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Identification of a Ubiquinone–Ubiquinol Quinhydrone Complex in Bacterial Photosynthetic Membranes and Isolated Reaction Centers by Time-Resolved Infrared Spectroscopy. Int J Mol Sci 2023; 24:ijms24065233. [PMID: 36982307 PMCID: PMC10049466 DOI: 10.3390/ijms24065233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 03/11/2023] Open
Abstract
Ubiquinone redox chemistry is of fundamental importance in biochemistry, notably in bioenergetics. The bi-electronic reduction of ubiquinone to ubiquinol has been widely studied, including by Fourier transform infrared (FTIR) difference spectroscopy, in several systems. In this paper, we have recorded static and time-resolved FTIR difference spectra reflecting light-induced ubiquinone reduction to ubiquinol in bacterial photosynthetic membranes and in detergent-isolated photosynthetic bacterial reaction centers. We found compelling evidence that in both systems under strong light illumination—and also in detergent-isolated reaction centers after two saturating flashes—a ubiquinone–ubiquinol charge-transfer quinhydrone complex, characterized by a characteristic band at ~1565 cm−1, can be formed. Quantum chemistry calculations confirmed that such a band is due to formation of a quinhydrone complex. We propose that the formation of such a complex takes place when Q and QH2 are forced, by spatial constraints, to share a common limited space as, for instance, in detergent micelles, or when an incoming quinone from the pool meets, in the channel for quinone/quinol exchange at the QB site, a quinol coming out. This latter situation can take place both in isolated and membrane bound reaction centers Possible consequences of the formation of this charge-transfer complex under physiological conditions are discussed.
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Kimura Y, Tani K, Madigan MT, Wang-Otomo ZY. Advances in the Spectroscopic and Structural Characterization of Core Light-Harvesting Complexes from Purple Phototrophic Bacteria. J Phys Chem B 2023; 127:6-17. [PMID: 36594654 DOI: 10.1021/acs.jpcb.2c06638] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Purple phototrophic bacteria are ancient anoxygenic phototrophs and attractive research tools because they capture light energy in the near-infrared (NIR) region of the spectrum and transform it into chemical energy by way of uphill energy transfers. The heart of this reaction occurs in light-harvesting 1-reaction center (LH1-RC) complexes, which are the simplest model systems for understanding basic photosynthetic reactions within type-II (quinone-utilizing) reaction centers. In this Perspective, we highlight structure-function relationships concerning unresolved fundamental processes in purple bacterial photosynthesis, including the diversified light-harvesting capacity of LH1-associated BChl molecules, energies necessary for photoelectric conversion in the RC special pairs, and quinone transport mechanisms. Based on recent progress in the spectroscopic and structural analysis of LH1-RC complexes from a variety of purple phototrophs, we discuss several key factors for understanding how purple bacteria resource light energy in the inherently energy-poor NIR region of the electromagnetic spectrum.
