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Grba DN, Blaza JN, Bridges HR, Agip ANA, Yin Z, Murai M, Miyoshi H, Hirst J. Cryo-electron microscopy reveals how acetogenins inhibit mitochondrial respiratory complex I. J Biol Chem 2022; 298:101602. [PMID: 35063503 PMCID: PMC8861642 DOI: 10.1016/j.jbc.2022.101602] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 12/22/2022] Open
Abstract
Mitochondrial complex I (NADH:ubiquinone oxidoreductase), a crucial enzyme in energy metabolism, captures the redox potential energy from NADH oxidation/ubiquinone reduction to create the proton motive force used to drive ATP synthesis in oxidative phosphorylation. High-resolution single-particle electron cryo-EM analyses have provided detailed structural knowledge of the catalytic machinery of complex I, but not of the molecular principles of its energy transduction mechanism. Although ubiquinone is considered to bind in a long channel at the interface of the membrane-embedded and hydrophilic domains, with channel residues likely involved in coupling substrate reduction to proton translocation, no structures with the channel fully occupied have yet been described. Here, we report the structure (determined by cryo-EM) of mouse complex I with a tight-binding natural product acetogenin inhibitor, which resembles the native substrate, bound along the full length of the expected ubiquinone-binding channel. Our structure reveals the mode of acetogenin binding and the molecular basis for structure-activity relationships within the acetogenin family. It also shows that acetogenins are such potent inhibitors because they are highly hydrophobic molecules that contain two specific hydrophilic moieties spaced to lock into two hydrophilic regions of the otherwise hydrophobic channel. The central hydrophilic section of the channel does not favor binding of the isoprenoid chain when the native substrate is fully bound but stabilizes the ubiquinone/ubiquinol headgroup as it transits to/from the active site. Therefore, the amphipathic nature of the channel supports both tight binding of the amphipathic inhibitor and rapid exchange of the ubiquinone/ubiquinol substrate and product.
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Affiliation(s)
- Daniel N Grba
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - James N Blaza
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - Hannah R Bridges
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - Ahmed-Noor A Agip
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - Zhan Yin
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK
| | - Masatoshi Murai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Hideto Miyoshi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Judy Hirst
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK.
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Costa MS, Santana AE, Oliveira LL, Zanuncio JC, Serrão JE. Toxicity of squamocin on Aedes aegypti larvae, its predators and human cells. PEST MANAGEMENT SCIENCE 2017; 73:636-640. [PMID: 27366879 DOI: 10.1002/ps.4350] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 06/22/2016] [Accepted: 06/28/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND The mosquito Aedes aegypti transmits a virus that causes diverse human diseases, and control of the vector is an important strategy to avoid disease propagation. Plants in the family Annonaceae are recognised as sources of molecules with uses in the medical and agriculture fields. Molecules of secondary metabolites of Annonaceae plants exhibit insecticidal potential against insect pests and vectors, especially acetogenins, showing high toxicity at low doses, which has encouraged research into producing new insecticide molecules. Herein, we identify an acetogenin from Annona mucosa seeds (chemical analysis) and provide the results of toxicity tests against larvae of A. aegypti (target insect) and its predators Culex bigoti and Toxorhynchites theobaldi (non-target insects) and cytotoxicity to human leukocytes. RESULTS We identified squamocin (C37 H66 O7 ), a fatty acid with a bis-tetrahydrofuran ring. In A. aegypti, this compound caused behavioural disturbance before larval death and high mortality at low concentrations (LC50 = 0.01 µg mL-1 and LC90 = 0.11 µg mL-1 ). However, in predators and human leukocytes, squamocin showed no toxicity effect, indicating the selectivity of this molecule for non-target organisms. CONCLUSION We identified squamocin from A. mucosa seeds, which exhibited lethal action against A. aegypti and showed selectivity for non-target insects and low cytotoxicity to human cells. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Marilza S Costa
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Antônio Eg Santana
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Maceió, Alagoas, Brazil
| | - Leandro L Oliveira
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - José C Zanuncio
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - José E Serrão
- Laboratory of Ultrastructural Cell, Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
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Miao YJ, Xu XF, Xu F, Chen Y, Chen JW, Li X. The structure–activity relationships of mono-THF ACGs on mitochondrial complex I with a molecular modelling study. Nat Prod Res 2014; 28:1929-35. [DOI: 10.1080/14786419.2014.953499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Larvicidal and cytotoxic potential of squamocin on the midgut of Aedes aegypti (Diptera: Culicidae). Toxins (Basel) 2014; 6:1169-76. [PMID: 24674934 PMCID: PMC4014726 DOI: 10.3390/toxins6041169] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 02/28/2014] [Accepted: 03/11/2014] [Indexed: 11/16/2022] Open
Abstract
Acetogenins are secondary metabolites exclusively produced by Annonaceae, which have antitumor, cytotoxic, and pesticide activities. In this study, we evaluated the larvicidal and cytotoxic effect of squamocin from Annona squamosa on Aedes aegypti (Diptera: Culicidae) midgut. The compound was solubilized in 2% Tween 20 at 10, 20, 50, 80 and 100 ppm. The assay was conducted in a completely randomized design with four replications, each with 20 third-instar larvae. Larval mortality was assessed every hour until total mortality, and the data were subjected to Probit analysis. Cellular damage was evaluated every 30 min in groups comprising five larvae subjected to squamocin at 50 and 100 ppm for 240 min. The total larval mortality occurred after 360 min following application of 50, 80, and 100 ppm squamocin, and 600 min after applying other concentrations with LC50 at 6.4 ppm. Both 50 and 100 ppm of squamocin showed cytotoxic activity in the midgut epithelium of A. aegypti after 240 min with 50 ppm resulting in midgut cells with light cytoplasm containing small vacuoles, whereas at 100 ppm were found cells with cytoplasm highly vacuolated, damaged apical surface and cell protrusion toward the gut lumen. In conclusion, squamocin has the potential to control A. aegypti.
