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CHK1-IN-4 hydrochloride (Compound 3) is a potent checkpoint kinase 1(chk1) inhibitor, and potently inhibits chk1 phosphorylation in the tumor cells. CHK1-IN-4 hydrochloride has anti-tumor activity [1].
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].
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].
CHK1-IN-4 (Compound 3) is a potent checkpoint kinase 1(chk1) inhibitor, and potently inhibits chk1 phosphorylation in the tumor cells. CHK1-IN-4 has anti-tumor activity [1].
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].
PROTAC Chk1degrader-1 (Compound PROTAC-2 ) is a potent PROTAC-targeted degrader of Chk1 with a DC50 of 1.33 μM. PROTAC Chk1degrader-1 can be used in cancer research [1].
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].
K1586 is an amidine derivative that efficiently targets Chk1. K1586 enhances the degradation of Chk1 that sensitizes colorectal cancer cells to ionizing radiation. K1586 shows anticancer effects [1].
Phosphorylated CHKtide is a synthetic peptide substrate derived from CDC25C, which is phosphorylated by CHK1/CHK2 in one of the DNA repair pathways. Phosphorylated CHKtide is used in the assays of cell cycle checkpoint kinases 1 and 2 (CHK1/CHK2) and salt-inducible kinases (SIKs) [1].
PF 477736 (PF 00477736) is a potent, selective and ATP-competitive inhibitor of Chk1, with a Ki of 0.49 nM, it is also a Chk2 inhibitor, with a Ki of 47 nM. PF 477736 shows <100-fold selectivity for Chk1 over VEGFR2, Fms, Yes, Aurora-A, FGFR3, Flt3, and Ret (IC50=8 (Ki), 10, 14, 23, 23, 25, and 39 nM, respectively). PF 477736 can enhance Gemcitabine antitumor activity in vitro and in vivo [1] .
SB-218078 is a potent, selective, ATP-competitive and cell-permeable checkpoint kinase 1(Chk1) inhibitor that inhibits Chk1 phosphorylation of cdc25C with an IC50 of 15 nM. SB-218078 is less potently inhibits Cdc2 (IC50 of 250 nM) and PKC (IC50 of 1000 nM). SB-218078 causes apoptosis by DNA damage and cell cycle arrest [1] .
GDC0575 (ARRY-575) hydrochloride is a highly-selective and orally active Chk1(IC50=1.2 nM) inhibitor. GDC0575 (ARRY-575) hydrochloride can be used for colitis-associated cancer (CAC) and colitis research [1].
FLT3/CHK-IN-1 (Compound 18) is a dual inhibitor of FLT3/CHK1. FLT3/CHK-IN-1 is more than 1700 times more selective to c-KI T and greatly reduces hERG affinity with an IC50 value of 58.4 μM. FLT3/CHK-IN-1 inhibits tumor growth in mouse xenotransplantation models inoculated with MV-4-11 cells [1].
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].
GDC-0425 (RG-7602) is an orally available, highly selective small molecule ChK1 inhibitor. GDC-0425 can be used for the research of various malignancies [1] .
Gartisertib (VX-803) is an ATP-competitive, orally active, and selective ATR inhibitor, with a Ki of <150 pM. Gartisertib potently inhibits ATR-driven phosphorylated checkpoint kinase-1 (Chk1) phosphorylation with an IC50 of 8 nM. Antitumor activity [1] .
Ziptide is a substrate for MAPK activated protein kinase 2 (MAPKAPK2, Km = 5 μM), MAPKAPK3 (Km = 30 μM), PARK (Km = 40 μM), checkpoint kinase 1 (Chk1, Km = 5 μM), AMP-activated protein kinase (AMPK, Km = 75 μM), and calcium/calmodulin-dependent protein kinase II (CamKII, Km = 300 μM) [1].
SCH900776 S-isomer is the S-isomer of SCH900776. SCH900776 is a potent, selective and orally bioavailable inhibitor of checkpoint kinase1(Chk1) with IC50 of 3 nM.
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.
SAR-020106 is an ATP-competitive, potent, and selective CHK1 inhibitor with an IC50 of 13.3 nM for human CHK1. SAR-020106 shows excellent selectivity over CHK2. SAR-020106 significantly enhances the cell killing of Gemcitabine and SN38 by 3- to 29-fold in several colon tumor lines and in a p53-dependent fashion. SAR-020106 can enhance antitumor activity with selected anticancer agents [1] .
