1
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Navakoudis E, Stergiannakos T, Daskalakis V. A perspective on the major light-harvesting complex dynamics under the effect of pH, salts, and the photoprotective PsbS protein. PHOTOSYNTHESIS RESEARCH 2023; 156:163-177. [PMID: 35816266 PMCID: PMC10070230 DOI: 10.1007/s11120-022-00935-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
The photosynthetic apparatus is a highly modular assembly of large pigment-binding proteins. Complexes called antennae can capture the sunlight and direct it from the periphery of two Photosystems (I, II) to the core reaction centers, where it is converted into chemical energy. The apparatus must cope with the natural light fluctuations that can become detrimental to the viability of the photosynthetic organism. Here we present an atomic scale view of the photoprotective mechanism that is activated on this line of defense by several photosynthetic organisms to avoid overexcitation upon excess illumination. We provide a complete macroscopic to microscopic picture with specific details on the conformations of the major antenna of Photosystem II that could be associated with the switch from the light-harvesting to the photoprotective state. This is achieved by combining insight from both experiments and all-atom simulations from our group and the literature in a perspective article.
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Affiliation(s)
- Eleni Navakoudis
- Department of Chemical Engineering, Cyprus University of Technology, 95 Eirinis Street, 3603, Limassol, Cyprus
| | - Taxiarchis Stergiannakos
- Department of Chemical Engineering, Cyprus University of Technology, 95 Eirinis Street, 3603, Limassol, Cyprus
| | - Vangelis Daskalakis
- Department of Chemical Engineering, Cyprus University of Technology, 95 Eirinis Street, 3603, Limassol, Cyprus.
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2
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Aggregation-related quenching of LHCII fluorescence in liposomes revealed by single-molecule spectroscopy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 218:112174. [PMID: 33799009 DOI: 10.1016/j.jphotobiol.2021.112174] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/04/2021] [Accepted: 03/21/2021] [Indexed: 11/20/2022]
Abstract
Incorporation of membrane proteins into reconstituted lipid membranes is a common approach for studying their structure and function relationship in a native-like environment. In this work, we investigated fluorescence properties of liposome-reconstituted major light-harvesting complexes of plants (LHCII). By utilizing liposome labelling with the fluorescent dye molecules and single-molecule microscopy techniques, we were able to study truly liposome-reconstituted LHCII and compare them with bulk measurements and liposome-free LHCII aggregates bound to the surface. Our results showed that fluorescence lifetime obtained in bulk and in single liposome measurements were correlated. The fluorescence lifetimes of LHCII were shorter for liposome-free LHCII than for reconstituted LHCII. In the case of liposome-reconstituted LHCII, fluorescence lifetime showed dependence on the protein density reminiscent to concentration quenching. The dependence of fluorescence lifetime of LHCII on the liposome size was not significant. Our results demonstrated that fluorescence quenching can be induced by LHCII - LHCII interactions in reconstituted membranes, most likely occurring via the same mechanism as photoprotective non-photochemical quenching in vivo.
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3
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Cipriano R, Martins JPR, Rodrigues LCDA, Falqueto AR, Gontijo ABPL. Impact of saline solution on growth and photosystem II during in vitro cultivation of Bromelia antiacantha (Bromeliaceae). RODRIGUÉSIA 2021. [DOI: 10.1590/2175-7860202172018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Abstract In vitro cultivation is a technique with wide application for micropropagation. However, each species has specific mineral needs for this type of cultivation. The objective was to assess the impacts of the saline solution culture medium on the performance of the photosynthetic apparatus and growth of Bromelia antiacantha during in vitro cultivation, and thus to elucidate the mitigation of the nutritional imbalance that can interfere in the electron transport in the plants. Plants were cultivated in a salt concentration gradient of MS medium (0%, 25%, 50%, 75% or 100%). The growth traits and fluorescence a chlorophyll were analyzed. Intermediate concentrations of MS medium resulted in plants with a larger number of leaves and longer root length. The OJIP curves and results of the JIP test showed that the plants grown without MS salts presented less efficient photosystem II (PSII), as indicated by the performance index [Pi(total)]. In contrast, the intermediate concentrations (MS 25% and 50%) had a positive effect on the performance of the photosynthetic apparatus. The MS 25% medium can be used for in vitro cultivation of B. antiacantha, enabling the development of plants with suitable physiological qualities for planting in the field.