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Affiliation(s)
- Yukihiro Kimura
- Department of Agrobioscience, Graduate School of Agriculture, Kobe University, Nada, Kobe 657-8501, Japan
| | - Kazutoshi Tani
- Graduate School of Medicine, Mie University, Tsu 514-8507, Japan
| | - Michael T Madigan
- Department of Microbiology, School of Biological Sciences, Southern Illinois University, Carbondale, Illinois 62901, United States
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3
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Time-resolved infrared absorption spectroscopy applied to photoinduced reactions: how and why. Photochem Photobiol Sci 2022; 21:557-584. [DOI: 10.1007/s43630-022-00180-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/28/2022] [Indexed: 10/19/2022]
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Knox PP, Lukashev EP, Korvatovskii BN, Seifullina NK, Goryachev SN, Allakhverdiev ES, Paschenko VZ. Effect of Dipyridamole on Membrane Energization and Energy Transfer in Chromatophores of Rba. sphaeroides. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:1138-1148. [PMID: 36273882 PMCID: PMC9568914 DOI: 10.1134/s0006297922100078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Effect of dipyridamole (DIP) at concentrations up to 1 mM on fluorescent characteristics of light-harvesting complexes LH2 and LH1, as well as on conditions of photosynthetic electron transport chain in the bacterial chromatophores of Rba. sphaeroides was investigated. DIP was found to affect efficiency of energy transfer from the light-harvesting complex LH2 to the LH1-reaction center core complex and to produce the long-wavelength ("red") shift of the absorption band of light-harvesting bacteriochlorophyll molecules in the IR spectral region at 840-900 nm. This shift is associated with the membrane transition to the energized state. It was shown that DIP is able to reduce the photooxidized bacteriochlorophyll of the reaction center, which accelerated electron flow along the electron transport chain, thereby stimulating generation of the transmembrane potential on the chromatophore membrane. The results are important for clarifying possible mechanisms of DIP influence on the activity of membrane-bound functional proteins. In particular, they might be significant for interpreting numerous therapeutic effects of DIP.
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Affiliation(s)
- Peter P. Knox
- Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Eugene P. Lukashev
- Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | | | | | - Sergey N. Goryachev
- Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
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Quinone transport in the closed light-harvesting 1 reaction center complex from the thermophilic purple bacterium Thermochromatium tepidum. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2020; 1862:148307. [PMID: 32926863 DOI: 10.1016/j.bbabio.2020.148307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/03/2020] [Accepted: 09/09/2020] [Indexed: 11/22/2022]
Abstract
Redox-active quinones play essential roles in efficient light energy conversion in type-II reaction centers of purple phototrophic bacteria. In the light-harvesting 1 reaction center (LH1-RC) complex of purple bacteria, QB is converted to QBH2 upon light-induced reduction and QBH2 is transported to the quinone pool in the membrane through the LH1 ring. In the purple bacterium Rhodobacter sphaeroides, the C-shaped LH1 ring contains a gap for quinone transport. In contrast, the thermophilic purple bacterium Thermochromatium (Tch.) tepidum has a closed O-shaped LH1 ring that lacks a gap, and hence the mechanism of photosynthetic quinone transport is unclear. Here we detected light-induced Fourier transform infrared (FTIR) signals responsible for changes of QB and its binding site that accompany photosynthetic quinone reduction in Tch. tepidum and characterized QB and QBH2 marker bands based on their 15N- and 13C-isotopic shifts. Quinone exchanges were monitored using reconstituted photosynthetic membranes comprised of solubilized photosynthetic proteins, membrane lipids, and exogenous ubiquinone (UQ) molecules. In combination with 13C-labeling of the LH1-RC and replacement of native UQ8 by ubiquinones of different tail lengths, we demonstrated that quinone exchanges occur efficiently within the hydrophobic environment of the lipid membrane and depend on the side chain length of UQ. These results strongly indicate that unlike the process in Rba. sphaeroides, quinone transport in Tch. tepidum occurs through the size-restricted hydrophobic channels in the closed LH1 ring and are consistent with structural studies that have revealed narrow hydrophobic channels in the Tch. tepidum LH1 transmembrane region.
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Abstract
Infrared difference spectroscopy probes vibrational changes of proteins upon their perturbation. Compared with other spectroscopic methods, it stands out by its sensitivity to the protonation state, H-bonding, and the conformation of different groups in proteins, including the peptide backbone, amino acid side chains, internal water molecules, or cofactors. In particular, the detection of protonation and H-bonding changes in a time-resolved manner, not easily obtained by other techniques, is one of the most successful applications of IR difference spectroscopy. The present review deals with the use of perturbations designed to specifically change the protein between two (or more) functionally relevant states, a strategy often referred to as reaction-induced IR difference spectroscopy. In the first half of this contribution, I review the technique of reaction-induced IR difference spectroscopy of proteins, with special emphasis given to the preparation of suitable samples and their characterization, strategies for the perturbation of proteins, and methodologies for time-resolved measurements (from nanoseconds to minutes). The second half of this contribution focuses on the spectral interpretation. It starts by reviewing how changes in H-bonding, medium polarity, and vibrational coupling affect vibrational frequencies, intensities, and bandwidths. It is followed by band assignments, a crucial aspect mostly performed with the help of isotopic labeling and site-directed mutagenesis, and complemented by integration and interpretation of the results in the context of the studied protein, an aspect increasingly supported by spectral calculations. Selected examples from the literature, predominately but not exclusively from retinal proteins, are used to illustrate the topics covered in this review.
