Chk

Signaling Pathway Map

Research Area

Inhibitory Selectivity

Isoform-specific Inhibitors

Chk Products

Catalog No. Information Product Use Citations Product Validations
S1532

AZD7762

AZD7762 is a potent and selective inhibitor of Chk1 with IC50 of 5 nM in a cell-free assay. It is equally potent against Chk2 and less potent against CAM, Yes, Fyn, Lyn, Hck and Lck. Phase 1.

S2626

Rabusertib (LY2603618)

Rabusertib (LY2603618) is a highly selective Chk1 inhibitor with potential anti-tumor activity in a cell-free assay. IC50=7 nM, showing approximately 100-fold more potent against Chk1 than against any of the other protein kinases evaluated. Rabusertib (LY2603618) induces cell cycle arrest, DNA damage response and autophagy in cancer cells. Rabusertib (LY2603618) induces bak-dependent apoptosis in AML cell lines.

S2735

MK-8776 (SCH 900776)

MK-8776 (SCH 900776) is a selective Chk1 inhibitor with IC50 of 3 nM in a cell-free assay. It shows 500-fold selectivity against Chk2. Phase 2.

S2683

CHIR-124

CHIR-124 is a novel and potent Chk1 inhibitor with IC50 of 0.3 nM in a cell-free assay. It shows 2,000-fold selectivity against Chk2, 500- to 5,000-fold less activity against CDK2/4 and Cdc2.

S2904

PF-477736

PF-477736 is a selective, potent and ATP-competitive Chk1 inhibitor with Ki of 0.49 nM in a cell-free assay and also inhibits VEGFR2, Aurora-A, FGFR3, Flt3, Fms (CSF1R), Ret and Yes. It shows ~100-fold selectivity for Chk1 than Chk2. Phase 1.

S9639New

VX-803 (M4344)

VX-803 (M4344) is an ATP-competitive, orally active, and selective inhibitor of ataxia telangiectasia and Rad3 related (ATR) kinase with Ki of < 150 pM. VX-803 (M4344) potently inhibits ATR-driven phosphorylated checkpoint kinase-1 (P-Chk1) phosphorylation with IC50 of 8 nM. VX-803 (M4344) exhibits potential antineoplastic activity.

S8526

GDC-0575 (ARRY-575)

GDC-0575 (ARRY-575, RG7741) is a potent and selective CHK1 inhibitor with an IC50 of 1.2 nM.

S7740

SAR-020106

SAR-020106 is an ATP-competitive, potent, and selective CHK1 inhibitor with an IC50 of 13.3 nM.

S8253

CCT245737

CCT245737 is an orally active CHK1 inhibitor with The IC50 of 1.4 nM. It exhibits >1,000-fold selectivity against CHK2 and CDK1.

S8148

PD0166285

PD0166285 is a potent Wee1 and Chk1 inhibitor with activity at nanomolar concentrations (IC50=24 nM for Wee1 and 72 nM for Myt1). PD0166285 is also a novel G2 checkpoint abrogator. PD0166285 induces apoptosis.

S8632

Chk2 Inhibitor II (BML-277)

Chk2 Inhibitor II (BML-277) is an ATP-competitive inhibitor of Chk2 with IC50 of 15 nM. It is 1000-fold more selective toward Chk2 serine/threonine kinase than for Chk1 and Cdk1/B kinases. Chk2 Inhibitor II (BML-277) dose dependently protects human CD4(+) and CD8(+) T-cells from apoptosis due to ionizing radiation.

S7178

Prexasertib HCl (LY2606368)

Prexasertib (LY2606368) is an ATP-competitive CHK1 inhibitor with a Ki value of 0.9 nmol/L. For CHK2 and RSK, its IC50 values are 8 nM and 9 nM respectively in cell-free assay.

