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Sipka G, Nagy L, Magyar M, Akhtar P, Shen JR, Holzwarth AR, Lambrev PH, Garab G. Light-induced reversible reorganizations in closed Type II reaction centre complexes: physiological roles and physical mechanisms. Open Biol 2022; 12:220297. [PMID: 36514981 PMCID: PMC9748786 DOI: 10.1098/rsob.220297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/22/2022] [Indexed: 12/15/2022] Open
Abstract
The purpose of this review is to outline our understanding of the nature, mechanism and physiological significance of light-induced reversible reorganizations in closed Type II reaction centre (RC) complexes. In the so-called 'closed' state, purple bacterial RC (bRC) and photosystem II (PSII) RC complexes are incapable of generating additional stable charge separation. Yet, upon continued excitation they display well-discernible changes in their photophysical and photochemical parameters. Substantial stabilization of their charge-separated states has been thoroughly documented-uncovering light-induced reorganizations in closed RCs and revealing their physiological importance in gradually optimizing the operation of the photosynthetic machinery during the dark-to-light transition. A range of subtle light-induced conformational changes has indeed been detected experimentally in different laboratories using different bRC and PSII-containing preparations. In general, the presently available data strongly suggest similar structural dynamics of closed bRC and PSII RC complexes, and similar physical mechanisms, in which dielectric relaxation processes and structural memory effects of proteins are proposed to play important roles.
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Affiliation(s)
- G. Sipka
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári körút 62, 6726 Szeged, Hungary
| | - L. Nagy
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári körút 62, 6726 Szeged, Hungary
- Institute of Medical Physics and Informatics, University of Szeged, Rerrich B. tér 1, 6720 Szeged, Hungary
| | - M. Magyar
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári körút 62, 6726 Szeged, Hungary
| | - P. Akhtar
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári körút 62, 6726 Szeged, Hungary
| | - J.-R. Shen
- Institute of Interdisciplinary Science, and Graduate School of Natural Science and Technology, Okayama University, 700-8530 Okayama, Japan
- Institute of Botany, Chinese Academy of Sciences, 100093 Beijing, People's Republic of China
| | - A. R. Holzwarth
- Max-Planck-Institute for Chemical Energy Conversion, 45470 Mülheim a.d. Ruhr, Germany
| | - P. H. Lambrev
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári körút 62, 6726 Szeged, Hungary
| | - G. Garab
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári körút 62, 6726 Szeged, Hungary
- Department of Physics, Faculty of Science, University of Ostrava, 710 00 Ostrava, Czech Republic
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Nagy L, Kiss V, Brumfeld V, Osvay K, Börzsönyi Á, Magyar M, Szabó T, Dorogi M, Malkin S. Thermal Effects and Structural Changes of Photosynthetic Reaction Centers Characterized by Wide Frequency Band Hydrophone: Effects of Carotenoids and Terbutryn. Photochem Photobiol 2015; 91:1368-75. [PMID: 26277346 DOI: 10.1111/php.12511] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 08/06/2015] [Indexed: 11/30/2022]
Affiliation(s)
- László Nagy
- Department of Medical Physics and Informatics; University of Szeged; Szeged Hungary
| | - Vladimir Kiss
- Department of Biological Chemistry; Weizmann Institute of Science; Rehovot Israel
| | - Vlad Brumfeld
- Department of Chemical Research Support; Weizmann Institute of Science; Rehovot Israel
| | - Károly Osvay
- Department of Optics and Quantum Electronics; University of Szeged; Szeged Hungary
| | - Ádám Börzsönyi
- Department of Optics and Quantum Electronics; University of Szeged; Szeged Hungary
| | - Melinda Magyar
- Department of Medical Physics and Informatics; University of Szeged; Szeged Hungary
| | - Tibor Szabó
- Department of Medical Physics and Informatics; University of Szeged; Szeged Hungary
| | - Márta Dorogi
- Biophotonics R&D Ltd; Szeged Hungary
- Institute of Plant Biology; Biological Research Center; Hungarian Academy of Sciences; Szeged Hungary
| | - Shmuel Malkin
- Department of Biological Chemistry; Weizmann Institute of Science; Rehovot Israel
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Szabó T, Bencsik G, Magyar M, Visy C, Gingl Z, Nagy K, Váró G, Hajdu K, Kozák G, Nagy L. Photosynthetic reaction centers/ITO hybrid nanostructure. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 33:769-73. [PMID: 25427486 DOI: 10.1016/j.msec.2012.10.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 10/03/2012] [Accepted: 10/31/2012] [Indexed: 11/17/2022]
Abstract
