ArticleProtein science : a publication of the Protein Society2024
Inhibitory protein-protein interactions of the SIRT1 deacetylase are choreographed by post-translational modification.
Article in Protein science : a publication of the Protein Society, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 5 citations in OpenAlex.
- PACS2 at Mitochondria-Associated Membranes: A Central Regulator of Cardiovascular and Metabolic Diseases.Journal of cellular and molecular medicine · 2026Review
- Factors Determining Sirtuin-1 Target Engagement.Advanced biology · 2026Review
- Tumor antigen PRAME promotes melanoma growth by inactivating p53 through the SIRT1-DBC1 axis.Oncogene · 2025Article
- Review
- Inhibitory protein-protein interactions of the SIRT1 deacetylase are choreographed by post-translational modification.Protein science : a publication of the Protein Society · 2024Article
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15 authors at 3 institutions in 2 countries.
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Abstract
Regulation of SIRT1 activity is vital to energy homeostasis and plays important roles in many diseases. We previously showed that insulin triggers the epigenetic regulator DBC1 to prime SIRT1 for repression by the multifunctional trafficking protein PACS-2. Here, we show that liver DBC1/PACS-2 regulates the diurnal inhibition of SIRT1, which is critically important for insulin-dependent switch in fuel metabolism from fat to glucose oxidation. We present the x-ray structure of the DBC1 S1-like domain that binds SIRT1 and an NMR characterization of how the SIRT1 N-terminal region engages DBC1. This interaction is inhibited by acetylation of K112 of DBC1 and stimulated by the insulin-dependent phosphorylation of human SIRT1 at S162 and S172, catalyzed sequentially by CK2 and GSK3, resulting in the PACS-2-dependent inhibition of nuclear SIRT1 enzymatic activity and translocation of the deacetylase in the cytoplasm. Finally, we discuss how defects in the DBC1/PACS-2-controlled SIRT1 inhibitory pathway are associated with disease, including obesity and non-alcoholic fatty liver disease.
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