| Assay Method Information | |
| | Inhibition Assay |
| Description: | Human recombinant GSK-3β was purchased from Millipore (Millipore Iberica S.A.U.) The prephosphorylated polypeptide substrate was purchased from Millipore (Millipore Iberica SAU). Kinase-Glo Luminescent Kinase Assay was obtained from Promega (Promega Biotech Iberica, SL). ATP and all other reagents were from Sigma-Aldrich. Assay buffer contained 50 mM 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) (pH 7.5), 1 mM ethylenediaminetetraacetic acid (EDTA), 1 mM ethylene glycol tetraacetic acid (EGTA), and 15 mM magnesium acetate. The method developed by Baki was followed [Baki et al. Assay and Drug Development Technologies 2007, 5(1),75-83] to analyze the inhibition of GSK-3β. Kinase-Glo assays were performed in assay buffer using white 96-well plates. In a typical assay, 10 μL (10 μM) of test compound (dissolved in DMSO at 1 mM concentration and diluted in advance in assay buffer to the desired concentration) and 10 μL (20 ng) of enzyme were added to each well followed by 20 μL of assay buffer containing 25 μM substrate and 1 μM adenosine triphosphate (ATP). The final DMSO concentration in the reaction mixture did not exceed 1%. After a 30 minutes incubation at 30° C., the enzymatic reaction was stopped with 40 μL of Kinase-Glo reagent. Glow-type luminescence was recorded after 10 minutes using a Fluoroskan Ascent multimode reader. |
| Affinity data for this assay | |
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