1
|
Xu Y, Xu Y, Biby S, Bai P, Liu Y, Zhang C, Wang C, Zhang S. Novel Positron Emission Tomography Radiotracers for Imaging Mitochondrial Complex I. ACS Chem Neurosci 2021; 12:4491-4499. [PMID: 34812607 PMCID: PMC10071493 DOI: 10.1021/acschemneuro.1c00297] [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: 11/30/2022] Open
Abstract
Mitochondrial dysfunction has been indicated in neurodegenerative and other disorders. The mitochondrial complex I (MC-I) of the electron transport chain (ETC) on the inner membrane is the electron entry point of the ETC and is essential for the production of reactive oxygen species. Based on a recently identified β-keto-amide type MC-I modulator from our laboratory, an 18F-labeled positron emission tomography (PET) tracer, 18F-2, was prepared. PET/CT imaging studies demonstrated that 18F-2 exhibited rapid brain uptake without significant wash out during the 60 min scanning time. In addition, the binding of 18F-2 was higher in the regions of the brain stem, cerebellum, and midbrain. The uptake of 18F-2 can be significantly blocked by its parent compound. Collectively, the results strongly suggest successful development of MC-I PET tracers from this chemical scaffold that can be used in future mitochondrial dysfunction studies of the central nervous system.
Collapse
Affiliation(s)
- Yulong Xu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Yiming Xu
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Savannah Biby
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Ping Bai
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Yan Liu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Can Zhang
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Genetics and Aging Research Unit, McCance Center for Brain Health, Mass General Institute for Neurodegenerative Disease, Charlestown, Massachusetts 02129, United States
| | - Changning Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Shijun Zhang
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| |
Collapse
|
2
|
Sharma V, Imhof P, Hellwig P. Editorial: Computational and Experimental Insights in Redox-Coupled Proton Pumping in Proteins. Front Chem 2021; 9:762612. [PMID: 34604180 PMCID: PMC8479093 DOI: 10.3389/fchem.2021.762612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 09/03/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Petra Imhof
- Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | | |
Collapse
|
3
|
Nuber F, Mérono L, Oppermann S, Schimpf J, Wohlwend D, Friedrich T. A Quinol Anion as Catalytic Intermediate Coupling Proton Translocation With Electron Transfer in E. coli Respiratory Complex I. Front Chem 2021; 9:672969. [PMID: 34026733 PMCID: PMC8138167 DOI: 10.3389/fchem.2021.672969] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/09/2021] [Indexed: 11/18/2022] Open
Abstract
Energy-converting NADH:ubiquinone oxidoreductase, respiratory complex I, plays a major role in cellular energy metabolism. It couples NADH oxidation and quinone reduction with the translocation of protons across the membrane, thus contributing to the protonmotive force. Complex I has an overall L-shaped structure with a peripheral arm catalyzing electron transfer and a membrane arm engaged in proton translocation. Although both reactions are arranged spatially separated, they are tightly coupled by a mechanism that is not fully understood. Using redox-difference UV-vis spectroscopy, an unknown redox component was identified in Escherichia coli complex I as reported earlier. A comparison of its spectrum with those obtained for different quinone species indicates features of a quinol anion. The re-oxidation kinetics of the quinol anion intermediate is significantly slower in the D213GH variant that was previously shown to operate with disturbed quinone chemistry. Addition of the quinone-site inhibitor piericidin A led to strongly decreased absorption peaks in the difference spectrum. A hypothesis for a mechanism of proton-coupled electron transfer with the quinol anion as catalytically important intermediate in complex I is discussed.
