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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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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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Mathis P, Nabedryk E, Verméglio A. Tribute in memory of Jacques Breton (1942-2018). PHOTOSYNTHESIS RESEARCH 2019; 140:263-274. [PMID: 30712213 DOI: 10.1007/s11120-019-00618-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
Jacques Breton spent his 39 years of professional life at Saclay, a center of the French Atomic Energy Commission. He studied photosynthesis with various advanced biophysical tools, often developed by himself and his numerous coworkers, obtaining a large number of new information on the structure and the functioning of antenna and of reaction centers of plants and bacteria: excitation migration in the antenna, orientation of molecules, rate of primary reactions, binding of pigments and electron transfer cofactors. Although it is much too short to illustrate his impressive work, we hope that this contribution will help maintaining the souvenir of Jacques Breton as an active and enthusiastic person, full of qualities, devoted to research and to his family as well. We include personal comments from N. E. Geacintov, A. Dobek, W. Leibl, M. Vos and W. W. Parson.
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Affiliation(s)
- Paul Mathis
- Section de Bioénergétique, CEA Saclay, 91191, Gif-sur-Yvette, France.
| | - Eliane Nabedryk
- Service de Bioénergétique Biologie Structurale et Mécanismes, CEA Saclay, 91191, Gif-sur-Yvette, France
| | - André Verméglio
- Laboratoire de Bioénergétique Cellulaire, CEA Cadarache, 13108, Saint-Paul-lez-Durance, France
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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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Effects of dehydration on light-induced conformational changes in bacterial photosynthetic reaction centers probed by optical and differential FTIR spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1827:328-39. [PMID: 23103449 DOI: 10.1016/j.bbabio.2012.10.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 10/16/2012] [Accepted: 10/19/2012] [Indexed: 11/22/2022]
Abstract
Following light-induced electron transfer between the primary donor (P) and quinone acceptor (Q(A)) the bacterial photosynthetic reaction center (RC) undergoes conformational relaxations which stabilize the primary charge separated state P(+)Q(A)(-). Dehydration of RCs from Rhodobacter sphaeroides hinders these conformational dynamics, leading to acceleration of P(+)Q(A)(-) recombination kinetics [Malferrari et al., J. Phys. Chem. B 115 (2011) 14732-14750]. To clarify the structural basis of the conformational relaxations and the involvement of bound water molecules, we analyzed light-induced P(+)Q(A)(-)/PQ(A) difference FTIR spectra of RC films at two hydration levels (relative humidity r=76% and r=11%). Dehydration reduced the amplitude of bands in the 3700-3550cm(-1) region, attributed to water molecules hydrogen bonded to the RC, previously proposed to stabilize the charge separation by dielectric screening [Iwata et al., Biochemistry 48 (2009) 1220-1229]. Other features of the FTIR difference spectrum were affected by partial depletion of the hydration shell (r=11%), including contributions from modes of P (9-keto groups), and from NH or OH stretching modes of amino acidic residues, absorbing in the 3550-3150cm(-1) range, a region so far not examined in detail for bacterial RCs. To probe in parallel the effects of dehydration on the RC conformational relaxations, we analyzed by optical absorption spectroscopy the kinetics of P(+)Q(A)(-) recombination following the same photoexcitation used in FTIR measurements (20s continuous illumination). The results suggest a correlation between the observed FTIR spectral changes and the conformational rearrangements which, in the hydrated system, strongly stabilize the P(+)Q(A)(-) charge separated state over the second time scale.
