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Assay Method Information

Assay Name:  Kinase-Glo luminescent kinase assay
Description:  To determine the IC50 of compounds of the invention, recombinant eEF2K was diluted in an assay buffer in the presence of calmodulin, a calcium-binding messenger protein expressed in eukaryotic cells, and incubated with peptide substrate Ac-RKKYKFNEDTERRRFL in the presence of Adenosine-5′-triphosphate (ATP) and the test compound. The peptide substrate is efficiently and specifically phosphorylated by eEF2K at a single substrate concentration of 100 μM. Using this peptide, eEF2K activity can be quantitatively determined using a Kinase-Glo luminescent kinase assay kit (Promega) that measures ATP consumption by EF2K during phosphorylation of the substrate. ATP conversion was recorded using Perkin-Elmer Victor Luminometer. Data was plotted using GraphPad software and IC50 was calculated using 3-parameter sigmoidal curve fit. FIG. 1 shows the dose-response curve of Compound 35 calculated using this method.
Affinity data for this assay
 

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Last update November 1, 2007
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