2. Signaling Pathways
  3. Cell Cycle/DNA Damage
  4. CDK
  5. CDK4 Isoform

CDK4

Cyclin-dependent kinase 4 also known as cell division protein kinase 4 is an enzyme that in humans is encoded by the CDK4 gene. CDK4 is a member of the cyclin-dependent kinase family.It is a catalytic subunit of the protein kinase complex that is important for cell cycle G1 phase progression. The activity of this kinase is restricted to the G1-S phase, which is controlled by the regulatory subunits D-type cyclins and CDK inhibitor p16INK4a. This kinase was shown to be responsible for the phosphorylation of retinoblastoma gene product (Rb). Ser/Thr-kinase component of cyclin D-CDK4 (DC) complexes that phosphorylate and inhibit members of the retinoblastoma (RB) protein family including RB1 and regulate the cell-cycle during G1/S transition. Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complexes and the subsequent transcription of E2F target genes which are responsible for the progression through the G1 phase. Hypophosphorylates RB1 in early G1 phase. Cyclin D-CDK4 complexes are major integrators of various mitogenic and antimitogenic signals. Also phosphorylates SMAD3 in a cell-cycle-dependent manner and represses its transcriptional activity. Component of the ternary complex, cyclin D/CDK4/CDKN1B, required for nuclear translocation and activity of the cyclin D-CDK4 complex.