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Mezzetti A, Alexandre M, Thurotte A, Wilson A, Gwizdala M, Kirilovsky D. Two-Step Structural Changes in Orange Carotenoid Protein Photoactivation Revealed by Time-Resolved Fourier Transform Infrared Spectroscopy. J Phys Chem B 2019; 123:3259-3266. [DOI: 10.1021/acs.jpcb.9b01242] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alberto Mezzetti
- Sorbonne Université, CNRS, Laboratoire Réactivité de Surface, UMR CNRS 7197, F-75252 Paris, France
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
| | - Maxime Alexandre
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
- Department of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Adrien Thurotte
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
- Metabolism, Engineering of Microalgal Molecules and Applications (MIMMA) Team, Mer, Molécules, Santé/Sea, Molecules & Health (EA2160), Département de Biologie et Géosciences, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France
| | - Adjelé Wilson
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
| | - Michal Gwizdala
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
- Department of Physics, Faculty of Natural and Agricultural Sciences, University of Pretoria, Private bag X20, 0028 Hatfield, South Africa
- Department of Physics and Astronomy, Faculty of Sciences, VU University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Diana Kirilovsky
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
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Knox PP, Lukashev EP, Seifullina NK, Gorokhov VV, Rubin AB. The influence of dipyridamole and its derivatives on the membrane energization state of Rhodobacter sphaeroides bacterial chromatophores. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917050153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Mezzetti A, Leibl W. Time-resolved infrared spectroscopy in the study of photosynthetic systems. PHOTOSYNTHESIS RESEARCH 2017; 131:121-144. [PMID: 27678250 DOI: 10.1007/s11120-016-0305-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 09/05/2016] [Indexed: 06/06/2023]
Abstract
Time-resolved (TR) infrared (IR) spectroscopy in the nanosecond to second timescale has been extensively used, in the last 30 years, in the study of photosynthetic systems. Interesting results have also been obtained at lower time resolution (minutes or even hours). In this review, we first describe the used techniques-dispersive IR, laser diode IR, rapid-scan Fourier transform (FT)IR, step-scan FTIR-underlying the advantages and disadvantages of each of them. Then, the main TR-IR results obtained so far in the investigation of photosynthetic reactions (in reaction centers, in light-harvesting systems, but also in entire membranes or even in living organisms) are presented. Finally, after the general conclusions, the perspectives in the field of TR-IR applied to photosynthesis are described.
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Affiliation(s)
- Alberto Mezzetti
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7197, Laboratoire de Réactivité de Surfaces, 4 Pl. Jussieu, 75005, Paris, France.
- Institut de Biologie Intégrative de la Cellule (I2BC), IBITECS, CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France.