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Stahl AD, Crouch LI, Jones MR, van Stokkum I, van Grondelle R, Groot ML. Role of PufX in Photochemical Charge Separation in the RC-LH1 Complex from Rhodobacter sphaeroides: An Ultrafast Mid-IR Pump–Probe Investigation. J Phys Chem B 2011; 116:434-44. [DOI: 10.1021/jp206697k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Andreas D. Stahl
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands
| | - Lucy I. Crouch
- School of Biochemistry, Medical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom
| | - Michael R. Jones
- School of Biochemistry, Medical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, United Kingdom
| | - Ivo van Stokkum
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands
| | - Marie Louise Groot
- Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands
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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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Berthomieu C, Hienerwadel R. Fourier transform infrared (FTIR) spectroscopy. PHOTOSYNTHESIS RESEARCH 2009; 101:157-170. [PMID: 19513810 DOI: 10.1007/s11120-009-9439-x] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Accepted: 05/15/2009] [Indexed: 05/26/2023]
Abstract
Fourier transform infrared (FTIR) spectroscopy probes the vibrational properties of amino acids and cofactors, which are sensitive to minute structural changes. The lack of specificity of this technique, on the one hand, permits us to probe directly the vibrational properties of almost all the cofactors, amino acid side chains, and of water molecules. On the other hand, we can use reaction-induced FTIR difference spectroscopy to select vibrations corresponding to single chemical groups involved in a specific reaction. Various strategies are used to identify the IR signatures of each residue of interest in the resulting reaction-induced FTIR difference spectra. (Specific) Isotope labeling, site-directed mutagenesis, hydrogen/deuterium exchange are often used to identify the chemical groups. Studies on model compounds and the increasing use of theoretical chemistry for normal modes calculations allow us to interpret the IR frequencies in terms of specific structural characteristics of the chemical group or molecule of interest. This review presents basics of FTIR spectroscopy technique and provides specific important structural and functional information obtained from the analysis of the data from the photosystems, using this method.
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Affiliation(s)
- Catherine Berthomieu
- Commissariat à l' Energie Atomique, Laboratoire des Interactions Protéine Métal, DSV/Institut de Biologie Environnementale et Biotechnologie, CNRS-CEA-Université Aix-Marseille II, Saint Paul-lez-Durance 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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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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Breton J. Steady-state FTIR spectra of the photoreduction of QA and QB in Rhodobacter sphaeroides reaction centers provide evidence against the presence of a proposed transient electron acceptor X between the two quinones. Biochemistry 2007; 46:4459-65. [PMID: 17381130 DOI: 10.1021/bi700297b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the reaction center (RC) of the photosynthetic bacterium Rhodobacter sphaeroides, two ubiquinone molecules, QA and QB, play a pivotal role in the conversion of light energy into chemical free energy by coupling electron transfer to proton uptake. In native RCs, the transfer of an electron from QA to QB takes place in the time range of 5-200 micros. On the basis of time-resolved FTIR step-scan measurements in native RCs, a new and unconventional mechanism has been proposed in which QB- formation precedes QA- oxidation [Remy, A., and Gerwert, K. (2003) Nat. Struct. Biol. 10, 637-644]. The IR signature of the proposed transient intermediary electron acceptor (denoted X) operating between QA and QB has been recently measured by the rapid-scan technique in the DN(L210) mutant RCs, in which the QA to QB electron transfer is slowed 8-fold compared to that in native RCs. This IR signature has been reported as a difference spectrum involving states X+, X, QA, and QA- [Hermes, S., et al. (2006) Biochemistry 45, 13741-13749]. Here, we report the steady-state FTIR difference spectra of the photoreduction of either QA or QB measured in both native and DN(L210) mutant RCs in the presence of potassium ferrocyanide. In these spectra, the CN stretching marker modes of ferrocyanide and ferricyanide allow the extent of the redox reactions to be quantitatively compared and are used for a precise normalization of the QA-/QA and QB-/QB difference spectra. The calculated QA- QB/QA QB- double-difference spectrum in DN(L210) mutant RCs is closely equivalent to the reported QA- X+/QA X spectrum in the rapid-scan measurement. We therefore conclude that species X+ and X are spectrally indistinguishable from QB and QB-, respectively. Further comparison of the QA- QB/QA QB- double-difference spectra in native and DN(L210) RCs also allows the possibility that QB- formation precedes QA- reoxidation to be ruled out for native RCs.
