Download MendeleyIdentification of a novel small molecule that inhibits deacetylase but not defatty-acylase reaction catalysed by SIRT2.
Kudo, N., Ito, A., Arata, M., Nakata, A., Yoshida, M.(2018) Philos Trans R Soc Lond B Biol Sci 373
- PubMed: 29685974
- DOI: https://doi.org/10.1098/rstb.2017.0070
- Primary Citation of Related Structures:
5Y0Z - PubMed Abstract:
SIRT2 is a member of the human sirtuin family of proteins and possesses NAD + -dependent lysine deacetylase/deacylase activity. SIRT2 has been implicated in carcinogenesis in various cancers including leukaemia and is considered an attractive target for cancer therapy. Here, we identified NPD11033, a selective small-molecule SIRT2 inhibitor, by a high-throughput screen using the RIKEN NPDepo chemical library. NPD11033 was largely inactive against other sirtuins and zinc-dependent deacetylases. Crystallographic analysis revealed a unique mode of action, in which NPD11033 creates a hydrophobic cavity behind the substrate-binding pocket after a conformational change of the Zn-binding small domain of SIRT2. Furthermore, it forms a hydrogen bond to the active site histidine residue. In addition, NPD11033 inhibited cell growth of human pancreatic cancer PANC-1 cells with a concomitant increase in the acetylation of eukaryotic translation initiation factor 5A, a physiological substrate of SIRT2. Importantly, NPD11033 failed to inhibit defatty-acylase activity of SIRT2, despite its potent inhibitory effect on its deacetylase activity. Thus, NPD11033 will serve as a useful tool for both developing novel anti-cancer agents and elucidating the role of SIRT2 in various cellular biological processes.This article is part of a discussion meeting issue 'Frontiers in epigenetic chemical biology'.
- Seed Compounds Exploratory Unit for Drug Discovery Platform, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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