Assay Method Information

Assay Name:  FRET Assay
Description:  Compound screening was done via the following method. 10 mM stock solution of test compound in DMSO was prepared by dissolving test compound in DMSO at RT for 1 hour, and then sonicating at 100% output for 8 minutes. If compound is not soluble under this condition, it was diluted to 3 mM. Kinase reaction buffer was prepared containing 10 mM MgCl2, 50 mM HEPES, 1 mM EGTA, 0.01% TWEEN-20, 2 mM DTT. Serial dilutions of the test compounds were prepared at 4× final assay concentrations using Freedom EVO200 dispensing system as follows: 12×10−5 M, 4×10−5 M, 1.33×10−5 M, 4.44×10−6 M, 1.48×10−6 M, 4.92×10−7M, 1.65×10−7 M, 5.48×10−7 M, 1.82×10−8 M, 6.09×10−9, 2.03×10−9 M. Test compounds (2.5 μl at 4× the final assay concentration) was added to wells using Freedom EVO200 dispensing system. As a positive control, 2.5 μl of positive compound was added to assay wells, and 2.5 μl of DMSO to assay wells as vehicle control. Kinase solution was prepared in reaction buffer at 2× final assay concentration. Kinase solution (5 μl) was added to each well of the assay plate. The substrate and ATP solution was prepared in kinase reaction buffer at 4× final assay concentration. The kinase reaction was started by adding 2.5 μl of substrate+ATP mix solution to each well of the assay plate. The plate is mixed on a plate shaker; then covered and allowed to react for 2 hours in the dark at 25° C. without shaking. The reaction was stopped by adding 5 μl of stop solution to each test well followed by mixing and incubation at RT for 10 minutes in the dark. 5 μl of detection mix (detection antibody diluted in detection buffer) was added; the contents of the plate were mixed and then incubated in the dark for 1 hour at RT. The signal was recorded at TR-FR ET mode (665 nm/615 nm).
Affinity data for this assay
 

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