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Affiliation(s)
- Jacques Breton
- Service de Bioénergétique, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France.
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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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Mohapatra H, Umapathy S. Time-Resolved Resonance Raman Spectroscopic Studies on the Radical Anions of Methyl-1,4-benzoquinone and 2,6-Dimethyl-1,4-benzoquinone. J Phys Chem A 2002. [DOI: 10.1021/jp013750j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Himansu Mohapatra
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Siva Umapathy
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
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Zhang H, Razeghifard MR, Fischer G, Wydrzynski T. A time-resolved FTIR difference study of the plastoquinone QA and redox-active tyrosine YZ interactions in photosystem II. Biochemistry 1997; 36:11762-8. [PMID: 9305966 DOI: 10.1021/bi970815t] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this paper, we present the first time-dependent measurements of flash-induced infrared difference spectra of photosystem II (PSII) using Fourier transform infrared (FTIR) spectroscopy. With this experimental approach, we were able to obtain the YZoxQA-/YZQA vibrational difference spectrum of Tris-washed, PSII-enriched samples in the absence of hydroxylamine at room temperature (16 +/- 2 degrees C), with a spectral resolution of 4 cm-1 and a temporal resolution of 50 ms. In order to determine the dominant species in the FTIR spectrum at a particular point in time after an excitation flash, the decay kinetics of YZox and QA- were independently monitored by EPR and chlorophyll a fluorescence, respectively, under the same experimental conditions. These measurements confirmed that the addition of DCMU to Tris-washed PSII samples does not significantly affect the YZox decay, but does substantially slow down the QA- decay. By making use of the difference in the decay kinetics using DCMU, the QA-/QA signals could be separated from the YZox/YZ signals and a pure QA-/QA difference spectrum obtained. By comparison of the YZoxQA-/YZQA difference spectrum with the pure QA-/QA difference spectrum, a large differential band at 1706/1699 cm-1 could be identified and associated with YZ oxidation. In contrast, an intense band at 1478 cm-1, whose DCMU-sensitive decay follows the QA- decay based on the chlorophyll a fluorescence measurements, was present in all of the time-resolved spectra. Since no significant reversible Chl+ radicals could be detected by the EPR measurements under our experimental conditions, we confirm that this band most likely arises only from the semiquinone anion QA- [Berthomieu, C., Nabedryk, E., Mäntele, W., & Breton, J. (1990) FEBS Lett. 269, 363-367].
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Affiliation(s)
- H Zhang
- Research School of Biological Sciences, Institute of Advanced Studies, The Australian National University, Canberra, Australia 0200
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Breton J, Nabedryk E. Protein-quinone interactions in the bacterial photosynthetic reaction center: light-induced FTIR difference spectroscopy of the quinone vibrations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1996. [DOI: 10.1016/0005-2728(96)00054-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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17
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Kropacheva TN, van Liemt WBS, Raap J, Lugtenburg J, Hoff AJ. Hydrogen-Bonding Effect on 13C and Proton Hyperfine Couplings of [4-13C]-Labeled Ubisemiquinones in Vitro. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960059l] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tatyana N. Kropacheva
- Department of Chemistry, Udmurt State University, Izhevsk, 426037 Russia, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, and Department of Biophysics, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Willem B. S. van Liemt
- Department of Chemistry, Udmurt State University, Izhevsk, 426037 Russia, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, and Department of Biophysics, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Jan Raap
