Abstract
Sirtuin 6 (SIRT6) is an NAD+-dependent deacetylase regulating important functions: modulators of its enzymatic activity have been considered as possible therapeutic agents. Besides the deacetylase activity, SIRT6 also has NAD+-dependent deacylase activity, whereby it regulates the secretion of cytokines and proteins. We identified novel SIRT6 modulators with a lysine-based structure: compound 1 enhances SIRT6 deacylase while inhibiting the deacetylase activity. As expected based on the biological effects of SIRT6 deacetylase activity, compound 1 increased histone 3 lysine 9 acetylation and the activity of glycolytic enzymes. Moreover, the fact that compound 1 enhanced SIRT6 deacylase activity was accompanied by an increased TNF-α release. In conclusion, new SIRT6 modulators with a lysine-like structure were identified, with differential effects on specific SIRT6 activities.
Graphic abstract
The novel SIRT6 modulator concomitantly inhibits deacetylase and enhances deacylase activity.
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Abbreviations
- SIRT6:
-
Sirtuin 6
- TNF-α:
-
Tumor necrosis factor α
- HATU:
-
1-[Bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium 3-oxid hexafluorophosphate
- HBTU:
-
O-benzotriazol-N,N,N′,N′-tetramethyluroniumhexafluorophosphate
- DMF:
-
Dimethylformamide
- DIPEA:
-
N,N-diisopropylethylamine
- DCM:
-
Dichloromethane
- TFA:
-
Trifluoroacetic acid
- Q :
-
2,4-Dioxo-N-(4-(pyridin-3-yloxy)phenyl)-1,2,3,4-tetrahydroquinazoline-6-sulfonamide
- PFK:
-
Phosphofructokinase
- PK:
-
Pyruvate kinase
- LDH:
-
Lactate dehydrogenase
- Fmoc:
-
9-Fluorenylmethoxycarbonyl
- NMP:
-
N-methylpyrrolidone
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Acknowledgements
This work was supported by the Italian Association for Cancer Research (AIRC) [Grants start-up #6266 and IG #19172 to A.D.R and IG #17736 and #22098 to A.N.]; by the FP7 Grants PANACREAS [GA #256986 to A.N., S.B. and I.R.] and ATHERO-B-CELL [GA #602114 to A.N.]; by the Italian Ministry of Health [Grant GR-2011-02347192], to A.N.; by the Fondazione Umberto Veronesi (to A.N. and to I.C.); by a 5 × 1000 2014 fund from the IRCCS Ospedale Policlinico San Martino (to A.N.); by the University of Genova (to A.N. and S.B.); by the BC161452P1 Grant of the Breast Cancer Research Program of the US Department of Defense (to A.N.); by “Ministerio de Economía y Competitividad” of Spain (CTQ2016-77270-R) to I.R. GS was recipient of a fellowship for young investigators granted by Collegio Ghislieri (Pavia, Italy). This work was also supported by FISM - Fondazione Italiana Sclerosi Multipla – cod. 2017/R/6 and financed or co-financed with the ‘5 per mille’ public funding (to S.B.). We thank Prof. Antonio De Flora for his careful reading of our manuscript.
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Sociali, G., Liessi, N., Grozio, A. et al. Differential modulation of SIRT6 deacetylase and deacylase activities by lysine-based small molecules. Mol Divers 24, 655–671 (2020). https://doi.org/10.1007/s11030-019-09971-2
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DOI: https://doi.org/10.1007/s11030-019-09971-2