| | - Winfried Leibl
- Institut de Biologie Intégrative de la Cellule (I2BC), IBITECS, CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France
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Naumann RLC, Geiss AF, Steininger C, Knoll W. Biomimetic Membranes for Multi-Redox Center Proteins. Int J Mol Sci 2016; 17:330. [PMID: 26950120 PMCID: PMC4813192 DOI: 10.3390/ijms17030330] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/27/2015] [Accepted: 02/17/2016] [Indexed: 11/22/2022] Open
Abstract
His-tag technology was applied for biosensing purposes involving multi-redox center proteins (MRPs). An overview is presented on various surfaces ranging from flat to spherical and modified with linker molecules with nitrile-tri-acetic acid (NTA) terminal groups to bind his-tagged proteins in a strict orientation. The bound proteins are submitted to in situ dialysis in the presence of lipid micelles to form a so-called protein-tethered bilayer lipid membrane (ptBLM). MRPs, such as the cytochrome c oxidase (CcO) from R. sphaeroides and P. denitrificans, as well as photosynthetic reactions centers (RCs) from R. sphaeroides, were thus investigated. Electrochemical and surface-sensitive optical techniques, such as surface plasmon resonance, surface plasmon-enhanced fluorescence, surface-enhanced infrared absorption spectroscopy (SEIRAS) and surface-enhanced resonance Raman spectroscopy (SERRS), were employed in the case of the ptBLM structure on flat surfaces. Spherical particles ranging from µm size agarose gel beads to nm size nanoparticles modified in a similar fashion were called proteo-lipobeads (PLBs). The particles were investigated by laser-scanning confocal fluorescence microscopy (LSM) and UV/Vis spectroscopy. Electron and proton transfer through the proteins were demonstrated to take place, which was strongly affected by the membrane potential. MRPs can thus be used for biosensing purposes under quasi-physiological conditions.
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Affiliation(s)
- Renate L C Naumann
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| | - Andreas F Geiss
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| | - Christoph Steininger
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| | - Wolfgang Knoll
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
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Light-Induced Infrared Difference Spectroscopy in the Investigation of Light Harvesting Complexes. Molecules 2015; 20:12229-49. [PMID: 26151118 PMCID: PMC6332223 DOI: 10.3390/molecules200712229] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 01/24/2023] Open
Abstract
Light-induced infrared difference spectroscopy (IR-DS) has been used, especially in the last decade, to investigate early photophysics, energy transfer and photoprotection mechanisms in isolated and membrane-bound light harvesting complexes (LHCs). The technique has the definite advantage to give information on how the pigments and the other constituents of the biological system (proteins, membranes, etc.) evolve during a given photoreaction. Different static and time-resolved approaches have been used. Compared to the application of IR-DS to photosynthetic Reaction Centers (RCs), however, IR-DS applied to LHCs is still in an almost pioneering age: very often sophisticated techniques (step-scan FTIR, ultrafast IR) or data analysis strategies (global analysis, target analysis, multivariate curve resolution) are needed. In addition, band assignment is usually more complicated than in RCs. The results obtained on the studied systems (chromatophores and RC-LHC supercomplexes from purple bacteria; Peridinin-Chlorophyll-a-Proteins from dinoflagellates; isolated LHCII from plants; thylakoids; Orange Carotenoid Protein from cyanobacteria) are summarized. A description of the different IR-DS techniques used is also provided, and the most stimulating perspectives are also described. Especially if used synergically with other biophysical techniques, light-induced IR-DS represents an important tool in the investigation of photophysical/photochemical reactions in LHCs and LHC-containing systems.
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Kimura Y, Kawakami T, Yu LJ, Yoshimura M, Kobayashi M, Wang-Otomo ZY. Characterization of the quinones in purple sulfur bacteriumThermochromatium tepidum. FEBS Lett 2015; 589:1761-5. [DOI: 10.1016/j.febslet.2015.05.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 05/21/2015] [Accepted: 05/22/2015] [Indexed: 11/27/2022]
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Hellwig P. Infrared spectroscopic markers of quinones in proteins from the respiratory chain. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1847:126-33. [PMID: 25026472 DOI: 10.1016/j.bbabio.2014.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/03/2014] [Accepted: 07/07/2014] [Indexed: 01/12/2023]
Abstract
In bioenergetic systems quinones play a central part in the coupling of electron and proton transfer. The specific function of each quinone binding site is based on the protein-quinone interaction that can be described by means of reaction induced FTIR difference spectroscopy, induced for example by light or electrochemically. The identification of sites in enzymes from the respiratory chain is presented together with the analysis of the accommodation of different types of quinones to the same enzyme and the possibility to monitor the interaction with inhibitors. Reaction induced FTIR difference spectroscopy is shown to give an essential information on the general geometry of quinone binding sites, the conformation of the ring and of the substituents as well as essential structural information on the identity of the amino-acid residues lining this site. This article is part of a Special Issue entitled: Vibrational spectroscopies and bioenergetic systems.
