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Updated: Mar 17, 2026
Deacetylation Assays to Unravel the Interplay between Sirtuins SIRT2 and Specific Protein-substrates
Published on: February 27, 2016
Synthesis and Assay of SIRT1-Activating Compounds
H Dai1, J L Ellis1, D A Sinclair2
1Sirtuin DPU, GlaxoSmithKline (GSK), Collegeville, PA, United States.
Abstract:
The NAD(+)-dependent deacetylase SIRT1 plays key roles in numerous cellular processes including DNA repair, gene transcription, cell differentiation, and metabolism. Overexpression of SIRT1 protects against a number of age-related diseases including diabetes, cancer, and Alzheimer's disease. Moreover, overexpression of SIRT1 in the murine brain extends lifespan. A number of small-molecule sirtuin-activating compounds (STACs) that increase SIRT1 activity in vitro and in cells have been developed. While the mechanism for how these compounds act on SIRT1 was once controversial, it is becoming increasingly clear that they directly interact with SIRT1 and enhance its activity through an allosteric mechanism. Here, we present detailed chemical syntheses for four STACs, each from a distinct structural class. Also, we provide a general protocol for purifying active SIRT1 enzyme and outline two complementary enzymatic assays for characterizing the effects of STACs and similar compounds on SIRT1 activity.
Insights
Researchers detail the synthesis of four sirtuin-activating compounds (STACs) that enhance the activity of SIRT1, a protein linked to aging and disease. These compounds offer new tools for studying SIRT1
Area of Science:
- Biochemistry
- Molecular Biology
- Gerontology
Background:
- Sirtuin 1 (SIRT1), an NAD(+)-dependent deacetylase, is crucial for cellular functions like DNA repair, transcription, differentiation, and metabolism.
- Overexpression of SIRT1 demonstrates protective effects against age-related diseases such as diabetes, cancer, and Alzheimer's disease, and extends lifespan in mice.
- Small-molecule sirtuin-activating compounds (STACs) have been developed to boost SIRT1 activity in vitro and in cellular models.
Purpose of the Study:
- To present detailed chemical syntheses for four distinct structural classes of STACs.
- To provide a general protocol for the purification of active SIRT1 enzyme.
- To outline complementary enzymatic assays for characterizing STACs' effects on SIRT1 activity.
Main Methods:
- Detailed chemical synthesis of four STACs from diverse structural classes.
- Establishment of a general protocol for purifying active SIRT1 enzyme.
- Implementation of two complementary enzymatic assays to measure SIRT1 activity modulation by STACs.
Main Results:
- Successful synthesis of four novel STACs, each representing a unique chemical scaffold.
- A reproducible protocol for obtaining purified, active SIRT1 enzyme was established.
- Two enzymatic assays were optimized for characterizing the allosteric activation of SIRT1 by STACs.
Conclusions:
- The developed STACs and purification/assay protocols provide valuable tools for further research into SIRT1 function and therapeutic targeting.
- The findings support the direct allosteric interaction mechanism of STACs with SIRT1.
- This work facilitates the investigation of SIRT1's role in health, disease, and aging.
