Novel histone deacetylase 8 ligands without a zinc chelating group: Exploring an ‘upside-down’ binding pose

Bioorganic & Medicinal Chemistry Letters
2012.0

Abstract

A novel series of HDAC8 inhibitors without a zinc-chelating hydroxamic acid moiety is reported. Photoaffinity labeling and molecular modeling studies suggest that these ligands are likely to bind in an 'upside-down' fashion in a secondary binding site proximal to the main catalytic site. The most potent ligand in the series exhibits an IC(50) of 28 μM for HDAC8 and is found to inhibit the deacetylation of H4 but not α-tubulin in SH-SY5Y cell line.

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