1. Cell Cycle/DNA Damage
  2. Checkpoint Kinase (Chk)
  3. CCT245737

CCT245737 (SRA737) is an orally active and seletive Chk1 inhibitor, with an IC50 of 1.3 nM.

For research use only. We do not sell to patients.

CAS No. : 1489389-18-5

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10 mM * 1 mL in DMSO
ready for reconstitution
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Customer Review

Based on 4 publication(s) in Google Scholar

Other Forms of CCT245737:

Top Publications Citing Use of Products

    CCT245737 purchased from MedChemExpress. Usage Cited in: Nucleic Acids Res. 2025 Jul 8;53(13):gkaf626.  [Abstract]

    XPC K63-linked ubiquitylation was enhanced by CHK1 inhibition. 293T cells were pretreated with 5 μM CHK1 inhibitor CCT245737 (CHK1i) for 2 h before UV, and XPC K63-ubiquitin modification was analyzed.

    CCT245737 purchased from MedChemExpress. Usage Cited in: Nucleic Acids Res. 2025 Jul 8;53(13):gkaf626.  [Abstract]

    CHK1 inhibition recapitulated the effect of BTG3 KO in delaying VCP/p97 nuclear translocation. Confocal microscopic imaging of VCP/p97 was conducted with HaCaT cells pretreated or not with CHK1i for 2 h.

    View All Checkpoint Kinase (Chk) Isoform Specific Products:

    • Biological Activity

    • Protocol

    • Purity & Documentation

    • References

    • Customer Review

    Description

    CCT245737 (SRA737) is an orally active and seletive Chk1 inhibitor, with an IC50 of 1.3 nM.

    IC50 & Target[1]

    Chk1

    1.3 nM (IC50)

    Chk2

    2440 nM (IC50)

    ERK8

    130 nM (IC50)

    PKD1

    298 nM (IC50)

    RSK2

    361 nM (IC50)

    RSK1

    362 nM (IC50)

    FLT3

    582 nM (IC50)

    MARK3

    698 nM (IC50)

    NUAK1

    711 nM (IC50)

    CLK2

    1370 nM (IC50)

    BRSK1

    1660 nM (IC50)

    AMPK

    2970 nM (IC50)

    PHK

    3470 nM (IC50)

    CDK2/CyclA

    3850 nM (IC50)

    CDK1/CyclB

    9030 nM (IC50)