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4
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Bennett DIG, Amarnath K, Park S, Steen CJ, Morris JM, Fleming GR. Models and mechanisms of the rapidly reversible regulation of photosynthetic light harvesting. Open Biol 2019; 9:190043. [PMID: 30966997 PMCID: PMC6501642 DOI: 10.1098/rsob.190043] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 03/07/2019] [Indexed: 02/02/2023] Open
Abstract
The rapid response of photosynthetic organisms to fluctuations in ambient light intensity is incompletely understood at both the molecular and membrane levels. In this review, we describe research from our group over a 10-year period aimed at identifying the photophysical mechanisms used by plants, algae and mosses to control the efficiency of light harvesting by photosystem II on the seconds-to-minutes time scale. To complement the spectroscopic data, we describe three models capable of describing the measured response at a quantitative level. The review attempts to provide an integrated view that has emerged from our work, and briefly looks forward to future experimental and modelling efforts that will refine and expand our understanding of a process that significantly influences crop yields.
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Affiliation(s)
- Doran I. G. Bennett
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Kapil Amarnath
- Department of Physics, University of California San Diego, La Jolla, CA 92093, USA
| | - Soomin Park
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Labs, Berkeley, CA 94720, USA
| | - Collin J. Steen
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Labs, Berkeley, CA 94720, USA
| | - Jonathan M. Morris
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Labs, Berkeley, CA 94720, USA
| | - Graham R. Fleming
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Labs, Berkeley, CA 94720, USA
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5
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Wang ZG, Li N, Wang T, Ding B. Surface-Guided Chemical Processes on Self-Assembled DNA Nanostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14954-14962. [PMID: 29884022 DOI: 10.1021/acs.langmuir.8b01060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Solid-liquid interfaces have been of great significance in the activation of chemical reactions via restricting the conformation or orientation of the reactants. Self-assembled DNA nanostructures encoded with tremendous chemical and physical information provide an efficient platform to unravel and regulate mechanisms of surface chemical processes. In this review, we discuss the surface addressability, morphological features, and charged properties of DNA nanostructures as well as the recognition, catalytic, and dynamic properties of DNA molecules. We highlight the synergies between the surface properties of DNA nanostructures and the molecular features of DNA strands, which is a key to the synthesis of conductive polymer nanomaterials with well-defined shapes or electronic/optical properties. We also focus on the control over the substrate channeling pathways of enzyme networks or metal nucleation on DNA nanostructures toward the production of specifically emissive metal nanoclusters. In the end, we provide an outlook of future possible directions based on the rational design of DNA-based self-assembly, including dynamic energy transfer, stimuli-responsive synthesis, and programmable activation of the mechanophores on the surfaces of DNA nanostructures.
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Affiliation(s)
- Zhen-Gang Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Na Li
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Ting Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Baoquan Ding
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
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6
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Tutkus M, Akhtar P, Chmeliov J, Görföl F, Trinkunas G, Lambrev PH, Valkunas L. Fluorescence Microscopy of Single Liposomes with Incorporated Pigment-Proteins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14410-14418. [PMID: 30380887 DOI: 10.1021/acs.langmuir.8b02307] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Reconstitution of transmembrane proteins into liposomes is a widely used method to study their behavior under conditions closely resembling the natural ones. However, this approach does not allow precise control of the liposome size, reconstitution efficiency, and the actual protein-to-lipid ratio in the formed proteoliposomes, which might be critical for some applications and/or interpretation of data acquired during the spectroscopic measurements. Here, we present a novel strategy employing methods of proteoliposome preparation, fluorescent labeling, purification, and surface immobilization that allow us to quantify these properties using fluorescence microscopy at the single-liposome level and for the first time apply it to study photosynthetic pigment-protein complexes LHCII. We show that LHCII proteoliposome samples, even after purification with a density gradient, always contain a fraction of nonreconstituted protein and are extremely heterogeneous in both protein density and liposome sizes. This strategy enables quantitative analysis of the reconstitution efficiency of different protocols and precise fluorescence spectroscopic study of various transmembrane proteins in a controlled nativelike environment.