Photosynthetic reaction center proteins purified from Rhodobacter sphaeroides purple bacterium were deposited on the surface of indium tin oxide (ITO), a transparent conductive oxide, and the photochemical/-physical properties of the composite were investigated. The kinetics of the light induced absorption change indicated that the RC was active in the composite and there was an interaction between the protein cofactors and the ITO. The electrochromic response of the bacteriopheophytine absorption at 771 nm showed an increased electric field perturbation around this chromophore on the surface of ITO compared to the one measured in solution. This absorption change is associated with the charge-compensating relaxation events inside the protein. Similar life time, but smaller magnitude of this absorption change was measured on the surface of borosilicate glass. The light induced change in the conductivity of the composite as a function of the concentration showed the typical sigmoid saturation characteristics unlike if the photochemically inactive chlorophyll was layered on the ITO. In this later case the light induced change in the conductivity was oppositely proportional to the chlorophyll concentration due to the thermal dissipation of the excitation energy. The sensitivity of the measurement is very high; few picomole RC can change the light induced resistance of the composite.
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Affiliation(s)
- Tibor Szabó
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - Gábor Bencsik
- Department of Physical Chemistry and Materials Science, University of Szeged, Szeged, Hungary
| | - Melinda Magyar
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - Csaba Visy
- Department of Physical Chemistry and Materials Science, University of Szeged, Szeged, Hungary
| | - Zoltán Gingl
- Department of Technical Informatics, University of Szeged, Szeged, Hungary
| | - Krisztina Nagy
- Institute of Biophysics, Hungarian Academy of Sciences, Biological Research Center, Szeged, Hungary
| | - György Váró
- Institute of Biophysics, Hungarian Academy of Sciences, Biological Research Center, Szeged, Hungary
| | - Kata Hajdu
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - Gábor Kozák
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
| | - László Nagy
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary.
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Hou HJM, Shen G, Boichenko VA, Golbeck JH, Mauzerall D. Thermodynamics of Charge Separation of Photosystem I in the menA and menB Null Mutants of Synechocystis sp. PCC 6803 Determined by Pulsed Photoacoustics. Biochemistry 2009; 48:1829-37. [DOI: 10.1021/bi801951t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Harvey J. M. Hou
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, Department of Biochemistry and Molecular Biology and Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino 142290, Russia, and The Rockefeller University, 1230 York Avenue, New York, New York 10065
| | - Gaozhong Shen
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, Department of Biochemistry and Molecular Biology and Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino 142290, Russia, and The Rockefeller University, 1230 York Avenue, New York, New York 10065
| | - Vladimir A. Boichenko
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, Department of Biochemistry and Molecular Biology and Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino 142290, Russia, and The Rockefeller University, 1230 York Avenue, New York, New York 10065
| | - John H. Golbeck
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, Department of Biochemistry and Molecular Biology and Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino 142290, Russia, and The Rockefeller University, 1230 York Avenue, New York, New York 10065
| | - David Mauzerall
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, Department of Biochemistry and Molecular Biology and Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino 142290, Russia, and The Rockefeller University, 1230 York Avenue, New York, New York 10065
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Charge stabilization in reaction center protein investigated by optical heterodyne detected transient grating spectroscopy. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2008; 37:1167-74. [DOI: 10.1007/s00249-008-0294-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2007] [Revised: 02/14/2008] [Accepted: 02/26/2008] [Indexed: 10/22/2022]
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Tokaji Z, Tandori J, Maróti P. Light- and Redox-dependent Thermal Stability of the Reaction Center of the Photosynthetic Bacterium Rhodobacter sphaeroides¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2002)0750605lardts2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Milano F, Dorogi M, Szebényi K, Nagy L, Maróti P, Váró G, Giotta L, Agostiano A, Trotta M. Enthalpy/entropy driven activation of the first interquinone electron transfer in bacterial photosynthetic reaction centers embedded in vesicles of physiologically important phospholipids. Bioelectrochemistry 2007; 70:18-22. [PMID: 16713374 DOI: 10.1016/j.bioelechem.2006.03.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Indexed: 10/24/2022]
Abstract
The thermodynamics and kinetics of light-induced electron transfer in bacterial photosynthetic RCs are sensitive to physiologically important lipids (phosphatidylcholine, cardiolipin and phosphatidylglycerol) in the environment. The analysis of the temperature-dependence of the rate of the P(+)Q(A)(-)Q(B)-->P(+)Q(A)Q(B)(-) interquinone electron transfer revealed high enthalpy change of activation in zwitterionic or neutral micelles and vesicles and low enthalpy change of activation in vesicles constituted of negatively charged phospholipids. The entropy change of activation was compensated by the changes of enthalpy, thus the free energy change of activation ( approximately 500 meV) did not show large variation in vesicles of different lipids.