    Cellular Effect
    Cell Line Type Value Description References
    A2780 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human A2780 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human A2780 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    A549 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human A549 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human A549 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    Calu-6 GI50
    0.046 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human Calu-6 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    Cytotoxicity against human Calu-6 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    [PMID: 26295308]
    Calu-6 GI50
    0.32 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human Calu-6 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    Cytotoxicity against human Calu-6 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    [PMID: 26295308]
    Calu-6 GI50
    0.41 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human Calu-6 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    Cytotoxicity against human Calu-6 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    [PMID: 26295308]
    HCT-116 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human HCT-116 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human HCT-116 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    HEK293 GI50
    1.387 μM
    Compound: CCT245737
    Antiproliferative activity against human HEK293 cells after 72 hrs by MTS assay
    Antiproliferative activity against human HEK293 cells after 72 hrs by MTS assay
    [PMID: 29684894]
    HL-60 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human HL-60 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human HL-60 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    HT-29 GI50
    0.09 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human HT-29 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    Cytotoxicity against human HT-29 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    [PMID: 26295308]
    HT-29 GI50
    0.39 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human HT-29 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    Cytotoxicity against human HT-29 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    [PMID: 26295308]
    HT-29 GI50
    0.7 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human HT-29 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    Cytotoxicity against human HT-29 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    [PMID: 26295308]
    HT-29 GI50
    9.223 μM
    Compound: CCT245737
    Antiproliferative activity against human HT-29 cells after 72 hrs by MTS assay
    Antiproliferative activity against human HT-29 cells after 72 hrs by MTS assay
    [PMID: 29684894]
    HT-29 IC50
    176.62 nM
    Compound: CCT245737
    Synergistic antiproliferative activity against human HT-29 cells assessed as inhibition of cell proliferation incubated for 72 hrs in presence of 50 nM gemcitabine by CCK-8 assay
    Synergistic antiproliferative activity against human HT-29 cells assessed as inhibition of cell proliferation incubated for 72 hrs in presence of 50 nM gemcitabine by CCK-8 assay
    [PMID: 38547734]
    HT-29 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human HT-29 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human HT-29 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    MDA-MB-468 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human MDA-MB-468 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human MDA-MB-468 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    MIA PaCa-2 GI50
    0.066 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human MIA PaCa-2 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    Cytotoxicity against human MIA PaCa-2 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    [PMID: 26295308]
    MIA PaCa-2 GI50
    0.43 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human MIA PaCa-2 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    Cytotoxicity against human MIA PaCa-2 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    [PMID: 26295308]
    MIA PaCa-2 GI50
    1.3 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human MIA PaCa-2 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    Cytotoxicity against human MIA PaCa-2 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    [PMID: 26295308]
    MV4-11 IC50
    211.13 nM
    Compound: CCT-245737
    Antiproliferative activity against human MV4-11 cells expressing FLT3 ITD/TKD mutant incubated for 72 hrs by absorbance based microplate reader
    Antiproliferative activity against human MV4-11 cells expressing FLT3 ITD/TKD mutant incubated for 72 hrs by absorbance based microplate reader
    [PMID: 38389894]
    MV4-11 IC50
    244.6 nM
    Compound: CCI245737
    Antiproliferative activity against human MV4-11 cells assessed as reduction in cell viability incubated for 72 hrs by CellTiter 96 Aqueous One Solution Cell Proliferation Assay
    Antiproliferative activity against human MV4-11 cells assessed as reduction in cell viability incubated for 72 hrs by CellTiter 96 Aqueous One Solution Cell Proliferation Assay
    [PMID: 37584545]
    MV4-11 IC50
    4.31 nM
    Compound: CCT245737
    Antiproliferative activity against human MV4-11 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human MV4-11 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    MV4-11 IC50
    587.5 nM
    Compound: CCT245737
    Antiproliferative activity against human MV4-11 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human MV4-11 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    MV4-11 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human MV4-11 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human MV4-11 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    OVCAR-3 IC50
    > 10000 nM
    Compound: CCT245737
    Antiproliferative activity against human OVCAR-3 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    Antiproliferative activity against human OVCAR-3 cells assessed as inhibition of cell proliferation incubated for 72 hrs by by CCK-8 assay
    [PMID: 38547734]
    SW-620 GI50
    0.33 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human SW620 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    Cytotoxicity against human SW620 cells assessed as growth inhibition measured after 96 hrs in presence of Gemcitabine by SRB assay
    [PMID: 26295308]
    SW-620 GI50
    1.8 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human SW620 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    Cytotoxicity against human SW620 cells assessed as growth inhibition measured after 96 hrs in presence of SN38 by SRB assay
    [PMID: 26295308]
    SW-620 GI50
    5.4 μM
    Compound: Chemical probe: CCT245737
    Cytotoxicity against human SW620 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    Cytotoxicity against human SW620 cells assessed as growth inhibition measured after 96 hrs by SRB assay
    [PMID: 26295308]
    In Vitro

    CCT245737 (10 μM) shows >80% inhibition of a panel of 124 kinases, including ERK8, PKD1, RSK2 and RSK1 with IC50s of 130, 298, 361 and 362 nM[1]. CCT245737 abrogates an VP-16-induced G2 checkpoint in HT29, SW620, MiaPaCa-2, and Calu6 cell lines, with IC50s ranging from 30 to 220 nM[2].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    In Vivo

    CCT245737 (150 mg/kg p.o.) inhibits tumor growth in combination with LY 188011 (100 mg/kg iv) in HT29 colon cancer xenografts. CCT245737 (300 mg/kg, p.o.) also inhibits the LY 188011 (60 mg/kg iv) induced pSer296 CHK1 autophosphorylation at 24 h in SW620 human colon cancer xenografts[1]. CCT245737 (150 mg/kg, p.o) alone significantly inhibits tumor growth in an Eμ-Myc mouse model of human B-cell lymphocytic leukemia[2].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Clinical Trial
    Molecular Weight

    379.34

    Formula

    C16H16F3N7O

    CAS No.
    Appearance

    Solid

    Color

    White to yellow

    SMILES

    FC(F)(F)C(C=NC(NC1=CN=C(C#N)C=N1)=C2)=C2NC[C@H]3CNCCO3

    Shipping

    Room temperature in continental US; may vary elsewhere.

