Date published: 2026-4-20

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Cdk9 Inhibitors

Cyclin-dependent kinase 9 (Cdk9) is an integral enzyme in the family of cyclin-dependent kinases (Cdks), which are paramount for the regulation of the cell cycle and transcriptional elongation processes. Cdk9, in association with its cyclin partners (typically cyclin T1), constitutes a critical component of the positive transcription elongation factor b (P-TEFb). The primary role of P-TEFb is to facilitate the transition of RNA polymerase II (RNAPII) from initiation to elongation during transcription, primarily by phosphorylating the carboxy-terminal domain (CTD) of RNAPII. Given its vital role in transcriptional regulation, Cdk9 is a focus of interest in biochemical and molecular biology studies. Inhibitors targeting Cdk9 are chemicals that suppress the kinase activity of Cdk9, effectively hindering its ability to phosphorylate its substrates. These inhibitors can exhibit varied modes of action, including competitive and non-competitive inhibition. They might target the ATP-binding pocket of the kinase, preventing ATP from accessing the site, or they could bind to allosteric regions of the enzyme, inducing conformational alterations that diminish Cdk9's activity. The structural diversity of Cdk9 inhibitors spans from small synthetic molecules to intricate natural compounds.

Items 11 to 17 of 17 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Cdk/Crk Inhibitor

784211-09-2sc-203872
1 mg
$290.00
(0)

Cdk/Crk Inhibitor is a selective modulator of Cdk9, distinguished by its unique ability to disrupt the enzyme's phosphorylation cascade. By forming specific hydrogen bonds with key residues in the active site, it induces a conformational shift that impedes substrate access. This inhibitor also alters the dynamics of protein-protein interactions, impacting cellular signaling networks and transcriptional regulation. Its kinetic profile reveals a rapid onset of action, underscoring its potential for fine-tuning cellular processes.

AT7519

844442-38-2sc-364416
sc-364416A
sc-364416B
sc-364416C
5 mg
10 mg
100 mg
1 g
$291.00
$341.00
$1046.00
$3126.00
1
(0)

AT7519 is a multi-CDK inhibitor that includes Cdk9 in its targets. It can inhibit RNA polymerase II phosphorylation and the subsequent transcription process.

CR8, (S)-Isomer

1084893-56-0sc-311307
5 mg
$201.00
(0)

CR8, the (S)-isomer, exhibits remarkable selectivity for Cdk9, characterized by its ability to stabilize an inactive conformation of the enzyme. This stabilization is achieved through unique hydrophobic interactions and van der Waals forces with critical amino acid side chains. The compound's kinetic behavior indicates a slow dissociation rate, enhancing its efficacy in modulating Cdk9 activity. Additionally, CR8 influences downstream signaling pathways by altering the phosphorylation status of target proteins, thereby affecting cellular homeostasis.

Dinaciclib

779353-01-4sc-364483
sc-364483A
5 mg
25 mg
$247.00
$888.00
1
(0)

Dinaciclib is a potent CDK inhibitor with activity against Cdk9. By inhibiting Cdk9, it can prevent the phosphorylation of RNA polymerase II and transcription elongation.

Cdk2/9 Inhibitor Inhibitor

507487-89-0sc-221411
5 mg
$416.00
1
(0)

Cdk2/9 Inhibitor demonstrates a distinctive mechanism of action by selectively binding to the ATP-binding pocket of Cdk9, leading to a conformational shift that inhibits its kinase activity. This compound engages in specific hydrogen bonding and electrostatic interactions with key residues, resulting in a prolonged inhibition effect. Its unique reaction kinetics reveal a non-competitive inhibition profile, allowing for nuanced modulation of transcriptional regulation and cellular processes.

R547

741713-40-6sc-364596
sc-364596A
2 mg
5 mg
$375.00
$395.00
(0)

R-547 is a pan-CDK inhibitor that targets multiple CDKs, including Cdk9. This can result in the inhibition of RNA polymerase II phosphorylation.

PHA-793887

718630-59-2sc-364580
sc-364580A
5 mg
10 mg
$189.00
$432.00
(0)

PHA-793887 inhibits various CDKs, including Cdk9. Its inhibition can disrupt transcription elongation by blocking Cdk9 activity.