Collapse
Affiliation(s)
- Franziska Nuber
- Institut für Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany
| | - Luca Mérono
- Institut für Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany
| | - Sabrina Oppermann
- Institut für Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany
| | - Johannes Schimpf
- Institut für Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany
| | - Daniel Wohlwend
- Institut für Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany
| | | |
Collapse
|
4
|
A comprehensive review on quinones based fluoride selective colorimetric and fluorescence chemosensors. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109744] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
5
|
Voicescu M, Craciunescu O, Angelescu DG, Tatia R, Moldovan L. Spectroscopic, molecular dynamics simulation and biological studies of Flavin MonoNucleotide and Flavin Adenine Dinucleotide in biomimetic systems. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:118997. [PMID: 33032115 DOI: 10.1016/j.saa.2020.118997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/11/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
The present study describes a comprehensive investigation of the spectroscopic characteristics, stability and in vitro antioxidant and cytotoxic properties of the Flavin MonoNucleotide (FMN) and Flavin Adenine Dinucleotide (FAD) in Dextran70 (Dx70) and Dx70/phospatidylcholine (PC) biomimetic systems by means of the UV-Vis absorption, fluorescence spectroscopy, chemiluminescence and Neutral Red assay. The affinity of FMN, FAD and the precursor riboflavin (RF) to an unsaturated phospholipid bilayer model as well as the location of the probes within the lipid bilayer were assessed from united-atom molecular dynamics simulations carried out on an unsaturated phospholipid bilayer model system, and the theoretical and experimental characterization of the two probes within biomembranes was complemented with the light microscopy survey of the cell morphology of L929 fibroblast cells cultivated in the presence of various dosage of FAD/FMN. In lipid bilayers, FMN/FAD resulted in a noticeable improvement of the antioxidant activity (the scavenging of reactive oxygen species up to 40%) and a significant effect on cellular viability in the L929 fibroblast cells. The results are important in the oxidative stress process concerning the redox reactions of flavins in humans as well as in further studies on different systems belonging to the category of flavoenzymes/flavoproteins, required for cellular respiration.
Collapse
Affiliation(s)
- Mariana Voicescu
- Romanian Academy, Institute of Physical Chemistry "Ilie Murgulescu", Splaiul Independentei 202, 060021 Bucharest, Romania.
| | - Oana Craciunescu
- Department of Cellular and Molecular Biology, National Institute of R&D for Biological Sciences, Splaiul Independentei 296, 060031 Bucharest, Romania
| | - Daniel G Angelescu
- Romanian Academy, Institute of Physical Chemistry "Ilie Murgulescu", Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Rodica Tatia
- Department of Cellular and Molecular Biology, National Institute of R&D for Biological Sciences, Splaiul Independentei 296, 060031 Bucharest, Romania
| | - Lucia Moldovan
- Department of Cellular and Molecular Biology, National Institute of R&D for Biological Sciences, Splaiul Independentei 296, 060031 Bucharest, Romania
| |
Collapse
|
6
|
Verkhovskaya M, Belevich N. Fluorescent signals associated with respiratory Complex I revealed conformational changes in the catalytic site. FEMS Microbiol Lett 2020; 366:5530755. [PMID: 31291453 DOI: 10.1093/femsle/fnz155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 07/09/2019] [Indexed: 11/14/2022] Open
Abstract
Fluorescent signals associated with Complex I (NADH:ubiquinone oxidoreductase type I) upon its reduction by NADH without added acceptors and upon NADH:ubiquinone oxidoreduction were studied. Two Complex I-associated redox-dependent signals were observed: with maximum emission at 400 nm (λex = 320 nm) and 526 nm (λex = 450 nm). The 400 nm signal derived from ubiquinol accumulated in Complex I/DDM (n-dodecyl β-D-maltopyranoside) micelles. The 526 nm redox signal unexpectedly derives mainly from FMN (flavin mononucleotide), whose fluorescence in oxidized protein is fully quenched, but arises transiently upon reduction of Complex I by NADH. The paradoxical flare-up of FMN fluorescence is discussed in terms of conformational changes in the catalytic site upon NADH binding. The difficulties in revealing semiquinone fluorescent signal are considered.
Collapse
Affiliation(s)
- Marina Verkhovskaya
- Institute of Biotechnology, PO Box 65 (Viikinkaari 1) FIN-00014, University of Helsinki, Finland
| | - Nikolai Belevich
- Institute of Biotechnology, PO Box 65 (Viikinkaari 1) FIN-00014, University of Helsinki, Finland
| |
Collapse
|
7
|
Grytsyk N, Boubegtiten-Fezoua Z, Javahiraly N, Omeis F, Devaux E, Hellwig P. Surface-enhanced resonance Raman spectroscopy of heme proteins on a gold grid electrode. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 230:118081. [PMID: 32000061 DOI: 10.1016/j.saa.2020.118081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/13/2020] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
The combination of surface-enhanced resonance Raman spectroscopy (SERRS) and electrochemistry is an ideal tool to study the redox process of the heme proteins and is often performed on silver electrodes. In this manuscript, we present an approach using a microstructured gold surface that serves as the electrochemical working electrode, and at the same time, acts as SERS active substrate. The cell requires a micromolar concentration of sample at the electrode surface. Even if the performance of the gold grid as SERS substrate exhibited a smaller enhancement factor than expected for silver, oxidized and reduced spectra of proteins (Сyt c, Hb and Mb) monolayers could be obtained and the characteristic redox dependent shifts of the marker bands ν19, ν4 and ν10 were seen. The easy modification protocol and the higher stability of the gold electrode towards oxidative currents are the advantages of the present spectroeletrochemical cell. Finally, FDTD simulations confirm that the roughness of the gold grid has an effect on the Raman enhancement of the adsorbed proteins.
