1
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Wilkens D, Simon J. Biosynthesis and function of microbial methylmenaquinones. Adv Microb Physiol 2023; 83:1-58. [PMID: 37507157 DOI: 10.1016/bs.ampbs.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
The membranous quinone/quinol pool is essential for the majority of life forms and its composition has been widely used as a biomarker in microbial taxonomy. The most abundant quinone is menaquinone (MK), which serves as an essential redox mediator in various electron transport chains of aerobic and anaerobic respiration. Several methylated derivatives of MK, designated methylmenaquinones (MMKs), have been reported to be present in members of various microbial phyla possessing either the classical MK biosynthesis pathway (Men) or the futalosine pathway (Mqn). Due to their low redox midpoint potentials, MMKs have been proposed to be specifically involved in appropriate electron transport chains of anaerobic respiration. The class C radical SAM methyltransferases MqnK, MenK and MenK2 have recently been shown to catalyse specific MK methylation reactions at position C-8 (MqnK/MenK) or C-7 (MenK2) to synthesise 8-MMK, 7-MMK and 7,8-dimethylmenaquinone (DMMK). MqnK, MenK and MenK2 from organisms such as Wolinella succinogenes, Adlercreutzia equolifaciens, Collinsella tanakaei, Ferrimonas marina and Syntrophus aciditrophicus have been functionally produced in Escherichia coli, enabling extensive quinone/quinol pool engineering of the native MK and 2-demethylmenaquinone (DMK). Cluster and phylogenetic analyses of available MK and MMK methyltransferase sequences revealed signature motifs that allowed the discrimination of MenK/MqnK/MenK2 family enzymes from other radical SAM enzymes and the identification of C-7-specific menaquinone methyltransferases of the MenK2 subfamily. It is envisaged that this knowledge will help to predict the methylation status of the menaquinone/menaquinol pool of any microbial species (or even a microbial community) from its (meta)genome.
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Affiliation(s)
- Dennis Wilkens
- Microbial Energy Conversion and Biotechnology, Department of Biology, Technical University of Darmstadt, Schnittspahnstraße 10, Darmstadt, Germany
| | - Jörg Simon
- Microbial Energy Conversion and Biotechnology, Department of Biology, Technical University of Darmstadt, Schnittspahnstraße 10, Darmstadt, Germany; Centre for Synthetic Biology, Technical University of Darmstadt, Darmstadt, Germany.
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2
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Shimizu N, Shigemitsu H, Kida T, Bach T, Mori T. Visible Light-Induced Regio- and Enantiodifferentiating [2 + 2] Photocycloaddition of 1,4-Naphthoquinones Mediated by Oppositely Coordinating 1,3,2-Oxazaborolidine Chiral Lewis Acid. J Org Chem 2022; 87:8071-8083. [PMID: 35652135 DOI: 10.1021/acs.joc.2c00730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A range of asymmetric photochemical transformations using visible light have recently become considerably attractive. Among the various approaches, chiral Lewis acid association to enones for [2 + 2] and ortho photocycloadditions and oxadi-π-methane rearrangements have shown to be very promising. Naturally, chiral Lewis acid coordination protects one of the prochiral faces of the C═C double bond, which enables an effective enantiodifferentiation in the following bond-forming process(es). Here, we studied regio- and enantiodifferentiating [2 + 2] photocycloaddition reactions of naphthoquinone derivatives mediated by chiral oxazaborolidines. A stereochemical control was quite challenging for the 2-ene-1,4-dione substrate, as a double coordination of Lewis acid essentially cancels out the face selectivity, and a mono-coordination to each carbonyl group leads to an opposite stereochemical outcome. Furthermore, a stepwise coordination in the ground state of Lewis acid in a 1:1 fashion was practically inaccessible. We found that the excited-state decomplexation is a key to accomplish high regio- and enantioselectivities in the photocycloaddition of an ene-dione.
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Affiliation(s)
- Nao Shimizu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Hajime Shigemitsu
- Integrated Frontier Research for Medical Science Division Institute for OTRI, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Toshiyuki Kida
- Integrated Frontier Research for Medical Science Division Institute for OTRI, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, Garching 85747, Germany
| | - Tadashi Mori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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3
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Faúndes J, Muñoz-Osses M, Morales P, Tasca F, Loyola CZ, Faúndez M, Mascayano C, Ibacache JA. Effect of substituents and chain length in amino-1,4-naphthoquinones on glutathione-S-transferase inhibition: molecular docking and electrochemical perspectives: a structure–activity study. NEW J CHEM 2022. [DOI: 10.1039/d2nj04079d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The highlights of structure–activity relationship in GST inhibition.
