| Assay Method Information | |
| | EGFR kinase assay |
| Description: | In vitro enzyme activity assay: wild-type and various mutants (T790M, L858R, L861Q, L858 R/T790M) EGFR, Z′-Lyte Kinase Assay Kit were purchased from Invitrogen. 10 concentration gradients, from 5.1×10−11 mol/L to 1.0×10−6 mol/L, were set for all of the compounds to be tested. Concentrations of different kinases were determined based on the optimization of experiment, and the corresponding concentrations were: EGFR (PV3872, Invitrogen) 0.287 μg/μL, EGFR-T790M (PV4803, Invitrogen) 0.174 μg/μL, EGFR-L858R (PV4128, Invitrogen) 0.054 μg/μL, EGFR-L858R/T790M (PV4879, Invitrogen) 0.055 μg/μL. Compounds were diluted for 3 times in DMSO from 5.1×10−9 M to 1×10−4 M. 4 μL of compound was dissolved in 96 μL of water, to give a 4× compound solution. 40 μM ATP was dissolved in 1.33× kinase buffer, and a kinase/peptide mixture comprising 2× kinase, 4 μM tyrosine and four peptides was prepared for use. 10 μL of kinase reaction system comprised 2.5 μL of compound solution, 5 μL of Kinase/peptide mixture, and 2.5 μL of ATP solution. 5 μL of phosphopeptide solution was used in place of kinase/peptide mixture as 100% phosphorylation control. 2.5 μL of 1.33× kinase buffer was used to replace ATP solution as 100% inhibition control, and 2.5 μL of 4% DMSO solution was used to replace compound solution as 0% inhibition control. After thoroughly mixing the solution within the plate, the plate was incubated at room temperature for 1.5 hours. 5 μL of DevelopmentSolution was added into each well, and then the plate was incubated at room temperature for another 1 hour, and non-phosphorylated peptide was cleaved within this period. Finally, the reaction was quenched by adding 5 μL of Stop Reagent. The Plate was measured with EnVision Multilabel Reader (Perkin Elmer). Experimental data were calculated by using GraphPad Prism version 4.0. |
| Affinity data for this assay | |
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