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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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2
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Antioxidant capacity and antibacterial activity from Annona cherimola phytochemicals by ultrasound-assisted extraction and its comparison to conventional methods. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103239] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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3
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Villo P, Toom L, Eriste E, Vares L. Synthesis of Linear Aza and Thio Analogues of Acetogenins and Evaluation of Their Cytotoxicity. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300767] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Erhardt H, Steimle S, Muders V, Pohl T, Walter J, Friedrich T. Disruption of individual nuo-genes leads to the formation of partially assembled NADH:ubiquinone oxidoreductase (complex I) in Escherichia coli. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1817:863-71. [PMID: 22063474 DOI: 10.1016/j.bbabio.2011.10.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Revised: 10/14/2011] [Accepted: 10/21/2011] [Indexed: 10/15/2022]
Abstract
The proton-pumping NADH:ubiquinone oxidoreductase, respiratory complex I, couples the electron transfer from NADH to ubiquinone with the translocation of protons across the membrane. In Escherichia coli the complex is made up of 13 different subunits encoded by the so-called nuo-genes. Mutants, in which each of the nuo-genes was individually disrupted by the insertion of a resistance cartridge were unable to assemble a functional complex I. Each disruption resulted in the loss of complex I-mediated activity and the failure to extract a structurally intact complex. Thus, all nuo-genes are required either for the assembly or the stability of a functional E. coli complex I. The three subunits comprising the soluble NADH dehydrogenase fragment of the complex were detected in the cytoplasm of several nuo-mutants as one distinct band after BN-PAGE. It is discussed that the fully assembled NADH dehydrogenase fragment represents an assembly intermediate of the E. coli complex I. A partially assembled complex I bound to the membrane was detected in the nuoK and nuoL mutants, respectively. Overproduction of the ΔNuoL variant resulted in the accumulation of two populations of a partially assembled complex in the cytoplasmic membranes. Both populations are devoid of NuoL. One population is enzymatically active, while the other is not. The inactive population is missing cluster N2 and is tightly associated with the inducible lysine decarboxylase. This article is part of a Special Issue entitled: Biogenesis/Assembly of Respiratory Enzyme Complexes.
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Affiliation(s)
- Heiko Erhardt
- Albert-Ludwigs-Universität, Freiburg, Institut für Organische Chemie und Biochemie and Spemann Graduate School of Biology and Medicine, Albertstr. 21, 79104 Freiburg i. Br., Germany
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5
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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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6
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Kakutani N, Murai M, Sakiyama N, Miyoshi H. Exploring the binding site of delta(lac)-acetogenin in bovine heart mitochondrial NADH-ubiquinone oxidoreductase. Biochemistry 2010; 49:4794-803. [PMID: 20459120 DOI: 10.1021/bi100454b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Biochemical characterization of the inhibition mechanism of Deltalac-acetogenins synthesized in our laboratory indicated that they are a new type of inhibitor of bovine heart mitochondrial NADH-ubiquinone oxidoreductase (complex I) [Murai, M., et al. (2006) Biochemistry 45, 9778-9787]. To identify the binding site of Deltalac-acetogenins with a photoaffinity labeling technique, we synthesized a photoreactive Deltalac-acetogenin ([(125)I]diazinylated Deltalac-acetogenin, [(125)I]DAA) which has a small photoreactive diazirine group attached to a pharmacophore, the bis-THF ring moiety. Characterization of the inhibitory effects of DAA on bovine complex I revealed unique features specific to, though not completely the same as those of, the original Deltalac-acetogenin. Using [(125)I]DAA, we carried out photoaffinity labeling with bovine heart submitochondrial particles. Analysis of the photo-cross-linked protein by Western blotting and immunoprecipitation revealed that [(125)I]DAA binds to the membrane subunit ND1 with high specificity. The photo-cross-linking to the ND1 subunit was suppressed by an exogenous short-chain ubiquinone (Q(2)) in a concentration-dependent manner. Careful examination of the fragmentation patterns of the cross-linked ND1 generated by limited proteolysis using lysylendopeptidase, endoprotease Asp-N, or trypsin and their changes in the presence of the original Deltalac-acetogenin strongly suggested that the cross-linked residues are located at two different sites in the third matrix-side loop connecting the fifth and sixth transmembrane helices.
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Affiliation(s)
- Nobuyuki Kakutani
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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7
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Leiris SJ, Khdour OM, Segerman ZJ, Tsosie KS, Chapuis JC, Hecht SM. Synthesis and evaluation of verticipyrone analogues as mitochondrial complex I inhibitors. Bioorg Med Chem 2010; 18:3481-93. [PMID: 20456960 PMCID: PMC6426446 DOI: 10.1016/j.bmc.2010.03.070] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 03/24/2010] [Accepted: 03/26/2010] [Indexed: 11/28/2022]
Abstract
Verticipyrone has recently been isolated from the culture broth of Verticillium sp. and shown to inhibit NADH fumarate reductase, as well as NADH oxidoreductase (complex I) of the mitochondrial electron transport chain. In order to assess the structural elements in verticipyrone essential for complex I inhibitor, 15 structural analogues were prepared and analyzed for their effects on mitochondrial NADH oxidoreductase and NADH oxidase activities. Also measured were the abilities of several of the analogues to inhibit respiration as judged by a shift to glycolysis, and to inhibit the growth of several mammalian cell lines. The nature of the pyrone ring was shown to be important to potency of inhibition, as was the length and nature of substituents in the side chain of the analogues.
