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| | Enzyme Assay |
| Description: | All rate-based assays were performed in black 384-well polypropylene polymerase chain reaction (PCR) microplates (Abgene) in a total volume of 30 μL. Substrate 4-methylumbelliferyl butyrate (4MU-B; Sigma) and either purified mutant MGL (mut-MGLL 11-313 L179S L186S) or purified wild type MGL (wt-MGLL 6H-11-313) were diluted separately into 20 mM PIPES buffer (pH=7.0), containing 150 mM NaCl and 0.001% Tween 20. Compounds of formula (I) were pre-dispensed (50 nL) into the microplate using a liquid handling dispenser prior to adding 4MU-B (25 μL of 1.2× solution to a final concentration of 10 μM) followed by enzyme (5 μL of a 6× solution to a final concentration of 5 nM) to initiate the reaction. Final compound concentrations ranged from 17 to 0.0003 μM. The fluorescence change due to 4MU-B cleavage was monitored with excitation and emission wavelengths of 335 and 440 nm, respectively, and a bandwidth of 10 nm (Safire2, Tecan) at 37° C. for 5 min. |
| Affinity data for this assay | |
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