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Reinot T, Khmelnitskiy A, Kell A, Jassas M, Jankowiak R. Exciton Lifetime Distributions and Population Dynamics in the FMO Protein Complex from Prosthecochloris aestuarii. ACS OMEGA 2021; 6:5990-6008. [PMID: 33681637 PMCID: PMC7931385 DOI: 10.1021/acsomega.1c00286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
Significant protein rearrangement upon excitation and energy transfer in Fenna-Matthews-Olson protein of Prosthecochloris aestuarii results in a modified energy landscape, which induces more changes in pigment site energies than predicted by the "standard" hole-burning theory. The energy changes are elucidated by simulations while investigating the effects of site-dependent disorder, both static (site-energy distribution widths) and dynamic (spectral density shapes). The resulting optimized site energies and their fluctuations are consistent with relative differences observed in inhomogeneous widths calculated by recent molecular dynamic simulations. Two sets of different spectral densities reveal how their shapes affect the population dynamics and distribution of exciton lifetimes. Calculations revealed the wavelength-dependent distributions of exciton lifetimes (T 1) in the femtosecond to picosecond time frame. We suggest that the calculated multimodal and asymmetric wavelength-dependent T 1 distributions offer more insight into the interpretation of resonant hole-burned (HB) spectra, kinetic traces in two-dimensional (2D) electronic spectroscopy experiments, and widely used global analyses in fitting data from transient absorption experiments.
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Affiliation(s)
- Tonu Reinot
- Department
of Chemistry, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Anton Khmelnitskiy
- Department
of Chemistry, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Adam Kell
- Department
of Chemistry, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Mahboobe Jassas
- Department
of Chemistry, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Ryszard Jankowiak
- Department
of Chemistry, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
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2
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Klinger A, Lindorfer D, Müh F, Renger T. Normal mode analysis of spectral density of FMO trimers: Intra- and intermonomer energy transfer. J Chem Phys 2020; 153:215103. [PMID: 33291900 DOI: 10.1063/5.0027994] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The intermolecular contribution to the spectral density of the exciton-vibrational coupling of the homotrimeric Fenna-Matthews-Olson (FMO) light-harvesting protein of green sulfur bacteria P. aestuarii is analyzed by combining a normal mode analysis of the protein with the charge density coupling method for the calculation of local transition energies of the pigments. Correlations in site energy fluctuations across the whole FMO trimer are found at low vibrational frequencies. Including, additionally, the high-frequency intrapigment part of the spectral density, extracted from line-narrowing spectra, we study intra- and intermonomer exciton transfer. Whereas the intrapigment part of the spectral density is important for fast intramonomer exciton relaxation, the intermolecular contributions (due to pigment-environment coupling) determine the intermonomer exciton transfer. Neither the variations of the local Huang-Rhys factors nor the correlations in site energy fluctuations have a critical influence on energy transfer. At room temperature, the intermonomer transfer in the FMO protein occurs on a 10 ps time scale, whereas intramonomer exciton equilibration is roughly two orders of magnitude faster. At cryogenic temperatures, intermonomer transfer limits the lifetimes of the lowest exciton band. The lifetimes are found to increase between 20 ps in the center of this band up to 100 ps toward lower energies, which is in very good agreement with the estimates from hole burning data. Interestingly, exciton delocalization in the FMO monomers is found to slow down intermonomer energy transfer, at both physiological and cryogenic temperatures.