- Department of Chemistry, Udmurt State University, Izhevsk, 426037 Russia, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, and Department of Biophysics, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Johan Lugtenburg
- Department of Chemistry, Udmurt State University, Izhevsk, 426037 Russia, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, and Department of Biophysics, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Arnold J. Hoff
- Department of Chemistry, Udmurt State University, Izhevsk, 426037 Russia, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, and Department of Biophysics, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
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Nonella M. Structures and harmonic force fields of 1,4-naphthoquinone and naphthalene: A density functional study. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0166-1280(95)04390-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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MacDonald GM, Steenhuis JJ, Barry BA. A difference Fourier transform infrared spectroscopic study of chlorophyll oxidation in hydroxylamine-treated photosystem II. J Biol Chem 1995; 270:8420-8. [PMID: 7721736 DOI: 10.1074/jbc.270.15.8420] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
In oxygenic photosynthesis, photosystem II is the chlorophyll-containing reaction center that carries out the light-induced transfer of electrons from water to plastoquinone. Fourier transform infrared spectroscopy can be used to obtain information about the structural changes that accompany electron transfer in photosystem II. The vibrational difference spectrum associated with the reduction of photosystem II acceptor quinones is of interest. Previously, a high concentration of the photosystem II donor, hydroxylamine, has been used to obtain a spectrum attributed to QA- -QA (Berthomieu, C., Nabedryk, E., Mantele, W. and Breton, J. FEBS Lett. (1990) 269, 363). Here, we use electron paramagnetic resonance, Fourier transform infrared spectroscopy, and 15N isotopic labeling to show that the difference infrared spectrum, obtained under these conditions, also exhibits a contribution from the oxidation of chlorophyll.
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Affiliation(s)
- G M MacDonald
- Department of Biochemistry, University of Minnesota, St. Paul 55108, USA
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Affiliation(s)
- F Siebert
- Institute of Biophysics and Radiation Biology, University of Freiburg, Germany
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Breton J, Boullais C, Burie JR, Nabedryk E, Mioskowski C. Binding sites of quinones in photosynthetic bacterial reaction centers investigated by light-induced FTIR difference spectroscopy: assignment of the interactions of each carbonyl of QA in Rhodobacter sphaeroides using site-specific 13C-labeled ubiquinone. Biochemistry 1994; 33:14378-86. [PMID: 7981197 DOI: 10.1021/bi00252a002] [Citation(s) in RCA: 104] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Light-induced QA-/QA FTIR difference spectra of the photoreduction of the primary quinone (QA) have been obtained for Rhodobacter sphaeroides reaction centers (RCs) reconstituted with ubiquinone (Q3) labeled selectively with 13C at the 1- or 4-position of the quinone ring, i.e., on either of the two carbonyls. The vibrational modes of the quinone in the QA site are compared to those in vitro. IR absorption spectra of films of the labeled quinones show that the two carbonyls contribute equally to the split C = O band at 1663-1650 cm-1. This splitting is assigned to the two different geometries of the methoxy group nearest to each carbonyl. The QA-/QA spectra of RCs reconstituted with either 13C1- or 13C4-labeled Q3 and with unlabeled Q3 as well as the double differences calculated from these spectra exhibit distinct isotopic shifts for the bands assigned to C = O and C = C vibrations of the neutral QA. For the unlabeled QA, these bands correspond to the bands at 1660, 1628, and 1601 cm-1 previously detected upon nonselective isotopic labeling [Breton, J., Burie, J.-R., Berthomieu, C., Berger, G., & Nabedryk, E. (1994) Biochemistry 33, 4953-4965]. The 1660-cm-1 band is unaffected upon selective labeling at C4 but shifts to approximately 1623 cm-1 upon 13C1 labeling, demonstrating that this band arises from the C1 carbonyl, proximal to the isoprenoid chain. The band at 1628 cm-1 shifts by 11 and 16 cm-1 upon 13C1 and 13C4 labeling, respectively, and is assigned to a C = C mode coupled to both carbonyls.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J Breton