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Affiliation(s)
- Judith Faúndes
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
| | - Michelle Muñoz-Osses
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
| | - Pilar Morales
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
| | - Federico Tasca
- Departamento de Química de Los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
| | - César Zúñiga Loyola
- Departamento de Química de Los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
| | - Mario Faúndez
- Pontificia Universidad Católica de Chile, Facultad de Química, Departamento de Farmacia, Laboratorio de Toxicología, Vicuña Mackenna 4860, 7820436, Macul, Santiago, Chile
| | - Carolina Mascayano
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
| | - Juana A. Ibacache
- Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Sucursal Matucana, Santiago, 9170022, Chile
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4
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Sommart U, Rukachaisirikul V, Saithong S, Phongpaichit S, Sakayaroj J, Preedanon S, Chainok K, Khunrong T. 2-Oxaspiro[4.5]decane and α-pyrenocine derivatives from the endophytic fungus Roussoella sp. PSU-H51. Nat Prod Res 2021; 36:4911-4920. [PMID: 33853446 DOI: 10.1080/14786419.2021.1910692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
One new 2-oxaspiro[4.5]decane, roussoellide, and one new α-pyrenocine, 2',3'-dihydropyrenocine A, together with nine known compounds including known arthropsolide A, and pyrenocines A and E, were obtained from the culture broth of the endophytic fungus Roussoella sp. Their structures were determined using spectroscopic data. The absolute configuration of known arthropsolide A was assigned on the basis of X-ray diffraction data using Cu Kα radiation. Known pyrenocine A displayed weak cytotoxic activity against breast cancer (MCF-7) cells with an IC50 value of 27.1 µM and weak antifungal activity against Microsporum gypseum SH-MU-4 with an MIC value of 615.2 µM.
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Affiliation(s)
- Ubonta Sommart
- Faculty of Science and Technology, Suratthani Rajabhat University, Surat Thani, Thailand
| | - Vatcharin Rukachaisirikul
- Division of Physical Science and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Thailand
| | - Saowanit Saithong
- Division of Physical Science and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Thailand
| | - Souwalak Phongpaichit
- Faculty of Science, Division of Biological Science, Prince of Songkla University, Hat Yai, Thailand
| | - Jariya Sakayaroj
- School of Science, Walailak University, Nakhonsithammarat, Thailand
| | - Sita Preedanon
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, Klong Luang, Thailand
| | - Kittipong Chainok
- Faculty of Science and Technology, Material and Textile Technology, Thammasat University, Khlong Luang, Thailand
| | - Teerayut Khunrong
- Scientific Laboratory & Equipment Center, Prince of Songkla University, Surat Thani, Thailand
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5
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Sena FV, Sousa FM, Oliveira ASF, Soares CM, Catarino T, Pereira MM. Regulation of the mechanism of Type-II NADH: Quinone oxidoreductase from S. aureus. Redox Biol 2018. [PMID: 29524843 PMCID: PMC5857484 DOI: 10.1016/j.redox.2018.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Type-II NADH:quinone oxidoreductases (NDH-2s) are membrane proteins involved in respiratory chains and the only enzymes with NADH:quinone oxidoreductase activity expressed in Staphylococcus aureus (S. aureus), one of the most common causes of clinical infections. NDH-2s are members of the two-Dinucleotide Binding Domains Flavoprotein (tDBDF) superfamily, having a flavin adenine dinucleotide, FAD, as prosthetic group and NAD(P)H as substrate. The establishment of a Charge-Transfer Complex (CTC) between the isoalloxazine ring of the reduced flavin and the nicotinamide ring of NAD+ in NDH-2 was described, and in this work we explored its role in the kinetic mechanism using different electron donors and electron acceptors. We observed that CTC slows down the rate of the second half reaction (quinone reduction) and determines the effect of HQNO, an inhibitor. Also, protonation equilibrium simulations clearly indicate that the protonation probability of an important residue for proton transfer to the active site (D302) is influenced by the presence of the CTC. We propose that CTC is critical for the overall mechanism of NDH-2 and possibly relevant to keep a low quinol/quinone ratio and avoid excessive ROS production in vivo.
