CHEMBL5735201

In Vitro Kinase Assay: For Echo dosing the solvent was 100% DMSO. A master plate was prepared with 40 ul of 10 mM stock from our Primary Liquid Store in quadrant 1 of a Labcyte 384 well plate. A 1 in 100 dilution was made from quadrant 1 into quadrant 2 by removing 0.4 ul and adding it to 39.6 ul of DMSO. Subsequent 1 in 100 dilutions were made into quadrant 3 from quadrant 2 and quadrant 4 from quadrant 3.Multiple 2.5 nl droplets were dispensed from each quadrant of the master plate using ECHO dosing technology (Labcyte Inc. Sunnyvale, Calif., USA) to generate the dose range that was required in the test. The dose range most commonly used was as follows: 100 uM, 30 uM, 10 uM, 3 uM, 1 uM, 0.3 uM, 0.1 uM, 0.03 uM, 0.01 uM, 0.003 uM, 0.001 uM, 0.0001 uM. Each well was backfilled with Dimethyl Sulphoxide (DMSO) to a total volume of 120 nl, such that when the enzyme and substrate mix was added the final DMSO concentration was 1%. DMSO was added to max control wells as 120 nl, minimum control wells were treated with 120 nl of compound at a concentration that inhibited the enzyme activity 100%.Following addition of compound or control to the assay plate, 6 μl peptide mix containing 3 μM substrate (5-FAM-GRPRTSSFAEG-CONH2; CRB) and 40 μM ATP in Kinase base buffer (100 mM Hepes pH 7.5, 0.015% Brij-35) and 6 μl enzyme mix containing 8 nM AKT1/PKBα active enzyme (Upstate Biotechnology, Cat No. 14-276), 8 mM DTT and 20 mM MgCl2 in kinase base buffer was added. All buffers were made up with 18MΩ water. The plates were sealed and incubated at room temperature for 50 minutes. The reaction was stopped by the addition of 10 μl stop buffer (100 mM Hepes pH 7.5, 0.015% Brij-35 solution, 0.1% coating reagent #3, 40 mM EDTA, 5% DMSO) to each well (N.B. plates can be frozen after stopping and read later).