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Assay Method Information |
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| | HotSpot Assay |
| Description: | The HotSpot assay platform was used to measure kinase/inhibitor interactions as described in Anastassiadis et al., Nat Biotechnol. 29:1039-45, 2011. In brief, for each reaction, kinase and substrate were mixed in a buffer containing 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, and 1% DMSO. Compounds were then added to each reaction mixture. After a 20-min incubation, ATP (Sigma-Aldrich) and [γ-33P] ATP (PerkinElmer) were added at a final total concentration of 100 μM. Reactions were carried out at room temperature for 2 h and spotted onto P81 ion exchange cellulose chromatography paper (Whatman). Filter paper was washed in 0.75% phosphoric acid to remove unincorporated ATP. The percent remaining kinase activity relative to a vehicle-containing (DMSO) kinase reaction was calculated for each kinase/inhibitor pair. |
| Affinity data for this assay | |
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