Assay Method Information |
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| p70S6K Enzyme Assay |
Description: | p70S6K inhibitor compounds were diluted and plated in 96 well plates. A reaction mixture including the following components were then added to the compound plate to initiate the enzyme reaction: p70S6K (3 nM, T412E mutant, Millipore) was mixed with 24 μM ATP in an assay buffer containing 100 mM Hepes (pH 7.5), 5 mM MgCl2, 1 mM DTT, 0.015% Brij and 1 μM of the substrate peptide FITC-AHA-AKRRRLSSLRA-OH (derived from the S6 ribosomal protein sequence, FITC=fluorescein isothiocyanate, AHA=6-aminohexanoic acid). The reaction was incubated for 90 min at 25° C., before the addition of 10 mM EDTA to stop the reaction. The proportion of substrate and product (phosphorylated) peptide was analyzed on a Caliper Life Sciences Lab Chip 3000, using a pressure of −1.4 psi, and upstream and downstream voltages of −3000 and −700, respectively. Product peaks were resolved before substrate peaks on the resulting chromatograms. To assess the inhibitory potential of the compounds, IC50 values were determined, as shown above. |
Affinity data for this assay | |
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