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Affiliation(s)
- Filipa V Sena
- Instituto de Tecnologia Química e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da Republica EAN, 2780-157 Oeiras, Portugal
| | - Filipe M Sousa
- Instituto de Tecnologia Química e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da Republica EAN, 2780-157 Oeiras, Portugal
| | - A Sofia F Oliveira
- School of Biochemistry, University of Bristol, University Walk, Bristol BS8 1TD, UK
| | - Cláudio M Soares
- Instituto de Tecnologia Química e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da Republica EAN, 2780-157 Oeiras, Portugal
| | - Teresa Catarino
- Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Manuela M Pereira
- Instituto de Tecnologia Química e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da Republica EAN, 2780-157 Oeiras, Portugal; University of Lisbon, Faculty of Sciences, BioISI - Biosystems & Integrative Sciences Institute, Campo Grande, C8, 1749-016 Lisboa, Portugal.
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6
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Hein S, Klimmek O, Polly M, Kern M, Simon J. A class C radicalS-adenosylmethionine methyltransferase synthesizes 8-methylmenaquinone. Mol Microbiol 2017; 104:449-462. [DOI: 10.1111/mmi.13638] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sascha Hein
- Microbial Energy Conversion and Biotechnology, Department of Biology; Technische Universität Darmstadt; Schnittspahnstraße 10 64287 Darmstadt Germany
| | - Oliver Klimmek
- Microbial Energy Conversion and Biotechnology, Department of Biology; Technische Universität Darmstadt; Schnittspahnstraße 10 64287 Darmstadt Germany
| | - Markus Polly
- Microbial Energy Conversion and Biotechnology, Department of Biology; Technische Universität Darmstadt; Schnittspahnstraße 10 64287 Darmstadt Germany
| | - Melanie Kern
- Microbial Energy Conversion and Biotechnology, Department of Biology; Technische Universität Darmstadt; Schnittspahnstraße 10 64287 Darmstadt Germany
| | - Jörg Simon
- Microbial Energy Conversion and Biotechnology, Department of Biology; Technische Universität Darmstadt; Schnittspahnstraße 10 64287 Darmstadt Germany
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7
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Shen J, Peng H, Zhang Y, Trinidad JC, Giedroc DP. Staphylococcus aureus sqr Encodes a Type II Sulfide:Quinone Oxidoreductase and Impacts Reactive Sulfur Speciation in Cells. Biochemistry 2016; 55:6524-6534. [PMID: 27806570 DOI: 10.1021/acs.biochem.6b00714] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent studies implicate hydrogen sulfide (H2S) oxidation as an important aspect of bacterial antibiotic resistance and sulfide homeostasis. The cst operon of the major human pathogen Staphylococcus aureus is induced by exogenous H2S stress and encodes enzymes involved in sulfide oxidation, including a group I flavoprotein disulfide oxidoreductase sulfide:quinone oxidoreductase (SQR). In this work, we show that S. aureus SQR catalyzes the two-electron oxidation of sodium sulfide (Na2S) into sulfane sulfur (S0) when provided flavin adenine dinucleotide and a water-soluble quinone acceptor. Cyanide, sulfite, and coenzyme A (CoA) are all capable of functioning as the S0 acceptor in vitro. This activity requires a C167-C344 disulfide bond in the resting enzyme, with the intermediacy of a C344 persulfide in the catalytic cycle, verified by mass spectrometry of sulfide-reacted SQR. Incubation of purified SQR and S. aureus CstB, a known FeII persulfide dioxygenase-sulfurtransferase also encoded by the cst operon, yields thiosulfate from sulfide, in a CoA-dependent manner, thus confirming the intermediacy of CoASSH as a product and substrate of SQR and CstB, respectively. Sulfur metabolite profiling of wild-type, Δsqr, and Δsqr::pSQR strains reveals a marked and specific elevation in endogenous levels of CoASSH and inorganic tetrasulfide in the Δsqr strain. We conclude that SQR impacts the cellular speciation of these reactive sulfur species but implicates other mechanisms not dependent on SQR in the formation of low-molecular weight thiol persulfides and inorganic polysulfides during misregulation of sulfide homeostasis.
