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| | Inhibition Enzymatic Assay |
| Description: | Enzymatic assays were performed in the following reaction buffer: 50 mM HEPES, pH 7.4 containing 500 μg/ml bovine serum albumin. Enzyme activities were monitored by measuring the release of fluorescence of an amido methyl coumarin (AMC) moiety (excitation, 360 nm; emission, 441 nm) from Boc-Gln-Ala-Arg-AMC (50 μm) (Bachem Biosciences, King of Prussia, Pa.) for 20 min at 37° C. in a FLX-800 TBE microplate reader (Bio-Tek Instruments, Winooski, Vt.). Recombinant purified human matriptase (amino acids 596-855) (1 nM) was incubated with vehicle (1% DMSO) or 1 μM of inhibitors IN-1 (RQAR-ketobenzothiazole, Compound 1) and IN-2 (RQAK-ketobenzothiazole, compound 3) for 10 minutes at room temperature. Enzyme activity was measured for 20 minutes at 37° C. using 50 μM of Boc-Gln-Ala-Arg-AMC as a substrate. Reaction was performed in a 50 mM HEPES buffer (pH 7.4) containing 5 μg/ml BSA. |
| Affinity data for this assay | |
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