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Affiliation(s)
- Marijonas Tutkus
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
| | - Parveen Akhtar
- Biological Research Centre , Hungarian Academy of Sciences , Temesvári körút 62 , 6726 Szeged , Hungary
| | - Jevgenij Chmeliov
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
- Institute of Chemical Physics, Faculty of Physics , Vilnius University , Saulėtekio Avenue 9-III , LT-10222 Vilnius , Lithuania
| | - Fanni Görföl
- Biological Research Centre , Hungarian Academy of Sciences , Temesvári körút 62 , 6726 Szeged , Hungary
| | - Gediminas Trinkunas
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
| | - Petar H Lambrev
- Biological Research Centre , Hungarian Academy of Sciences , Temesvári körút 62 , 6726 Szeged , Hungary
| | - Leonas Valkunas
- Department of Molecular Compound Physics , Centre for Physical Sciences and Technology , Saulėtekio Avenue 3 , LT-10257 Vilnius , Lithuania
- Institute of Chemical Physics, Faculty of Physics , Vilnius University , Saulėtekio Avenue 9-III , LT-10222 Vilnius , Lithuania
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7
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Adams PG, Vasilev C, Hunter CN, Johnson MP. Correlated fluorescence quenching and topographic mapping of Light-Harvesting Complex II within surface-assembled aggregates and lipid bilayers. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2018; 1859:1075-1085. [PMID: 29928860 PMCID: PMC6135645 DOI: 10.1016/j.bbabio.2018.06.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 06/11/2018] [Accepted: 06/15/2018] [Indexed: 01/30/2023]
Abstract
Light-Harvesting Complex II (LHCII) is a chlorophyll-protein antenna complex that efficiently absorbs solar energy and transfers electronic excited states to photosystems I and II. Under excess light intensity LHCII can adopt a photoprotective state in which excitation energy is safely dissipated as heat, a process known as Non-Photochemical Quenching (NPQ). In vivo NPQ is triggered by combinatorial factors including transmembrane ΔpH, PsbS protein and LHCII-bound zeaxanthin, leading to dramatically shortened LHCII fluorescence lifetimes. In vitro, LHCII in detergent solution or in proteoliposomes can reversibly adopt an NPQ-like state, via manipulation of detergent/protein ratio, lipid/protein ratio, pH or pressure. Previous spectroscopic investigations revealed changes in exciton dynamics and protein conformation that accompany quenching, however, LHCII-LHCII interactions have not been extensively studied. Here, we correlated fluorescence lifetime imaging microscopy (FLIM) and atomic force microscopy (AFM) of trimeric LHCII adsorbed to mica substrates and manipulated the environment to cause varying degrees of quenching. AFM showed that LHCII self-assembled onto mica forming 2D-aggregates (25-150 nm width). FLIM determined that LHCII in these aggregates were in a quenched state, with much lower fluorescence lifetimes (~0.25 ns) compared to free LHCII in solution (2.2-3.9 ns). LHCII-LHCII interactions were disrupted by thylakoid lipids or phospholipids, leading to intermediate fluorescent lifetimes (0.6-0.9 ns). To our knowledge, this is the first in vitro correlation of nanoscale membrane imaging with LHCII quenching. Our findings suggest that lipids could play a key role in modulating the extent of LHCII-LHCII interactions within the thylakoid membrane and so the propensity for NPQ activation.
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Affiliation(s)
- Peter G Adams
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK; Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK.
| | - Cvetelin Vasilev
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, UK
| | - C Neil Hunter
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, UK
| | - Matthew P Johnson
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, UK
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8
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Gelzinis A, Chmeliov J, Ruban AV, Valkunas L. Can red-emitting state be responsible for fluorescence quenching in LHCII aggregates? PHOTOSYNTHESIS RESEARCH 2018; 135:275-284. [PMID: 28825173 DOI: 10.1007/s11120-017-0430-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
Non-photochemical quenching (NPQ) is responsible for protecting the light-harvesting apparatus of plants from damage at high light conditions. Although it is agreed that the major part of NPQ, an energy-dependent quenching (qE), originates in the light-harvesting antenna, its exact mechanism is still debated. In our earlier work (Chmeliov et al. in Nat Plants 2:16045, 2016), we have analyzed the time-resolved fluorescence (TRF) from the trimers and aggregates of the major light-harvesting complexes of plants (LHCII) over a broad temperature range and came to a conclusion that three distinct states are required to describe the experimental data: two of them correspond to the emission bands centered at ~680 and ~700 nm, and the third state is responsible for the excitation quenching. This was opposite to earlier suggestions of a two-state model, where the red-shifted fluorescence and excitation quenching were assumed to be related. To examine such possibility, in the current work we repeat our analysis of the TRF data in terms of the two-state model. We find that even though it can reasonably describe the aggregate fluorescence, it fails to do so for the LHCII trimers. We conclude that the red-emitting state cannot be responsible for fluorescence quenching in the LHCII aggregates and reaffirm that the three-state model is the simplest possible description of the experimental data.
