| Assay Method Information | |
| | In Vitro DGK Inhibition Assays |
| Description: | DGK α and ζ kinase use ATP to phosphorylate the substrate 1,2-dilauroyl-sn-glycerol (DLG, incorporated in the liposomes). ATP is converted to ADP as a result of this enzymatic reaction. After the kinase reaction, an ATP-depletion reagent is added to terminate the kinase reaction and deplete any remaining ATP, leaving only ADP. Second, a detection reagent is added to simultaneously convert ADP to ATP and allow the newly synthesized ATP to be converted to light using a coupled luciferase/luciferin reaction. A concentrated liposome solution was prepared in assay buffer without DTT and BSA: 2 mM of DLG in 21 mM of total liposome (2 mM DLG/8 mM PS/11 mM PC). The reaction mixtures contain the assay buffer with a final DLG concentration of 125 uM ATP concentrations of 25 μM (for DGKA assay) or 50 μM (for DGKZ assay). The reactions were started by addition of DGK α and ζ kinases at 4 nM and 2 nM final concentrations, respectively. After 1 hour reaction, the amount of ADP formed was detected with the ADP-Glo kinase assay (Promega) according to the manufacturer instructions. Compounds were added in 11-points dose response, starting at 10 mM, 1:3 dilutions, with a final DMSO concentration of 2%. The multidrop combi was used as a liquid handler and luminescence was read with 0.5 s by the envision reader (PE). |
| Affinity data for this assay | |
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