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Assay Method Information |
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| | Kinase Assay |
| Description: | The ability of compounds of Formula I to inhibit mTOR was determined in a radioactive filtration assay that measures the transfer of radiolabeled phosphate from [gamma-33P]ATP to the protein substrate 4E-BP1. Compounds were first prepared at 50x the top dose of 10,000 nM and serially diluted 3-fold in DMSO to give ten dose dilution series. Assays were conducted in 96-well polypropylene U-bottom plates in 40 uL (final volume) assay mixtures that contained 50 mM K+HEPES, pH 7.5, 1 mM EGTA, 0.005% Tween-20, 10 mM MnCl2, 2.5 mM DTT, 2% DMSO (final concentration with compound), 10 uM [gamma-33P]ATP (50 uCi/mL), 5 uM 4E-BP1 and 5 nM mTOR, which was added last to initiate the assay. Each plate contained appropriate high (uninhibited) and low (prequenched) controls as well as a reference compound. Incubations were carried out at 22 C. for 45 minutes, after which the reaction was stopped by the addition of 100 uL aliquots of 25% TCA. |
| Affinity data for this assay | |
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