2. Academic Validation
  3. Mechanism-based inactivators of sirtuin 5: A focused structure-activity relationship study

Mechanism-based inactivators of sirtuin 5: A focused structure-activity relationship study

  • Bioorg Med Chem Lett. 2025 Jan 1:115:130017. doi: 10.1016/j.bmcl.2024.130017.
Tobias N Hansen 1,  Xinyi Yuan 2,  Marc S I Santana 2,  Christian A Olsen 3
Affiliations

Affiliations

  • 1 Center for Biopharmaceuticals & Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 160, DK-2100 Copenhagen, Denmark. Electronic address: tobias.norby.hansen@sund.ku.dk.
  • 2 Center for Biopharmaceuticals & Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 160, DK-2100 Copenhagen, Denmark.
  • 3 Center for Biopharmaceuticals & Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 160, DK-2100 Copenhagen, Denmark. Electronic address: cao@sund.ku.dk.
PMID: 39521149 DOI: 10.1016/j.bmcl.2024.130017
Abstract

Sirtuin 5 (SIRT5) is a lysine deacylase Enzyme that cleaves negatively charged ε-N-acyllysine posttranslational modifications, arising from short dicarboxylic acids. Inhibition of SIRT5 has been suggested as a target for treatment of leukemia and breast Cancer. In this work, we performed a focused structure-activity relationship study that identified highly potent inhibitors of SIRT5. Examples of these inhibitors were shown by kinetic evaluation to function as mechanism-based inactivators. Masking of a crucial carboxylate functionality in the inhibitors provided prodrugs, which were demonstrated to bind SIRT5 in cells. This work underscores the importance of kinetic characterization of Enzyme inhibitors and provides insights for the further optimization of inhibitors of SIRT5 with potential for in vivo applications.

Keywords

Enzyme inhibitors; Enzyme kinetics; Mechanism-based inactivation; Posttranslational modification; SIRT5; Sirtuins.

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