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Affiliation(s)
- Alexander Klinger
- Institut für Theoretische Physik, Johannes Kepler Universität Linz, Altenberger Str. 69, 4040 Linz, Austria
| | - Dominik Lindorfer
- Institut für Theoretische Physik, Johannes Kepler Universität Linz, Altenberger Str. 69, 4040 Linz, Austria
| | - Frank Müh
- Institut für Theoretische Physik, Johannes Kepler Universität Linz, Altenberger Str. 69, 4040 Linz, Austria
| | - Thomas Renger
- Institut für Theoretische Physik, Johannes Kepler Universität Linz, Altenberger Str. 69, 4040 Linz, Austria
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3
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Kell A, Khmelnitskiy AY, Reinot T, Jankowiak R. On uncorrelated inter-monomer Förster energy transfer in Fenna-Matthews-Olson complexes. J R Soc Interface 2020; 16:20180882. [PMID: 30958204 DOI: 10.1098/rsif.2018.0882] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The Fenna-Matthews-Olson (FMO) light-harvesting antenna protein of green sulfur bacteria is a long-studied pigment-protein complex which funnels energy from the chlorosome to the reaction centre where photochemistry takes place. The structure of the FMO protein from Chlorobaculum tepidum is known as a homotrimeric complex containing eight bacteriochlorophyll a per monomer. Owing to this structure FMO has strong intra-monomer and weak inter-monomer electronic coupling constants. While long-lived (sub-picosecond) coherences within a monomer have been a prevalent topic of study over the past decade, various experimental evidence supports the presence of subsequent inter-monomer energy transfer on a picosecond time scale. The latter has been neglected by most authors in recent years by considering only sub-picosecond time scales or assuming that the inter-monomer coupling between low-energy states is too weak to warrant consideration of the entire trimer. However, Förster theory predicts that energy transfer of the order of picoseconds is possible even for very weak (less than 5 cm-1) electronic coupling between chromophores. This work reviews experimental data (with a focus on emission and hole-burned spectra) and simulations of exciton dynamics which demonstrate inter-monomer energy transfer. It is shown that the lowest energy 825 nm absorbance band cannot be properly described by a single excitonic state. The energy transfer through FMO is modelled by generalized Förster theory using a non-Markovian, reduced density matrix approach to describe the electronic structure. The disorder-averaged inter-monomer transfer time across the 825 nm band is about 27 ps. While only isolated FMO proteins are presented, the presence of inter-monomer energy transfer in the context of the overall photosystem is also briefly discussed.
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Affiliation(s)
- Adam Kell
- 1 Department of Chemistry, Kansas State University , Manhattan, KS , USA
| | | | - Tonu Reinot
- 1 Department of Chemistry, Kansas State University , Manhattan, KS , USA
| | - Ryszard Jankowiak
- 1 Department of Chemistry, Kansas State University , Manhattan, KS , USA.,2 Department of Physics, Kansas State University , Manhattan, KS , USA
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4
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Pieper J, Rätsep M, Golub M, Schmitt FJ, Artene P, Eckert HJ. Excitation energy transfer in phycobiliproteins of the cyanobacterium Acaryochloris marina investigated by spectral hole burning. PHOTOSYNTHESIS RESEARCH 2017; 133:225-234. [PMID: 28560566 DOI: 10.1007/s11120-017-0396-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 05/06/2017] [Indexed: 06/07/2023]
Abstract
The cyanobacterium Acaryochloris marina developed two types of antenna complexes, which contain chlorophyll-d (Chl d) and phycocyanobilin (PCB) as light-harvesting pigment molecules, respectively. The latter membrane-extrinsic complexes are denoted as phycobiliproteins (PBPs). Spectral hole burning was employed to study excitation energy transfer and electron-phonon coupling in PBPs. The data reveal a rich spectral substructure with a total of four low-energy electronic states whose absorption bands peak at 633, 644, 654, and at about 673 nm. The electronic states at ~633 and 644 nm can be tentatively attributed to phycocyanin (PC) and allophycocyanin (APC), respectively. The remaining low-energy electronic states including the terminal emitter at 673 nm may be associated with different isoforms of PC, APC, or the linker protein. Furthermore, the hole burning data reveal a large number of excited state vibrational frequencies, which are characteristic for the chromophore PCB. In summary, the results are in good agreement with the low-energy level structure of PBPs and electron-phonon coupling parameters reported by Gryliuk et al. (BBA 1837:1490-1499, 2014) based on difference fluorescence line-narrowing experiments.
