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Sener M, Strumpfer J, Singharoy A, Hunter CN, Schulten K. Overall energy conversion efficiency of a photosynthetic vesicle. eLife 2016; 5. [PMID: 27564854 PMCID: PMC5001839 DOI: 10.7554/elife.09541] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 07/11/2016] [Indexed: 11/25/2022] Open
Abstract
The chromatophore of purple bacteria is an intracellular spherical vesicle that exists in numerous copies in the cell and that efficiently converts sunlight into ATP synthesis, operating typically under low light conditions. Building on an atomic-level structural model of a low-light-adapted chromatophore vesicle from Rhodobacter sphaeroides, we investigate the cooperation between more than a hundred protein complexes in the vesicle. The steady-state ATP production rate as a function of incident light intensity is determined after identifying quinol turnover at the cytochrome bc1 complex (cytbc1) as rate limiting and assuming that the quinone/quinol pool of about 900 molecules acts in a quasi-stationary state. For an illumination condition equivalent to 1% of full sunlight, the vesicle exhibits an ATP production rate of 82 ATP molecules/s. The energy conversion efficiency of ATP synthesis at illuminations corresponding to 1%–5% of full sunlight is calculated to be 0.12–0.04, respectively. The vesicle stoichiometry, evolutionarily adapted to the low light intensities in the habitat of purple bacteria, is suboptimal for steady-state ATP turnover for the benefit of protection against over-illumination. DOI:http://dx.doi.org/10.7554/eLife.09541.001 Photosynthesis, or the conversion of light energy into chemical energy, is a process that powers almost all life on Earth. Plants and certain bacteria share similar processes to perform photosynthesis, though the purple bacterium Rhodobacter sphaeroides uses a photosynthetic system that is much less complex than that in plants. Light harvesting inside the bacterium takes place in up to hundreds of compartments called chromatophores. Each chromatophore in turn contains hundreds of cooperating proteins that together absorb the energy of sunlight and convert and store it in molecules of ATP, the universal energy currency of all cells. The chromatophore of primitive purple bacteria provides a model for more complex photosynthetic systems in plants. Though researchers had characterized its individual components over the years, less was known about the overall architecture of the chromatophore and how its many components work together to harvest light energy efficiently and robustly. This knowledge would provide insight into the evolutionary pressures that shaped the chromatophore and its ability to work efficiently at different light intensities. Sener et al. now present a highly detailed structural model of the chromatophore of purple bacteria based on the findings of earlier studies. The model features the position of every atom of the constituent proteins and is used to examine how energy is transferred and converted. Sener et al. describe the sequence of energy conversion steps and calculate the overall energy conversion efficiency, namely how much of the light energy arriving at the microorganism is stored as ATP. These calculations show that the chromatophore is optimized to produce chemical energy at low light levels typical of purple bacterial habitats, and dissipate excess energy to avoid being damaged under brighter light. The chromatophore’s architecture also displays robustness against perturbations of its components. In the future, the approach used by Sener et al. to describe light harvesting in this bacterial compartment can be applied to more complex systems, such as those in plants. DOI:http://dx.doi.org/10.7554/eLife.09541.002
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Affiliation(s)
- Melih Sener
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States.,Department of Physics, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Johan Strumpfer
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States.,Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, United States
| | - Abhishek Singharoy
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States
| | - C Neil Hunter
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, United Kingdom
| | - Klaus Schulten
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, United States.,Department of Physics, University of Illinois at Urbana-Champaign, Urbana, United States.,Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, United States
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Cohen Stuart TA, Vengris M, Novoderezhkin VI, Cogdell RJ, Hunter CN, van Grondelle R. Direct visualization of exciton reequilibration in the LH1 and LH2 complexes of Rhodobacter sphaeroides by multipulse spectroscopy. Biophys J 2011; 100:2226-33. [PMID: 21539791 DOI: 10.1016/j.bpj.2011.02.048] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2010] [Revised: 01/12/2011] [Accepted: 02/07/2011] [Indexed: 11/15/2022] Open
Abstract
The dynamics of the excited states of the light-harvesting complexes LH1 and LH2 of Rhodobacter sphaeroides are governed, mainly, by the excitonic nature of these ring-systems. In a pump-dump-probe experiment, the first pulse promotes LH1 or LH2 to its excited state and the second pulse dumps a portion of the excited state. By selective dumping, we can disentangle the dynamics normally hidden in the excited-state manifold. We find that by using this multiple-excitation technique we can visualize a 400-fs reequilibration reflecting relaxation between the two lowest exciton states that cannot be directly explored by conventional pump-probe. An oscillatory feature is observed within the exciton reequilibration, which is attributed to a coherent motion of a vibrational wavepacket with a period of ∼150 fs. Our disordered exciton model allows a quantitative interpretation of the observed reequilibration processes occurring in these antennas.
