| Assay Method Information | |
| | Reporter Displacement Assay |
| Description: | HDAC2 containing a C-terminal HIS-Tag (Proteros) and fluorescently-labeled anti-HIS-antibody are diluted in one vial in assay buffer 50 mM Tris, pH 8.0, 1 mM DTT, 150 mM NaCl, and 0.01% Tween20. Components are pre-incubated for 30 min, then a small volume of reporter probe (Proteros) is added from a highly concentrated stock and incubation is continued for another 30 min. Final concentrations after adding the reporter probe amount to 20 nM HDAC2, 4 nM antibody, and 180 nM probe.Ten μl/well of pre-formed complex are transferred into 384 well assay plates (Corning). Compounds to be profiled are serially diluted from 1×101-5.7×105 mM in DMSO and 60 nl are added to assay plates by pintool transfer (CybiWell, Cybio). Fluorescence intensity signal is read after 4 hours in a Pherastar FS (BMG Labtech) at 337/665 nm.For Kd determination, percent probe displacement values are calculated for each compound concentration and plotted against the compound concentration. IC50-like values (corresponding to 50% probe displacement) are calculated using standard fitting algorithms. Since the reporter probe is used at a concentration reflecting its own Kd value, compound Kd values can be calculated according to the Cheng Prusoff equation. |
| Affinity data for this assay | |
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