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Chestnut MM, Milikisiyants S, Chatterjee R, Kern J, Smirnov AI. Electronic Structure of the Primary Electron Donor P700+• in Photosystem I Studied by Multifrequency HYSCORE Spectroscopy at X- and Q-Band. J Phys Chem B 2021; 125:36-48. [PMID: 33356277 DOI: 10.1021/acs.jpcb.0c09000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The primary electron donor P700 of the photosystem I (PSI) is a heterodimer consisting of two chlorophyll molecules. A series of electron-transfer events immediately following the initial light excitation leads to a stabilization of the positive charge by its cation radical form, P700+•. The electronic structure of P700+• and, in particular, its asymmetry with respect to the two chlorophyll monomers is of fundamental interest and is not fully understood up to this date. Here, we apply multifrequency X- (9 GHz) and Q-band (35 GHz) hyperfine sublevel correlation (HYSCORE) spectroscopy to investigate the electron spin density distribution in the cation radical P700+• of PSI from a thermophilic cyanobacterium Thermosynechococcus elongatus. Six 14N and two 1H distinct nuclei have been resolved in the HYSCORE spectra and parameters of the corresponding nuclear hyperfine and quadrupolar hyperfine interactions were obtained by combining the analysis of HYSCORE spectral features with direct numerical simulations. Based on a close similarity of the nuclear quadrupole tensor parameters, all of the resolved 14N nuclei were assigned to six out of total eight available pyrrole ring nitrogen atoms (i.e., four in each of the chlorophylls), providing direct evidence of spin density delocalization over the both monomers in the heterodimer. Using the obtained experimental values of the 14N electron-nuclear hyperfine interaction parameters, the upper limit of the electron spin density asymmetry parameter is estimated as RA/Bupper = 7.7 ± 0.5, while a tentative assignment of 14N observed in the HYSCORE spectra yields RB/A = 3.1 ± 0.5.
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Affiliation(s)
- Melanie M Chestnut
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, United States
| | - Sergey Milikisiyants
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, United States
| | - Ruchira Chatterjee
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jan Kern
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Alex I Smirnov
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, United States
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2
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Ptushenko VV, Solovchenko AE, Bychkov AY, Chivkunova OB, Golovin AV, Gorelova OA, Ismagulova TT, Kulik LV, Lobakova ES, Lukyanov AA, Samoilova RI, Scherbakov PN, Selyakh IO, Semenova LR, Vasilieva SG, Baulina OI, Skulachev MV, Kirpichnikov MP. Cationic penetrating antioxidants switch off Mn cluster of photosystem II in situ. PHOTOSYNTHESIS RESEARCH 2019; 142:229-240. [PMID: 31302832 DOI: 10.1007/s11120-019-00657-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 06/27/2019] [Indexed: 06/10/2023]
Abstract
Mitochondria-targeted antioxidants (also known as 'Skulachev Ions' electrophoretically accumulated by mitochondria) exert anti-ageing and ROS-protecting effects well documented in animal and human cells. However, their effects on chloroplast in photosynthetic cells and corresponding mechanisms are scarcely known. For the first time, we describe a dramatic quenching effect of (10-(6-plastoquinonyl)decyl triphenylphosphonium (SkQ1) on chlorophyll fluorescence, apparently mediated by redox interaction of SkQ1 with Mn cluster in Photosystem II (PSII) of chlorophyte microalga Chlorella vulgaris and disabling the oxygen-evolving complex (OEC). Microalgal cells displayed a vigorous uptake of SkQ1 which internal concentration built up to a very high level. Using optical and EPR spectroscopy, as well as electron donors and in silico molecular simulation techniques, we found that SkQ1 molecule can interact with Mn atoms of the OEC in PSII. This stops water splitting giving rise to potent quencher(s), e.g. oxidized reaction centre of PSII. Other components of the photosynthetic apparatus proved to be mostly intact. This effect of the Skulachev ions might help to develop in vivo models of photosynthetic cells with impaired OEC function but essentially intact otherwise. The observed phenomenon suggests that SkQ1 can be applied to study stress-induced damages to OEC in photosynthetic organisms.
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Affiliation(s)
- Vasily V Ptushenko
- A.N. Belozersky Institute of Physical-Chemical Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234.
