反应详情

Promega ADP-Glo Max assay kit (Cat. No. V7002) was utilized to determine IC50 values for α, β, δ and γ isoforms of human Class I PI3 kinases (Millipore). Samples of kinase (20 nM α or δ, 40 nM β or γ isoform) were incubated with compound for 15 minutes at room temperature in reaction buffer (15 mM HEPES pH 7.4, 20 mM NaCl, 1 mM EGTA, 0.02% Tween 20, 10 mM MgCl2, 0.2 mg/mL bovine-γ-globulins) followed by addition of ATP/diC8-PtdInsP mixture to give final concentrations of 3 mM ATP and 500 uM diC8-PtdInsP. Reactions were incubated at room temperature for 2 hours followed by addition of 25 uL of stop solution. After a 40-minute incubation at room temperature, 50 uL of Promega detection mix was added followed by incubation for 1 hour at room temperature. Plates were then read on Envision plate reader in luminescence mode. Data was converted to % inhibition using the following equation below: