Polyamines inhibit the yeast histone deacetylase.

Area of Science:

• Biochemistry
• Molecular Biology
• Yeast Genetics

Background:

• Histone deacetylases (HDACs) regulate gene expression through deacetylation.
• n-Butyrate is a known HDAC inhibitor in higher eukaryotes but its effect on yeast is unknown.
• Spermine and spermidine are polyamines with potential roles in cellular processes.

Purpose of the Study:

• To investigate the efficacy of n-butyrate as a yeast HDAC inhibitor.
• To identify alternative inhibitors of yeast histone deacetylase.
• To assess the impact of identified inhibitors on histone acetylation.

Main Methods:

• Enzyme inhibition assays using Saccharomyces cerevisiae histone deacetylase.
• Testing of n-butyrate, spermine, and spermidine as potential inhibitors.
• Histone acetylation assay using [3H]acetate and yeast nuclear extracts.

Main Results:

• n-Butyrate showed minimal inhibition of yeast histone deacetylase.
• Spermine and spermidine demonstrated significant inhibition of yeast histone deacetylase at 2 mM and 5 mM, respectively.
• Spermine treatment led to a substantial increase in histone acetylation in yeast.

Conclusions:

• n-Butyrate is not an effective inhibitor of yeast histone deacetylase.
• Spermine and spermidine are potent inhibitors of yeast histone deacetylase.
• Spermine can be utilized to study histone acetylation in yeast.