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Affiliation(s)
- Andrius Gelzinis
- Department of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, LT-10222, Vilnius, Lithuania
- Department of Molecular Compound Physics, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257, Vilnius, Lithuania
| | - Jevgenij Chmeliov
- Department of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, LT-10222, Vilnius, Lithuania
- Department of Molecular Compound Physics, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257, Vilnius, Lithuania
| | - Alexander V Ruban
- The School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Leonas Valkunas
- Department of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, LT-10222, Vilnius, Lithuania.
- Department of Molecular Compound Physics, Center for Physical Sciences and Technology, Saulėtekio Ave. 3, LT-10257, Vilnius, Lithuania.
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9
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Chenu A, Keren N, Paltiel Y, Nevo R, Reich Z, Cao J. Light Adaptation in Phycobilisome Antennas: Influence on the Rod Length and Structural Arrangement. J Phys Chem B 2017; 121:9196-9202. [DOI: 10.1021/acs.jpcb.7b07781] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aurélia Chenu
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Singapore-MIT Alliance for Research and Technology, 138602 Singapore
| | - Nir Keren
- Department
of Plant and Environmental Sciences, Alexander Silberman Institute
of Life Sciences, Givat Ram, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
| | - Yossi Paltiel
- Department
of Plant and Environmental Sciences, Alexander Silberman Institute
of Life Sciences, Givat Ram, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
| | - Reinat Nevo
- Department
of Biomolecular Sciences, Weizmann Institute of Science, 7610001 Rehovot, Israel
| | - Ziv Reich
- Department
of Biomolecular Sciences, Weizmann Institute of Science, 7610001 Rehovot, Israel
| | - Jianshu Cao
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Singapore-MIT Alliance for Research and Technology, 138602 Singapore
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10
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Hadmojo WT, Yim D, Aqoma H, Ryu DY, Shin TJ, Kim HW, Hwang E, Jang WD, Jung IH, Jang SY. Artificial light-harvesting n-type porphyrin for panchromatic organic photovoltaic devices. Chem Sci 2017; 8:5095-5100. [PMID: 28970895 PMCID: PMC5613227 DOI: 10.1039/c7sc01275f] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 05/11/2017] [Indexed: 12/22/2022] Open
Abstract
We developed a novel NIR-harvesting n-type porphyrin derivative, PDI–PZn–PDI, that shows a low bandgap of 1.27 eV. Panchromatic absorption was extended to the NIR area with a significantly low energy loss of 0.54 eV which led to promising photovoltaic performance.
A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPVs) was developed. The n-type acceptor, PDI–PZn–PDI, was designed by connecting a zinc porphyrin (PZn) core to two perylenediimide (PDI) wings through ethyne bridges. A narrow bandgap of 1.27 eV was achieved through the extended π-conjugation and intramolecular charge transfer between the strongly electron-donating PZn core and the electron-accepting PDI wings. A bulk heterojunction (BHJ) structured photovoltaic device fabricated from PDI–PZn–PDI with PTB7-Th exhibited panchromatic photon-to-current conversion from 350 to 900 nm. A power conversion efficiency of 5.25% with a remarkably low Eloss of 0.54 eV was achieved by optimizing the nanomorphology of the BHJ films by adding pyridine and by controlling the ZnO/BHJ interfacial properties.
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Affiliation(s)
- Wisnu Tantyo Hadmojo
- Department of Chemistry , Kookmin University , 77 Jeongneung-ro, Seongbuk-gu , Seoul 02707 , Republic of Korea . ;
| | - Dajeong Yim
- Department of Chemistry , Yonsei University , 50 Yonsei-ro, Seodaemun-gu , Seoul , Republic of Korea .
| | - Havid Aqoma
- Department of Chemistry , Kookmin University , 77 Jeongneung-ro, Seongbuk-gu , Seoul 02707 , Republic of Korea . ;
| | - Du Yeol Ryu
- Department of Chemistry , Yonsei University , 50 Yonsei-ro, Seodaemun-gu , Seoul , Republic of Korea .
| | - Tae Joo Shin
- UNIST Central Research Facilities , School of Natural Science , Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Eonyang-eup, Ulju-gun , Ulsan , Republic of Korea
| | - Hyun Woo Kim
- Center for Molecular Modeling and Simulation , Korea Research Institute of Chemical Technology (KRICT) , 141 Gajeong-ro, Yuseong-gu , Daejeon , Republic of Korea
| | - Eojin Hwang
- Department of Chemistry , Yonsei University , 50 Yonsei-ro, Seodaemun-gu , Seoul , Republic of Korea .