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Analysis of cytotoxic activity at short incubation times reveals profound differences among Annonaceus acetogenins, inhibitors of mitochondrial Complex I. J Bioenerg Biomembr 2012. [PMID: 23180141 DOI: 10.1007/s10863-012-9490-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Annonaceous acetogenins are potent cytotoxic agents against tumor cell lines as well as potent inhibitors of mitochondrial Complex I (Degli Esposti and Ghelli Biochim Biophys Acta 1187:116-120, 1994; Degli Esposti et al. Biochem J 301(Pt 1):161-167, 1994; Tormo et al. Arch Biochem Biophys 369:119-126, 1999). Eighteen different ACGs belonging to seven structural sub-families were tested against six tumor and two non tumor cell lines in a MTT cytotoxicity assay to evaluate the correlation between mitochondrial Complex I inhibition and cytotoxic activity potency and selectivity. The results showed a substantial heterogeneity in potency and selectivity among the different compounds tested, although no clear overall structure-activity relationships could be established. To further characterize the biological activity of these compounds, four ACGs were selected based on their inhibition binding sites to Complex I, to evaluate their cytotoxic activity over a 15-minute to 48-hour period using a more sensitive time-course LDH cytotoxicity assay. Our results indicate that, although all of the ACGs were highly cytotoxic in HepG2 cell lines at 24 h, each sub-class behaves rather differently at shorter times. Perhaps other aspects related to how these compounds reach or bind to their target sites, or differences in their ability to cross the cell and/or the mitochondrial membranes, could help explain their different activities. This different behavior between ACGs may provide new clues for a better understanding of their potential antitumor properties.
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de Pedro N, Cautain B, Melguizo A, Vicente F, Genilloud O, Peláez F, Tormo JR. Mitochondrial complex I inhibitors, acetogenins, induce HepG2 cell death through the induction of the complete apoptotic mitochondrial pathway. J Bioenerg Biomembr 2012. [PMID: 23180140 DOI: 10.1007/s10863-012-9489-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The development of new anti-neoplastic drugs is a key issue for cancer chemotherapy due to the reality that, most likely, certain cancer cells are resistant to current chemotherapy. The past two decades have witnessed tremendous advances in our understanding of the pathogenesis of cancer. These advances have allowed identification new targets as oncogenes, tumor supressor genes and the possible implication of the mitochondria (Fulda et al. Nat Rev Drug Discov 9:447-464, 2010). Annonaceous Acetogenins (ACGs) have been described as the most potent inhibitors of the respiratory chain because of their interaction with mitochondrial Complex I (Degli Esposti and Ghelli Biochim Biophys Acta 1187:116-120, 1994; Zafra-Polo et al. Phytochemistry 42:253-271, 1996; Miyoshi et al. Biochim Biophys Acta 1365:443-452, 1998; Tormo et al. Arch Biochem Biophys 369:119-126, 1999; Motoyama et al. Bioorg Med Chem Lett 12:2089-2092, 2002). To explore a possible application of natural products from Annonaceous plants to cancer treatment, we have selected four bis-tetrahydrofuranic ACGs, three from Annona cherimolia (cherimolin-1, motrilin and laherradurin) and one from Rollinia mucosa (rollinianstatin-1) in order to fully describe their mechanisms responsible within the cell (Fig. 1). In this study, using a hepato-carcinoma cell line (HepG2) as a model, we showed that the bis-THF ACGs caused cell death through the induction of the apoptotic mitochondrial pathway. Their potency and behavior were compared with the classical mitochondrial respiratory chain Complex I inhibitor rotenone in every apoptotic pathway step.
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Affiliation(s)
- Nuria de Pedro
- Fundación MEDINA. Parque Tecnológico Ciencias de la Salud, Avenida del Conocimiento 3, 18100 Granada, Spain.