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Affiliation(s)
- Simon J. Leiris
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Omar M. Khdour
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Zachary J. Segerman
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Krystal S. Tsosie
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Jean-Charles Chapuis
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
| | - Sidney M. Hecht
- Center for BioEnergetics, The Biodesign Institute, and Department of Chemistry, Arizona State University, Tempe, AZ 85287, USA
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8
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Kojima N, Tanaka T. Medicinal chemistry of Annonaceous acetogenins: design, synthesis, and biological evaluation of novel analogues. Molecules 2009; 14:3621-61. [PMID: 19783948 PMCID: PMC6254973 DOI: 10.3390/molecules14093621] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 08/31/2009] [Accepted: 09/11/2009] [Indexed: 11/16/2022] Open
Abstract
Most Annonaceous acetogenins are characterized by between one and three THF ring(s) with one or two flanking hydroxyl group(s) in the center of a C32/34 fatty acid, and the terminal carboxylic acid is combined with a 2-propanol unit to form an alpha,beta-unsaturated gamma-lactone. While many studies have addressed the properties and synthesis of natural acetogenins due to their attractive biological activities and unique structural features, a number of analogues have also been described. This review covers the design, synthesis, and biological evaluation of acetogenin analogues.
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Affiliation(s)
- Naoto Kojima
- Authors to whom correspondence should be addressed; E-Mails: (N.K.); (T.T.); Tel.: +81-6-6879-8210; Fax: +81-6-6879-8214
| | - Tetsuaki Tanaka
- Authors to whom correspondence should be addressed; E-Mails: (N.K.); (T.T.); Tel.: +81-6-6879-8210; Fax: +81-6-6879-8214
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9
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Chapuis JC, Khdour O, Cai X, Lu J, Hecht SM. Synthesis and characterization of Δlac-acetogenins that potently inhibit mitochondrial complex I. Bioorg Med Chem 2009; 17:2204-9. [DOI: 10.1016/j.bmc.2008.10.071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Revised: 08/03/2008] [Accepted: 10/31/2008] [Indexed: 12/01/2022]
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10
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Ichimaru N, Murai M, Kakutani N, Kako J, Ishihara A, Nakagawa Y, Nishioka T, Yagi T, Miyoshi H. Synthesis and characterization of new piperazine-type inhibitors for mitochondrial NADH-ubiquinone oxidoreductase (complex I). Biochemistry 2008; 47:10816-26. [PMID: 18781777 DOI: 10.1021/bi8010362] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mode of action of Deltalac-acetogenins, strong inhibitors of bovine heart mitochondrial complex I, is different from that of traditional inhibitors such as rotenone and piericidin A [Murai, M., et al. (2007) Biochemistry 46 , 6409-6416]. As further exploration of these unique inhibitors might provide new insights into the terminal electron transfer step of complex I, we drastically modified the structure of Deltalac-acetogenins and characterized their inhibitory action. In particular, on the basis of structural similarity between the bis-THF and the piperazine rings, we here synthesized a series of piperazine derivatives. Some of the derivatives exhibited very potent inhibition at nanomolar levels. The hydrophobicity of the side chains and their balance were important structural factors for the inhibition, as is the case for the original Deltalac-acetogenins. However, unlike in the case of the original Deltalac-acetogenins, (i) the presence of two hydroxy groups is not crucial for the activity, (ii) the level of superoxide production induced by the piperazines is relatively high, (iii) the inhibitory potency for the reverse electron transfer is remarkably weaker than that for the forward event, and (iv) the piperazines efficiently suppressed the specific binding of a photoaffinity probe of natural-type acetogenins ([ (125)I]TDA) to the ND1 subunit. We therefore conclude that the action mechanism of the piperazine series differs from that of the original Deltalac-acetogenins. The photoaffinity labeling study using a newly synthesized photoreactive piperazine ([ (125)I]AFP) revealed that this compound binds to the 49 kDa subunit and an unidentified subunit, not ND1, with a frequency of approximately 1:3. A variety of traditional complex I inhibitors as well as Deltalac-acetogenins suppressed the specific binding of [ (125)I]AFP to the subunits. The apparent competitive behavior of inhibitors that seem to bind to different sites may be due to structural changes at the binding site, rather than occupying the same site. The meaning of the occurrence of diverse inhibitors exhibiting different mechanisms of action is discussed in light of the functionality of the membrane arm of complex I.