| | - Woo-Dong Jang
- Department of Chemistry , Yonsei University , 50 Yonsei-ro, Seodaemun-gu , Seoul , Republic of Korea .
| | - In Hwan Jung
- Department of Chemistry , Kookmin University , 77 Jeongneung-ro, Seongbuk-gu , Seoul 02707 , Republic of Korea . ;
| | - Sung-Yeon Jang
- Department of Chemistry , Kookmin University , 77 Jeongneung-ro, Seongbuk-gu , Seoul 02707 , Republic of Korea . ;
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11
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Yim D, Sung J, Kim S, Oh J, Yoon H, Sung YM, Kim D, Jang WD. Guest-Induced Modulation of the Energy Transfer Process in Porphyrin-Based Artificial Light Harvesting Dendrimers. J Am Chem Soc 2016; 139:993-1002. [DOI: 10.1021/jacs.6b11804] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Dajeong Yim
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Jooyoung Sung
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Serom Kim
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Juwon Oh
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Hongsik Yoon
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Young Mo Sung
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Dongho Kim
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Woo-Dong Jang
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
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12
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Kreisbeck C, Aspuru-Guzik A. Efficiency of energy funneling in the photosystem II supercomplex of higher plants. Chem Sci 2016; 7:4174-4183. [PMID: 30155062 PMCID: PMC6014079 DOI: 10.1039/c5sc04296h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/24/2016] [Indexed: 01/16/2023] Open
Abstract
The investigation of energy transfer properties in photosynthetic multi-protein networks gives insight into their underlying design principles. Here, we discuss the excitonic energy transfer mechanisms of the photosystem II (PS-II) C2S2M2 supercomplex, which is the largest isolated functional unit of the photosynthetic apparatus of higher plants. Despite the lack of a definite energy gradient in C2S2M2, we show that the energy transfer is directed by relaxation to low energy states. C2S2M2 is not organized to form pathways with strict energetically downhill transfer, which has direct consequences for the transfer efficiency, transfer pathways and transfer limiting steps. The exciton dynamics is sensitive to small changes in the energetic layout which, for instance, are induced by the reorganization of vibrational coordinates. In order to incorporate the reorganization process in our numerical simulations, we go beyond rate equations and use the hierarchically coupled equation of motion approach (HEOM). While transfer from the peripheral antenna to the proteins in proximity to the reaction center occurs on a faster time scale, the final step of the energy transfer to the RC core is rather slow, and thus the limiting step in the transfer chain. Our findings suggest that the structure of the PS-II supercomplex guarantees photoprotection rather than optimized efficiency.
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Affiliation(s)
- Christoph Kreisbeck
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , MA , USA . ;
| | - Alán Aspuru-Guzik
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , MA , USA . ;
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13
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Yamamoto Y. Born in 1949 in postwar Japan. PHOTOSYNTHESIS RESEARCH 2016; 127:25-32. [PMID: 25557391 DOI: 10.1007/s11120-014-0072-y] [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: 11/06/2014] [Accepted: 12/18/2014] [Indexed: 06/04/2023]
Abstract
In this article, I would like to look back at my life as a researcher of photosynthesis. I was born in 1949, and grew up and was educated in postwar Japan in the 1950s and 1960s. I have studied photosynthesis, in particular Photosystem II, after research experiences in the USA and UK. My study of Photosystem II has continued over 43 years until now. Through the present retrospection, I would like to suggest that all photosynthesis researchers, including the members of the "49ers", many other established scientists, and young students as well, should not simply stay in the lab working hard on their studies and writing papers; but should also do something for the public. People want to learn from us about many critical social issues such as the environment, food, energy and, most importantly, peace. I believe that our knowledge must form an important basis for people to take action to create a peaceful and harmonious human society.
