Abstract
Resveratrol, a small molecule found in red wine, is reported to slow aging in simple eukaryotes and has been suggested as a potential calorie restriction mimetic. Resveratrol has also been reported to act as a sirtuin activator, and this property has been proposed to account for its anti-aging effects. We show here that resveratrol is a substrate-specific activator of yeast Sir2 and human SirT1. In particular, we observed that, in vitro, resveratrol enhances binding and deacetylation of peptide substrates that contain Fluor de Lys, a non-physiological fluorescent moiety, but has no effect on binding and deacetylation of acetylated peptides lacking the fluorophore. Consistent with these biochemical data we found that in three different yeast strain backgrounds, resveratrol has no detectable effect on Sir2 activity in vivo, as measured by rDNA recombination, transcriptional silencing near telomeres, and life span. In light of these findings, the mechanism accounting for putative longevity effects of resveratrol should be reexamined.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Antioxidants / pharmacology*
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Binding, Competitive
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DNA, Ribosomal / chemistry
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DNA, Ribosomal / metabolism
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Dose-Response Relationship, Drug
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Fungal Proteins / chemistry
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Gene Silencing
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Histone Deacetylase Inhibitors
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Histone Deacetylases / chemistry*
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Humans
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In Vitro Techniques
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Kinetics
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Models, Chemical
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Niacinamide / chemistry
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Peptides / chemistry
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Protein Binding
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Recombination, Genetic
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Resveratrol
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Silent Information Regulator Proteins, Saccharomyces cerevisiae / antagonists & inhibitors
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Silent Information Regulator Proteins, Saccharomyces cerevisiae / metabolism
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Sirtuin 1
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Sirtuin 2
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Sirtuins / antagonists & inhibitors*
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Sirtuins / chemistry*
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Stilbenes / pharmacology*
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Substrate Specificity
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Telomere / metabolism
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Time Factors
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Transcription, Genetic
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Tumor Suppressor Protein p53 / metabolism
Substances
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Antioxidants
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DNA, Ribosomal
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Fungal Proteins
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Histone Deacetylase Inhibitors
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Peptides
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Silent Information Regulator Proteins, Saccharomyces cerevisiae
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Stilbenes
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Tumor Suppressor Protein p53
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Niacinamide
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SIR2 protein, S cerevisiae
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SIRT1 protein, human
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Sirtuin 1
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Sirtuin 2
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Sirtuins
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Histone Deacetylases
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Resveratrol