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Maynard D, Viehhauser A, Knieper M, Dreyer A, Manea G, Telman W, Butter F, Chibani K, Scheibe R, Dietz KJ. The In Vitro Interaction of 12-Oxophytodienoic Acid and Related Conjugated Carbonyl Compounds with Thiol Antioxidants. Biomolecules 2021; 11:biom11030457. [PMID: 33803875 PMCID: PMC8003295 DOI: 10.3390/biom11030457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/05/2021] [Accepted: 03/15/2021] [Indexed: 11/16/2022] Open
Abstract
α,β-unsaturated carbonyls interfere with numerous plant physiological processes. One mechanism of action is their reactivity toward thiols of metabolites like cysteine and glutathione (GSH). This work aimed at better understanding these interactions. Both 12-oxophytodienoic acid (12-OPDA) and abscisic acid (ABA) conjugated with cysteine. It was found that the reactivity of α,β-unsaturated carbonyls with GSH followed the sequence trans-2-hexenal < 12-OPDA ≈ 12-OPDA-ethylester < 2-cyclopentenone << methyl vinylketone (MVK). Interestingly, GSH, but not ascorbate (vitamin C), supplementation ameliorated the phytotoxic potential of MVK. In addition, 12-OPDA and 12-OPDA-related conjugated carbonyl compounds interacted with proteins, e.g., with members of the thioredoxin (TRX)-fold family. 12-OPDA modified two cysteinyl residues of chloroplast TRX-f1. The OPDAylated TRX-f1 lost its activity to activate the Calvin-Benson-cycle enzyme fructose-1,6-bisphosphatase (FBPase). Finally, we show that 12-OPDA interacts with cyclophilin 20-3 (Cyp20-3) non-covalently and affects its peptidyl-prolyl-cis/trans isomerase activity. The results demonstrate the high potential of 12-OPDA as a diverse interactor and cellular regulator and suggest that OPDAylation may occur in plant cells and should be investigated as novel regulatory mechanism.
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Affiliation(s)
- Daniel Maynard
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Andrea Viehhauser
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Madita Knieper
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Anna Dreyer
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Ghamdan Manea
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Wilena Telman
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Falk Butter
- Institute for Molecular Biology, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany;
| | - Kamel Chibani
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
| | - Renate Scheibe
- Department of Plant Physiology, Faculty of Biology and Chemistry, Osnabrück University, 49069 Osnabrück, Germany;
| | - Karl-Josef Dietz
- Department of Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, 33615 Bielefeld, Germany; (D.M.); (A.V.); (M.K.); (A.D.); (G.M.); (W.T.); (K.C.)
- Correspondence: ; Tel.: +49-521-106-5589
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Carreño M, Bresque M, Machado MR, Santos L, Durán R, Vitturi DA, Escande C, Denicola A. Nitro-fatty acids as activators of hSIRT6 deacetylase activity. J Biol Chem 2020; 295:18355-18366. [PMID: 33122195 PMCID: PMC7939442 DOI: 10.1074/jbc.ra120.014883] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 10/16/2020] [Indexed: 12/21/2022] Open
Abstract
Sirtuin 6, SIRT6, is critical for both glucose and lipid homeostasis and is involved in maintaining genomic stability under conditions of oxidative DNA damage such as those observed in age-related diseases. There is an intense search for modulators of SIRT6 activity, however, not many specific activators have been reported. Long acyl-chain fatty acids have been shown to increase the weak in vitro deacetylase activity of SIRT6 but this effect is modest at best. Herein we report that electrophilic nitro-fatty acids (nitro-oleic acid and nitro-conjugated linoleic acid) potently activate SIRT6. Binding of the nitro-fatty acid to the hydrophobic crevice of the SIRT6 active site exerted a moderate activation (2-fold at 20 μm), similar to that previously reported for non-nitrated fatty acids. However, covalent Michael adduct formation with Cys-18, a residue present at the N terminus of SIRT6 but absent from other isoforms, induced a conformational change that resulted in a much stronger activation (40-fold at 20 μm). Molecular modeling of the resulting Michael adduct suggested stabilization of the co-substrate and acyl-binding loops as a possible additional mechanism of SIRT6 activation by the nitro-fatty acid. Importantly, treatment of cells with nitro-oleic acid promoted H3K9 deacetylation, whereas oleic acid had no effect. Altogether, our results show that nitrated fatty acids can be considered a valuable tool for specific SIRT6 activation, and that SIRT6 should be considered as a molecular target for in vivo actions of these anti-inflammatory nitro-lipids.
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Affiliation(s)
- Mara Carreño
- Laboratorio de Fisicoquímica Biológica, Instituto de Química Biológica, Facultad de Ciencias, and Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay
| | - Mariana Bresque
- Laboratorio de Patologías del Metabolismo y el Envejecimiento, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Matías R Machado
- Laboratorio de Simulaciones Biomoleculares, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Leonardo Santos
- Laboratorio de Patologías del Metabolismo y el Envejecimiento, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Rosario Durán
- Unidad de Bioquímica y Proteómica Analíticas, Institut Pasteur de Montevideo, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Darío A Vitturi
- Department of Pharmacology and Chemical Biology; Heart, Lung, Blood and Vascular Medicine Institute, and Center for Critical Care Nephrology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Carlos Escande
- Laboratorio de Patologías del Metabolismo y el Envejecimiento, Institut Pasteur de Montevideo, Montevideo, Uruguay.
| | - Ana Denicola
- Laboratorio de Fisicoquímica Biológica, Instituto de Química Biológica, Facultad de Ciencias, and Centro de Investigaciones Biomédicas (CEINBIO), Universidad de la República, Montevideo, Uruguay.
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