| Assay Method Information | |
| | Biochemical PIK3CA Kinase Assa |
| Description: | Compounds to be assayed were plated in 16 doses of 1:2 serial dilutions (20 nL volume each well) on a 1536-well plate, and the plate warmed to room temperature. PIK3CA enzyme (e.g. H1047R, E542K, E545K, or wild-type) (1 μL of 2 nM solution in Enzyme Assay Buffer (comprising 50 mM HEPES pH 7.4, 50 mM NaCl, 6 mM MgCl2, 5 mM DTT and 0.03% CHAPS)) was added and shaken for 10 seconds and preincubated for 30 minutes. To the well was added 1 μL of 200 μM ATP and 20 μM of diC8-PIP2 in Substrate Assay Buffer (50 mM HEPES pH7.4, 50 mM NaCl, 5 mM DTT and 0.03% CHAPS) to start the reaction, and the plate was shaken for 10 seconds, then spun briefly at 1500 rpm, and then incubated for 60 minutes at room temperature. The reaction was stopped by adding 2 μL of ADP-Glo reagent (Promega), and spinning briefly at 1500 rpm, and then incubating for 40 minutes. ADP-Glo Detection reagent (Promega) was added and the plate spun briefly at 1500 rpm, then incubated for 30 minutes. The plate was read on an Envision 2105 (Perkin Elmer), and the IC50 values were calculated using Genedata software. |
| Affinity data for this assay | |
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