PD0166285, a substrate of P-gp, is a WEE1 inhibitor and a weak Myt1 inhibitor with IC50 values of 24 and 72 nM, respectively. PD0166285 exhibits an IC50 of 3.433 μM for Chk1[1].
PD0166285 dihydrochloride, a substrate of P-gp, is a WEE1 inhibitor and a weak Myt1 inhibitor with IC50 values of 24 and 72 nM, respectively. PD0166285 dihydrochloride exhibits an IC50 of 3.433 μM for Chk1[1].
PD 407824 is a checkpoint kinase Chk1 and WEE1 inhibitor with IC50s of 47 and 97 nM, respectively. PD 407824 is a chemical BMP sensitizer and increases the sensitivity of cells to sub-threshold amounts of BMP4 [1] .
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] .
ML367 is a potent inhibitor of ATPase family AAA domain-containing protein 5 (ATAD5) stabilization, acts as a probe molecule that has low micromolar inhibitory activity. ML367 blocks DNA repair pathways, suppresses general DNA damage responses including RPA32-phosphorylation and CHK1-phosphorylation in response to UV irradiation [1].
Multi-kinase-IN-6 (compound 10e) is a multikinase inhibitor that shows good enzyme inhibitory activity against TrkA, ALK2, c-KIT, EGFR, PIM1, CK2α, CHK1, and CDK2. Multi-kinase-IN-6 reveals antiproliferative activity against MCF7, HCT116 and EKVX with IC50 values of 3.36 μM, 1.40 μM and 3.49 μM, respectively. Multi-kinase-IN-6 shows cell cycle arrest at the G1/S phase and G1 phase in MCF7 and HCT116 cells with good apoptotic effect [1].
CCB02 is a selective CPAP-tubulin interaction inhibitor, binding to tubulin and competing for the CPAP binding site of β-tubulin, with an IC50 of 689 nM, and shows potent anti-tumor activity. CCB02 shows no inhibition on the cell cycle- and centrosome-related kinases, or the phosphorylation status of Aurora A, Plk1, Plk2, CDK2, and CHK1[1].
MRT00033659 is a potent broad-spectrum kinase inhibitor of CK1 (IC50=0.9 µM for CK1δ) and CHK1 (IC50=0.23 µM). MRT00033659, a pyrazolo-pyridine analogue, induces p53 pathway activation and E2F-1 destabilisation [1].
Chk2-IN-1 (compound 1) is a potent and selective inhibitor of checkpoint kinase 2 (Chk2), with IC50s of 13.5 nM and 220.4 nM for Chk2 and Chk1, respectively. Chk2-IN-1 can elicit a strong ataxia telangiectasia mutated (ATM)-dependent Chk2-mediated radioprotection effect [1].
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] .
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] .
Prexasertib 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 [1] .
Prexasertib 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 [1] .
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].
Prexasertib dimesylate (LY2606368 dimesylate) 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 dimesylate inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib dimesylate causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib dimesylate shows potent anti-tumor activity [1] .
GNE-783 is a selective CHK1 inhibitor that enhances the activity of gemcitabine. GNE-783 improves the efficacy of anti-metabolite DNA damage drugs by inactivating S-phase and G2-phase cell cycle checkpoints following DNA damage. GNE-783 selectively enhances the chemical synergy of certain drugs in different tumor types, for example, enhancing the activity of temozolomide only in melanoma cell lines [1].
Prexasertib lactate (LY2606368 lactate) is the lactate form of Prexasertib (HY-18174). Prexasertib lactate 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 lactate inhibits CHK2 (IC50=8 nM) and RSK1 (IC50=9 nM). Prexasertib lactate causes double-stranded DNA breakage and replication catastrophe resulting in apoptosis. Prexasertib lactate shows potent anti-tumor activity [1] .
NSC 109555 is an ATP-competitive inhibitor of checkpoint kinase 2 (Chk2; IC50=200 nM in a cell-free kinase assay). It is selective for Chk2 over Chk1 and 16 kinases in a panel but does inhibit Brk, c-Met, IGFR, and LCK with IC50 values of 210, 6,000, 7,400, and 7,100 nM, respectively. NSC 109555 inhibits Chk2 autophosphorylation and phosphorylation of the Chk2 substrate histone H1 in vitro (IC50=240 nM). It inhibits the growth of, and induces autophagy in, L1210 leukemia cells in vitro.2 NSC 109555 (1,250 nM) potentiates gemcitabine-induced cytotoxicity in MIA PaCa-2, CFPAC-1, PANC-1, and BxPC-3 pancreatic cancer cells, as well as reduces gemcitabine-induced increases in Chk2 phosphorylation and enhances gemcitabine-induced production of reactive oxygen species (ROS) in MIA PaCa-2 cells.