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Khallouki F, Haubner R, Ulrich CM, Owen RW. Ethnobotanical Survey, Chemical Composition, and Antioxidant Capacity of Methanolic Extract of the Root Bark ofAnnona cuneataOliv. J Med Food 2011; 14:1397-402. [DOI: 10.1089/jmf.2010.0228] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Farid Khallouki
- Division of Preventive Oncology, National Center for Tumor Diseases/German Cancer Research Center, Heidelberg, Germany
- Natural Substances Biochemistry Laboratory, Boutalamine, Errachidia, Morocco
| | - Roswitha Haubner
- Division of Preventive Oncology, National Center for Tumor Diseases/German Cancer Research Center, Heidelberg, Germany
| | - Cornelia M. Ulrich
- Division of Preventive Oncology, National Center for Tumor Diseases/German Cancer Research Center, Heidelberg, Germany
| | - Robert W. Owen
- Division of Preventive Oncology, National Center for Tumor Diseases/German Cancer Research Center, Heidelberg, Germany
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Bombasaro JA, Blessing LDT, Diaz S, Neske A, Suvire FD, Enriz RD, Rodríguez AM. Theoretical and experimental study of the interactions of annonaceous acetogenins with artificial lipid bilayers. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.07.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bis-THF motif of acetogenin binds to the third matrix-side loop of ND1 subunit in mitochondrial NADH-ubiquinone oxidoreductase. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1807:1170-6. [DOI: 10.1016/j.bbabio.2011.05.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 05/06/2011] [Accepted: 05/10/2011] [Indexed: 11/17/2022]
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Konno H, Makabe H, Hattori Y, Nosaka K, Akaji K. Synthesis of solamin type mono-THF acetogenins using cross-metathesis. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.08.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Petruk AA, Marti MA, Álvarez RMS. Thyroid Hormone Interactions with DMPC Bilayers. A Molecular Dynamics Study. J Phys Chem B 2009; 113:13357-64. [DOI: 10.1021/jp9055522] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ariel A. Petruk
- Instituto Superior de investigaciones Biológicas (CONICET-UNT), Chacabuco 461, San Miguel de Tucumán, Tucumán, T4000CAN, Argentina, Departamento de Química Biológica y Departamento de Química Inorgánica, Analítica y Química Física (INQUIMAE-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, C1428EHA, Argentina, and Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San
| | - Marcelo A. Marti
- Instituto Superior de investigaciones Biológicas (CONICET-UNT), Chacabuco 461, San Miguel de Tucumán, Tucumán, T4000CAN, Argentina, Departamento de Química Biológica y Departamento de Química Inorgánica, Analítica y Química Física (INQUIMAE-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, C1428EHA, Argentina, and Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San
| | - Rosa María S. Álvarez
- Instituto Superior de investigaciones Biológicas (CONICET-UNT), Chacabuco 461, San Miguel de Tucumán, Tucumán, T4000CAN, Argentina, Departamento de Química Biológica y Departamento de Química Inorgánica, Analítica y Química Física (INQUIMAE-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires, C1428EHA, Argentina, and Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San
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Derbré S, Gil S, Taverna M, Boursier C, Nicolas V, Demey-Thomas E, Vinh J, Susin SA, Hocquemiller R, Poupon E. Highly cytotoxic and neurotoxic acetogenins of the Annonaceae: new putative biological targets of squamocin detected by activity-based protein profiling. Bioorg Med Chem Lett 2008; 18:5741-4. [PMID: 18851912 DOI: 10.1016/j.bmcl.2008.09.091] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Revised: 09/22/2008] [Accepted: 09/23/2008] [Indexed: 12/15/2022]
Abstract
Acetogenins of the Annonaceae are strong inhibitors of mitochondrial complex I but discrepancies in the structure/activity relationships pled the search for other targets within the whole cell proteome. Combining hemisynthetic work, Cu-catalyzed Huisgen cycloaddition and proteomic techniques we have identified new putative protein targets of squamocin ruling out the previously accepted 'complex I dogma'. These results give new insights into the mechanism of action of these potent neurotoxic molecules.
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Affiliation(s)
- Séverine Derbré
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076, Faculté de Pharmacie, Université Paris-Sud 11, Châtenay-Malabry Cedex, France
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Bombasaro JA, Masman MF, Santágata LN, Freile ML, Rodríguez AM, Enriz RD. A Comprehensive Conformational Analysis of Bullacin B, a Potent Inhibitor of Complex I. Molecular Dynamics Simulations and Ab Initio Calculations. J Phys Chem A 2008; 112:7426-38. [DOI: 10.1021/jp801962x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José A. Bombasaro
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Marcelo F. Masman
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Luis N. Santágata
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Mónica L. Freile
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Ana M. Rodríguez
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Ricardo D. Enriz
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
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Konno H, Okuno Y, Makabe H, Nosaka K, Onishi A, Abe Y, Sugimoto A, Akaji K. Total synthesis of cis-solamin A, a mono-tetrahydrofuran acetogenin isolated from Annona muricata. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.11.190] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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