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Affiliation(s)
- Petra Hellwig
- Laboratoire de bioélectrochimie et spectroscopie, UMR 7140, Chimie de la matière complexe, Université de Strasbourg, 1, rue Blaise Pascal, 67008 Strasbourg, France.
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Mezzetti A, Blanchet L, de Juan A, Leibl W, Ruckebusch C. Ubiquinol formation in isolated photosynthetic reaction centres monitored by time-resolved differential FTIR in combination with 2D correlation spectroscopy and multivariate curve resolution. Anal Bioanal Chem 2010; 399:1999-2014. [DOI: 10.1007/s00216-010-4325-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 10/07/2010] [Accepted: 10/10/2010] [Indexed: 11/24/2022]
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El Khoury Y, Trivella A, Gross J, Hellwig P. Probing the Hydrogen Bonding Structure in the Rieske Protein. Chemphyschem 2010; 11:3313-9. [DOI: 10.1002/cphc.201000331] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cheap H, Bernad S, Derrien V, Gerencsér L, Tandori J, de Oliveira P, Hanson DK, Maróti P, Sebban P. M234Glu is a component of the proton sponge in the reaction center from photosynthetic bacteria. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1787:1505-15. [PMID: 19632193 DOI: 10.1016/j.bbabio.2009.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 07/13/2009] [Accepted: 07/15/2009] [Indexed: 10/20/2022]
Abstract
Bacterial reaction centers use light energy to couple the uptake of protons to the successive semi-reduction of two quinones, namely Q(A) and Q(B). These molecules are situated symmetrically in regard to a non-heme iron atom. Four histidines and one glutamic acid, M234Glu, constitute the five ligands of this atom. By flash-induced absorption spectroscopy and delayed fluorescence we have studied in the M234EH and M234EL variants the role played by this acidic residue on the energetic balance between the two quinones as well as in proton uptake. Delayed fluorescence from the P(+)Q(A)(-) state (P is the primary electron donor) and temperature dependence of the rate of P(+)Q(A)(-) charge recombination that are in good agreement show that in the two RC variants, both Q(A)(-) and Q(B)(-) are destabilized by about the same free energy amount: respectively approximately 100 +/- 5 meV and 90 +/- 5 meV for the M234EH and M234EL variants, as compared to the WT. Importantly, in the M234EH and M234EL variants we observe a collapse of the high pH band (present in the wild-type reaction center) of the proton uptake amplitudes associated with formation of Q(A)(-) and Q(B)(-). This band has recently been shown to be a signature of a collective behaviour of an extended, multi-entry, proton uptake network. M234Glu seems to play a central role in the proton sponge-like system formed by the RC protein.
