Assay Method Information

Assay Name:  Inhibitory Activity Assay
Description:  The inhibitory activity of the test compounds against human ATR kinase was evaluated by measuring IC50 value.ATR/ATRIP (h) was incubated in detection buffer containing 50 nM GST-cMyc-p53 and Mg/ATP (10 μM). The reaction was initiated by adding Mg/ATP mixture. After incubation at room temperature for 30 minutes, the reaction was terminated by adding a termination solution containing EDTA. Finally, a detection buffer containing d2-labeled anti-GST monoclonal antibody and europium-labeled anti-phospho-Ser15 antibody against phosphorylated p53 were added. Plates were then read in time-resolved fluorescence mode for homogeneous time resolution.The fluorescence (HTRF) signal was determined according to the formula HTRF=10000×(Em665 nm/Em620 nm).
Affinity data for this assay
 

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