2. Signaling Pathways
  3. Cell Cycle/DNA Damage
  4. CDK
  5. CDK9 Isoform

CDK9

CDK9 (cyclin-dependent kinase 9) is a transcription-associated serine/threonine kinase that functions as the catalytic subunit of positive transcription elongation factor b (P-TEFb) and regulates productive RNA polymerase II (RNAPII) elongation through phosphorylation of the RNAPII C-terminal domain and elongation factors.[1][2] Mechanistically, CDK9-cyclin T complexes promote release of promoter-proximally paused RNAPII into gene bodies, thereby controlling transcriptional programs required for cellular responses to developmental and environmental signals.[1][2] Beyond transcriptional elongation, CDK9 contributes to transcription initiation, termination, and maintenance of appropriate transcriptional output, highlighting its central role in gene expression regulation.[1] Dysregulated CDK9 activity has been linked to multiple pathological conditions, particularly cancer, where aberrant transcriptional dependencies create vulnerability to pharmacological CDK9 inhibition.[1][3] In cancer models, activation of P-TEFb-dependent transcription supports oncogenic pathways including MYC, NF-κB, and stress-response signaling, and selective suppression of CDK9 can induce apoptotic programs and impair tumor cell proliferation.[4] Compared with related transcriptional cyclin-dependent kinases such as CDK12 and CDK13, which primarily regulate distinct transcriptional and RNA-processing programs through cyclin K-containing complexes, CDK9 acts as the principal P-TEFb kinase controlling promoter-proximal pause release and rapid transcriptional activation.[1][5] For experimental applications, small-molecule CDK9 inhibitors including flavopiridol have been widely used to suppress RNAPII-dependent transcription, investigate transcriptional addiction, and evaluate therapeutic vulnerabilities associated with transcriptional dysregulation.[1][6]

CDK9 관련 제품 (180):