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Affiliation(s)
- Jörg Pieper
- Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411, Tartu, Estonia.
| | - Margus Rätsep
- Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411, Tartu, Estonia
| | - Maksym Golub
- Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411, Tartu, Estonia
| | - Franz-Josef Schmitt
- Max-Volmer-Laboratories for Biophysical Chemistry, Technical University Berlin, Berlin, Germany
| | - Petrica Artene
- Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411, Tartu, Estonia
| | - Hann-Jörg Eckert
- Max-Volmer-Laboratories for Biophysical Chemistry, Technical University Berlin, Berlin, Germany
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Thyrhaug E, Žídek K, Dostál J, Bína D, Zigmantas D. Exciton Structure and Energy Transfer in the Fenna-Matthews-Olson Complex. J Phys Chem Lett 2016; 7:1653-1660. [PMID: 27082631 DOI: 10.1021/acs.jpclett.6b00534] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Fenna-Matthews-Olson (FMO) photosynthetic complex found in green sulfur bacteria has over the last decades been one of the favorite "model" systems for biological energy transfer. However, even after 40 years of studies, quantitative knowledge about its energy-transfer properties is limited. Here, two-dimensional electronic spectroscopy with full polarization control is used to provide an accurate description of the electronic structure and population dynamics in the complex. The sensitivity of the technique has further allowed us to spectroscopically identify the eighth bacterio-chlorophyll molecule recently discovered in the crystal structure. The time evolution of the spectral structure, covering time scales from tens of femtoseconds up to a nanosecond, reflects the energy flow in FMO and enables us to extract an unambiguous energy-transfer scheme.
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Affiliation(s)
- Erling Thyrhaug
- Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden
| | - Karel Žídek
- Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden
| | - Jakub Dostál
- Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg , Am Hubland, D-97074 Würzburg, Germany
| | - David Bína
- Biology Centre CAS, Branišovská 31, and Faculty of Science, University of South Bohemia , Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Donatas Zigmantas
- Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden
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Najafi M, Herascu N, Shafiei G, Picorel R, Zazubovich V. Conformational Changes in Pigment–Protein Complexes at Low Temperatures—Spectral Memory and a Possibility of Cooperative Effects. J Phys Chem B 2015; 119:6930-40. [PMID: 25985255 DOI: 10.1021/acs.jpcb.5b02845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mehdi Najafi
- Department
of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada
| | - Nicoleta Herascu
- Department
of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada
| | - Golia Shafiei
- Department
of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada
| | - Rafael Picorel
- Estacion Experimental de Aula Dei (CSIC), Avda. Montañana 1005, 50059 Zaragoza, Spain
| | - Valter Zazubovich
- Department
of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada
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Zazubovich V. Fluorescence Line Narrowing and Δ-FLN Spectra in the Presence of Excitation Energy Transfer between Weakly Coupled Chromophores. J Phys Chem B 2014; 118:13535-43. [DOI: 10.1021/jp509056z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Valter Zazubovich
- Department of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal H4B 1R6, Quebec, Canada
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8
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Kell A, Acharya K, Zazubovich V, Jankowiak R. On the Controversial Nature of the 825 nm Exciton Band in the FMO Protein Complex. J Phys Chem Lett 2014; 5:1450-1456. [PMID: 26269993 DOI: 10.1021/jz5001165] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The nature of the low-energy 825 nm band of the Fenna-Matthews-Olson (FMO) protein complex from Chlorobaculum tepidum at 5 K is discussed. It is shown, using hole-burning (HB) spectroscopy and excitonic calculations, that the 825 nm absorption band of the FMO trimer cannot be explained by a single electronic transition or overlap of electronic transitions of noninteracting pigments. To explain the shape of emission and nonresonant HB spectra, downward uncorrelated excitation energy transfer (EET) between trimer subunits should be taken into account. Modeling studies reveal the presence of three sub-bands within the 825 nm band, in agreement with nonresonant HB and emission spectra. We argue that after light induced coherences vanish, uncorrelated EET between the lowest exciton levels of each monomer takes place. HB induced spectral shifts provide a new insight on the energy landscape of the FMO protein.