Collapse
Affiliation(s)
- Natalia Grytsyk
- Laboratoire de Bioélectrochimie et Spectroscopie, UMR 7140 Université de Strasbourg CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Zahia Boubegtiten-Fezoua
- Laboratoire de Bioélectrochimie et Spectroscopie, UMR 7140 Université de Strasbourg CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Nicolas Javahiraly
- Laboratoire ICube UMR 7357 Université de Strasbourg CNRS, 23 rue du Loess, 67037 Strasbourg, France
| | - Fatima Omeis
- Laboratoire de Bioélectrochimie et Spectroscopie, UMR 7140 Université de Strasbourg CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France
| | - Eloise Devaux
- Laboratoire des nanostructures, Institut ISIS UMR 7006 Université de Strasbourg CNRS, 8 allée Gaspard Monge, 67083 Strasbourg, France
| | - Petra Hellwig
- Laboratoire de Bioélectrochimie et Spectroscopie, UMR 7140 Université de Strasbourg CNRS, 4 Rue Blaise Pascal, 67081 Strasbourg, France; University of Strasbourg Institute for Advanced Studies (USIAS), France.
| |
Collapse
|
8
|
Hagras MA, Stuchebrukhov AA. Concerted Two-Electron Reduction of Ubiquinone in Respiratory Complex I. J Phys Chem B 2019; 123:5265-5273. [DOI: 10.1021/acs.jpcb.9b04082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Muhammad A. Hagras
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Alexei A. Stuchebrukhov
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| |
Collapse
|
9
|
Hirst J, Roessler MM. Energy conversion, redox catalysis and generation of reactive oxygen species by respiratory complex I. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1857:872-83. [PMID: 26721206 PMCID: PMC4893023 DOI: 10.1016/j.bbabio.2015.12.009] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 12/30/2022]
Abstract
Complex I (NADH:ubiquinone oxidoreductase) is critical for respiration in mammalian mitochondria. It oxidizes NADH produced by the Krebs' tricarboxylic acid cycle and β-oxidation of fatty acids, reduces ubiquinone, and transports protons to contribute to the proton-motive force across the inner membrane. Complex I is also a significant contributor to cellular oxidative stress. In complex I, NADH oxidation by a flavin mononucleotide, followed by intramolecular electron transfer along a chain of iron–sulfur clusters, delivers electrons and energy to bound ubiquinone. Either at cluster N2 (the terminal cluster in the chain) or upon the binding/reduction/dissociation of ubiquinone/ubiquinol, energy from the redox process is captured to initiate long-range energy transfer through the complex and drive proton translocation. This review focuses on current knowledge of how the redox reaction and proton transfer are coupled, with particular emphasis on the formation and role of semiquinone intermediates in both energy transduction and reactive oxygen species production. This article is part of a Special Issue entitled Respiratory complex I, edited by Volker Zickermann and Ulrich Brandt. Current knowledge of the redox reactions catalyzed by complex I is reviewed. Possible quinone reduction pathways are presented. The presence and number of semiquinone intermediates are deliberated. The involvement of cluster N2/semiquinones in coupled proton transfer is discussed. Evidence for reactive oxygen species production by semiquinones is examined.
