| Assay Method Information | |
| | Inhibition Assay |
| Description: | The following buffers were used: Activation buffer: 32.5 mM sodium acetate, adjusted to pH 3.5 with HCl; Assay buffer: 150 mM sodium acetate, 4mM EDTA, 20 mM L-Cysteine, adjusted to pH 5.5 with HCl,Assay conditions: To activate the proenzyme, 5 uLprocathepsin K were mixed with 1 ul activation buffer, and incubated at room temperature for 30 min. 5 uL test compound (final concentration 0.1 nM to 100 uM) in aqua bidest (containing 4% DMSO, final DMSO concentration 1%) were mixed with 10 uL of Cathepsin K in assay buffer (final concentration 2 ng/uL) and incubated for 10 min. Then 5 uL of substrate in assay buffer (final concentration 12.5 uM) were added. The plates were then incubated at room temperature for 60min. Then, the reaction was stopped by adding 10 uL of E64 in assay buffer (final concentration 1 uM). The fluorescence in the wells was determined using a Molecular Devices SpectraMax M5 Fluorescence Reader. |
| Affinity data for this assay | |
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