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Affiliation(s)
| | | | - Valter Zazubovich
- §Department of Physics, Concordia University, Montreal H4B 1R6, Quebec, Canada
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9
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Excitation energy transfer and electron-vibrational coupling in phycobiliproteins of the cyanobacterium Acaryochloris marina investigated by site-selective spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1837:1490-9. [PMID: 24560813 DOI: 10.1016/j.bbabio.2014.02.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/26/2014] [Accepted: 02/12/2014] [Indexed: 10/25/2022]
Abstract
In adaption to its specific environmental conditions, the cyanobacterium Acaryochloris marina developed two different types of light-harvesting complexes: chlorophyll-d-containing membrane-intrinsic complexes and phycocyanobilin (PCB) - containing phycobiliprotein (PBP) complexes. The latter complexes are believed to form a rod-shaped structure comprising three homo-hexamers of phycocyanin (PC), one hetero-hexamer of phycocyanin and allophycocyanin (APC) and probably a linker protein connecting the PBPs to the reaction centre. Excitation energy transfer and electron-vibrational coupling in PBPs have been investigated by selectively excited fluorescence spectra. The data reveal a rich spectral substructure with a total of five low-energy electronic states with fluorescence bands at 635nm, 645nm, 654nm, 659nm and a terminal emitter at about 673 nm. The electronic states at ~635 and 645 nm are tentatively attributed to PC and APC, respectively, while an apparent heterogeneity among PC subunits may also play a role. The other fluorescence bands may be associated with three different isoforms of the linker protein. Furthermore, a large number of vibrational features can be identified for each electronic state with intense phonon sidebands peaking at about 31 to 37cm⁻¹, which are among the highest phonon frequencies observed for photosynthetic antenna complexes. The corresponding Huang-Rhys factors S fall in the range between 0.98 (terminal emitter), 1.15 (APC), and 1.42 (PC). Two characteristic vibronic lines at about 1580 and 1634cm⁻¹ appear to reflect CNH⁺ and CC stretching modes of the PCB chromophore, respectively. The exact phonon and vibrational frequencies vary with electronic state implying that the respective PCB chromophores are bound to different protein environments. This article is part of a special issue entitled: photosynthesis research for sustainability: keys to produce clean energy.
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10
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Herascu N, Kell A, Acharya K, Jankowiak R, Blankenship RE, Zazubovich V. Modeling of Various Optical Spectra in the Presence of Slow Excitation Energy Transfer in Dimers and Trimers with Weak Interpigment Coupling: FMO as an Example. J Phys Chem B 2014; 118:2032-40. [DOI: 10.1021/jp410586f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Nicoleta Herascu
- Department
of Physics, Concordia University, Montreal, H4B 1R6 Quebec, Canada
| | | | | | | | | | - Valter Zazubovich
- Department
of Physics, Concordia University, Montreal, H4B 1R6 Quebec, Canada
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11
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Linnanto JM, Korppi-Tommola JEI. Excitation Energy-Transfer in the LH2 Antenna of Photosynthetic Purple Bacteria via Excitonic B800 and B850 States. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200000089] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Caycedo-Soler F, Chin AW, Almeida J, Huelga SF, Plenio MB. The nature of the low energy band of the Fenna-Matthews-Olson complex: Vibronic signatures. J Chem Phys 2012; 136:155102. [DOI: 10.1063/1.3703504] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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13
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Herascu N, Ahmouda S, Picorel R, Seibert M, Jankowiak R, Zazubovich V. Effects of the Distributions of Energy or Charge Transfer Rates on Spectral Hole Burning in Pigment–Protein Complexes at Low Temperatures. J Phys Chem B 2011; 115:15098-109. [DOI: 10.1021/jp208142k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicoleta Herascu
- Department of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6 Canada
| | - Somaya Ahmouda
- Department of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6 Canada
| | - Rafael Picorel
- Estacion Experimental Aula Dei (CSIC), Avda. Montañana, 50059 Zaragoza, Spain
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Michael Seibert
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Ryszard Jankowiak
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Valter Zazubovich
- Department of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6 Canada
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14
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Pieper J, Rätsep M, Trostmann I, Schmitt FJ, Theiss C, Paulsen H, Eichler H, Freiberg A, Renger G. Excitonic Energy Level Structure and Pigment−Protein Interactions in the Recombinant Water-Soluble Chlorophyll Protein. II. Spectral Hole-Burning Experiments. J Phys Chem B 2011; 115:4053-65. [DOI: 10.1021/jp111457t] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Pieper
- Max-Volmer-Laboratories for
Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany
| | - M. Rätsep
- Institute of Physics, University of Tartu, Tartu, Estonia
| | - I. Trostmann
