Chk1
Chk1 (checkpoint kinase 1) mediates the DNA damage response and normal cell-cycle regulation through checkpoint activation, cell-cycle arrest, DNA repair, and cell death control[1]. Mechanistically, Chk1 functions as a key transducer in genome-integrity checkpoints, especially within ATR-linked responses to stalled replication and genotoxic stress[2][3]. In cancer research, this role makes Chk1 relevant to replication stress, BRCA wild-type ovarian cancer models, and studies combining checkpoint inhibition with DNA-damaging therapy[4][5]. Compared with Chk2, Chk1 shows distinct activation biology and experimentally separable checkpoint functions, while Chk1-S acts as an endogenous splice-variant inhibitor that regulates Chk1-dependent checkpoints[2][6]. For experimental applications, Chk1 inhibitors such as prexasertib/LY2606368 induce replication catastrophe and have been tested in tumor models and recurrent high-grade serous ovarian cancer[7][8].
References:
- [1]. Patil M, et al. Checkpoint kinase 1 in DNA damage response and cell cycle regulation. Cell Mol Life Sci. 2013 Nov;70(21):4009-21. [Content Brief]
- [2]. Bartek J, et al. Chk1 and Chk2 kinases in checkpoint control and cancer. Cancer Cell. 2003 May;3(5):421-9. [Content Brief]
- [3]. Dai Y, et al. New insights into checkpoint kinase 1 in the DNA damage response signaling network. Clin Cancer Res. 2010 Jan 15;16(2):376-83. [Content Brief]
- [4]. Rabezanahary H, et al. Live virus neutralizing antibodies against pre and post Omicron strains in food and retail workers in Québec, Canada. Heliyon. 2024 May 21;10(10):e31026. [Content Brief]
- [5]. Nair J, et al. Resistance to the CHK1 inhibitor prexasertib involves functionally distinct CHK1 activities in BRCA wild-type ovarian cancer. Oncogene. 2020 Aug;39(33):5520-5535. [Content Brief]
- [6]. Pabla N, et al. Checkpoint kinase 1 (Chk1)-short is a splice variant and endogenous inhibitor of Chk1 that regulates cell cycle and DNA damage checkpoints. Proc Natl Acad Sci U S A. 2012 Jan 3;109(1):197-202. [Content Brief]
- [7]. King C, et al. LY2606368 Causes Replication Catastrophe and Antitumor Effects through CHK1-Dependent Mechanisms. Mol Cancer Ther. 2015 Sep;14(9):2004-13. [Content Brief]
- [8]. Lee JM, et al. Prexasertib, a cell cycle checkpoint kinase 1 and 2 inhibitor, in BRCA wild-type recurrent high-grade serous ovarian cancer: a first-in-class proof-of-concept phase 2 study. Lancet Oncol. 2018 Feb;19(2):207-215. [Content Brief]
All Product Categories
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Chk1 Related Products (71)
Related Products (71)
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Recombinant Proteins (2)
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Antibodies (3)
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Chk1-IN-5
0 ImagesChk1-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.
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GNE-900
0 ImagesGNE-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.
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AZD-7762 hydrochloride
0 ImagesAZD-7762 hydrochloride is a potent ATP-competitive checkpoint kinase (Chk) inhibitor in with an IC50 of 5 nM for Chk1.
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CHK1-IN-3
0 ImagesCHK1-IN-3 is a potent and selective CHK1 inhibitor with an IC50 of 0.4 nM. CHK1-IN-3 effectively inhibits the growth of malignant hematopathy cell lines and displays low affinity for hERG (IC50 > 40 μM). CHK1-IN-3 significantly suppresses the tumor growth in vivo. CHK1-IN-3 can be used for the study of hematologic malignancies.
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Chk1-IN-6
0 ImagesChk1-IN-6 is a selective and orally active Chk1 inhibitor with an IC50 of 16.1 nM. Chk1-IN-6 shows antiproliferative activity of MV-4-11 cells. Chk1-IN-6 exerts effective response in the MV-4-11 xenograft mouse model. Chk1-IN-6 exhibits synergistic anticancer effect with Gemcitabine (HY-17026). Chk1-IN-6 can be used in the research of cancers such as acute myeloid leukemia and colorectal adenocarcinoma.