Cat. No. Product Name Effect Purity
  • HY-50767
    Palbociclib
    		Inhibitor 99.94%
    Palbociclib (PD 0332991) is an orally active selective CDK4 and CDK6 inhibitor with IC50 values of 11 and 16 nM, respectively. Palbociclib has potent anti-proliferative activity and induces cell cycle arrest in cancer cells, which can be used in the research of HR-positive and HER2-negative breast cancer and hepatocellular carcinoma.
  • HY-16297A
    Abemaciclib
    		Inhibitor 99.97%
    Abemaciclib (LY2835219) is a selective CDK4/6 inhibitor with IC50 values of 2 nM and 10 nM for CDK4 and CDK6, respectively.
  • HY-15777
    Ribociclib
    		Inhibitor 99.94%
    RRibociclib (LEE011) is an ATP-competitive and orally active CDK4/6 inhibitor with IC50 values of 10 nM and 39 nM, respectively, and is over 1,000-fold less potent against the cyclin B/CDK1 complex.
  • HY-10005
    Flavopiridol
    		Inhibitor 99.73%
    Flavopiridol (Alvocidib) is a broad spectrum and competitive inhibitor of CDKs, inhibiting CDK1, CDK2, CDK4 with IC50s of 30, 170, 100 nM, respectively.
  • HY-101563
    GSK3326595
    		99.83%
    GSK3326595 is a protein arginine methyltransferase 5 (PRMT5) inhibitor. GSK3326595 decreases SARS-CoV-2 infection, inhibits cancer cell proliferation and induces pro-inflammatory macrophage polarization and increases hepatic triglyceride levels without affecting atherosclerosis. GSK3326595 can be used for research of relapsed/refractory mantle cell lymphoma.
  • HY-164129
    CDK4-IN-3
    		Inhibitor 98.07%
    CDK4-IN-3 (Compound 389) is a potent irreversible cyclin-dependent kinase 4 (CDK4) inhibitor (IC50=25 nM, >10-fold selective over CDK6). CDK4-IN-3 arrests the cell cycle at G₁ phase, and induces tumor cell apoptosis. CDK4-IN-3 is promising for research of solid tumors such as breast and lung cancers.
  • HY-142696A
    CDK6/PIM1-IN-1 hydrochloride
    		Inhibitor 99.38%
    CDK6/PIM1-IN-1 (Compound 51) hydrochloride is an orally active and potent dual CDK6/PIM1 inhibitor with IC50 values of 39 and 88 nM, respectively. CDK6/PIM1-IN-1 hydrochloride inhibits CDK4 (IC50=3.6 nM). CDK6/PIM1-IN-1 hydrochloride significantly inhibits acute myeloid leukemia (AML) cell proliferation, arrest cell cycle at the G1 phase, and promote cell apoptosis. CDK6/PIM1-IN-1 exhibits potent anti-AML activity.
  • HY-168996
    LA-CB1
    		Degrader
    LA-CB1 is an Abemaciclib (HY-16297A) derivative that targets CDK4/6 and promotes its degradation via the ubiquitin-proteasome pathway, thereby disrupting the CDK4/6-Cyclin D1-Rb-E2F axis and inducing G0/G1 cell cycle arrest and apoptosis. LA-CB1 exhibits antiproliferative activity against MDA-MB-231 cells, with an IC50 of 0.27 µM, and effectively inhibits epithelial-mesenchymal transition (EMT), cell migration, invasion, and angiogenesis. In highly aggressive models such as triple-negative breast cancer (TNBC), LA-CB1 significantly suppresses tumor growth in a dose-dependent manner. LA-CB1 holds potential for research in the field of breast cancer.
  • HY-50767A
    Palbociclib monohydrochloride
    		Inhibitor 99.98%
    Palbociclib (PD 0332991) monohydrochloride is an orally active selective CDK4 and CDK6 inhibitor with IC50 values of 11 and 16 nM, respectively. Palbociclib monohydrochloride has potent anti-proliferative activity and induces cell cycle arrest in cancer cells, which can be used in the research of HR-positive and HER2-negative breast cancer and hepatocellular carcinoma.
  • HY-A0065
    Palbociclib isethionate
    		Inhibitor 99.95%
    Palbociclib (PD 0332991) isethionate is an orally active selective CDK4 and CDK6 inhibitor with IC50 values of 11 and 16 nM, respectively. Palbociclib isethionate has potent anti-proliferative activity and induces cell cycle arrest in cancer cells, which can be used in the research of HR-positive and HER2-negative breast cancer and hepatocellular carcinoma.
  • HY-50767C
    Palbociclib hydrochloride
    		Inhibitor 99.89%
    Palbociclib (PD 0332991) hydrochloride is an orally active selective CDK4 and CDK6 inhibitor with IC50 values of 11 and 16 nM, respectively. Palbociclib hydrochloride has potent anti-proliferative activity and induces cell cycle arrest in cancer cells. Palbociclib hydrochloride can be used in the research of HR-positive and HER2-negative breast cancer and hepatocellular carcinoma.
  • HY-16297
    Abemaciclib methanesulfonate
    		Inhibitor 99.95%
    Abemaciclib methanesulfonate (LY2835219 methanesulfonate) is a selective CDK4/6 inhibitor with IC50s of 2 nM and 10 nM for CDK4 and CDK6, respectively.
  • HY-10008
    SNS-032
    		Inhibitor 99.54%
    SNS-032 (BMS-387032) is a potent and selective inhibitor of CDK2, CDK7, and CDK9 with IC50s of 38 nM, 62 nM and 4 nM, respectively. SNS-032 has antitumor effect.
  • HY-103248
    Toyocamycin
    		Inhibitor 99.78%
    Toyocamycin (Vengicide) is an adenosine analog produced by Streptomyces diastatochromogenes, acts as an XBP1 inhibitor. Toyocamycin blocks RNA synthesis and ribosome function, and induces apoptosis. Toyocamycin affects IRE1α-XBP1 pathway, and inhibits XBP1 mRNA cleavage with an IC50 value of 80 nM with affecting IRE1α auto-phosphorylation. Toyocamycin specifically inhibits CDK9 with an IC50 value of 79 nM.
  • HY-10580
    GSK 3 Inhibitor IX
    		Inhibitor 99.73%
    GSK 3 Inhibitor IX (6-Bromoindirubin-3'-oxime; BIO) is a potent, selective, reversible and ATP-competitive inhibitor of GSK-3α/β and CDK1-cyclinB complex with IC50s of 5 nM/320 nM/80 nM for (GSK-3α/β)/CDK1/CDK5, respectively.
  • HY-103712A
    Samuraciclib hydrochloride
    		Inhibitor 99.98%
    Samuraciclib hydrochloride (CT7001 hydrochloride) is a potent, selective, ATP-competitive and orally active CDK7 inhibitor, with an IC50 of 41 nM. Samuraciclib hydrochloride displays 45-, 15-, 230- and 30-fold selectivity over CDK1, CDK2 (IC50 of 578 nM), CDK5 and CDK9, respectively. Samuraciclib hydrochloride inhibits the growth of breast cancer cell lines with GI50 values between 0.2-0.3 µM. Samuraciclib hydrochloride has anti-tumor effects.
  • HY-10329
    JNJ-7706621
    		Inhibitor 99.91%
    JNJ-7706621 is a potent aurora kinase inhibitor, and also inhibits CDK1 and CDK2, with IC50s of 9 nM, 3 nM, 11 nM, and 15 nM for CDK1, CDK2, aurora-A and aurora-B, respectively.
  • HY-50940
    AT7519
    		Inhibitor 99.76%
    AT7519 (AT7519M) as a potent inhibitor of CDKs, with IC50s of 210, 47, 100, 13, 170, and <10 nM for CDK1, CDK2, CDK4 to CDK6, and CDK9, respectively.
  • HY-137478A
    KB-0742 dihydrochloride
    		Inhibitor 99.24%
    KB-0742 dihydrochloride is a potent, selective and orally active CDK9 inhibitor with an IC50 of 6 nM for CDK9/cyclin T1. KB-0742 dihydrochloride is selective for CDK9/cyclin T1 with >50-fold selectivity over other CDK kinases. KB-0742 dihydrochloride has potent anti-tumor activity.
  • HY-10012
    AZD-5438
    		Inhibitor 99.91%
    AZD-5438 is a potent CDK1, CDK2, and CDK9 inhibitor, with IC50s of 16 nM, 6 nM, and 20 nM in cell-free assays, respectively. AZD-5438 shows less inhibition activity against GSK3β, CDK5 and CDK6 .
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity