| Assay Method Information | |
| | CDK Enzymatic Assay |
| Description: | Enzyme was pre-incubated with compounds for 30 minutes (CDK1,2,4,6,9) or 60 minutes (CDK7, CDK12, CDK13) prior to addition of ATP and Ulight-peptide (1 mM and 50 nM final, respectively), in assay buffer containing 50 mM HEPES pH 7.5, 1 mM EGTA, 10 mM MgCl2, 2 mM DTT, 0.05 mg/mL BSA, and 0.01% Tween 20. The reaction was then incubated for 60-90 minutes at room temperature. The reactions were stopped by the addition of EDTA and Europium labeled antibody, for a final concentration of 15 mM and 1.0-1.5 nM, respectively. HTRF signals were read after 15-120 minutes. A ratio of fluorescence transferred to the labeled substrate (665 nm) relative to fluorescence of the Europium donor (620 nm) represents the extent of phosphorylation. Ratios for treated wells were normalized to DMSO only (100% activity) and no enzyme (0% activity) controls. |
| Affinity data for this assay | |
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