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Affiliation(s)
- Jiangchuan Shen
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Biochemistry Graduate Program, Indiana University , Bloomington, Indiana 47405, United States
| | - Hui Peng
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Biochemistry Graduate Program, Indiana University , Bloomington, Indiana 47405, United States
| | - Yixiang Zhang
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Laboratory for Biological Mass Spectrometry, Indiana University , Bloomington, Indiana 47405, United States
| | - Jonathan C Trinidad
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Laboratory for Biological Mass Spectrometry, Indiana University , Bloomington, Indiana 47405, United States
| | - David P Giedroc
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Department of Molecular and Cellular Biochemistry, Indiana University , Bloomington, Indiana 47405, United States
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8
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Chadar D, Camilles M, Patil R, Khan A, Weyhermüller T, Salunke-Gawali S. Synthesis and characterization of n-alkylamino derivatives of vitamin K3: Molecular structure of 2-propylamino-3-methyl-1,4-naphthoquinone and antibacterial activities. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.01.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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9
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Nasiri HR, Ferner J, Tükek C, Krishnathas R, Schwalbe H. A concise one-step synthesis of primin and iso-primin. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Jacobs N, Lang S, Panisch R, Wittstock G, Groth U, Nasiri HR. Investigation on the electrochemistry and cytotoxicity of the natural product marcanine A and its synthetic derivatives. RSC Adv 2015. [DOI: 10.1039/c5ra11078e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The electrochemistry and cytotoxicity of marcanine A were investigated by electrochemical, computational and cellular studies.
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Affiliation(s)
- Nadine Jacobs
- Carl von Ossietzky University of Oldenburg
- Faculty of Mathematics and Natural Sciences
- Institute of Chemistry
- D-26111 Oldenburg
- Germany
| | - Steffen Lang
- Fachbereich Chemie und Konstanz Research School Chemical Biology
- Universität Konstanz
- D-78457 Konstanz
- Germany
| | - Robin Panisch
- Johann Wolfgang Goethe-University Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - Gunther Wittstock
- Carl von Ossietzky University of Oldenburg
- Faculty of Mathematics and Natural Sciences
- Institute of Chemistry
- D-26111 Oldenburg
- Germany
| | - Ulrich Groth
- Fachbereich Chemie und Konstanz Research School Chemical Biology
- Universität Konstanz
- D-78457 Konstanz
- Germany
| | - Hamid R. Nasiri
- Johann Wolfgang Goethe-University Frankfurt
- D-60438 Frankfurt am Main
- Germany
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11
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Nasiri HR, Madej MG, Panisch R, Lafontaine M, Bats JW, Lancaster CRD, Schwalbe H. Design, Synthesis, and Biological Testing of Novel Naphthoquinones as Substrate-Based Inhibitors of the Quinol/Fumarate Reductase from Wolinella succinogenes. J Med Chem 2013; 56:9530-41. [DOI: 10.1021/jm400978u] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hamid Reza Nasiri
- Institute
of Organic Chemistry and Chemical Biology, Center for Biomolecular
Magnetic Resonance, Johann Wolfgang Goethe-University Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
| | - M. Gregor Madej
- Department of
Molecular Membrane Biology, Cluster of Excellence Frankfurt “Macromolecular
Complexes,” Max Planck Institute of Biophysics, Max-von-Laue-Straße 3, D-60438 Frankfurt am Main, Germany
| | - Robin Panisch
- Institute
of Inorganic and Analytical Chemistry, Johann Wolfgang Goethe-University Frankfurt, Max-von-Laue-Straße 7, D-60438 Frankfurt am Main, Germany
| | - Michael Lafontaine
- Department
of Structural Biology, Center of Human and Molecular Biology, Faculty
of Medicine, Saarland University, Building 60, D-66421 Homburg, Germany
| | - Jan W. Bats
- Institute
of Organic Chemistry and Chemical Biology, Center for Biomolecular
Magnetic Resonance, Johann Wolfgang Goethe-University Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
| | - C. Roy D. Lancaster
- Department of
Molecular Membrane Biology, Cluster of Excellence Frankfurt “Macromolecular
Complexes,” Max Planck Institute of Biophysics, Max-von-Laue-Straße 3, D-60438 Frankfurt am Main, Germany
- Department
of Structural Biology, Center of Human and Molecular Biology, Faculty
of Medicine, Saarland University, Building 60, D-66421 Homburg, Germany
| | - Harald Schwalbe