- Section de Bioénergétique, CEA-Saclay, Gif-sur-Yvette, France
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Binding and interaction of the primary and the secondary electron acceptor quinones in bacterial photosynthesis. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1993. [DOI: 10.1016/0005-2728(93)90005-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Temperature dependence of the light-induced infrared difference spectra of chromatophores and reaction centers from photosynthetic bacteria. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1993. [DOI: 10.1016/0005-2728(93)90096-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fourier transform infrared studies on charge-transfer interactions of plastoquinones and α-tocopherol quinone with their hydroquinone forms and monog. Biophys Chem 1993. [DOI: 10.1016/0301-4622(93)80005-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kruk J, Strzałka K, Leblanc RM. Fourier transform infrared studies on charge-transfer interactions of plastoquinones and α-tocopherol quinone with their hydroquinone forms and monog. Biophys Chem 1992. [DOI: 10.1016/0301-4622(92)87008-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nabedryk E, Robles SJ, Goldman E, Youvan DC, Breton J. Probing the primary donor environment in the histidineM200-->leucine and histidineL173-->leucine heterodimer mutants of Rhodobacter capsulatus by light-induced Fourier transform infrared difference spectroscopy. Biochemistry 1992; 31:10852-8. [PMID: 1420198 DOI: 10.1021/bi00159a028] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Light-induced P+QB-/PQB FTIR difference spectra of reaction centers (RCs) have been obtained from chromatophores lacking light-harvesting B800-850 antenna for Rhodobacter capsulatus wild type (WT) and for the two mutants HisM200-->Leu and HisL173-->Leu. The primary donor (P) in both mutants consists of a bacteriochlorophyll-bacteriopheophytin heterodimer. The most prominent difference between the WT and the mutant spectra is in the 1600-1200-cm-1 region. The WT spectrum displays large positive bands at approximately 1290, 1500-1430, and 1580-1530 cm-1. These three bands are either small or altogether absent in the heterodimer spectra. In addition, both heterodimer spectra compare well with the electrochemically generated BChla+/BChla spectrum [Mäntele, W.G., Wollenweber, A. M., Nabedryk, E., & Breton, J. (1988) Proc. Natl. Acad. Sci. U.S.A. 85, 8468-8472]. These observations indicate that the positive charge is localized on the monomeric BChl in the heterodimers. The overall shape of the ester and keto C = O signals in the BChla+/BChla spectrum is maintained in the in situ spectra although significant differences are observed in the frequency, width, and splitting of the bands. The shape of the signal at 1757/1744 cm-1 in HisL173-->Leu is comparable to the 1751/1737-cm-1 signal of BChla+/BChla in tetrahydrofuran, indicating a free 10a ester C = O of PM in HisL173-->Leu. The reduced amplitude of the negative 1740-cm-1 feature in both HisM200-->Leu and WT spectra suggests a hydrogen-bonded 10a ester C = O for PL.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- E Nabedryk
- Département de Biologie Cellulaire et Moléculaire, Centre d'Etudes Nucléaires de Saclay, Gif-sur-Yvette, France
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Hienerwadel R, Thibodeau D, Lenz F, Nabedryk E, Breton J, Kreutz W, Mäntele W. Time-resolved infrared spectroscopy of electron transfer in bacterial photosynthetic reaction centers: dynamics of binding and interaction upon QA and QB reduction. Biochemistry 1992; 31:5799-808. [PMID: 1610825 DOI: 10.1021/bi00140a016] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Light-induced forward electron transfer in the bacterial photosynthetic reaction center from Rhodobacter sphaeroides was investigated by time-resolved infrared spectroscopy. Using a highly sensitive kinetic photometer based on a tunable IR diode laser source [Mäntele, W., Hienerwadel, R., Lenz, F., Riedel, W. J., Grisar, R., & Tacke, M. (1990a) Spectrosc. Int. 2, 29-35], molecular processes concomitant with electron-transfer reactions were studied in the microsecond-to-second time scale. Infrared (IR) signals in the 1780-1430-cm-1 spectral region, appearing