Cat. No. 상품명 효과 Purity
  • HY-103019A
    (±)-Enitociclib
    		Inhibitor 99.23%
    (±)-Enitociclib ((±)-BAY-1251152) is the racemic mixture of Enitociclib (HY-103019E). Enitociclib is a selective CDK9 inhibitor and apoptosis inducer. Enitociclib inhibits CDK9 activity and reduces the phosphorylation of Ser2 in the carboxyl-terminal domain (CTD) of RNA polymerase Pol II, thereby downregulating the transcription of key oncogenes such as MYC and MCL1. Enitociclib has anti-proliferative activity targeting MYC+ lymphoma and multiple myeloma (MM) cells, and has synergistic effects with Bortezomib (HY-10227) and Lenalidomide (HY-A0003), and can be used in the research of hematological malignancies.
  • HY-X0150
    JSH-150
    		Inhibitor 98.36%
    JSH-150 is a highly selective and potent CDK9 inhibitor with an IC50 of 1 nM.
  • HY-173523
    KI-CDK9d-32
    		Degrader 99.03%
    KI-CDK9d-32 is a highly selective and potent CDK9 PROTAC degrader (DC50: 0.89 nM). KI-CDK9d-32 promotes the ubiquitination and degradation of CDK9. KI-CDK9d-32 inhibits the MYC pathway and disrupts nucleolar homeostasis. KI-CDK9d-32 exhibits anticancer activity against acute lymphoblastic leukemia and pancreatic cancer. (Pink: CDK9 ligand (HY-153718); Blue: E3 ligase CRBN ligand (HY-163233); Black: Linker (HY-W011657); E3 ligase CRBN ligand-linker conjugate (HY-173525)).
  • HY-103712
    Samuraciclib
    		Inhibitor 99.55%
    Samuraciclib (CT7001) is a potent, selective, ATP-competitive and orally active CDK7 inhibitor, with an IC50 of 41 nM. Samuraciclib displays 45-, 15-, 230- and 30-fold selectivity over CDK1, CDK2 (IC50 of 578 nM), CDK5 and CDK9, respectively. Samuraciclib inhibits the growth of breast cancer cell lines with GI50 values between 0.2-0.3 μM. Samuraciclib has anti-tumor effects.
  • HY-12280
    THZ2
    		Inhibitor 99.03%
    THZ2 is a potent and selective CDK7 inhibitor with an IC50 of 13.9 nM.
  • HY-119940
    MC180295
    		Inhibitor 98.07%
    MC180295 ((rel)-MC180295) is a potent and selective CDK9-Cyclin T1 inhibitor, with an IC50 of 5 nM, at least 22-fold more selective for CDK9 over other CDKs. MC180295 also inhibits GSK-3α and GSK-3β. MC180295 ((rel)-MC180295) has potent anti-tumor effect.
  • HY-112626
    CDK12-IN-2
    		Inhibitor 99.36%
    CDK12-IN-2 is a potent, selective and nanomolar CDK12 inhibitor (IC50=52 nM) with good physicochemical properties. CDK12-IN-2 is also a strong CDK13 inhibitor due to CDK13 is the closest homologue of CDK12. CDK12-IN-2 shows excellent kinase selectivity for CDK12 over CDK2, 9, 8, and 7. CDK12-IN-2 inhibits the phosphorylation of Ser2 in the C-terminal domain of RNA polymerase II. CDK12-IN-2 can be used an excellent chemical probe for functional studies of CDK12.
  • HY-112272A
    Lerociclib dihydrochloride
    		Inhibitor 98.51%
    Lerociclib dihydrochloride (G1T38 dihydrochloride) is a potent and selective inhibitor of CDK4/CDK6, with IC50s of 1 nM and 2 nM for CDK4/CyclinD1 and CDK6/CyclinD3, respectively.
  • HY-16559
    Riviciclib hydrochloride
    		99.08%
    Riviciclib hydrochloride (P276-00) is a potent cyclin-dependent kinase (CDK) inhibitor, which inhibits CDK9-cyclinT1, CDK4-cyclin D1, and CDK1-cyclinB with IC50s of 20 nM, 63 nM, and 79 nM, respectively. Riviciclib hydrochloride (P276-00) shows antitumor activity on cisplatin-resistant cells.
  • HY-13266A
    BS-181 hydrochloride
    		Inhibitor 99.93%
    BS-181 hydrochloride is a highly selective CDK7 inhibitor with IC50 of 21 nM, and > 40-fold selective for CDK7 than CDK1, 2, 4, 5, 6, or 9.
  • HY-103628
    PROTAC CDK9 Degrader-1
    		Inhibitor 99.55%
    PROTAC CDK9 Degrader-1 is a PROTAC connected by ligands for Cereblon and CDK as a selective CDK9 degrader.
  • HY-112272
    Lerociclib
    		Inhibitor 98.35%
    Lerociclib (G1T38) is a potent and selective inhibitor of CDK4/6, with IC50s of 1 nM, 2 nM for CDK4/CyclinD1 and CDK6/CyclinD3, respectively.
  • HY-103712B
    Samuraciclib hydrochloride dihydrate
    		Inhibitor 99.90%
    Samuraciclib (CT7001) hydrochloride hydrate is a potent, selective, ATP-competitive and orally active CDK7 inhibitor, with an IC50 of 41 nM. Samuraciclib hydrochloride hydrate displays 45-, 15-, 230- and 30-fold selectivity over CDK1, CDK2 (IC50 of 578 nM), CDK5 and CDK9, respectively. Samuraciclib hydrochloride hydrate inhibits the growth of breast cancer cell lines with GI50 values between 0.2-0.3 μM. Samuraciclib hydrochloride hydrate has anti-tumor effects.
  • HY-12293
    LY2857785
    		Inhibitor 99.21%
    LY2857785 is a type I reversible and competitive ATP kinase inhibitor against CDK9 (IC50 11 nM) and other transcription kinases CDK8 (IC50 16 nM), and CDK7 (IC50 246 nM).
  • HY-162919
    YK-2168
    		Inhibitor 98.05%
    YK-2168 is a potent and selective CDK9 inhibitor with an IC50 of 5.9 nM. YK-2168 inhibits phosphorylation of the CDK9 substrate pS2-RNA Pol II C-terminal domain. YK-2168 induces apoptosis in tumor cells, suppresses expression of CDK9-regulated genes including MYC and Mcl1, and inhibits tumor growth in CDX mice models. YK-2168 can be used for the research of cancer, such as leukemia.
  • HY-124639
    CDK9 inhibitor HH1
    		Inhibitor 99.69%
    CDK9 inhibitor HH1 is a potent and selectively CDK9 inhibitor. CDK9 inhibitor HH1 inhibits the transcription of CDK. CDK9 inhibitor HH1 can be used in research of cancer.
  • HY-13231
    CDK9-IN-1
    		Inhibitor 98.52%
    CDK9-IN-1 is a novel, selective CDK9 inhibitor for the treatment of HIV infection, with an IC50 of 39 nM for CDK9/CycT1, extracted from reference, compound 87.
  • HY-101257B
    YKL-5-124 TFA
    		Inhibitor 99.74%
    YKL-5-124 TFA is a potent, selective, irreversible and covalent CDK7 inhibitor with IC50s of 53.5 nM and 9.7 nM for CDK7 and CDK7/Mat1/CycH, respectively. YKL-5-124 TFA is >100-fold greater selective for CDK7 than CDK9 and CDK2, and inactive against CDK12 and CDK13. YKL-5-124 TFA induces a strong cell-cycle arrest, inhibits E2F-driven gene expression, and exhibits little effect on RNA polymerase II phosphorylation status.
  • HY-169244
    CDK-TCIP1
    		Inhibitor 98.86%
    CDK-TCIP1 is a bivalent molecule linking CDK9 inhibitor SNS-032 (HY-10008) to BCL6 ligand BI3812 (HY-111381). CDK-TCIP1 potently and specifically kills BCL6-overexpressing cells with EC50 of 7.7 nM for SUDHL5 cells.
  • HY-162706
    BSJ-5-63
    		Degrader 99.97%
    BSJ-5-63 is a potent CDK12, CDK7, CDK9 PROTAC degrader. BSJ-5-63 BSJ-5-63 decreases the protein expression of CDK12, CDK7, CDK9, RNAPII, Cyclin K. BSJ-5-63 decreases the mRNA expression of BRCA1, BRCA2. BSJ-5-63 shows anticancer activity and has the potential for the research of prostate cancer (Pink: ligand for target protein (HY-150948); black: linker (HY-W140827); Blue: E3 ligase ligand (HY-112078)).
Cat. No. 상품명 / Synonyms Application Reactivity