Collapse
Affiliation(s)
- Judy Hirst
- Medical Research Council Mitochondrial Biology Unit, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY, United Kingdom.
| | - Maxie M Roessler
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom.
| |
Collapse
|
10
|
Hellwig P, Kriegel S, Friedrich T. Infrared spectroscopic studies on reaction induced conformational changes in the NADH ubiquinone oxidoreductase (complex I). BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1857:922-7. [PMID: 26702948 DOI: 10.1016/j.bbabio.2015.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 12/08/2015] [Accepted: 12/14/2015] [Indexed: 10/22/2022]
Abstract
Redox-dependent conformational changes are currently discussed to be a crucial part of the reaction mechanism of the respiratory complex I. Specialized difference Fourier transform infrared techniques allow the detection of side-chain movements and minute secondary structure changes. For complex I, (1)H/(2)H exchange kinetics of the amide modes revealed a better accessibility of the backbone in the presence of NADH and quinone. Interestingly, the presence of phospholipids, that is crucial for the catalytic activity of the isolated enzyme complex, changes the overall conformation. When comparing complex I samples from different species, very similar electrochemically induced FTIR difference spectra and very similar rearrangements are reported. Finally, the information obtained with variants and from Zn(2+) inhibited samples for the conformational reorganization of complex I upon electron transfer are discussed in this review. This article is part of a Special Issue entitled Respiratory complex I, edited by Volker Zickermann and Ulrich Brandt.
Collapse
Affiliation(s)
- Petra Hellwig
- Laboratoire de bioelectrochimie et spectroscopie, UMR 7140, Chimie de la Matière Complexe, Université de Strasbourg-CNRS, Strasbourg, France
| | - Sébastien Kriegel
- Laboratoire de bioelectrochimie et spectroscopie, UMR 7140, Chimie de la Matière Complexe, Université de Strasbourg-CNRS, Strasbourg, France
| | - Thorsten Friedrich
- Albert-Ludwigs-Universität Freiburg, Institut für Biochemie, Albertstr. 21, 79104 Freiburg i. Br., Germany
| |
Collapse
|
11
|
Gutiérrez-Sanz O, Olea D, Pita M, Batista AP, Alonso A, Pereira MM, Vélez M, De Lacey AL. Reconstitution of respiratory complex I on a biomimetic membrane supported on gold electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9007-9015. [PMID: 24988043 DOI: 10.1021/la501825r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
For the first time, respiratory complex I has been reconstituted on an electrode preserving its structure and activity. Respiratory complex I is a membrane-bound enzyme that has an essential function in cellular energy production. It couples NADH:quinone oxidoreduction to translocation of ions across the cellular (in prokaryotes) or mitochondrial membranes. Therefore, complex I contributes to the establishment and maintenance of the transmembrane difference of electrochemical potential required for adenosine triphosphate synthesis, transport, and motility. Our new strategy has been applied for reconstituting the bacterial complex I from Rhodothermus marinus onto a biomimetic membrane supported on gold electrodes modified with a thiol self-assembled monolayer (SAM). Atomic force microscopy and faradaic impedance measurements give evidence of the biomimetic construction, whereas electrochemical measurements show its functionality. Both electron transfer and proton translocation by respiratory complex I were monitored, simulating in vivo conditions.
Collapse
Affiliation(s)
- Oscar Gutiérrez-Sanz
- Instituto de Catalisis y Petroleoquímica, CSIC, c/Marie Curie 2, L10, 28049 Madrid, Spain
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Friedrich T. On the mechanism of respiratory complex I. J Bioenerg Biomembr 2014; 46:255-68. [PMID: 25022766 DOI: 10.1007/s10863-014-9566-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 07/03/2014] [Indexed: 02/08/2023]
Abstract
The energy-converting NADH:ubiquinone oxidoreductase, respiratory complex I, couples the transfer of electrons from NADH to ubiquinone with the translocation of protons across the membrane. Electron microscopy and X-ray crystallography revealed the two-part structure of the enzyme complex. A peripheral arm extending into the aqueous phase catalyzes the electron transfer reaction. Accordingly, this arm contains the redox-active cofactors, namely one flavin mononucleotide (FMN) and up to ten iron-sulfur (Fe/S) clusters. A membrane arm embedded in the lipid bilayer catalyzes proton translocation by a yet unknown mechanism. The binding site of the substrate (ubi) quinone is located at the interface of the two arms. The oxidation of one NADH is coupled with the translocation of four protons across the membrane. In this review, the binding of the substrates, the intramolecular electron transfer, the role of individual Fe/S clusters and the mechanism of proton translocation are discussed in the light of recent data obtained from our laboratory.
Collapse
Affiliation(s)
- Thorsten Friedrich
- Institut für Biochemie, Albert-Ludwigs-Universität, Albertstr. 21, 79104, Freiburg, Germany,
| |
Collapse
|