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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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [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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Nagy L, Magyar M, Szabó T, Hajdu K, Giotta L, Dorogi M, Milano F. Photosynthetic machineries in nano-systems. Curr Protein Pept Sci 2015; 15:363-73. [PMID: 24678673 PMCID: PMC4030625 DOI: 10.2174/1389203715666140327102757] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 11/22/2013] [Accepted: 03/16/2014] [Indexed: 11/25/2022]
Abstract
Photosynthetic reaction centres are membrane-spanning proteins, found in several classes of autotroph organisms,
where a photoinduced charge separation and stabilization takes place with a quantum efficiency close to unity. The
protein remains stable and fully functional also when extracted and purified in detergents thereby biotechnological applications
are possible, for example, assembling it in nano-structures or in optoelectronic systems. Several types of bionanocomposite
materials have been assembled by using reaction centres and different carrier matrices for different purposes
in the field of light energy conversion (e.g., photovoltaics) or biosensing (e.g., for specific detection of pesticides).
In this review we will summarize the current status of knowledge, the kinds of applications available and the difficulties to
be overcome in the different applications. We will also show possible research directions for the close future in this specific
field.
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Affiliation(s)
| | | | | | | | | | | | - Francesco Milano
- Institute of Medical Physics and Informatics, University of Szeged, Rerrich B. ter 1, 6720 Szeged, Hungary.
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Hajdu K, Gergely C, Martin M, Cloitre T, Zimányi L, Tenger K, Khoroshyy P, Palestino G, Agarwal V, Hernádi K, Németh Z, Nagy L. Porous silicon/photosynthetic reaction center hybrid nanostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:11866-11873. [PMID: 22809391 DOI: 10.1021/la301888p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The purified photosynthetic reaction center protein (RC) from Rhodobacter sphaeroides R-26 purple bacteria was bound to porous silicon microcavities (PSiMc) either through silane-glutaraldehyde (GTA) chemistry or via a noncovalent peptide cross-linker. The characteristic resonance mode in the microcavity reflectivity spectrum red shifted by several nanometers upon RC binding, indicating the protein infiltration into the porous silicon (PSi) photonic structure. Flash photolysis experiments confirmed the photochemical activity of RC after its binding to the solid substrate. The kinetic components of the intraprotein charge recombination were considerably faster (τ(fast) = 14 (±9) ms, τ(slow) = 230 (±28) ms with the RC bound through the GTA cross-linker and only τ(fast) = 27 (±3) ms through peptide coating) than in solution (τ(fast) = 120 (±3) ms, τ(slow) = 1387 (±2) ms), indicating the effect of the PSi surface on the light-induced electron transfer in the protein. The PSi/RC complex was found to oxidize the externally added electron donor, mammalian cytochrome c, and the cytochrome oxidation was blocked by the competitive RC inhibitor, terbutryne. This fact indicates that the specific surface binding sites on the PSi-bound RC are still accessible to external cofactors and an electronic interaction with redox components in the aqueous environment is possible. This new type of biophotonic material is considered to be an excellent model for new generation applications at the interface of silicon-based electronics and biological redox systems designed by nature.
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Affiliation(s)
- Kata Hajdu
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary
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Nagy L, Maróti P, Terazima M. Spectrally silent light induced conformation change in photosynthetic reaction centers. FEBS Lett 2008; 582:3657-62. [PMID: 18840436 DOI: 10.1016/j.febslet.2008.09.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 09/23/2008] [Indexed: 10/21/2022]
Abstract
Spectrally silent conformation change after photoexcitation of photosynthetic reaction centers isolated from Rhodobacter sphaeroides R-26 was observed by the optical heterodyne transient grating technique. The signal showed spectrally silent structural change in photosynthetic reaction centers followed by the primary P+BPh- charge separation and this change remains even after the charge recombination. Without bound quinone to the RC, the conformation change relaxes with about 28micros lifetime. The presence of quinone at the primary quinone (QA) site may suppress this conformation change. However, a weak relaxation with 30-40micros lifetime is still observed under the presence of QA, which increases up to 40micros as a function of the occupancy of the secondary quinone (QB) site.
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Affiliation(s)
- László Nagy
- Institute of Medical Physics and Biophysics, University of Szeged, 6720 Szeged, Rerrich B. tér. 1., Hungary.
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