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Affiliation(s)
- Francesco Milano
- CNR, Istituto per i Processi Chimico-Fisici, Sezione di Bari, c/o Dipartimento di Chimica, Via Orabona, 4 I-70124 Bari, Italy
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Hou HJ, Mauzerall D. The A-Fx to F(A/B) step in synechocystis 6803 photosystem I is entropy driven. J Am Chem Soc 2006; 128:1580-6. [PMID: 16448129 PMCID: PMC2597517 DOI: 10.1021/ja054870y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We have previously reported the enthalpy and volume changes of charge separation in photosystem I from Synechocystis 6803 using pulsed photoacoustics on the microsecond time scale, assigned to the electron-transfer reaction from excited-state P(700) to F(A/B) iron sulfur clusters. In the present work, we focus on the thermodynamics of two steps in photosystem I: (1) P(700) --> A(1)(-)F(X) (<10 ns) and (2) A(1)(-)F(X) --> F(A/B)(-) (20-200 ns). The fit by convolution of photoacoustic waves on the nanosecond and microsecond time scales resolved two kinetic components: (1) a prompt component (<10 ns) with large negative enthalpy (-0.8 +/- 0.1 eV) and large volume change (-23 +/- 2 A(3)), which are assigned to the P(700) --> A(1)(-)F(X) step, and (2) a component with approximately 200 ns lifetime, which has a positive enthalpy (+0.4 +/- 0.2 eV) and a small volume change (-3 +/- 2 A(3)) that are attributed to the A(1)(-)F(X) --> F(A/B)(-) step. For the fast reaction using the redox potentials of A(1)F(X) (-0.67 V) and P(700) (+0.45 V) and the energy of P(700) (1.77 eV), the free energy change for the P(700) --> A(1)(-)F(X) step is -0.63 eV, and thus the entropy change (TDeltaS, T = 25 degrees C) is -0.2 +/- 0.3 eV. For the slow reaction, A(1)(-)F(X) --> F(A/B)(-), taking the free energy of -0.14 eV [Santabara, S.; Heathcote, P; Evans, C. W. Biochim. Biophys. Acta 2005, 1708, 283-310], the entropy change (TDeltaS) is positive, +0.54 +/- 0.3 eV. The positive entropy contribution is larger than the positive enthalpy, which indicates that the A(-)F(X) to F(A/B)(-) step in photosystem I is entropy driven. Other possible contributions to the measured values are discussed.