- Institute of General Botany, Johannes Gutenberg University Mainz, Germany
| | - F.-J. Schmitt
- Max-Volmer-Laboratories for
Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany
- Institute of Optics and Atomic
Physics, Berlin Institute of Technology, Germany
| | - C. Theiss
- Institute of Optics and Atomic
Physics, Berlin Institute of Technology, Germany
| | - H. Paulsen
- Institute of General Botany, Johannes Gutenberg University Mainz, Germany
| | - H.J. Eichler
- Institute of Optics and Atomic
Physics, Berlin Institute of Technology, Germany
| | - A. Freiberg
- Institute of Physics, University of Tartu, Tartu, Estonia
- Institute of Molecular and Cell
Biology, University of Tartu, Tartu, Estonia
| | - G. Renger
- Max-Volmer-Laboratories for
Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany
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15
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Milder MTW, Brüggemann B, van Grondelle R, Herek JL. Revisiting the optical properties of the FMO protein. PHOTOSYNTHESIS RESEARCH 2010; 104:257-274. [PMID: 20229036 PMCID: PMC2882565 DOI: 10.1007/s11120-010-9540-1] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 02/24/2010] [Indexed: 05/28/2023]
Abstract
We review the optical properties of the FMO complex as found by spectroscopic studies of the Q ( y ) band over the last two decades. This article emphasizes the different methods used, both experimental and theoretical, to elucidate the excitonic structure and dynamics of this pigment-protein complex.
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Affiliation(s)
| | - Ben Brüggemann
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin, Germany
| | - Rienk van Grondelle
- Department of Physics & Astronomy, Vrije Universiteit Amsterdam, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Jennifer L. Herek
- Optical Sciences Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands
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16
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Baier J, Gabrielsen M, Oellerich S, Michel H, van Heel M, Cogdell RJ, Köhler J. Spectral diffusion and electron-phonon coupling of the B800 BChl a molecules in LH2 complexes from three different species of purple bacteria. Biophys J 2010; 97:2604-12. [PMID: 19883604 DOI: 10.1016/j.bpj.2009.07.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2009] [Revised: 07/06/2009] [Accepted: 07/14/2009] [Indexed: 10/20/2022] Open
Abstract
We have investigated the spectral diffusion and the electron-phonon coupling of B800 bacteriochlorophyll a molecules in the peripheral light-harvesting complex LH2 for three different species of purple bacteria, Rhodobacter sphaeroides, Rhodospirillum molischianum, and Rhodopseudomonas acidophila. We come to the conclusion that B800 binding pockets for Rhodobacter sphaeroides and Rhodopseudomonas acidophila are rather similar with respect to the polarity of the protein environment but that the packaging of the alphabeta-polypeptides seems to be less tight in Rb. sphaeroides with respect to the other two species.
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Affiliation(s)
- J Baier
- Experimental Physics IV and Research Centre for Bio-Macromolecules, University of Bayreuth, Bayreuth, Germany
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17
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Pieper J, Irrgang KD, Rätsep M, Voigt J, Renger G, Small GJ. Assignment of the Lowest QY-state and Spectral Dynamics of the CP29 Chlorophyll a/b Antenna Complex of Green Plants: A Hole-burning Study ‡. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2000)0710574aotlqy2.0.co2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Rätsep M, Freiberg A. Unusual temperature quenching of bacteriochlorophyll a fluorescence in FMO antenna protein trimers. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2006.12.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Hughes JL, Krausz E, Smith PJ, Pace RJ, Riesen H. Probing the lowest energy chlorophyll a states of photosystem II via selective spectroscopy: new insights on P680. PHOTOSYNTHESIS RESEARCH 2005; 84:93-8. [PMID: 16049760 DOI: 10.1007/s11120-004-7927-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2004] [Accepted: 12/21/2004] [Indexed: 05/03/2023]
Abstract
We present the wavelength dependence of homogeneous holewidths of persistent spectral holes burnt in O2-evolving Photosystem II core complexes isolated from spinach, in the temperature range 2.5-8 K. The data supports the assignment that those chlorophylls which undergo persistent spectral hole-burning are specific CP43 and CP47-trap states that transfer their excitation energy to the reaction center. The lifetime-limited holewidths show that when PS II is in the S1(QA -) (closed) state, the CP43/CP47-trap states have excited-state lifetimes in the range from 70 to 270 ps. These lifetimes correspond to excitation transfer rates to the reaction center, and are far slower than required for models in which the PS II reaction center (P680) acts as a 'shallow-trap' for excitations. For wavelengths at which both traps absorb, the hole shape is clearly a composite of two Lorentzians, corresponding to hole-burning in both states simultaneously. The temperature dependence of the homogeneous holewidth does not follow the usual T1.3 dependence found in many chlorophyll-protein systems. Our data indicates T 2 temperature dependence, typically found in crystalline systems where the chromophore is coupled to localized phonon modes.