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PROTAC Chk1 degrader-1
0 ImagesPROTAC Chk1 degrader-1 is a Chk1-targeting PROTAC.PROTAC Chk1 degrader-1 recruits the Cereblon E3 ligase to induce ubiquitination and proteasomal degradation of Chk1.PROTAC Chk1 degrader-1 exhibits Chk1 degradation activity in malignant melanoma cells without showing a hook effect.PROTAC Chk1 degrader-1 can be used for the research of malignant melanoma.
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CCT241533
0 ImagesCat. No.: HY-14715CAS No.: 1262849-73-9CCT241533 is a potent and selective ATP competitive inhibitor of CHK2 with an IC50 of 3 nM and Ki of 1.16 nM.
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Prexasertib Mesylate Hydrate
0 ImagesCat. No.: HY-18174BCAS No.: 1234015-57-6Synonyms: LY2606368 Mesylate Hydrate; LY2940930Prexasertib Mesylate Hydrate (LY2606368 Mesylate Hydrate) 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 Mesylate Hydrate inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib Mesylate Hydrate causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib Mesylate Hydrate shows potent anti-tumor activity.
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CBP-501
0 ImagesCat. No.: HY-16129CAS No.: 565434-85-7CBP-501, a cell-permeable calmodulin-binding peptide and a G2-abrogating drug candidate, inhibits the activity of multiple Ser216-specific kinases, such as MAPKAP-K2, C-Tak1, CHK1 and CHK2, with IC50 values of 0.9 μM, 1.4 μM 3.4 μM and 6.5 μM, respectively. CBP-501 is used for various types of cancer.
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BBI-2779
0 ImagesCat. No.: HY-155798CAS No.: 2871057-47-3BBI-2779 is a highly selective, orally active CHK1 inhibitor with a CHK1 IC50 of 0.3 nM. BBI-2779 leverages transcription-replication conflicts on extrachromosomal DNA (ecDNA) to induce synthetic lethality, replication stress, DNA damage and cell death in ecDNA-positive tumor cells. BBI-2779 blocks ecDNA-mediated acquired resistance to targeted therapies and inhibits tumor growth in mouse models of gastric cancer. BBI-2779 is applicable to ecDNA-positive cancer-related research.
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CHK1-IN-4 hydrochloride
0 ImagesCat. No.: HY-128766ACHK1-IN-4 hydrochloride is a selective checkpoint kinase 1 (Chk1) inhibitor with an IC50 ≤ 1 nM. The IC50 value of CHK1-IN-4 hydrochloride against Chk2 ranges from 50 to 100 nM. CHK1-IN-4 hydrochloride inhibits cancer cell proliferation and exhibits antitumor activity in colon cancer xenograft models. CHK1-IN-4 hydrochloride can be used for the research of colon cancer and breast cancer.
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Prexasertib mesylate
0 ImagesCat. No.: HY-18174CCAS No.: 1234015-55-4Synonyms: LY2606368 mesylatePrexasertib mesylate (LY2606368 mesylate) 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 mesylate inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib mesylate causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib mesylate shows potent anti-tumor activity.
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VER-00158411
0 ImagesCat. No.: HY-18942CAS No.: 1174664-88-0VER-00158411 is a checkpoint kinase 1 (CHK1) and CHK2 inhibitor with IC50 values of 4.4 nM and 4.5 nM, respectively.
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CHK1-IN-2
0 ImagesCat. No.: HY-111369CAS No.: 912367-45-4CHK1-IN-2 is a checkpoint kinase 1 (CHK1) inhibitor, with an IC50 of 6 nM.
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Isogranulatimide
0 ImagesCat. No.: HY-112347CAS No.: 244148-46-7Isogranulatimide is a selective checkpoint kinase 1 (Chk1) inhibitor with an IC50 value of 0.1 μM. Isogranulatimide inhibits the G2/M checkpoint and inhibits the growth of p53-mutant tumor cells. Isogranulatimide is promising for research of tumors associated with DNA damage response.
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PD-321852
0 ImagesCat. No.: HY-124731CAS No.: 622856-21-7PD-321852 is a Chk1 inhibitor, with IC50 of 5 nM. PD-321852 can be used in anti-cancer research.
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MCL1020
0 ImagesCat. No.: HY-159707CAS No.: 2309309-69-9