    Storage
    Powder -20°C 3 years
    4°C 2 years
    In solvent -80°C 2 years
    -20°C 1 year
    Solvent & Solubility
    In Vitro: 

    DMSO : 50 mg/mL (131.81 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 2.6362 mL 13.1808 mL 26.3616 mL
    5 mM 0.5272 mL 2.6362 mL 5.2723 mL
    View the Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

    • Molarity Calculator

    • Dilution Calculator

    Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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    Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

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    In Vivo:

    Select the appropriate dissolution method based on your experimental animal and administration route.

    For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
    To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  10% DMSO    90% Corn Oil

      Solubility: ≥ 5 mg/mL (13.18 mM); Clear solution

      This protocol yields a clear solution of ≥ 5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (50.0 mg/mL) to 900 μL Corn oil, and mix evenly.

    • Protocol 2

      Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

      Solubility: ≥ 2.5 mg/mL (6.59 mM); Clear solution

      This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

      Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

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    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
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    Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
    The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
    Calculation results:
    Working solution concentration: mg/mL
    Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
    The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
    Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
     If the continuous dosing period exceeds half a month, please choose this protocol carefully.
    Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
    Purity & Documentation

    Purity: 99.48%

    References
    Cell Assay
    [2]

    Cytotoxicity is determined as the drug concentration that gives 50% inhibition of tumor cell proliferation (GI50) using a 96 h Sulforhodamine B (SRB) assay. Inhibition of intracellular CHK1 activity is measured using a cell based ELISA for the abrogation of an VP-16 induced G2 checkpoint (mitosis induction assay, MIA). The IC50 for G2 checkpoint abrogation (MIA) is determined in the presence of nocodazole using UCN01 as a positive control. The activity index (AI) is used as a measure of the compounds ability to induce mitosis relative to its toxicity (i.e., ratio of MIA IC50: 96 h SRB GI50). Routine potentiation studies are carried out using a fixed concentration (GI50) of either LY 188011 or SN38 in combination with a range of CCT245737 concentrations to determine the combination GI50 of CCT245737. The ability of CCT245737 to enhance LY 188011 or SN38 cell killing is expressed as a potentiation index (PI) equal to the ratio of the GI50 for CCT245737 alone versus the combination GI50 for CCT245737. PI values > 1 indicate potentiation of the genotoxic activity. In addition, a series of experiments is carried out using fixed, non- or minimally toxic concentrations of CCT245737 (≤GI20) with a range of different concentrations of LY 188011 or SN38 to determine the extent to which CCT245737 enhances drug cytotoxicity compared with the genotoxic agent alone, i.e. conventional PI (ratio GI50 genotoxic alone: GI50 genotoxic combined with non-toxic CCT245737 concentration, Con PI)[2].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Administration
    [1]

    Human HT29 colorectal carcinoma cells are injected s.c into the flanks of female NCr athymic mice 6-8 weeks of age. Dosing commenced 5 days after transplantation when tumors reach a mean diameter of 5.5 mm. LY 188011 (100 mg/kg i.v.) is dosed in saline on days 0, 7 and 14 and compounds 4 (CCT245737) and 41 (150 mg/kg p.o.) in 10% DMSO 20% PEG 400, 5% Tween 80, 65% water, 24 and 48 h after each dose of LY 188011. Tumors are measured and body weights recorded three times weekly. Animals are culled on an individual basis when tumors reach a predetermined humane endpoint (mean diameter <15 mm)[1].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    References

    Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    DMSO 1 mM 2.6362 mL 13.1808 mL 26.3616 mL 65.9039 mL
    5 mM 0.5272 mL 2.6362 mL 5.2723 mL 13.1808 mL
    10 mM 0.2636 mL 1.3181 mL 2.6362 mL 6.5904 mL
    15 mM 0.1757 mL 0.8787 mL 1.7574 mL 4.3936 mL
    20 mM 0.1318 mL 0.6590 mL 1.3181 mL 3.2952 mL
    25 mM 0.1054 mL 0.5272 mL 1.0545 mL 2.6362 mL
    30 mM 0.0879 mL 0.4394 mL 0.8787 mL 2.1968 mL
    40 mM 0.0659 mL 0.3295 mL 0.6590 mL 1.6476 mL
    50 mM 0.0527 mL 0.2636 mL 0.5272 mL 1.3181 mL
    60 mM 0.0439 mL 0.2197 mL 0.4394 mL 1.0984 mL
    80 mM 0.0330 mL 0.1648 mL 0.3295 mL 0.8238 mL
    100 mM 0.0264 mL 0.1318 mL 0.2636 mL 0.6590 mL
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    • Do most proteins show cross-species activity?

      Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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    Product Name:
    CCT245737
    Cat. No.:
    HY-18958
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