| Assay Method Information | |
| | Phosphatase Activity Inhibition Assay (Determination of IC50) |
| Description: | (a) The positive control SHP099 was prepared according to the reported literature (J Med Chem 2016, 59 (17), 7773-82); and the positive control TNO155 was prepared according to the reported literature.(b) 6,8-difluoro-4-methylumbelliferyl phosphate (DiFMUP) was used as the reaction substrate, and a solution of full-length SHP2 (Metl-Arg 593) (diluted to 0.5 nM in the reaction solution) and the peptide H2N-LN(PY)IDLDLV(dPEG8)LST(pY)ASINFQK-amide were incubated together in the reaction solution (60 mM 3,3-4-(2-hydroxyethyl)-1-piperazinethanesulfonic acid (HEPES), pH=7.2, 75 mM NaCl, 75 mM KCl, 1 mM EDTA, 0.05% Tween-20, 5 mM dithiothreitol (DTT)) for 30 to 60 minutes to activate the SHP2, and DMSO (1% (V/V) or the compound (10 μM to 0.1 nM) was added to the mixture, and the incubation continued at room temperature for 20 minutes. DiFMUP (25 μM, the total volume of the reaction solution was 50 μL) was added, and the reaction started. The fluorescence intensity of the reaction solution was detected by using the Envision multifunctional microplate reader (PerkinElmer) (Excitation light 355 nm, emission light 460 nm). Three duplicate wells were set for each dose. The fluorescence value of the control well (DMSO) was set to 100%. |
| Affinity data for this assay | |
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