| Assay Method Information | |
| | Inhibition Kinase Assay |
| Description: | Inhibition of CHK-1 kinase or percent inhibition at defined concentrations was determined by TR-FRET assay. Kinase reactions were performed in a 20 μL volume in low-volume 384-well plates (Cat #Corning 4511). The concentration of substrate Fluorescein-CREBtide was maintained at 0.2 μM in the assay, and the kinase reaction buffer consisted of 50 mM HEPES pH 7.5, 0.01% BRIJ-35, 10 mM MgCl2, 1 mM EGTA. Serially diluted compounds (3-fold) in DMSO (0.5% in final reaction) were incubated with cocktail of CHK-1 kinase (6 nM; Cat #PR3959B, ThermoFisher), Fluorescein-CREBtide (0.2 μM; Cat #PV3508, ThermoFisher), ATP (15 μM; Cat #A1852, Sigma), and kinase reaction buffer. After 1 hour kinase reactions at room temperature, 10 μL of Detection mix (8 nM LanthaScreen® Tb-CREB [pSer133] antibody, Cat #PV3542, ThermoFisher with 20 mM EDTA in TR-FRET Buffer, Cat #PV3574, ThermoFisher) was added, and the plate was read with a plate reader (Synergy™ NEO; Biotek) for TR-FRET. |
| Affinity data for this assay | |
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