Abstract

Histone deacetylase enzymes (HDACs) are potential targets for the treatment of cancer and other diseases, but it is challenging to design isoform-selective agents. In this work, we created new analogs of two established but non-selective HDAC inhibitors. We decorated the central linker chains of the molecules with specifically positioned fluorine atoms in order to control the molecular conformations. The fluorinated analogs were screened against a panel of 11 HDAC isoforms, and minor differences in isoform selectivity patterns were observed.

Highlights

  • Histone deacetylases (HDACs) are important enzymes whose functions include the regulation of gene expression [1]

  • Histones are post-translationally modified to contain acetyl groups on the ε-amino groups of some surface lysine residues; HDACs can catalyze the removal of these acetyl groups, thereby altering how tightly DNA winds around the histone, which in turn affects gene expression

  • HDAC isoforms that an aromatic capping group that binds at the surface of the enzyme; a linker ch have narrow tunnels (e.g., HDAC1–3) are challenging to target through variation of the penetrates through a tunnel leading into interior of the enzyme; linker

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Summary

Introduction

Histone deacetylases (HDACs) are important enzymes whose functions include the regulation of gene expression [1]. Figure 1) [3] and Scriptaid (7) [4] These inhibitors share three key features: an aromatic capping group that binds at the surface of the enzyme; a linker chain that penetrates through a tunnel leading into the interior of the enzyme; and a zinc-binding group that coordinates to a metal cofactor in the enzyme’s deeply buried active site. HDAC isoforms that an aromatic capping group that binds at the surface of the enzyme; a linker ch have narrow tunnels (e.g., HDAC1–3) are challenging to target through variation of the penetrates through a tunnel leading into interior of the enzyme; linker [8] because slim linkers usually fit not just thethe narrow-tunneled.

The known
Synthesis
Reagents and conditions
Conformational Analysis
In order to validate thethe resulting relative
Conformational analysis ofand
HDAC Inhibition
HDAC inhibitory of Scriptaid
Conclusions

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