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Affiliation(s)
- Thomas A Cohen Stuart
- Faculty of Sciences, Free University of Amsterdam, de Boelelaan, Amsterdam, The Netherlands.
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Novoderezhkin VI, Cohen Stuart TA, van Grondelle R. Dynamics of Exciton Relaxation in LH2 Antenna Probed by Multipulse Nonlinear Spectroscopy. J Phys Chem A 2011; 115:3834-44. [DOI: 10.1021/jp108187m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vladimir I. Novoderezhkin
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskie Gory, 119992 Moscow, Russia
| | - Thomas A. Cohen Stuart
- Department of Biophysics, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Biophysics, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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Abstract
The dynamics of excitation energy transfer within the B850 ring of light harvesting complex 2 from Rhodobacter sphaeroides and between neighboring B850 rings is investigated by means of dissipative quantum mechanics. The assumption of Boltzmann populated donor states for the calculation of intercomplex excitation transfer rates by generalized Forster theory is shown to give accurate results since intracomplex exciton relaxation to near-Boltzmann population exciton states occurs within a few picoseconds. The primary channels of exciton transfer between B850 rings are found to be the five lowest-lying exciton states, with non-850 nm exciton states making significant contributions to the total transfer rate.
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Affiliation(s)
- Johan Strümpfer
- Center for Biophysics and Computational Biology and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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van Grondelle R, Novoderezhkin VI. Spectroscopy and Dynamics of Excitation Transfer and Trapping in Purple Bacteria. In: Hunter CN, Daldal F, Thurnauer MC, Beatty JT, editors. The Purple Phototrophic Bacteria. Dordrecht: Springer Netherlands; 2009. pp. 231-52. [DOI: 10.1007/978-1-4020-8815-5_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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6
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Abstract
We overview experimental and theoretical studies of energy transfer in the photosynthetic light-harvesting complexes LH1, LH2, and LHCII performed during the past decade since the discovery of high-resolution structure of these complexes. Experimental findings obtained with various spectroscopic techniques makes possible a modelling of the excitation dynamics at a quantitative level. The modified Redfield theory allows a precise assignment of the energy transfer pathways together with a direct visualization of the whole excitation dynamics where various regimes from a coherent motion of delocalized exciton to a hopping of localized excitations are superimposed. In a single complex it is possible to observe the switching between these regimes driven by slow conformational motion (as we demonstrate for LH2). Excitation dynamics under quenched conditions in higher-plant complexes is discussed.
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Affiliation(s)
- Rienk van Grondelle
- Department of Biophysics, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
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Gerken U, Lupo D, Tietz C, Wrachtrup J, Ghosh R. Circular symmetry of the light-harvesting 1 complex from Rhodospirillum rubrum is not perturbed by interaction with the reaction center. Biochemistry 2003; 42:10354-60. [PMID: 12950162 DOI: 10.1021/bi034969m] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of the interaction of the reaction center (RC) upon the geometrical arrangement of the bacteriochlorophyll a (BChla) pigments in the light-harvesting 1 complex (LH1) from Rhodospirillum rubrum has been examined using single molecule spectroscopy. Fluorescence excitation spectra at 1.8 K obtained from single detergent-solubilized as well as single membrane-reconstituted LH1-RC complexes showed predominantly (>70%) a single broad absorption maximum at 880-900 nm corresponding to the Q(y) transition of the LH1 complex. This absorption band was independent of the polarization direction of the excitation light. The remaining complexes showed two mutually orthogonal absorption bands in the same wavelength region with moderate splittings in the range of DeltaE = 30-85 cm(-1). Our observations are in agreement with simulated spectra of an array of 32 strongly coupled BChla dipoles arranged in perfect circular symmetry possessing only a diagonal disorder of <or=150 cm(-1). However, in contrast to LH1 complexes alone, excitation spectra that consist of a single absorption band were observed more frequently in the presence of the reaction center. Our results show that the interaction of the RC with the LH1 complex stabilizes the circular symmetric arrangement of the bacteriochlorophyll pigments and are in contradiction to recent studies by other groups using single molecule spectroscopy as well as cryoelectronmicroscopy and atomic force microscopy indicating that the RC induces an elliptical distortion of the LH1 complex. Possible reasons for this discrepancy are discussed.