- Institute
of Organic Chemistry and Chemical Biology, Center for Biomolecular
Magnetic Resonance, Johann Wolfgang Goethe-University Frankfurt, Max-von-Laue-Straße
7, D-60438 Frankfurt
am Main, Germany
- German Cancer Consortium
(DKTK), 69120 Heidelberg, Germany
- German Cancer
Research Center (DKFZ), 69120 Heidelberg, Germany
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12
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Angerer H, Nasiri HR, Niedergesäß V, Kerscher S, Schwalbe H, Brandt U. Tracing the tail of ubiquinone in mitochondrial complex I. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:1776-84. [PMID: 22484275 DOI: 10.1016/j.bbabio.2012.03.021] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 03/20/2012] [Accepted: 03/21/2012] [Indexed: 12/01/2022]
Abstract
Mitochondrial complex I (proton pumping NADH:ubiquinone oxidoreductase) is the largest and most complicated component of the respiratory electron transfer chain. Despite its central role in biological energy conversion the structure and function of this membrane integral multiprotein complex is still poorly understood. Recent insights into the structure of complex I by X-ray crystallography have shown that iron-sulfur cluster N2, the immediate electron donor for ubiquinone, resides about 30Å above the membrane domain and mutagenesis studies suggested that the active site for the hydrophobic substrate is located next to this redox-center. To trace the path for the hydrophobic tail of ubiquinone when it enters the peripheral arm of complex I, we performed an extensive structure/function analysis of complex I from Yarrowia lipolytica monitoring the interaction of site-directed mutants with five ubiquinone derivatives carrying different tails. The catalytic activity of a subset of mutants was strictly dependent on the presence of intact isoprenoid moieties in the tail. Overall a consistent picture emerged suggesting that the tail of ubiquinone enters through a narrow path at the interface between the 49-kDa and PSST subunits. Most notably we identified a set of methionines that seems to form a hydrophobic gate to the active site reminiscent to the M-domains involved in the interaction with hydrophobic targeting sequences with the signal recognition particle of the endoplasmic reticulum. Interestingly, two of the amino acids critical for the interaction with the ubiquinone tail are different in bovine complex I and we could show that one of these exchanges is responsible for the lower sensitivity of Y. lipolytica complex I towards the inhibitor rotenone. This article is part of a Special Issue entitled: 17th European Bioenergetics Conference (EBEC 2012).
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Affiliation(s)
- Heike Angerer
- Goethe-University, Theodor-Stern-Kai 7, Frankfurt am Main, Germany
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13
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Ionization energy and electron affinity of oligoglycines: a CAM-B3LYP density functional theory study. MONATSHEFTE FUR CHEMIE 2012. [DOI: 10.1007/s00706-011-0700-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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15
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Yang JE, Yoon JH, Won MS, Shim YB. Electrochemical and Spectroelectrochemical Behaviors of Vitamin K1/Lipid Modified Electrodes and the Formation of Radical Anion in Aqueous Media. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.11.3133] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Kayashima T, Mori M, Mizutani R, Nishio K, Kuramochi K, Tsubaki K, Yoshida H, Mizushina Y, Matsubara K. Synthesis and biological evaluation of vitamin K derivatives as angiogenesis inhibitor. Bioorg Med Chem 2010; 18:6305-9. [PMID: 20688522 DOI: 10.1016/j.bmc.2010.07.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2010] [Revised: 07/08/2010] [Accepted: 07/09/2010] [Indexed: 11/30/2022]
Abstract
Ten vitamin K(3) derivatives were synthesized and screened for anti-angiogenic activity. Results indicated that amine derivatives (1a-d) exerted a stronger inhibition effect on angiogenesis compared to alkyl derivatives (2a-d). In addition to being the most potent inhibitor, 1b also suppressed human umbilical vein endothelial cell tube formation and proliferation. These results suggest that vitamin K(3) amine derivatives with shorter alkyl chains, such as 1b, could be useful for developing anti-angiogenic agents.
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Affiliation(s)
- Tomoko Kayashima
- Department of Human Life Science Education, Graduate School of Education, Hiroshima University, 1-1-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8524, Japan.
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