3,4-Dihydro-6,7-isoquinolinediol (compound 7) is a β2-AR agonist with an EC50 of 106.9 μM in CH-K1/GA1S cells. 3,4-Dihydro-6,7-isoquinolinediol can also inhibit the production of NO in mouse macrophage RAW 264.7 cells induced by lipopolysaccharide, showing anti-inflammatory activity [1].
Ro 90-7501 is an amyloid β42 (Aβ42) fibril assembly inhibitor that reduces Aβ42-induced cytotoxicity (EC50 of 2 μM). Ro 90-7501 inhibits ATM phosphorylation and DNA repair. RO 90-7501 selectively enhances toll-like receptor 3 (TLR3) and RIG-I-like receptor (RLR) ligand-induced IFN-β gene expression and antiviral response . Ro 90-7501 also inhibits protein phosphatase 5 (PP5) in a TPR-dependent manner . Ro 90-7501 has significant radiosensitizing effects on cervical cancer cells .
Phosphorylated CHKtide is a synthetic peptide substrate derived from CDC25C, which is phosphorylated by CHK1/CHK2 in one of the DNA repair pathways. Phosphorylated CHKtide is used in the assays of cell cycle checkpoint kinases 1 and 2 (CHK1/CHK2) and salt-inducible kinases (SIKs) [1].
Ziptide is a substrate for MAPK activated protein kinase 2 (MAPKAPK2, Km = 5 μM), MAPKAPK3 (Km = 30 μM), PARK (Km = 40 μM), checkpoint kinase 1 (Chk1, Km = 5 μM), AMP-activated protein kinase (AMPK, Km = 75 μM), and calcium/calmodulin-dependent protein kinase II (CamKII, Km = 300 μM) [1].
The serine/threonine protein kinase CHK1 is essential for checkpoint-mediated cell cycle arrest and DNA repair. It may negatively regulate cell cycle progression and maintain genomic integrity during the normal cell cycle. The kinase recognizes the consensus sequence [R-X-X-S/T] and phosphorylates CDC25A, CDC25B, and CDC25C. Phosphorylation of CDC25A inhibits its activity and promotes proteolysis, while increasing tyrosine phosphorylation of CDK-cyclin complexes. In addition, the kinase phosphorylates RAD51 and TP53, enhancing DNA repair and cell cycle arrest. Chk1 Protein, Human (sf9, GST) is the recombinant human-derived Chk1 protein, expressed by Sf9 insect cells , with N-GST labeled tag. The total length of Chk1 Protein, Human (sf9, GST) is 476 a.a., with molecular weight of ~80 kDa.
Chk1 is a serine/threonine protein kinase that critically coordinates checkpoint-mediated cell cycle arrest and DNA repair in response to DNA damage or unreplicated DNA. It negatively regulates unperturbed cell cycle progression and protects genome integrity by phosphorylating key targets such as CDC25A, CDC25B, CDC25C, RAD51, TP53, histone H3.1, RB1, SPRTN, TLK1 and FANCE. Chk1 Protein, Mouse (sf9, His-GST) is the recombinant mouse-derived Chk1 protein, expressed by Sf9 insect cells , with N-His, N-GST labeled tag. The total length of Chk1 Protein, Mouse (sf9, His-GST) is 476 a.a., with molecular weight of ~78 kDa.
Chk1 Antibody is a non-conjugated and Rabbit origined polyclonal antibody about 54 kDa, targeting to Chk1. It can be used for WB,ICC/IF,IP assays with tag free, in the background of Human, Mouse, Rat.
Chk1 Antibody (YA505) is a non-conjugated and Rabbit origined monoclonal antibody about 54 kDa, targeting to Chk1. It can be used for WB,ICC/IF,IHC-P,FC assays with tag free, in the background of Human, Mouse.
Phospho-Chk1 (Ser296) Antibody is a non-conjugated and Rabbit origined monoclonal antibody about 54 kDa, targeting to Phospho-Chk1 (S296). It can be used for WB,IHC-P assays with tag free, in the background of Human.
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