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Affiliation(s)
- Uwe Gerken
- Institute of Physics and Department of Bioenergetics, University of Stuttgart, Germany
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Novoderezhkin V, van Grondelle R. Exciton−Vibrational Relaxation and Transient Absorption Dynamics in LH1 of Rhodopseudomonas viridis: A Redfield Theory Approach. J Phys Chem B 2002. [DOI: 10.1021/jp012048k] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vladimir Novoderezhkin
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia, and Department of Biophysics, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia, and Department of Biophysics, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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9
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Wendling M, Lapouge K, van Mourik F, Novoderezhkin V, Robert B, van Grondelle R. Steady-state spectroscopy of zinc-bacteriopheophytin containing LH1––an in vitro and in silico study. Chem Phys 2002; 275:31-45. [DOI: 10.1016/s0301-0104(01)00527-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Lampoura SS, van Grondelle R, van Stokkum IHM, Cogdell RJ, Wiersma DA, Duppen K. Exciton Dynamics in LH1 and LH2 of Rhodopseudomonas Acidophila and Rhodobium Marinum Probed with Accumulated Photon Echo and Pump−Probe Measurements. J Phys Chem B 2000. [DOI: 10.1021/jp0021289] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefania S. Lampoura
- Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, and Institute of Biomedical and Life Sciences, Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow G12 8QQ, UK
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, and Institute of Biomedical and Life Sciences, Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow G12 8QQ, UK
| | - Ivo H. M. van Stokkum
- Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, and Institute of Biomedical and Life Sciences, Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow G12 8QQ, UK
| | - Richard J. Cogdell
- Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, and Institute of Biomedical and Life Sciences, Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow G12 8QQ, UK
| | - Douwe A. Wiersma
- Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, and Institute of Biomedical and Life Sciences, Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow G12 8QQ, UK
| | - Koos Duppen
- Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, and Institute of Biomedical and Life Sciences, Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow G12 8QQ, UK
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Fiedor L, Scheer H, Hunter C, Tschirschwitz F, Voigt B, Ehlert J, Nibbering E, Leupold D, Elsaesser T. Introduction of a 60 fs deactivation channel in the photosynthetic antenna LH1 by Ni-bacteriopheophytin a. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00112-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Westerhuis WHJ, Hunter CN, van Grondelle R, Niederman RA. Modeling of Oligomeric-State Dependent Spectral Heterogeneity in the B875 Light-Harvesting Complex of Rhodobacter sphaeroides by Numerical Simulation. J Phys Chem B 1999. [DOI: 10.1021/jp991816t] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Willem H. J. Westerhuis
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, U.K., Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854-8082
| | - C. Neil Hunter
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, U.K., Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854-8082
| | - Rienk van Grondelle
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, U.K., Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854-8082
| | - Robert A. Niederman
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, U.K., Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854-8082
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Sundström V, Pullerits T, van Grondelle R. Photosynthetic Light-Harvesting: Reconciling Dynamics and Structure of Purple Bacterial LH2 Reveals Function of Photosynthetic Unit. J Phys Chem B 1999. [DOI: 10.1021/jp983722+] [Citation(s) in RCA: 672] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Pieper J, Rätsep M, Jankowiak R, Irrgang KD, Voigt J, Renger G, Small GJ. Qy-Level Structure and Dynamics of Solubilized Light-Harvesting Complex II of Green Plants: Pressure and Hole Burning Studies. J Phys Chem A 1999. [DOI: 10.1021/jp983957l] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Pieper
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
| | - M. Rätsep
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
| | - R. Jankowiak
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
| | - K.-D. Irrgang
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
| | - J. Voigt
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
| | - G. Renger
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
| | - G. J. Small
- Institute of Physics, Humboldt University, 10099 Berlin, Germany, Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Max-Volmer Institute, Technical University, 10623 Berlin, Germany
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Westerhuis WH, Vos M, van Grondelle R, Amesz J, Niederman RA. Altered organization of light-harvesting complexes in phospholipid-enriched Rhodobacter sphaeroides chromatophores as determined by fluorescence yield and singlet-singlet annihilation measurements. Biochimica et Biophysica Acta (BBA) - Bioenergetics 1998. [DOI: 10.1016/s0005-2728(98)00132-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Monshouwer R, Baltuška A, van Mourik F, van Grondelle R. Time-Resolved Absorption Difference Spectroscopy of the LH-1 Antenna of Rhodopseudomonas viridis. J Phys Chem A 1998. [DOI: 10.1021/jp980412i] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- René Monshouwer
- Department of Physics and Astronomy, Free University of Amsterdam, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Andrius Baltuška
- Department of Physics and Astronomy, Free University of Amsterdam, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Frank van Mourik
- Department of Physics and Astronomy, Free University of Amsterdam, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Free University of Amsterdam, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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Potma EO, Wiersma DA. Exciton superradiance in aggregates: The effect of disorder, higher order exciton-phonon coupling and dimensionality. J Chem Phys 1998. [DOI: 10.1063/1.475898] [Citation(s) in RCA: 128] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Helenius V, Monshouwer R, van Grondelle R. Temperature-Dependent Lifetimes and Quantum Yield of the Singlet and Triplet States of the B820 Subunit of LHI Antenna Complex of Purple Bacterium Rhodospirillum rubrum. J Phys Chem B 1997. [DOI: 10.1021/jp972013d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vesa Helenius
- Department of Physics and Astronomy, Free University of Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - René Monshouwer
- Department of Physics and Astronomy, Free University of Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy, Free University of Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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19
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Yu JY, Nagasawa Y, van Grondelle R, Fleming GR. Three pulse echo peak shift measurements on the B820 subunit of LH1 of Rhodospirillum rubrum. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)01135-4] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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20
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Kennis JTM, Streltsov AM, Permentier H, Aartsma TJ, Amesz J. Exciton Coherence and Energy Transfer in the LH2 Antenna Complex of Rhodopseudomonas acidophila at Low Temperature. J Phys Chem B 1997. [DOI: 10.1021/jp971497a] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John T. M. Kennis
- Department of Biophysics, Huygens Laboratory, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Alexandre M. Streltsov
- Department of Biophysics, Huygens Laboratory, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Hjalmar Permentier
- Department of Biophysics, Huygens Laboratory, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Thijs J. Aartsma
- Department of Biophysics, Huygens Laboratory, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Jan Amesz
- Department of Biophysics, Huygens Laboratory, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands
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Abstract
Observing the elementary steps of light-harvesting in real time is now possible using femtosecond spectroscopy. This, combined with new structural data, has allowed a fairly complete description of light-harvesting in purple bacteria and substantial insights into higher plant antenna systems.
