In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
LDC000067 (LDC067) is a novel specific inhibitor of CDK9 with IC50 value of 44 ± 10 nM .
Cyclin-dependent kinase 9 (CDK9) is a cyclin-dependent kinase. CDK9 and cyclin T form the positive transcription elongation factor b (P-TEFb) complex for RNA polymerase II and functions by phosphorylating the C-terminal domain of the largest subunit of RNA polymerase II .
LDC000067 (LDC067) is a novel and highly specific CDK9 inhibitor. LDC000067 exhibited selectivity for CDK9 over other CDKs in the range of 55-fold (vs. CDK2) to over 230-fold (vs. CDK6 and CDK7). LDC067 also inhibited transcription in a dose-dependent and ATP-competitive manner. In whole cells, LDC000067 induced the tumor suppressor protein p53 activation and apoptosis. LDC000067 also selectively reduced short-lived mRNAs, including those that encode regulators of apoptosis and proliferation such as MYC and MCL1 .
. Albert TK, Rigault C, Eickhoff J, et al. Characterization of molecular and cellular functions of the cyclin-dependent kinase CDK9 using a novel specific inhibitor. Br J Pharmacol, 2014, 171(1): 55-68.
- 1. Azimi A, Caramuta S, et al. "Targeting CDK2 overcomes melanoma resistance against BRAF and Hsp90 inhibitors." Mol Syst Biol. 2018 Mar 5;14(3):e7858. PMID:29507054
- 2. Yuan J, Jiang YY, et al. "Super-Enhancers Promote Transcriptional Dysregulation in Nasopharyngeal Carcinoma." Cancer Res. 2017 Dec 1;77(23):6614-6626. PMID:28951465
|Storage||Desiccate at -20°C|
|Solubility||≥18.52mg/mL in DMSO|
|Shipping Condition||Evaluation sample solution : ship with blue ice.All other available size: ship with RT , or blue ice upon request|
|General tips||For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.|
|Kinase experiment :|
Kinase inhibition by LDC000067 was measured in a radio metric assay, which directly measured kinase catalytic activity towards a specific substrate. Briefly, 10 μM LDC000067 or DMSO as solvent control, were added to base reaction buffer (10 mM MgCl2, 1 mM EDTA, 20 mM HEPES pH 7.5, 2 mM DTT, 0.02 mg·mL-1 BSA, 0.1 mM Na3VO4, 0.02% Brij35, 1% DMSO), containing cofactors and substrates, which were required by the individual kinase. 10 μCi of [γ-33P]-APP (10mCi·mL-1, 3000Ci·mmol-1, Perkin Elmer) was added to the reaction mixture. And such kinase reaction incubated for 120min at room temperature. Reactions were found on P81 ion exchange paper, and filters generally washed in 0.75% phosphoric acid before radiometric quantification. Each protein kinase was measured in duplicate, and its catalytic activity expressed as residual kinase activity, which shows the percentage of average substrate phophorylation in contrast with the solvent control reaction.
|Cell experiment :|
HEK293T cells, THP1 cells
The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37℃ for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below -20℃ for several months.
Competitive kinase binding displacement assay: 90 min.DNA microarray analysis assay: 90 min.
LDC000067 inhibits CDK9 with an IC50 value of 44(10 nM, and its selectivity for CDK9 over other CDKs is in the range of 55-fold to over 230-fold, especially higher selectivity in an ATP-competitive kinase binding assay. Besides, effects of LDC000067 in whole cells contain induction of the tumour suppressor protein p53 and apoptosis. Moreover, gene expression profiling of cells treated with LDC000067 demonstrate selective reduction of short-lived mRNAs, which encode regulators of proliferation and apoptosis, such as MCL1 and MYC.
. T K Albert1, C Rigault1, J Eickhoff, K Baumgart, C Antrecht1, B Klebl, G Mittler and M Meisterernst. Characterization of molecular and cellular functions of the cyclin-dependent kinase CDK9 using a novel specific inhibitor. British Journal of Pharmacology. 2014, 171: 55–68.