Chemi-Verse™ CDK9/CyclinT Kinase Assay Kit
The Chemi-Verse™ CDK9/CyclinT Kinase Assay Kit is designed to measure CDK9 (cyclin dependent kinase 9)/Cyclin T kinase activity for screening and profiling applications using ADP-Glo™ as a detection reagent. The assay kit comes in a convenient 384-well format, with enough purified recombinant CDK9/Cyclin T kinase, kinase substrate, ATP, and kinase assay buffer for 400 enzyme reactions.
- ADP-Glo™ Kinase Assay (Promega #V6930)
- DTT (Dithiothreitol), 1M, optional
- Microplate reader capable of reading luminescence
- Adjustable micropipettor and sterile tips
- 30°C incubator
| Catalog # | Name | Amount | Storage |
| 40307 | CDK9/CyclinT, GST-Tag* | 2 x 10 µg | -80°C |
| 79334 | 5x Kinase Buffer 1 | 2 x 1.5 ml | -20°C |
| 79686 | 500 µM ATP | 200 µl | -20°C |
| 79604 | 5x CDK Substrate Peptide 2 | 2 x 1 ml | -20°C |
| 79969 | White 384-well plate | 1 | Room Temp |
*The concentration of the protein is lot-specific and will be indicated on the tube.
Cyclin-dependent kinase 9 (CDK9) is the catalytic subunit of the positive transcription elongation factor b (P-TEFb) complex, which phosphorylates the C-terminal domain of RNA polymerase II, a key player in the production of mature RNA. P-TEFb also includes cyclin T. CDK9 translocates to the nucleus once it gets auto phosphorylated, where it can associate with cyclin T. Hyperactivation of cyclins is known to result in cancer and the development of resistance to therapy, and CDK9-cyclin T is involved in the transcription of oncogenes. The inhibition or degradation of specific CDK-cyclin complexes could prove beneficial in cancer treatment, but the development of specific inhibitors has been difficult. Recently a small molecule degrader specific for CDK9-cyclin T was identified, LL-K9-3, which resulted in lower levels of androgen receptor (AR) and cMyc in 22RV1 cells. LL-K9-3 thus seemed more effective than SNS032, its parental CDK9 inhibitor, and the CDK9 PROTAC Thal-SNS032. Further research into new and more specific molecules will prove beneficial for cancer therapy.
Napolitano G, et al., 2003 J Cell Physiol. 197(1):1-7.
Li J., et al., 2022 J Med Chem. 65(16):11034-11057.
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