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Affiliation(s)
- Yasusi Yamamoto
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
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14
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Chmeliov J, Trinkunas G, van Amerongen H, Valkunas L. Excitation migration in fluctuating light-harvesting antenna systems. PHOTOSYNTHESIS RESEARCH 2016; 127:49-60. [PMID: 25605669 DOI: 10.1007/s11120-015-0083-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 01/07/2015] [Indexed: 06/04/2023]
Abstract
Complex multi-exponential fluorescence decay kinetics observed in various photosynthetic systems like photosystem II (PSII) have often been explained by the reversible quenching mechanism of the charge separation taking place in the reaction center (RC) of PSII. However, this description does not account for the intrinsic dynamic disorder of the light-harvesting proteins as well as their fluctuating dislocations within the antenna, which also facilitate the repair of RCs, state transitions, and the process of non-photochemical quenching. Since dynamic fluctuations result in varying connectivity between pigment-protein complexes, they can also lead to non-exponential excitation decay kinetics. Based on this presumption, we have recently proposed a simple conceptual model describing excitation diffusion in a continuous medium and accounting for possible variations of the excitation transfer pathways. In the current work, this model is further developed and then applied to describe fluorescence kinetics originating from very diverse antenna systems, ranging from PSII of various sizes to LHCII aggregates and even the entire thylakoid membrane. In all cases, complex multi-exponential fluorescence kinetics are perfectly reproduced on the entire relevant time scale without assuming any radical pair equilibration at the side of the excitation quencher, but using just a few parameters reflecting the mean excitation energy transfer rate as well as the overall average organization of the photosynthetic antenna.
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Affiliation(s)
- Jevgenij Chmeliov
- Department of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, 10222, Vilnius, Lithuania
- Institute of Physics, Center for Physical Sciences and Technology, Gostauto 11, 01108, Vilnius, Lithuania
| | - Gediminas Trinkunas
- Department of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, 10222, Vilnius, Lithuania
- Institute of Physics, Center for Physical Sciences and Technology, Gostauto 11, 01108, Vilnius, Lithuania
| | - Herbert van Amerongen
- Laboratory of Biophysics, Wageningen University, P.O. Box 8128, 6700, Wageningen, The Netherlands
| | - Leonas Valkunas
- Department of Theoretical Physics, Faculty of Physics, Vilnius University, Saulėtekio Ave. 9, 10222, Vilnius, Lithuania.
- Institute of Physics, Center for Physical Sciences and Technology, Gostauto 11, 01108, Vilnius, Lithuania.
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15
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Mourokh LG, Nori F. Energy transfer efficiency in the chromophore network strongly coupled to a vibrational mode. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:052720. [PMID: 26651736 DOI: 10.1103/physreve.92.052720] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Indexed: 06/05/2023]
Abstract
Using methods from condensed matter and statistical physics, we examine the transport of excitons through the photosynthetic complex from a receiving antenna to a reaction center. Writing the equations of motion for the exciton creation-annihilation operators, we are able to describe the exciton dynamics, even in the regime when the reorganization energy is of the order of the intrasystem couplings. We determine the exciton transfer efficiency in the presence of a quenching field and protein environment. While the majority of the protein vibrational modes are treated as a heat bath, we address the situation when specific modes are strongly coupled to excitons and examine the effects of these modes on the energy transfer efficiency in the steady-state regime. Using the structural parameters of the Fenna-Matthews-Olson complex, we find that, for vibrational frequencies below 16 meV, the exciton transfer is drastically suppressed. We attribute this effect to the formation of a "mixed exciton-vibrational mode" where the exciton is transferred back and forth between the two pigments with the absorption or emission of vibrational quanta, instead of proceeding to the reaction center. The same effect suppresses the quantum beating at the vibrational frequency of 25 meV. We also show that the efficiency of the energy transfer can be enhanced when the vibrational mode strongly couples to the third pigment only, instead of coupling to the entire system.
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Affiliation(s)
- Lev G Mourokh
- Department of Physics, Queens College, City University of New York, Flushing, New York 11367, USA
- Graduate Center of CUNY, New York, New York 10016, USA
| | - Franco Nori
- CEMS, RIKEN, Saitama, 351-0198, Japan
- Physics Department, University of Michigan, Ann Arbor, Michigan 48109-1040, USA
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16
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Duffy CD, Ruban AV. Dissipative pathways in the photosystem-II antenna in plants. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 152:215-26. [DOI: 10.1016/j.jphotobiol.2015.09.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/07/2015] [Accepted: 09/11/2015] [Indexed: 10/23/2022]
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17
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Derks A, Schaven K, Bruce D. Diverse mechanisms for photoprotection in photosynthesis. Dynamic regulation of photosystem II excitation in response to rapid environmental change. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:468-485. [DOI: 10.1016/j.bbabio.2015.02.008] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 02/03/2015] [Accepted: 02/07/2015] [Indexed: 12/26/2022]
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18
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Ruban AV. Evolution under the sun: optimizing light harvesting in photosynthesis. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:7-23. [PMID: 25336689 DOI: 10.1093/jxb/eru400] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The emergence and evolution of life on our planet was possible because the sun provides energy to our biosphere. Indeed, all life forms need energy for existence and proliferation in space and time. Light-energy conversion takes place in photosynthetic organisms that evolve in various environments featuring an impressive range of light intensities that span several orders of magnitude. This property is achieved by the evolution of mechanisms of efficient energy capture that involved development of antenna pigments and pigment-protein complexes as well as the emergence of various strategies on the organismal, cellular, and molecular levels to counteract the detrimental effects of high light intensity on the delicate photosynthetic apparatus. Darwin was one of the first to describe the behaviour of plants towards light. He noticed that some plants try to avoid full daylight and called this reaction paraheliotropism. However, it was only in the second half of the 20th century, when scientists began to discover the structure and molecular mechanisms of the photosynthetic machinery, that the reasons for paraheliotropisms became clear. This review explains the need for the evolution of light adaptations using the example of higher plants. The review focuses on short-term adaptation mechanisms that occur on the minute scale, showing that these processes are fast enough to track rapid fluctuations in light intensity and that they evolved to be effective, allowing for the expansion of plant habitats and promoting diversification and survival. Also introduced are the most recent developments in methods that enable quantification of the light intensities that can be tolerated by plants.
