| Assay Method Information | |
| | Biochemical DGK IC50 Assays |
| Description: | Enzymatic reactions of DGKζ, DGKα and DGKδ were performed using ADP-Glo assay with lipid micelle substrate. Full length DGK (in-house protein M1-V929 with SEQ ID No: 2) was expressed in baculovirus expression system. Full length DGKα (D21-10BG, SignalChem) and full length DGKδ (D23-10G, SignalChem) were purchased. Lipid micelle was prepared by dissolving DAG (Sigma, 317505-10MG) and PS (Sigma, P7769-100MG) with chloroform which was furtherly removed by rotary evaporation. The resulted product was resuspended in buffer containing 25 mM HEPES pH 7.0, 0.5 mM EDTA and 160 mM Octyl P-D glucopyranoside by vigorous mixing and ultrasonic (IID, Scientz). Final concentration in reaction. Enzyme (nM)ATP (μM)DAG (μM)DGKα 7.5 140 80DGKδ 10 140 80DGKζ 0.5 140 80[1096]. The inhibition activities testing for the compound disclosed herein were carried out at room temperature in assay buffer containing 50 mM HEPES, 10 mM MgCl2, 0.01% BSA, 0.1 mM Na3VO4, 0.005% Tween-20 and 0.01 mM CaCl2. Compounds in DMSO were dispensed into wells of a black 384 well plate (Corning 4514) using D300e digital dispenser (Tecan). The ranges of compounds final concentration were 1.55-10000 nM or 23.3-150000 nM. 3 μL 2× enzyme solution was added to wells. After incubation for 1 hour, 3 μL 2× substates solution containing 160 μM DAG and 280 μM ATP was added to the wells to initiate reaction. After 1 hour reaction, 5 μL ADP-Glo reagent (Promga V9101) was added and incubated for 40 minutes. 10 μL Kinase Detection reagent was added and incubated for 30 minutes. Luminescence was measured on a microplate reader (PHERAstar FSX, BMG labtech). The IC50s are calculated based on inhibition of enzyme activity in the presence of increasing concentrations of compounds. Selected compounds had no inhibitory activity on DGKδ. |
| Affinity data for this assay | |
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