| Assay Method Information | |
| | Enzymatic Assay |
| Description: | For each test compound, 100× concentrated DMSO solutions at 8 doses were prepared and then diluted in assay buffer (25 mM Tris-HCl, pH 8, 130 mM NaCl, 0.05% Tween-20, 10% Glycerol) to obtain 5× concentrated solutions in relation to the final concentrations (typical final concentration range—6.4-200000 nM or 0.18-50000 nM, final DMSO content—1%). Then 10 μL solution of each test compound concentration were placed on a 96-well plate in triplicate and 15 μL of 3.33× concentrated enzyme solution in the assay buffer containing 3.33× concentrated BSA (final BSA concentration 1 mg/mL) and, in case of HDAC6, 3.33× concentrated TCEP (final TCEP concentration—200 μM) were added to each well. After a period of preincubation at 25° C. (30 minutes for HDAC6 and 120 minutes for HDAC1), 25 μL of solution containing the substrate were added. As substrate, FLUOR DE LYS® deacetylase substrate (Enzo Life Sciences, cat: BML-KI104, FdL), FLUOR DE LYS®-Green substrate (Enzo Life Sciences, cat: BML-KI572, FdL_G) or Boc-Lys(Tfa)-AMC (Bachem, cat: 4060676.005, Tfal)—2× concentrated solution in assay buffer were used. Following a reaction period (30 minutes at 25° C.), 50 μL of the development solution consisting of concentrate FLUOR DE LYS® developer I (Enzo Life Sciences, ca: BML-KI105), diluted 200 times in buffer (50 mM Tris-HCl, pH 8, 137 mM NaCl, 2.7 mM KCl, 1 mM MgCl2) plus 2 μM TSA was added and, after 25 minutes at room temperature in the dark, using the Victor 1420 Multilabel Counter Perkin Elmer Wallac instrument. |
| Affinity data for this assay | |
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