| Assay Method Information | |
| | Enzymatic Kinase Inhibition Assay 2 |
| Description: | The kinase inhibition IC50 was determined at Reaction Biology Corporation (www.reactionbiology.com, Malvern, Pa.) following the procedures described in the reference (Anastassiadis T, et al Nat Biotechnol. 2011, 29, 1039). Specific kinase/substrate pairs along with required cofactors were prepared in reaction buffer; 20 mM Hepes pH 7.5, 10 mM MgCl2, 1 mM EGTA, 0.02% Brij35, 0.02 mg/ml BSA, 0.1 mM Na3VO4, 2 mM DTT, 1% DMSO (for specific details of individual kinase reaction components see Supplementary Table 2). Compounds were delivered into the reaction, followed 20 minutes later by addition of a mixture of ATP (Sigma, St. Louis Mo.) and 33P ATP (Perkin Elmer, Waltham Mass.) to a final concentration of 10 μM. Reactions were carried out at room temperature for 120 min, followed by spotting of the reactions onto P81 ion exchange filter paper (Whatman Inc., Piscataway, N.J.). Unbound phosphate was removed by extensive washing of filters in 0.75% phosphoric acid. After subtraction of background derived from control reactions containing inactive enzyme, kinase activity data was expressed as the percent remaining kinase activity in test samples compared to vehicle (dimethyl sulfoxide) reactions. IC50 values and curve fits were obtained using Prism (GraphPad Software). |
| Affinity data for this assay | |
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