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Affiliation(s)
- Hélène Cheap
- Laboratoire de Chimie Physique, UMR 8000, University of Paris-Sud 11/CNRS, 91405 cedex, France
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Blanchet L, Ruckebusch C, Mezzetti A, Huvenne JP, de Juan A. Monitoring and Interpretation of Photoinduced Biochemical Processes by Rapid-Scan FTIR Difference Spectroscopy and Hybrid Hard and Soft Modeling. J Phys Chem B 2009; 113:6031-40. [DOI: 10.1021/jp8056042] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lionel Blanchet
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR CNRS 8516, Université des Sciences et Technologies de Lille (USTL), bât. C5, 59655 Villeneuve d’Ascq, France; Chemometrics Group, Department of Analytical Chemistry, Universitat de Barcelona, Diagonal, 647, 08028 Barcelona, Spain; and Service de Bioénenergétique Biologie Structurale et Mécanismes (SB2SM), iBiTecS, CEA, URA CNRS 2096, F-91191 Gif-sur-Yvette, France
| | - Cyril Ruckebusch
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR CNRS 8516, Université des Sciences et Technologies de Lille (USTL), bât. C5, 59655 Villeneuve d’Ascq, France; Chemometrics Group, Department of Analytical Chemistry, Universitat de Barcelona, Diagonal, 647, 08028 Barcelona, Spain; and Service de Bioénenergétique Biologie Structurale et Mécanismes (SB2SM), iBiTecS, CEA, URA CNRS 2096, F-91191 Gif-sur-Yvette, France
| | - Alberto Mezzetti
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR CNRS 8516, Université des Sciences et Technologies de Lille (USTL), bât. C5, 59655 Villeneuve d’Ascq, France; Chemometrics Group, Department of Analytical Chemistry, Universitat de Barcelona, Diagonal, 647, 08028 Barcelona, Spain; and Service de Bioénenergétique Biologie Structurale et Mécanismes (SB2SM), iBiTecS, CEA, URA CNRS 2096, F-91191 Gif-sur-Yvette, France
| | - Jean Pierre Huvenne
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR CNRS 8516, Université des Sciences et Technologies de Lille (USTL), bât. C5, 59655 Villeneuve d’Ascq, France; Chemometrics Group, Department of Analytical Chemistry, Universitat de Barcelona, Diagonal, 647, 08028 Barcelona, Spain; and Service de Bioénenergétique Biologie Structurale et Mécanismes (SB2SM), iBiTecS, CEA, URA CNRS 2096, F-91191 Gif-sur-Yvette, France
| | - Anna de Juan
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR CNRS 8516, Université des Sciences et Technologies de Lille (USTL), bât. C5, 59655 Villeneuve d’Ascq, France; Chemometrics Group, Department of Analytical Chemistry, Universitat de Barcelona, Diagonal, 647, 08028 Barcelona, Spain; and Service de Bioénenergétique Biologie Structurale et Mécanismes (SB2SM), iBiTecS, CEA, URA CNRS 2096, F-91191 Gif-sur-Yvette, France
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Hielscher R, Wenz T, Hunte C, Hellwig P. Monitoring the redox and protonation dependent contributions of cardiolipin in electrochemically induced FTIR difference spectra of the cytochrome bc(1) complex from yeast. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1787:617-25. [PMID: 19413949 DOI: 10.1016/j.bbabio.2009.01.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 01/12/2009] [Accepted: 01/12/2009] [Indexed: 10/21/2022]
Abstract
Biochemical studies have shown that cardiolipin is essential for the integrity and activity of the cytochrome bc(1) complex and many other membrane proteins. Recently the direct involvement of a bound cardiolipin molecule (CL) for proton uptake at center N, the site of quinone reduction, was suggested on the basis of a crystallographic study. In the study presented here, we probe the low frequency infrared spectroscopy region as a technique suitable to detect the involvement of the lipids in redox induced reactions of the protein. First the individual infrared spectroscopic features of lipids, typically present in the yeast membrane, have been monitored for different pH values in micelles and vesicles. The pK(a) values for cardiolipin molecule have been observed at 4.7+/-0.3 and 7.9+/-1.3, respectively. Lipid contributions in the electrochemically induced FTIR spectra of the bc(1) complex from yeast have been identified by comparing the spectra of the as isolated form, with samples where the lipids were digested by lipase-A(2). Overall, a noteworthy perturbation in the spectral region typical for the protein backbone can be reported. Interestingly, signals at 1159, 1113, 1039 and 980 cm(-1) have shifted, indicating the perturbation of the protonation state of cardiolipin coupled to the reduction of the hemes. Additional shifts are found and are proposed to reflect lipids reorganizing due to a change in their direct environment upon the redox reaction of the hemes. In addition a small shift in the alpha band from 559 to 556 nm can be seen after lipid depletion, reflecting the interaction with heme b(H) and heme c. Thus, our work highlights the role of lipids in enzyme reactivity and structure.
