Checkpoint Kinase 1 (CHEK1) (Active) Protein

Details for Product No. ABIN457519, Supplier: Log in to see
Protein Name
  • An08g10320
  • AO090003000441
  • CHK1
  • chk1
  • C85740
  • Chk1
  • rad27
  • id:ibd2720
  • zgc:56093
  • CHEK1
  • checkpoint kinase 1
  • serine/threonine-protein kinase chk1
  • serine/threonine-protein kinase Chk1
  • CAMK/CAMKL/CHK1 protein kinase Chk1
  • checkpoint kinase 1 S homeolog
  • CHEK1
  • ANI_1_2436074
  • AOR_1_768154
  • PTRG_04183
  • SJAG_01680
  • PAAG_04978
  • MCYG_03290
  • VDBG_03742
  • chek1.S
  • Chek1
  • chek1
Baculovirus infected Insect Cells
Protein Type
Biological Activity
Functional Studies (Func), SDS-PAGE (SDS), Western Blotting (WB)
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Supplier Product No.
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Purpose >90% Pure active Recombinant CHK1.
Characteristics Protein Source: Baculovirus (Sf9 insect cells)
Purity SDS-PAGE: ≥90 %
Background CHK1 is a 56 kd serine/threonine protein kinase that was originally identified in fission yeast to play a role in activation of the DNA damage checkpoint in the G2 phase of the cell cycle (1). CHK1 appears to function downstream of several of the known fission yeast checkpoint gene products, including that encoded by rad3+, a gene with sequence similarity to the ATM gene mutated in patients with ataxia telangiectasia (2). In vitro, CHK1 binds to and phosphorylates the dual-specificity protein phosphatases Cdc25A, Cdc25B, and Cdc25C, which control cell cycle transitions by dephosphorylating cyclin-dependent kinases (3). CHK1 phosphorylates Cdc25C on serine-216 which creates a binding site for 14-3-3 protein and inhibits function of the phosphatase. Thus, in response to DNA damage, CHK1 phosphorylates and inhibits Cdc25C, thereby preventing the activation of the Cdc2-cyclin B complex and mitotic entry.
Alternate Names: CHK, Serine/threonine-protein kinase Chk1, CHK1 checkpoint homolog, Cell cycle checkpoint kinase, Checkpoint kinase-1
Molecular Weight 82.0 kDa
Gene ID 1111
UniProt O14757
Research Area Kinases/Phosphatases, Cell Cycle
Pathways p53 Signaling, Apoptosis, Cell Division Cycle
Application Notes Optimal working dilution should be determined by the investigator.

Activity Specification: 369 nmol phosphate incorporated into CHKtide per minute per mg protein at 30°C for 15 minutes using a final concentration of 50 μM ATP (0.83 μCi/assay).

Restrictions For Research Use only
Format Liquid
Concentration 0.1 mg/mL
Buffer Recombinant protein in storage buffer (50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 0.25 mM DTT, 0.1 mM EGTA, 0.1 mM EDTA, 0.1 mM PMSF, 30 % glycerol.).
Preservative Dithiothreitol (DTT)
Precaution of Use This product contains dithiothreitol (DTT): a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
Handling Advice Centrifuge the vial prior to opening.
Storage -80 °C
Storage Comment -80°C
Expiry Date 12 months
Supplier Images
Western Blotting (WB) image for Checkpoint Kinase 1 (CHEK1) (Active) protein (ABIN457519) Checkpoint Kinase 1 (CHEK1) (Active) protein
Product cited in: Larsen, Rampalli, Burns, Brunette, Dilworth, Megeney: "Caspase 3/caspase-activated DNase promote cell differentiation by inducing DNA strand breaks." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 107, Issue 9, pp. 4230-5, 2010 (PubMed).

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