Assay Method Information
Assay Name:  DGKα Biochemical Activity Assay
Description:  Table 6: Alternatively, the enzymatic activity of human DGKα was monitored in a biochemical assay in the presence or absence of compounds and using micelles containing 18:1 Diacylglycerol (DAG), 16:0-18:1 PS (POPS) and Octylglucoside as substrate. DGKα activity led to conversion of DAG and ATP to Phosphatidic Acid (PA) and ADP. Levels of ADP were monitored by bioluminescence using the ADP-Glo Kinase Assay (Promega) and were indicative of DGKα activity.Ten nanoliters of test compound dissolved in DMSO at various concentrations were dispensed into a 384-well low volume nonbinding service white plates (Corning #3824) using a Labcyte Echo instrument. Recombinant DGKα (Carna Biosciences) in assay buffer (5 μL in 50 mM MOPS [3-(N-morpholino) propanesulfonic acid], pH 7.2; 0.0025% Triton X-100; 1 mM dithiothreitol; 5 mM MgCl2, 200 μM ATP) was added to the compound-containing plate and was incubated for 15 minutes at 25° C. A substrate solution (5 μL in 1.7 mM 1,2-dioleoyl-sn-glycerol [18:1 DAG], 13.5 mM 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-L-serine [16:0-18:1 PS](POPS), 2 μM CaCl2, 100 mM Octylglucoside (OG), 1 mM DTT) (obtained from Carna Biosciences) diluted in DGK ALPHA assay buffer was then added to start the reaction. Final concentrations were 1 nM DGKα, 100 μM ATP, 1 μM calcium chloride, 0.85 mM 1,2-dioleoyl-sn-glycerol (18:1 DAG), 6.75 mM 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-L-serine (16:0-18:1 PS) (POPS), 1 μM CaCl2, 50 mM Octylglucoside (OG) and 5 mM MgCl2. The reaction mixture was incubated at 25° C. for 1 hour. ADP-Glo Reagent (10 μL, 10 mM Mg added) provided by the kit was added to each well and incubated at 25° C. for 40 minutes. Then, 20 μL of Kinase Detection Reagent was added and incubated at 25° C. for 40 minutes. Luciferase activity of each well was measured via luminescence on an Envision plate reader (PerkinElmer).
Affinity data for this assay
 
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