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Affiliation(s)
- Naoya Ichimaru
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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11
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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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12
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Abe M, Kubo A, Yamamoto S, Hatoh Y, Murai M, Hattori Y, Makabe H, Nishioka T, Miyoshi H. Dynamic Function of the Spacer Region of Acetogenins in the Inhibition of Bovine Mitochondrial NADH-Ubiquinone Oxidoreductase (Complex I). Biochemistry 2008; 47:6260-6. [DOI: 10.1021/bi800506s] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masato Abe
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Akina Kubo
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Shuhei Yamamoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Yoshinori Hatoh
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Masatoshi Murai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Yasunao Hattori
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Hidefumi Makabe
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Takaaki Nishioka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Hideto Miyoshi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
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13
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Radin NS. Allylic structures in cancer drugs and body metabolites that control cell life and death. Expert Opin Drug Discov 2007; 2:809-21. [DOI: 10.1517/17460441.2.6.809] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Effect of stereochemistry of Δlac-acetogenins on the inhibition of mitochondrial complex I (NADH-ubiquinone oxidoreductase). Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.11.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Derbré S, Duval R, Roué G, Garofano A, Poupon E, Brandt U, Susin SA, Hocquemiller R. Semisynthesis and screening of a small library of pro-apoptotic squamocin analogues: selection and study of a benzoquinone hybrid with an improved biological profile. ChemMedChem 2006; 1:118-29. [PMID: 16892343 DOI: 10.1002/cmdc.200500011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Acetogenins of Annonaceae, including squamocin (1), exert spectacular cytotoxicity and the most potent inhibition of NADH:ubiquinone oxidoreductase known so far. Cell death induced by these natural products was identified as apoptosis and was thought to be linked to alterations in mitochondrial function. Quinone-squamocin hybrid compounds were semisynthesized and evaluated for their pro-apoptotic properties with a screening method based on dissipation of the mitochondrial transmembrane potential (DeltaPsim). Herein, we report a short one-step synthesis of a squamocin carboxylic acid analogue. For the first time on a natural product, the radical decarboxylation and quinone addition reaction has enabled preparation of a library of squamocin-quinone hybrids and four other analogues. Squamoquinone, tenfold more potent than squamocin as an inducer of apoptosis, emerged as a promising compound, as it induces apoptosis through a mitochondrial caspase-dependent pathway.
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Affiliation(s)
- Séverine Derbré
- Laboratoire de Pharmacognosie associé au CNRS (BioCIS, UMR 8076), Université Paris-Sud 11, Centre d'Etudes Pharmaceutiques, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry CEDEX, France
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16
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Piccialli V, Caserta T, Caruso L, Gomez-Paloma L, Bifulco G. RuO4-mediated oxidative polycyclization of linear polyenes. A new approach to the synthesis of the bis-THF diol core of antitumour cis–cis adjacent bis-THF annonaceous acetogenins. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.08.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Ichimaru N, Abe M, Murai M, Senoh M, Nishioka T, Miyoshi H. Function of the alkyl side chains of Δlac-acetogenins in the inhibitory effect on mitochondrial complex I (NADH-ubiquinone oxidoreductase). Bioorg Med Chem Lett 2006; 16:3555-8. [PMID: 16621539 DOI: 10.1016/j.bmcl.2006.03.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Revised: 03/06/2006] [Accepted: 03/24/2006] [Indexed: 11/23/2022]
Abstract
We synthesized a series of Deltalac-acetogenins in which the two alkyl side chains were systematically modified, and examined their inhibitory effect on bovine heart mitochondrial complex I (NADH-ubiquinone oxidoreductase). The results revealed that the physicochemical properties of the side chains, such as the balance of hydrophobicity and the width (or bulkiness) of the chains, are important structural factors for a potent inhibitory effect of amphiphilic Deltalac-acetogenins. This is probably because such properties decide the precise location of the hydrophilic bis-THF ring moiety in the enzyme embedded in the inner mitochondrial membrane.
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Affiliation(s)
- Naoya Ichimaru
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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Duval RA, Poupon E, Brandt U, Hocquemiller R. Remarkable substituent effect: beta-aminosquamocin, a potent dual inhibitor of mitochondrial complexes I and III. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2006; 1709:191-4. [PMID: 16139789 DOI: 10.1016/j.bbabio.2005.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 07/22/2005] [Accepted: 07/29/2005] [Indexed: 11/21/2022]
Abstract
The introduction of a primary amine function on the terminal alpha,beta-unsaturated lactone of squamocin 1, a common structural hallmark of annonaceous acetogenins, shifted this specific inhibitor of mitochondrial complex I into a potent dual inhibitor of complexes I and III. The mechanism of action of beta-aminosquamocin 2, against these two respiratory targets, is studied and discussed in view of current structure-activity relationship knowledge in the acetogenin series.
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Affiliation(s)
- Romain A Duval
- Laboratoire de Pharmacognosie associé au CNRS (UMR 8076, BioCIS), Centre d'Etudes Pharmaceutiques, Université Paris-Sud 11, 92296 Châtenay-Malabry CEDEX, France
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