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Affiliation(s)
- Ruth Hielscher
- Institut de Chimie, UMR 7177, CNRS, Université de Strasbourg, F-67070 Strasbourg, France
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Lavergne J, Verméglio A, Joliot P. Functional Coupling Between Reaction Centers and Cytochrome bc 1 Complexes. THE PURPLE PHOTOTROPHIC BACTERIA 2009. [DOI: 10.1007/978-1-4020-8815-5_26] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Wraight CA, Gunner MR. The Acceptor Quinones of Purple Photosynthetic Bacteria — Structure and Spectroscopy. THE PURPLE PHOTOTROPHIC BACTERIA 2009. [DOI: 10.1007/978-1-4020-8815-5_20] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Nabedryk E, Breton J. Coupling of electron transfer to proton uptake at the QB site of the bacterial reaction center: A perspective from FTIR difference spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2008; 1777:1229-48. [DOI: 10.1016/j.bbabio.2008.06.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Revised: 06/26/2008] [Accepted: 06/27/2008] [Indexed: 01/09/2023]
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Blanchet L, Mezzetti A, Ruckebusch C, Huvenne JP, de Juan A. Multivariate curve resolution of rapid-scan FTIR difference spectra of quinone photoreduction in bacterial photosynthetic membranes. Anal Bioanal Chem 2007; 387:1863-73. [PMID: 17203250 DOI: 10.1007/s00216-006-0981-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Revised: 10/26/2006] [Accepted: 11/02/2006] [Indexed: 10/23/2022]
Abstract
Photosynthetic reaction centres and membranes are systems of particular interest and are often taken as models to investigate the molecular mechanisms of selected bioenergetic reactions. In this work, a multivariate curve resolution by alternating least squares procedure is detailed for resolution of time-resolved difference FTIR spectra probing the evolution of quinone reduction in photosynthetic membranes from Rhodobacter sphaeroides under photoexcitation. For this purpose, different data sets were acquired in the same time range and spectroscopic domain under slightly different experimental conditions. To enable resolution and provide meaningful results the different data sets were arranged in an augmented matrix. This strategy enabled recovery of three different species despite rank-deficiency conditions. It also results in better definition (identity and evolution) of the contributions. From the resolved spectra, the species have been attributed to: 1. the formation of ubiquinol, more precisely the disappearance of Q/appearance of QH(2); 2. conformational change of the protein in the surrounding biological medium; 3. oxidation of diaminodurene, a redox mediator. Because, moreover, results obtained from augmented data sets strategies enable quantitative and qualitative interpretation of concentration profiles, other effects, for example the consequence of repeated light excitation of the same sample, choice of illumination power, or the number of spectra accumulated could be compared and discussed.
