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CDK inhibitors block cyclin-dependent kinases (CDKs), the serine/threonine kinases that drive the cell cycle. Each CDK becomes active only when bound to a cyclin partner, and successive cyclin-CDK complexes order DNA replication and mitosis. CDK4 and CDK6 pair with D-type cyclins to control progression through G1, while CDK1 governs entry into mitosis. Palbociclib and abemaciclib are selective CDK4/6 inhibitors used to study G1 arrest and retinoblastoma protein phosphorylation. Dinaciclib and seliciclib act on several family members, including CDK2, CDK5 and CDK9, which also links them to transcription research. Ro 3306 inhibits CDK1 and is used to hold cells reversibly at the G2/M boundary for synchronization experiments.
Synonyms: BS181
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.
Synonyms: BIM-X hydrochloride; Ro31-8425 hydrochloride
Bisindolylmaleimide X hydrochloride (BIM-X hydrochloride) is a potent and selective protein kinase C (PKC) inhibitor.
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THZ2 is a potent and selective CDK7 inhibitor with an IC50 of 13.9 nM.
Synonyms: G1T28 hydrochloride
Trilaciclib hydrochloride is a CDK4/6 inhibitor with IC50s of 1 nM and 4 nM for CDK4 and CDK6, respectively.
GW779439X is an inhibitor of cyclin dependent kinase.
JSH-150 is a highly selective and potent CDK9 inhibitor with an IC50 of 1 nM.
PNU112455A hydrochloride is an ATP-competitive CDK2 and CDK5 inhibitor.
BRD6989 is a selective inhibitor of CDK8 and CDK19. BRD6989 upregulates IL-10. BRD6989 is an analog of the natural product cortistatin A (dCA).
BSJ-03-123 is a potent and novel CDK6-selective small-molecule degrader (PROTAC).
SR-4835 is a potent, highly selective and ATP competitive dual inhibitor of CDK12/CDK13 (CDK12: IC50=99 nM, Kd=98 nM; CDK13: Kd=4.9 nM).
AS2863619 is a potent, orally active cyclin-dependent kinase 8 (CDK8) and CDK19 inhibitor with IC50s of 0.61 nM and 4.28 nM, respectively.
Synonyms: 6-Dimethylaminopurine
6-(Dimethylamino)purine is a dual inhibitor of protein kinase and CDK.
Synonyms: MS140
XY028-140 (MS140) is a highly potent and selective dual-function compound that acts as both a CDK4/6 kinase inhibitor and a PROTAC degrader. By combining kinase inhibition with targeted protein degradation, MS140 provides an effective approach for disrupting CDK4/6-mediated cell cycle regulation, making it a valuable tool for cancer research.
TL12-186 is a cereblon-dependent PROTAC degrader with broad-spectrum activity against multiple kinases, including CDKs, BTK, FLT3, Aurora kinases, TEC, ULK, and ITK. It inhibits CDK2/cyclin A and CDK9/cyclin T1 with IC₅₀ values of 73 nM and 55 nM, respectively, making it a valuable tool for studying kinase-driven signaling pathways and cancer biology.
BSJ-03-204 is a potent and selective PROTAC degrader targeting CDK4 and CDK6, constructed by linking Palbociclib to a cereblon ligand. It exhibits IC₅₀ values of 26.9 nM for CDK4/D1 and 10.4 nM for CDK6/D1, without inducing degradation of IKZF1 or IKZF3. BSJ-03-204 demonstrates strong anti-cancer activity and is a valuable tool for cell cycle and oncology research.
BSJ-04-132 is a potent and selective Ribociclib-based PROTAC degrader targeting CDK4, constructed using ligands for cereblon and CDK. It exhibits IC₅₀ values of 50.6 nM for CDK4/D1 and 30 nM for CDK6/D1, while sparing CDK6 and IKZF1/3 from degradation. BSJ-04-132 demonstrates anti-cancer activity and is a valuable tool for cell cycle and oncology research.
PROTAC CDK2/9 Degrader-1 (Compound F3) is a potent dual PROTAC degrader targeting CDK2 (DC₅₀ = 62 nM) and CDK9 (DC₅₀ = 33 nM), constructed by linking a CDK inhibitor to a cereblon ligand. It effectively inhibits PC-3 prostate cancer cell proliferation (IC₅₀ = 0.12 µM) by inducing cell cycle arrest in the S and G2/M phases, making it a valuable tool for cancer and cell cycle research.
BSJ-4-116 is a PROTAC molecule derived from a modified form of the multi-kinase degrader TL12-186, linked to a cereblon ligand and E3 ligase ligand intermediate. It induces time- and concentration-dependent degradation of CDK12 in Jurkat T cells and downregulates genes involved in DNA double-strand break repair at 50 nM. BSJ-4-116 also inhibits MOLT-4 leukemia cell growth in a cereblon-dependent manner, supporting its application in cancer and DNA repair research.
PROTAC CDK12/13 Degrader-1 (7f) TFA is a highly selective dual degrader of CDK12 and CDK13, with DC₅₀ values of 2.2 nM and 2.1 nM, respectively. It exhibits strong antiproliferative activity and is a valuable tool for investigating cell cycle regulation and therapeutic strategies in breast cancer research.
BSJ-03-204 triTFA is a potent and selective PROTAC degrader targeting CDK4/6, constructed using ligands for cereblon and CDK. Based on Palbociclib, it exhibits IC₅₀ values of 26.9 nM for CDK4/D1 and 10.4 nM for CDK6/D1. BSJ-03-204 triTFA does not induce IKZF1/3 degradation and shows anti-cancer activity, making it a valuable tool for cell cycle and oncology research.
XY028-133 (Example 14) is a PROTAC-based degrader targeting CDK4/6, composed of ligands for von Hippel-Lindau (VHL) and CDK. It induces selective degradation of CDK4/6 and exhibits anti-tumor activity, making it a useful tool for cell cycle and cancer research.
LL-K8-22 is a potent, selective, and durable PROTAC degrader targeting the CDK8–cyclin C complex, with DC₅₀ values of 2.52 μM and 2.64 μM, respectively. It suppresses STAT1 Ser727 phosphorylation and inhibits E2F- and MYC-driven oncogenic transcriptional programs. LL-K8-22 shows potential for use in triple-negative breast cancer (TNBC) research and related therapeutic studies.
PROTAC CDK12/13 Degrader-1 (7f) is a highly selective dual degrader targeting CDK12 and CDK13, with DC₅₀ values of 2.2 nM and 2.1 nM, respectively. It exhibits potent anti-proliferative activity and serves as a valuable tool for investigating transcriptional regulation and therapeutic strategies in breast cancer research.
PP-C8 is a potent and selective PROTAC degrader targeting the CDK12–Cyclin K complex. It induces efficient degradation of CDK12 and Cyclin K with DC₅₀ values of 416 nM and 412 nM, respectively. In preclinical models, PP-C8 exhibits strong synergistic antiproliferative effects when combined with PARP inhibitors, particularly in triple-negative breast cancer (TNBC), highlighting its potential as a therapeutic strategy for enhancing DNA damage response–targeted treatments.
BTX-A51 (Casein Kinase Inhibitor A51) is a potent, orally bioavailable inhibitor of casein kinase 1α (CK1α). It effectively induces apoptosis in leukemia cells and demonstrates strong anti-leukemic activity in preclinical models, making it a promising therapeutic candidate for hematologic malignancies.