within the instrument time resolution of about 0.5 microseconds, could be assigned to molecular changes of the primary electron donor upon formation of a radical cation and to modes of the primary quinone electron acceptor QA and its environment upon formation of QA-. These IR signals are consistent with steady-state FTIR difference spectra of the P+Q- formation [Mäntele, W., Nabedryk, E., Tavitian, B. A., Kreutz, W., & Breton, J. (1985) FEBS Lett. 187, 227-232; Mäntele, W., Wollenweber, A., Nabedryk, E., & Breton, J. (1988) Proc. Natl. Acad. Sci. U.S.A. 85, 8468-8472; Nabedryk, E., Bagley, K. A., Thibodeau, D. L., Bauscher, M., Mäntele, W., & Breton, J. (1990) FEBS Lett. 266, 59-62] and with time-resolved FTIR studies [Thibodeau, D. L., Nabedryk, E., Hienerwadel, R., Lenz, F., Mäntele, W., & Breton, J. (1990) Biochim. Biophys. Acta 1020, 253-259]. At given wavenumbers, kinetic components with a half-time of approximately 120 microseconds were observed and attributed to QA----QB electron transfer. The time-resolved IR signals, in contrast to steady-state experiments where full protein relaxation after electron transfer can occur, allow us to follow directly the modes of QA and QB and their protein environment under conditions of forward electron transfer. Apart from signals attributed to the primary electron donor, signals are proposed to arise not only from the C = O and C = C vibrational modes of the neutral quinones and from the C-O and C-C vibrations of their semiquinone anion form but also from amino acid groups forming their binding sites. Some of the signals appearing with the instrument rise time as well as the transient 120-microseconds signals are interpreted in terms of binding and interaction of the primary and secondary quinone electron acceptor in the Rb. sphaeroides reaction center and of the conformational changes in their binding site.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- R Hienerwadel
- Institut für Biophysik und Strahlenbiologie, Universität Freiburg, FRG
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Breton J, Berthomieu C, Thibodeau DL, Nabedryk E. Probing the secondary quinone (QB) environment in photosynthetic bacterial reaction centers by light-induced FTIR difference spectroscopy. FEBS Lett 1991; 288:109-13. [PMID: 1879543 DOI: 10.1016/0014-5793(91)81014-y] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The photoreduction of the secondary electron acceptor, QB, has been characterized by light-induced Fourier transform infrared difference spectroscopy of Rb. sphaeroides and Rp. viridis reaction centers. The reaction centers were supplemented with ubiquinone (UQ10 or UQ0). The QB- state was generated either by continuous illumination at very low intensity or by single flash in the presence of redox compounds which rapidly reduce the photooxidized primary electron donor P+. This approach yields spectra free from P and P+ contributions making possible the study of the microenvironment of QB and QB-. Assignments are proposed for the C...O vibration of QB- and tentatively for the C = O and C = C vibrations of QB.
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Affiliation(s)
- J Breton
- DBCM/SBE, C.E.N. Saclay, Gif-sur-Yvette, France
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31
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Breton J, Thibodeau DL, Berthomieu C, Mäntele W, Verméglio A, Nabedryk E. Probing the primary quinone environment in photosynthetic bacterial reaction centers by light-induced FTIR difference spectroscopy. FEBS Lett 1991; 278:257-60. [PMID: 1899390 DOI: 10.1016/0014-5793(91)80129-q] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The photoreduction of the primary electron acceptor, QA, has been characterized by light-induced Fourier transform infrared difference spectroscopy for Rb. sphaeroides reaction centers and for Rsp. rubrum and Rp. viridis chromatophores. The samples were treated both with redox compounds, which rapidly reduce the photooxidized primary electron P+, and with inhibitors of electron transfer from QA- to the secondary quinone QB. This approach yields spectra free from P and P+ contributions which makes possible the study of the microenvironment of QA and QA-.
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Affiliation(s)
- J Breton
- DBCM, CEN, Saclay, Gif-sur-Yvette, France
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