protein.Synonyms: CHEK-2, CHEK2, CHK-2, CHK2 checkpoint homolog, Cds1, RAD53, Serine/threonine-protein kinase Chk2
Gene ID 11200
NCBI Accession NP_001005735
UniProt O96017
Pathways p53 Signaling, Apoptosis, Cell Division Cycle
Application Notes Suitable for use in Western blot (1: 500approx. 1: 1000).
Other applications not tested.
Optimal dilutions are dependent on conditions and should be determined by the user.
Restrictions For Research Use only
Concentration 1.0 mg/mL
Buffer PBS (without Mg2+ and Ca2+), pH 7.4, 150 mM NaCl, 0.02 % Sodium Azide and 50 % Glycerol.
Preservative Sodium azide
Precaution of Use This product contains sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
Handling Advice Avoid repeated freezing and thawing.
Storage -20 °C
Storage Comment Store the antibody (in aliquots) at -20 °C.
Supplier Images
 image for anti-Checkpoint Kinase 2 (CHEK2) (pSer516) antibody (ABIN196866) anti-Checkpoint Kinase 2 (CHEK2) (pSer516) antibody
Background publications Wu, Chen: "Autophosphorylation of checkpoint kinase 2 at serine 516 is required for radiation-induced apoptosis." in: The Journal of biological chemistry, Vol. 278, Issue 38, pp. 36163-8, 2003 (PubMed).

Schwarz, Lovly, Piwnica-Worms: "Regulation of the Chk2 protein kinase by oligomerization-mediated cis- and trans-phosphorylation." in: Molecular cancer research : MCR, Vol. 1, Issue 8, pp. 598-609, 2003 (PubMed).

Lou, Minter-Dykhouse, Wu et al.: "MDC1 is coupled to activated CHK2 in mammalian DNA damage response pathways." in: Nature, Vol. 421, Issue 6926, pp. 957-61, 2003 (PubMed).

Catalog No. ABIN196866
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