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Affiliation(s)
- Alexander V Ruban
- School of Biological and Chemical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
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19
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Chmeliov J, Bricker WP, Lo C, Jouin E, Valkunas L, Ruban AV, Duffy CDP. An ‘all pigment’ model of excitation quenching in LHCII. Phys Chem Chem Phys 2015; 17:15857-67. [DOI: 10.1039/c5cp01905b] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This work presents the first all-pigment microscopic model of a major light-harvesting complex of plants and the first attempt to capture the dissipative character of the known structure.
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Affiliation(s)
- Jevgenij Chmeliov
- Department of Theoretical Physics
- Faculty of Physics
- Vilnius University
- LT-10222 Vilnius
- Lithuania
| | - William P. Bricker
- Department of Energy
- Environmental and Chemical Engineering
- Washington University in St. Louis
- Saint Louis
- USA
| | - Cynthia Lo
- Department of Energy
- Environmental and Chemical Engineering
- Washington University in St. Louis
- Saint Louis
- USA
| | - Elodie Jouin
- The School of Biological and Chemical Sciences
- Queen Mary
- University of London
- London E1 4NS
- UK
| | - Leonas Valkunas
- Department of Theoretical Physics
- Faculty of Physics
- Vilnius University
- LT-10222 Vilnius
- Lithuania
| | - Alexander V. Ruban
- The School of Biological and Chemical Sciences
- Queen Mary
- University of London
- London E1 4NS
- UK
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20
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Kreisbeck C, Kramer T, Aspuru-Guzik A. Scalable High-Performance Algorithm for the Simulation of Exciton Dynamics. Application to the Light-Harvesting Complex II in the Presence of Resonant Vibrational Modes. J Chem Theory Comput 2014; 10:4045-54. [DOI: 10.1021/ct500629s] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christoph Kreisbeck
- Institut
für Physik, Humboldt-Universität zu Berlin, Newtonstr.
15, 12489 Berlin, Germany
| | - Tobias Kramer
- Mads
Clausen Institute, University of Southern Denmark, Alsion 2, 6400 Sønderborg, Denmark
| | - Alán Aspuru-Guzik
- Department
of Chemistry and Chemical Biology, Harvard University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
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21
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Yamamoto Y, Kai S, Ohnishi A, Tsumura N, Ishikawa T, Hori H, Morita N, Ishikawa Y. Quality control of PSII: behavior of PSII in the highly crowded grana thylakoids under excessive light. PLANT & CELL PHYSIOLOGY 2014; 55:1206-15. [PMID: 24610582 PMCID: PMC4080270 DOI: 10.1093/pcp/pcu043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 02/22/2014] [Indexed: 05/19/2023]
Abstract
The grana thylakoids of higher plant chloroplasts are crowded with PSII and the associated light-harvesting complexes (LHCIIs). They constitute supercomplexes, and often form semi-crystalline arrays in the grana. The crowded condition of the grana may be necessary for efficient trapping of excitation energy by LHCII under weak light, but it might hinder proper movement of LHCII necessary for reversible aggregation of LHCII in the energy-dependent quenching of Chl fluorescence under moderate high light. When the thylakoids are illuminated with extreme high light, the reaction center-binding D1 protein of PSII is photodamaged, and the damaged protein migrates to the grana margins for degradation and subsequent repair. In both moderate and extreme high-light conditions, fluidity of the thylakoid membrane is crucial. In this review, we first provide an overview of photoprotective processes, then discuss changes in membrane fluidity and mobility of the protein complexes in the grana under excessive light, which are closely associated with photoprotection of PSII. We hypothesize that reversible aggregation of LHCII, which is necessary to avoid light stress under moderate high light, and swift turnover of the photodamaged D1 protein under extreme high light are threatened by irreversible protein aggregation induced by reactive oxygen species in photochemical reactions.
