2. Cell Cycle/DNA Damage
  3. Checkpoint Kinase (Chk)

Checkpoint Kinase (Chk)

DNA damage checkpoint and the spindle checkpoint are two cell cycle surveillance systems, which guard against genomic instability. The DNA damage checkpoint kinases CHK1 and CHK2 are central to the induction of cell cycle arrest, DNA repair, and apoptosis as elements in the DNA-damage checkpoint. The components of the spindle checkpoint include Mad1, Mad2, Mad3(BubR1), Bub3 and the kinases Bub1, Mph1(Mps1) and Aurora B.

Cells that suffer DNA damage activate the checkpoint kinases CHK1 and CHK2, which signal to initiate repair processes, limit cell-cycle progression and prevent cell replication, until the damaged DNA is repaired.

The spindle checkpoint causes metaphase arrest when kinetochore-microtubules are unattached during mitosis. The SAC consists of ‘sensor’ proteins, such as Mad1, Bub1 and Mps1; a ‘signal transducer’, consisting of the mitotic checkpoint complex, composed of Mad2, Bub3, BubR1 and Cdc20; and an ‘effector’ known as the anaphase promoting complex/cyclosome (APC/C).

Checkpoint Kinase (Chk) Related Products (45):

Cat. No. Product Name Effect Purity
  • HY-14720
    Rabusertib Inhibitor 99.99%
    Rabusertib (LY2603618) is a potent and selective inhibitor of Chk1 with an IC50 of 7 nM.
  • HY-10992
    AZD-7762 Inhibitor 99.94%
    AZD-7762 is a potent ATP-competitive checkpoint kinase (Chk) inhibitor in with an IC50 of 5 nM for Chk1.
  • HY-P99032
    Monalizumab Inhibitor 99.69%
    Monalizumab (IPH2201) is an immune checkpoint inhibitor targeting Natural Killer Group 2A (NKG2A). Monalizumab, a humanized anti-NKG2A blocking mAb, increases IFN-γ production, thereby promoting NK cell effector functions. Monalizumab can be used for the research of head and neck squamous cell carcinoma (HNSCC)[1][2].
  • HY-18174
    Prexasertib Inhibitor 98.74%
    Prexasertib (LY2606368) is a selective, ATP-competitive second-generation checkpoint kinase 1 (CHK1) inhibitor with a Ki of 0.9 nM and an IC50 of <1 nM. Prexasertib inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib shows potent anti-tumor activity[1][2].
  • HY-15532
    SCH900776 Inhibitor 99.97%
    SCH900776 (MK-8776) is a potent, selective and orally bioavailable inhibitor of checkpoint kinase1 (Chk1) with an IC50 of 3 nM. SCH900776 shows 50- and 500-fold selectivity over CDK2 and Chk2, respectively[1][2].
  • HY-103366
    NSC 109555 ditosylate Inhibitor
    NSC 109555 ditosylate is a potent, selective, ATP-competitive checkpoint kinase 2 (Chk2) inhibitor with an IC50 of 240 nM. NSC 109555 ditosylate can be used for the research of cancer[1].
  • HY-162367
    FLT3/CHK1-IN-2 Inhibitor
    FLT3/CHK1-IN-2 (Compound 30) is a dual inhibitor of FLT3 and CHK1, with IC50s of 25.63, 16.39, 22.80 nM for CHK1, FLT3-WT, and FLT-D835Y respectively. FLT3/CHK1-IN-2 has favorable oral PK properties and kinase selectivity. FLT3/CHK1-IN-2 can be used for research of acute myeloid leukemia (AML)[1].
  • HY-161383
    CHK1-IN-9 Inhibitor
    CHK1-IN-9 (compound 11) is an orally active CHK1 inhibitor with an IC50 value of 0.55 nM. CHK1-IN-9 can enhance the effect of DNA-damaging drugs on tumor cells. CHK1-IN-9 has synergistic anticancer effects with Gemcitabine (HY-17026)[1].
  • HY-117102
    ANI-7 Activator 98.13%
    ANI-7 is an activator of aryl hydrocarbon receptor (AhR) pathway. ANI-7 inhibits the growth of multiple cancer cells, and potently and selectively inhibits the growth of MCF-7 breast cancer cells with a GI50 of 0.56 μM. ANI-7 induces CYP1-metabolizing mono-oxygenases by activating AhR pathway, and also induces DNA damage, checkpoint Kinase 2 (Chk2) activation, S-phase cell cycle arrest, and cell death in sensitive breast cancer cell lines[1][2][3].
  • HY-18174A
    Prexasertib dihydrochloride Inhibitor 99.41%
    Prexasertib dihydrochloride (LY2606368 dihydrochloride) is a selective, ATP-competitive second-generation checkpoint kinase 1 (CHK1) inhibitor with a Ki of 0.9 nM and an IC50 of <1 nM. Prexasertib dihydrochloride inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib dihydrochloride causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib dihydrochloride shows potent anti-tumor activity[1][2].
  • HY-112167
    GDC-0575 Inhibitor 99.65%
    GDC-0575 (ARRY-575, RG7741) is a highly-selective oral small-molecule Chk1 inhibitor with an IC50 of 1.2 nM.
  • HY-131446
    Chk1-IN-5 Inhibitor
    Chk1-IN-5 is a potent checkpoint kinase 1 (Chk1) inhibitor. Chk1-IN-5 inhibits Chk1 phosphorylation and inhibits tumor growth in colon cancer xenograft model[1].
  • HY-14715B
    CCT241533 hydrochloride Inhibitor 99.87%
    CCT241533 hydrochloride is a potent and selective CHK2 inhibitor with an IC50 of 3 nM and a Ki of 1.16 nM[1].
  • HY-119699
    PV1115 Inhibitor
    PV1115 is a potent and highly selective Chk2 inhibitor with an IC50 of 0.14 nM, 66000 nM, >100000 nM for Chk2, Chk1 and RSK2, respectively. PV1115 is situated within the ATP-binding pocket of Chk2[1].
  • HY-18175
    CCT244747 Inhibitor
    CCT244747 is a potent, orally bioavailable and highly selective CHK1 inhibitor, with an IC50 of 7.7 nM; CCT244747 also abrogates G2 checkpoint with an IC50 of 29 nM.
  • HY-148962
    LY2880070 Inhibitor 98.01%
    LY2880070 is an orally active CHK1 inhibitor. LY2880070 can be used as an anticancer agent for combination with DNA damaging agents[1].
  • HY-14715
    CCT241533 Inhibitor
    CCT241533 is a potent and selective ATP competitive inhibitor of CHK2 with an IC50 of 3 nM and Ki of 1.16 nM[1].
  • HY-103367
    CHK1-IN-7 Inhibitor
    CHK1-IN-7 (Compound 10c) is a potent human CHK1 inhibitor. CHK1-IN-7 shows no single agent effect, potentiates the antiproliferative effect of Gemcitabine HY-17026 in both prostate and breast cancer cell lines. CHK1-IN-7 can be used for the research of cancer[1].
  • HY-15883
    GNE-900 Inhibitor 99.21%
    GNE-900 is a an ATP-competitive, selective, and orally active ChK1 inhibitor with IC50s of 0.0011, 1.5 µM for ChKl, ChK2, respectively. GNE-900 abrogates the G2-M checkpoint, enhances DNA damage, and induces Apoptosis. gemcitabine (HY-17026) and GNE-900 administration shows anti-tumor activity[1].
  • HY-U00345
    CHK-IN-1 Inhibitor
    CHK-IN-1 is an inhibitor of CHK1 and CHK2, with anti-proliferative activities.