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Affiliation(s)
- Harvey J.M. Hou
- Department of Chemistry, Gonzaga University, 502 E. Boone Avenue, Spokane, Washington 99258
| | - David Mauzerall
- The Rockefeller University, 1230 York Avenue, New York, New York 10021; Tel.: (212) 327-8218; Fax: (212) 327-8853;
- To whom correspondence should be addressed
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Nagy L, Milano F, Dorogi M, Agostiano A, Laczkó G, Szebényi K, Váró G, Trotta M, Maróti P. Protein/Lipid Interaction in the Bacterial Photosynthetic Reaction Center: Phosphatidylcholine and Phosphatidylglycerol Modify the Free Energy Levels of the Quinones. Biochemistry 2004; 43:12913-23. [PMID: 15461464 DOI: 10.1021/bi0489356] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The role of characteristic phospholipids of native membranes, phosphatidylcholine (PC), phosphatidylglycerol (PG), and cardiolipin (CL), was studied in the energetics of the acceptor quinone side in photosynthetic reaction centers of Rhodobacter sphaeroides. The rates of the first, k(AB)(1), and the second, k(AB)(2), electron transfer and that of the charge recombination, k(BP), the free energy levels of Q(A)(-)Q(B) and Q(A)Q(B)(-) states, and the changes of charge compensating protein relaxation were determined in RCs incorporated into artificial lipid bilayer membranes. In RCs embedded in the PC vesicle, k(AB)(1) and k(AB)(2) increased (from 3100 to 4100 s(-1) and from 740 to 3300 s(-1), respectively) and k(BP) decreased (from 0.77 to 0.39 s(-1)) compared to those measured in detergent at pH 7. In PG, k(AB)(1) and k(BP) decreased (to values of 710 and 0.26 s(-1), respectively), while k(AB)(2) increased to 1506 s(-1) at pH 7. The free energy between the Q(A)(-)Q(B) and Q(A)Q(B)(-) states decreased in PC and PG (DeltaG degrees (Q)A-(Q)B(-->)(Q)A(Q)B- = -76.9 and -88.5 meV, respectively) compared to that measured in detergent (-61.8 meV). The changes of the Q(A)/Q(A)(-) redox potential measured by delayed luminescence showed (1) a differential effect of lipids whether RC incorporated in micelles or vesicles, (2) an altered binding interaction between anionic lipids and RC, (3) a direct influence of PC and PG on the free energy levels of the primary and secondary quinones probably through the intraprotein hydrogen-bonding network, and (4) a larger increase of the Q(A)/Q(A)(-) free energy in PG than in PC both in detergent micelles and in single-component vesicles. On the basis of recent structural data, implications of the binding properties of phospholipids to RC and possible interactions between lipids and electron transfer components will be discussed.
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Affiliation(s)
- László Nagy
- Department of Biophysics, University of Szeged, Szeged, Hungary
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Gensch T, Viappiani C. Time-resolved photothermal methods: accessing time-resolved thermodynamics of photoinduced processes in chemistry and biology. Photochem Photobiol Sci 2003; 2:699-721. [PMID: 12911218 DOI: 10.1039/b303177b] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photothermal methods are currently being employed in a variety of research areas, ranging from materials science to environmental monitoring. Despite the common term which they are collected under, the implementations of these techniques are as diverse as the fields of application. In this review, we concentrate on the recent applications of time-resolved methods in photochemistry and photobiology.
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Affiliation(s)
- Thomas Gensch
- Forschungszentrum Jülich, Institut für Biologische Informationsverarbeitung 1, 52425 Jülich, Germany.
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Tokaji Z, Tandori J, Maróti P. Light- and redox-dependent thermal stability of the reaction center of the photosynthetic Bacterium rhodobacter sphaeroides. Photochem Photobiol 2002; 75:605-12. [PMID: 12081322 DOI: 10.1562/0031-8655(2002)075<0605:lardts>2.0.co;2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Irreversible loss of the photochemical activity and damage of the pigments (bacteriochlorophyll [Bchl] monomer, Bchl dimer [P] and bacteriopheophytin) by combined treatment with intense and continuous visible light and elevated temperature have been studied in a deoxygenated solution of reaction center (RC) protein from the nonsulfur purple photosynthetic bacterium Rhodobacter sphaeroides. Both the fraction of RC in the charge-separated redox state (P+Q-, where Q is a quinone electron acceptor) and the degradation of the pigments showed saturation as a function of increasing light intensity up to 400 mW cm(-2) (488/515 nm) or 1100 microE m(-2) s(-1) (white light). The thermal denaturation curves of the RC in the P+Q- redox state demonstrated broadening and 10-20 degrees C shift to lower temperature (after 30-90 min heat treatment) compared with those in the PQ redox state. Similar but less striking behavior was seen for RC of other redox states (P+Q and PQ-) generated either by light or by electrochemical treatment in the dark. These experiments suggest that it is not the intense light per se but the changes in the redox state of the protein that are responsible for the increased sensitivity to photo- and heat damage. The RC with a charge pair (P+Q-) is more vulnerable to elevated temperature than the RC with (P+Q or PQ-) or without (PQ) a single charge. To reveal both the thermodynamic and kinetic aspects of the denaturation, a simple three-state model of coupled reversible thermal and irreversible kinetic transitions is presented. These effects may have relevance to the heat stability of other redox proteins in bioenergetics.
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Affiliation(s)
- Zsolt Tokaji
- Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, Szeged
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