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Affiliation(s)
- Yasusi Yamamoto
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Suguru Kai
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Atsuki Ohnishi
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Nodoka Tsumura
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Tomomi Ishikawa
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Haruka Hori
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Noriko Morita
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
| | - Yasuo Ishikawa
- Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530 Japan
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22
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Chmeliov J, Trinkunas G, van Amerongen H, Valkunas L. Light harvesting in a fluctuating antenna. J Am Chem Soc 2014; 136:8963-72. [PMID: 24870124 DOI: 10.1021/ja5027858] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One of the major players in oxygenic photosynthesis, photosystem II (PSII), exhibits complex multiexponential fluorescence decay kinetics that for decades has been ascribed to reversible charge separation taking place in the reaction center (RC). However, in this description the protein dynamics is not taken into consideration. The intrinsic dynamic disorder of the light-harvesting proteins along with their fluctuating dislocations within the antenna inevitably result in varying connectivity between pigment-protein complexes and therefore can also lead to nonexponential excitation decay kinetics. On the basis of this presumption, we propose a simple conceptual model describing excitation diffusion in a continuous medium and accounting for possible variations of the excitation transfer rates. Recently observed fluorescence kinetics of PSII of different sizes are perfectly reproduced with only two adjustable parameters instead of the many decay times and amplitudes required in standard analysis procedures; no charge recombination in the RC is required. The model is also able to provide valuable information about the structural and functional organization of the photosynthetic antenna and in a straightforward way solves various contradictions currently existing in the literature.
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Affiliation(s)
- Jevgenij Chmeliov
- Department of Theoretical Physics, Faculty of Physics, Vilnius University , Sauletekio Avenue 9, LT-10222 Vilnius, Lithuania
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23
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Yamamoto Y, Hori H, Kai S, Ishikawa T, Ohnishi A, Tsumura N, Morita N. Quality control of Photosystem II: reversible and irreversible protein aggregation decides the fate of Photosystem II under excessive illumination. FRONTIERS IN PLANT SCIENCE 2013; 4:433. [PMID: 24194743 PMCID: PMC3810940 DOI: 10.3389/fpls.2013.00433] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Accepted: 10/11/2013] [Indexed: 05/20/2023]
Abstract
In response to excessive light, the thylakoid membranes of higher plant chloroplasts show dynamic changes including the degradation and reassembly of proteins, a change in the distribution of proteins, and large-scale structural changes such as unstacking of the grana. Here, we examined the aggregation of light-harvesting chlorophyll-protein complexes and Photosystem II core subunits of spinach thylakoid membranes under light stress with 77K chlorophyll fluorescence; aggregation of these proteins was found to proceed with increasing light intensity. Measurement of changes in the fluidity of thylakoid membranes with fluorescence polarization of diphenylhexatriene showed that membrane fluidity increased at a light intensity of 500-1,000 μmol photons m(-) (2) s(-) (1), and decreased at very high light intensity (1,500 μmol photons m(-) (2) s(-) (1)). The aggregation of light-harvesting complexes at moderately high light intensity is known to be reversible, while that of Photosystem II core subunits at extremely high light intensity is irreversible. It is likely that the reversibility of protein aggregation is closely related to membrane fluidity: increases in fluidity should stimulate reversible protein aggregation, whereas irreversible protein aggregation might decrease membrane fluidity. When spinach leaves were pre-illuminated with moderately high light intensity, the qE component of non-photochemical quenching and the optimum quantum yield of Photosystem II increased, indicating that Photosystem II/light-harvesting complexes rearranged in the thylakoid membranes to optimize Photosystem II activity. Transmission electron microscopy revealed that the thylakoids underwent partial unstacking under these light stress conditions. Thus, protein aggregation is involved in thylakoid dynamics and regulates photochemical reactions, thereby deciding the fate of Photosystem II.
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Affiliation(s)
- Yasusi Yamamoto
- *Correspondence: Yasusi Yamamoto, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan e-mail:
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