CHEMBL5735671

Kinase Assay: Radioisotope assays were performed for the evaluation of the kinase target profiling and all assays were performed in a designated radioactive working area. The kinase targets were RSK1, RSK2, RSK3, RSK4 and MK2. The kinase assays (in duplicate) were performed at 30° C. for 15 minutes in a final volume of 25 μL according to the following assay reaction recipe: Component 1: 5 μL of diluted active kinase target (100 ng per reaction) Component 2: 5 μL of peptide substrate (0.5 μg per reaction) (for RSK1, RSK2, RSK3 and RSK4, RSK S6K substrate was used; for MK2, HSP27tide was used) Component 3: 5 μL of kinase assay buffer Component 4: 5 μL of compound described herein (various concentrations: 0, 0.1, 1, 10, 100 or 1000 nM or 1, 3, 10, 30, 100, 300 nM) Component 5: 5 μL of 33P-ATP (5 μM stock solution, 0.8 μCi; 20 μM final concentration)The assay was initiated by the addition of 33P-ATP and the reaction mixture incubated at 30° C. for 15 minutes. After the incubation period, the assay was terminated by spotting 10 μL of the reaction mixture onto Multiscreen phosphocellulose P81 plate. The Multiscreen phosphocellulose P81 plate was washed 3 times for approximately 15 minutes each in a 1% phosphoric acid solution. The radioactivity on the P81 plate was counted in the presence of scintillation fluid in a Trilux scintillation counter.