| Assay Method Information | |
| | In Vitro Protein Activity Assay |
| Description: | The basic principle is: SHP2 as phosphatase can catalyze the dephosphorization of DiFMUP to form DiFMU and free phosphate groups. The product DiFMU emits fluorescence under 340 nm excitation, and 450 nm emission is collected. If the binding of small molecule compounds with SHP2 can inhibit the activity of SHP2 enzyme, the 450 nm emission light detected will be weakened, and the activity of SHP2 enzyme will be finally reflected by the intensity of fluorescence value.The specific operation was as follows: the 10 mM compound stock solution was diluted to 1 mM with DMSO, and then diluted 3 times with DMSO. 95 μL reaction buffer (60 mM HEPES), 75 mM NaCl, 75 mM KCl, 1 mM EDTA, 5 mM DTT, 1 μL gradient diluted compound, 2 μL SHP2 (concentration was 2 μg/μL) and 1 μL polypeptide (concentration was 50 mM) were added into each well of a 96 well flat clear bottom black plate (costar, 3603). The above test mixture was incubated at room temperature in dark for 60 minutes. Then 2 μL of 10 mM DiFMUP was added into each well, and was incubated at room temperature for 30 minutes. Fluorescence value was determined in the enzyme reader at Ex340/Em450. IC50 of the compounds was obtained by the data analysis software Prism. |
| Affinity data for this assay | |
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