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Affiliation(s)
- Joseph L Hughes
- Research School of Chemistry, Australian National University, Building 35, Science Road, Canberra, ACT 0200, Australia.
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20
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Brüggemann B, May V. Ultrafast Laser Pulse Control of Exciton Dynamics: A Computational Study on the FMO Complex†. J Phys Chem B 2004. [DOI: 10.1021/jp040096+] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Hughes JL, Prince BJ, Krausz E, Smith PJ, Pace RJ, Riesen H. Highly Efficient Spectral Hole-Burning in Oxygen-Evolving Photosystem II Preparations. J Phys Chem B 2004. [DOI: 10.1021/jp0492523] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph L. Hughes
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Barry J. Prince
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Elmars Krausz
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Paul J. Smith
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Ron J. Pace
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Hans Riesen
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
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22
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Hughes JL, Prince BJ, Peterson Årsköld S, Smith PJ, Pace RJ, Riesen H, Krausz E. The Native Reaction Centre of Photosystem II: A New Paradigm for P680. Aust J Chem 2004. [DOI: 10.1071/ch04140] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Low-temperature spectra of fully active (oxygen-evolving) Photosystem II (PSII) cores prepared from spinach exhibit well developed structure. Spectra of isolated sub-fragments of PSII cores establish that the native reaction centre is better structured and red-shifted compared to the isolated reaction centre. Laser illumination of PSII cores leads to efficient and deep spectral hole-burning. Measurements of homogeneous hole-widths establish excited-state lifetimes in the 40–300 ps range. The high hole-burning efficiency is attributed to charge separation of P680 in native PSII that follows reaction-centre excitation via ‘slow transfer’ states in the inner light-harvesting assemblies CP43 and CP47. The ‘slow transfer’ state in CP47 and that in CP43 can be distinguished in the hole-burning action spectrum and high-resolution hole-burning spectra. An important observation is that 685–700 nm illumination gives rise to efficient P680 charge separation, as established by QA− formation. This leads to a new paradigm for P680. The charge-separating state has surprisingly weak absorption and extends to 700 nm.
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23
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Blankenship RE, Matsuura K. Antenna Complexes from Green Photosynthetic Bacteria. LIGHT-HARVESTING ANTENNAS IN PHOTOSYNTHESIS 2003. [DOI: 10.1007/978-94-017-2087-8_6] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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24
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Reinot T, Zazubovich V, Hayes JM, Small GJ. New Insights on Persistent Nonphotochemical Hole Burning and Its Application to Photosynthetic Complexes. J Phys Chem B 2001. [DOI: 10.1021/jp010126y] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tonu Reinot
- Department of Chemistry and Ames Laboratory-U.S. Department of Energy, Iowa State University, Ames, Iowa 50011
| | - Valter Zazubovich
- Department of Chemistry and Ames Laboratory-U.S. Department of Energy, Iowa State University, Ames, Iowa 50011
| | - John M. Hayes
- Department of Chemistry and Ames Laboratory-U.S. Department of Energy, Iowa State University, Ames, Iowa 50011
| | - Gerald J. Small
- Department of Chemistry and Ames Laboratory-U.S. Department of Energy, Iowa State University, Ames, Iowa 50011
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25
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Reinot T, Small GJ. Modeling of dispersive nonphotochemical hole growth kinetics data: Al-phthalocyanine tetrasulphonate in hyperquenched glassy water. J Chem Phys 2000. [DOI: 10.1063/1.1323228] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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26
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Jankowiak R, Zazubovich V, Rätsep M, Matsuzaki S, Alfonso M, Picorel R, Seibert M, Small GJ. The CP43 Core Antenna Complex of Photosystem II Possesses Two Quasi-Degenerate and Weakly Coupled Qy-Trap States. J Phys Chem B 2000. [DOI: 10.1021/jp0025431] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Jankowiak
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - V. Zazubovich
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - M. Rätsep
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - S. Matsuzaki
