| Assay Method Information | |
| | Enzyme Activity |
| Description: | Primary reaction buffer solution: 20 mM Hepes (pH 7.5), 10 mM MgCl2, 1 mM EGTA, 0.02% Brij35, 0.02 mg/ml BSA, 0.1 mM Na3VO4, 2 mM DTT, 1% DMSOTreatment of the Compound:The tested compounds were formulated into a 10 mM stock solution in DMSO, diluted in 3-fold gradient for a total of 10 concentrations, and placed in a 384-well plate (Cyclic Olefin Copolymer LDV Echo ).Kinase Name: ASK1/MAP3K5 (Invitrogen, Carlsbad, Calif.)Type: Recombinant Human Full Length Protein, GST-taggedFinal reaction concentration of the enzyme: 20 nMSubstrate: Myelin basic protein, MBP (Active Motif, Carlsbad, Calif.)Final reaction concentration of the substrate: 20 μMExperimental Procedures:1. The substrate was dissolved in a freshly prepared primary reaction buffer solution,2. The desired coenzyme factor was added to the above substrate solution,3. The kinase was added to the substrate solution and mix gently,4. The solution tested compound in DMSO was added to the kinase reaction solution and incubated at room temperature for 20 minutes.5. The reaction was initiated by adding 33P-ATP (specific activity 10 μCi/μL) to the reaction solution.6. Incubated at room temperature for 2 hours.7. A small portion of the reactants were placed onto the P-81 ion exchange filter paper.8. The filter paper was washed three times with 0.75% phosphate buffer to wash away unbound phosphate, and then dried.9. The radioactivity remaining on the filter paper was determined,10. The data for the kinase activity was expressed as the ratio of the kinase activity remaining in the test sample to the kinase activity in the vehicle (DMSO). |
| Affinity data for this assay | |
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