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Affiliation(s)
- G R Fleming
- Department of Chemistry, University of California, Berkeley 94720-1460, USA.
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Wu HM, Ratsep M, Jankowiak R, Cogdell RJ, Small GJ. Comparison of the LH2 Antenna Complexes of Rhodopseudomonas acidophila (Strain 10050) and Rhodobacter sphaeroides by High-Pressure Absorption, High-Pressure Hole Burning, and Temperature-Dependent Absorption Spectroscopies. J Phys Chem B 1997. [DOI: 10.1021/jp9715134] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H.-M. Wu
- Ames LaboratoryUSDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, G128 QQ, U.K
| | - M. Ratsep
- Ames LaboratoryUSDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, G128 QQ, U.K
| | - R. Jankowiak
- Ames LaboratoryUSDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, G128 QQ, U.K
| | - R. J. Cogdell
- Ames LaboratoryUSDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, G128 QQ, U.K
| | - G. J. Small
- Ames LaboratoryUSDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Division of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, G128 QQ, U.K
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Monshouwer R, Abrahamsson M, van Mourik F, van Grondelle R. Superradiance and Exciton Delocalization in Bacterial Photosynthetic Light-Harvesting Systems. J Phys Chem B 1997. [DOI: 10.1021/jp963377t] [Citation(s) in RCA: 333] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- René Monshouwer
- Department of Biophysics, Faculty of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Malin Abrahamsson
- Department of Biophysics, Faculty of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Frank van Mourik
- Department of Biophysics, Faculty of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Biophysics, Faculty of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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24
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Koolhaas MHC, van der Zwan G, Frese RN, van Grondelle R. Red Shift of the Zero Crossing in the CD Spectra of the LH2 Antenna Complex of Rhodopseudomonas acidophila: A Structure-Based Study. J Phys Chem B 1997. [DOI: 10.1021/jp963368k] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. H. C. Koolhaas
- Department of Theoretical and Physical Chemistry and Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - G. van der Zwan
- Department of Theoretical and Physical Chemistry and Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - R. N. Frese
- Department of Theoretical and Physical Chemistry and Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - R. van Grondelle
- Department of Theoretical and Physical Chemistry and Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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25
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Wu H, Small G. Symmetry adapted basis defect patterns for analysis of the effects of energy disorder on cyclic arrays of coupled chromophores. Chem Phys 1997; 218:225-34. [DOI: 10.1016/s0301-0104(97)00074-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Peterman EJG, Pullerits T, van Grondelle R, van Amerongen H. Electron−Phonon Coupling and Vibronic Fine Structure of Light-Harvesting Complex II of Green Plants: Temperature Dependent Absorption and High-Resolution Fluorescence Spectroscopy. J Phys Chem B 1997. [DOI: 10.1021/jp962338e] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erwin J. G. Peterman
- Department of Physics and Astronomy and Institute for Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Chemical Physics, Chemical Center, Lund University, Lund, Sweden
| | - Tõnu Pullerits
- Department of Physics and Astronomy and Institute for Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Chemical Physics, Chemical Center, Lund University, Lund, Sweden
| | - Rienk van Grondelle
- Department of Physics and Astronomy and Institute for Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Chemical Physics, Chemical Center, Lund University, Lund, Sweden
| | - Herbert van Amerongen
- Department of Physics and Astronomy and Institute for Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, and Department of Chemical Physics, Chemical Center, Lund University, Lund, Sweden
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