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - M. Alfonso
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - R. Picorel
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - M. Seibert
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - G. J. Small
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
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27
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Matsuzaki S, Zazubovich V, Rätsep M, Hayes JM, Small GJ. Energy Transfer Kinetics and Low Energy Vibrational Structure of the Three Lowest Energy Qy-States of the Fenna−Matthews−Olson Antenna Complex. J Phys Chem B 2000. [DOI: 10.1021/jp0018495] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Matsuzaki
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - V. Zazubovich
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - M. Rätsep
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - J. M. Hayes
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - G. J. Small
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
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28
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Wendling M, Pullerits T, Przyjalgowski MA, Vulto SIE, Aartsma TJ, van Grondelle R, van Amerongen H. Electron−Vibrational Coupling in the Fenna−Matthews−Olson Complex ofProsthecochlorisaestuariiDetermined by Temperature-Dependent Absorption and Fluorescence Line-Narrowing Measurements. J Phys Chem B 2000. [DOI: 10.1021/jp000077+] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Hayes JM, Matsuzaki S, Rätsep M, Small GJ. Red Chlorophyll a Antenna States of Photosystem I of the Cyanobacterium Synechocystis sp. PCC 6803. J Phys Chem B 2000. [DOI: 10.1021/jp000447u] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. M. Hayes
- Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - S. Matsuzaki
- Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - M. Rätsep
- Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - G. J. Small
- Ames LaboratoryU.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011
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30
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Chernyak V, Minami T, Mukamel S. Exciton transport in molecular aggregates probed by time and frequency gated optical spectroscopy. J Chem Phys 2000. [DOI: 10.1063/1.481396] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Pieper J, Irrgang KD, Rätsep M, Voigt J, Renger G, Small GJ. Assignment of the lowest Qy-state and spectral dynamics of the CP29 chlorophyll a/b antenna complex of green plants: a hole-burning study. Photochem Photobiol 2000; 71:574-81. [PMID: 10818788 DOI: 10.1562/0031-8655(2000)071<0574:aotlqy>2.0.co;2] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Low-temperature absorption, fluorescence and persistent non-photochemical hole-burned spectra are reported for the CP29 chlorophyll (Chl) a/b antenna complex of photosystem II of green plants. The absorption-origin band of the lowest Qy-state lies at 678.2 nm and carries a width of approximately 130 cm-1 that is dominated by inhomogeneous broadening at low temperatures. Its absorption intensity is equivalent to that of one of the six Chl a molecules of CP29. The absence of a significant satellite hole structure produced by hole burning, within the absorption band of the lowest state, indicates that the associated Chl a molecule is weakly coupled to the other Chl and, therefore, that the lowest-energy state is highly localized on a single Chl a molecule. The electron-phonon coupling of the 678.2 nm state is weak with a Huang-Rhys factor S of 0.5 and a peak phonon frequency (omega m) of approximately 20 cm-1. These values give a Stokes shift (2S omega m) in good agreement with the measured positions of the absorption band at 678.2 nm and a fluorescence-origin band at 679.1 nm. Zero-phonon holes associated with the lowest state have a width of approximately 0.05 cm-1 at 4.2 K, corresponding to a total effective dephasing time of approximately 400 ps. The temperature dependence of the zero-phonon holewidth indicates that this time constant is dominated at temperatures below 8 K by pure dephasing/spectral diffusion due to coupling of the optical transition to the glass-like two-level systems of the protein. Zero-phonon hole-widths obtained for the Chl b bands at 638.5 and 650.0 nm, at 4.2 K, lead to lower limits of 900 +/- 150 fs and 4.2 +/- 0.3 ps, respectively, for the Chl b-->Chl a energy-transfer times. Downward energy transfer from the Chl a state(s) at 665.0 nm occurs in 5.3 +/- 0.6 ps at 4.2 K.
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Affiliation(s)
- J Pieper
- Institute of Physics, Humboldt University, Berlin, Germany
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