Catalog No. Information Product Use Citations Product Validations
S1532

AZD7762

AZD7762 is a potent and selective inhibitor of Chk1 with IC50 of 5 nM in a cell-free assay. It is equally potent against Chk2 and less potent against CAM, Yes, Fyn, Lyn, Hck and Lck. Phase 1.

S2626

Rabusertib (LY2603618)

Rabusertib (LY2603618) is a highly selective Chk1 inhibitor with potential anti-tumor activity in a cell-free assay. IC50=7 nM, showing approximately 100-fold more potent against Chk1 than against any of the other protein kinases evaluated. Rabusertib (LY2603618) induces cell cycle arrest, DNA damage response and autophagy in cancer cells. Rabusertib (LY2603618) induces bak-dependent apoptosis in AML cell lines.

S2735

MK-8776 (SCH 900776)

MK-8776 (SCH 900776) is a selective Chk1 inhibitor with IC50 of 3 nM in a cell-free assay. It shows 500-fold selectivity against Chk2. Phase 2.

S2683

CHIR-124

CHIR-124 is a novel and potent Chk1 inhibitor with IC50 of 0.3 nM in a cell-free assay. It shows 2,000-fold selectivity against Chk2, 500- to 5,000-fold less activity against CDK2/4 and Cdc2.

S2904

PF-477736

PF-477736 is a selective, potent and ATP-competitive Chk1 inhibitor with Ki of 0.49 nM in a cell-free assay and also inhibits VEGFR2, Aurora-A, FGFR3, Flt3, Fms (CSF1R), Ret and Yes. It shows ~100-fold selectivity for Chk1 than Chk2. Phase 1.

S9639New

VX-803 (M4344)

VX-803 (M4344) is an ATP-competitive, orally active, and selective inhibitor of ataxia telangiectasia and Rad3 related (ATR) kinase with Ki of < 150 pM. VX-803 (M4344) potently inhibits ATR-driven phosphorylated checkpoint kinase-1 (P-Chk1) phosphorylation with IC50 of 8 nM. VX-803 (M4344) exhibits potential antineoplastic activity.

S8526

GDC-0575 (ARRY-575)

GDC-0575 (ARRY-575, RG7741) is a potent and selective CHK1 inhibitor with an IC50 of 1.2 nM.

S7740

SAR-020106

SAR-020106 is an ATP-competitive, potent, and selective CHK1 inhibitor with an IC50 of 13.3 nM.

S8253

CCT245737

CCT245737 is an orally active CHK1 inhibitor with The IC50 of 1.4 nM. It exhibits >1,000-fold selectivity against CHK2 and CDK1.

S8148

PD0166285

PD0166285 is a potent Wee1 and Chk1 inhibitor with activity at nanomolar concentrations (IC50=24 nM for Wee1 and 72 nM for Myt1). PD0166285 is also a novel G2 checkpoint abrogator. PD0166285 induces apoptosis.

S8632

Chk2 Inhibitor II (BML-277)

Chk2 Inhibitor II (BML-277) is an ATP-competitive inhibitor of Chk2 with IC50 of 15 nM. It is 1000-fold more selective toward Chk2 serine/threonine kinase than for Chk1 and Cdk1/B kinases. Chk2 Inhibitor II (BML-277) dose dependently protects human CD4(+) and CD8(+) T-cells from apoptosis due to ionizing radiation.

S7178

Prexasertib HCl (LY2606368)

Prexasertib (LY2606368) is an ATP-competitive CHK1 inhibitor with a Ki value of 0.9 nmol/L. For CHK2 and RSK, its IC50 values are 8 nM and 9 nM respectively in cell-free assay.

Tags: Checkpoint activation | Checkpoint kinase | Checkpoint function | Checkpoint activity | Chk1 phosphorylation | Checkpoint pathway | Chk1 pathway | Chk2 pathway | Chk2 phosphorylation | Chk1 inhibitor clinical trial | Chk1 inhibition | Chk1 activation | Chk2 activation | Chk1 assay | Chk inhibitors review