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Affiliation(s)
- L Blanchet
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR), UMR CNRS 8516, Université des Sciences et Technologies de Lille (USTL), bât C5, 59655 Villeneuve d'Ascq, France
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Mezzetti A, Leibl W. Investigation of ubiquinol formation in isolated photosynthetic reaction centers by rapid-scan Fourier transform IR spectroscopy. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2005; 34:921-36. [PMID: 15909199 DOI: 10.1007/s00249-005-0469-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2004] [Revised: 01/27/2005] [Accepted: 01/30/2005] [Indexed: 10/25/2022]
Abstract
Light-induced formation of ubiquinol-10 in Rhodobacter sphaeroides reaction centers was followed by rapid-scan Fourier transform IR difference spectroscopy, a technique that allows the course of the reaction to be monitored, providing simultaneously information on the redox states of cofactors and on protein response. The spectrum recorded between 4 and 29 ms after the second flash showed bands at 1,470 and 1,707 cm(-1), possibly due to a QH(-) intermediate state. Spectra recorded at longer delay times showed a different shape, with bands at 1,388 (+) and 1,433 (+) cm(-1) characteristic of ubiquinol. These spectra reflect the location of the ubiquinol molecule outside the Q(B) binding site. This was confirmed by Fourier transform IR difference spectra recorded during and after continuous illumination in the presence of an excess of exogenous ubiquinone molecules, which revealed the process of ubiquinol formation, of ubiquinone/ubiquinol exchange at the Q(B) site and between detergent micelles, and of Q(B)(-) and QH(2) reoxidation by external redox mediators. Kinetics analysis of the IR bands allowed us to estimate the ubiquinone/ubiquinol exchange rate between detergent micelles to approximately 1 s. The reoxidation rate of Q(B)(-) by external donors was found to be much lower than that of QH(2), most probably reflecting a stabilizing/protecting effect of the protein for the semiquinone form. A transient band at 1,707 cm(-1) observed in the first scan (4-29 ms) after both the first and the second flash possibly reflects transient protonation of the side chain of a carboxylic amino acid involved in proton transfer from the cytoplasm towards the Q(B) site.
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Affiliation(s)
- Alberto Mezzetti
- Service de Bioénergétique, CEA-Saclay, 91191, Gif-sur-Yvette, France.
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Comayras F, Jungas C, Lavergne J. Functional consequences of the organization of the photosynthetic apparatus in Rhodobacter sphaeroides. I. Quinone domains and excitation transfer in chromatophores and reaction center.antenna complexes. J Biol Chem 2005; 280:11203-13. [PMID: 15632164 DOI: 10.1074/jbc.m412088200] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The purpose of this study was to gain information on the functional consequences of the supramolecular organization of the photosynthetic apparatus in the bacterium Rhodobacter sphaeroides. Isolated complexes of the reaction center (RC) with its core antenna ring (light-harvesting complex 1 (LH1)) were studied in their dimeric (native) form or as monomers with respect to excitation transfer and distribution of the quinone pool. Similar issues were examined in chromatophore membranes. The relationship between the fluorescence yield and the amount of closed centers is indicative of a very efficient excitation transfer between the two monomers in isolated dimeric complexes. A similar dependence was observed in chromatophores, suggesting that excitation transfer in vivo from a closed RC.LH1 unit is also essentially directed to its partner in the dimer. The isolated complexes were found to retain 25-30% of the endogenous quinone acceptor pool, and the distribution of this pool among the complexes suggests a cooperative character for the association of quinones with the protein complexes. In chromatophores, the decrease in the amount of photoreducible quinones when inhibiting a fraction of the centers implies a confinement of the quinone pool over small domains, including one to six reaction centers. We suggest that the crowding of membrane proteins may not be the sole reason for quinone confinement and that a quinone-rich region is formed around the RC.LH1 complexes.
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Affiliation(s)
- Frédéric Comayras
- Unité Mixte de Recherche 6191 CNRS-Commissariat à l'Energie Atomique-Aix Marseille II, Département d'Ecophysiologie Végétale et de Microbiologie, Commissariat à l'Energie Atomique Cadarache, 13108 Saint Paul-lez-Durance Cedex, France
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Tatulian SA. Attenuated Total Reflection Fourier Transform Infrared Spectroscopy: A Method of Choice for Studying Membrane Proteins and Lipids†. Biochemistry 2003; 42:11898-907. [PMID: 14556620 DOI: 10.1021/bi034235+] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Suren A Tatulian
- Biomolecular Science Center and Department of Molecular Biology and Microbiology, University of Central Florida, Orlando, Florida 32826, USA.
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