- N.M. Emanuel Institute of Biochemical Physics of RAS, Moscow, Russia, 119334.
| | - Alexei E Solovchenko
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
- Peoples Friendship University of Russia (RUDN University), Moscow, Russia, 117198
| | - Andrew Y Bychkov
- Faculty of Geology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Olga B Chivkunova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Andrey V Golovin
- Faculty of Bioengineering and Bioinformatics, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia, 119991
| | - Olga A Gorelova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Tatiana T Ismagulova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Leonid V Kulik
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion of SB RAS, Novosibirsk, Russia, 630090
- Novosibirsk State University, Pirogova Street 2, Novosibirsk, Russia, 630090
| | - Elena S Lobakova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Alexandr A Lukyanov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Rima I Samoilova
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion of SB RAS, Novosibirsk, Russia, 630090
| | - Pavel N Scherbakov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Irina O Selyakh
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Larisa R Semenova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Svetlana G Vasilieva
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Olga I Baulina
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Maxim V Skulachev
- A.N. Belozersky Institute of Physical-Chemical Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
- Institute of Mitoengineering, M.V. Lomonosov Moscow State University, Moscow, Russia, 119234
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3
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Ishara Silva K, Jagannathan B, Golbeck JH, Lakshmi KV. Elucidating the design principles of photosynthetic electron-transfer proteins by site-directed spin labeling EPR spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1857:548-556. [PMID: 26334844 DOI: 10.1016/j.bbabio.2015.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 08/20/2015] [Indexed: 10/23/2022]
Abstract
Site-directed spin labeling electron paramagnetic resonance (SDSL EPR) spectroscopy is a powerful tool to determine solvent accessibility, side-chain dynamics, and inter-spin distances at specific sites in biological macromolecules. This information provides important insights into the structure and dynamics of both natural and designed proteins and protein complexes. Here, we discuss the application of SDSL EPR spectroscopy in probing the charge-transfer cofactors in photosynthetic reaction centers (RC) such as photosystem I (PSI) and the bacterial reaction center (bRC). Photosynthetic RCs are large multi-subunit proteins (molecular weight≥300 kDa) that perform light-driven charge transfer reactions in photosynthesis. These reactions are carried out by cofactors that are paramagnetic in one of their oxidation states. This renders the RCs unsuitable for conventional nuclear magnetic resonance spectroscopy investigations. However, the presence of native paramagnetic centers and the ability to covalently attach site-directed spin labels in RCs makes them ideally suited for the application of SDSL EPR spectroscopy. The paramagnetic centers serve as probes of conformational changes, dynamics of subunit assembly, and the relative motion of cofactors and peptide subunits. In this review, we describe novel applications of SDSL EPR spectroscopy for elucidating the effects of local structure and dynamics on the electron-transfer cofactors of photosynthetic RCs. Because SDSL EPR Spectroscopy is uniquely suited to provide dynamic information on protein motion, it is a particularly useful method in the engineering and analysis of designed electron transfer proteins and protein networks. This article is part of a Special Issue entitled Biodesign for Bioenergetics--the design and engineering of electronic transfer cofactors, proteins and protein networks, edited by Ronald L. Koder and J.L. Ross Anderson.
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Affiliation(s)
- K Ishara Silva
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, NY 12180; The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Bharat Jagannathan
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802; Department of Chemistry, The Pennsylvania State University, University Park, PA 16802
| | - John H Golbeck
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802; Department of Chemistry, The Pennsylvania State University, University Park, PA 16802.
| | - K V Lakshmi
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, NY 12180; The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, NY 12180.
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4
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Savitsky A, Niklas J, Golbeck JH, Möbius K, Lubitz W. Orientation Resolving Dipolar High-Field EPR Spectroscopy on Disordered Solids: II. Structure of Spin-Correlated Radical Pairs in Photosystem I. J Phys Chem B 2013; 117:11184-99. [DOI: 10.1021/jp401573z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- A. Savitsky
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470
Mülheim an der Ruhr, Germany
| | - J. Niklas
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470
Mülheim an der Ruhr, Germany
| | - J. H. Golbeck
- Department of Biochemistry
and
Molecular Biology, Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802,
United States
| | - K. Möbius
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470
Mülheim an der Ruhr, Germany
- Department of Physics, Free University Berlin, Arnimallee 14, D-14195 Berlin,
Germany
| | - W. Lubitz
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470
Mülheim an der Ruhr, Germany
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Filek M, Kościelniak J, Łabanowska M, Bednarska E, Bidzińska E. Selenium-induced protection of photosynthesis activity in rape (Brassica napus) seedlings subjected to cadmium stress. Fluorescence and EPR measurements. PHOTOSYNTHESIS RESEARCH 2010; 105:27-37. [PMID: 20407830 DOI: 10.1007/s11120-010-9551-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 04/02/2010] [Indexed: 05/03/2023]
Abstract
Fluorescence and electron paramagnetic resonance measurements were used to study selenium influence on photosystem activity in rape seedlings affected by Cd stress. Water cultures containing Hoagland nutrients were supplemented with 400 microM of CdCl(2), 2 microM of Na(2)SeO(4) and a mixture of both CdCl(2) and Na(2)SeO(4). The seedlings were cultured till the first leaf reached about 1 cm in length. Cadmium-induced changes in the activity of both photosystems were partly diminished by Se presence in the nutrient medium. Electron microscopy photographs confirmed less degradation in chloroplasts of plants cultured on media containing Se. It is suggested that sucrose groups of starch, which is deposited in greater amounts in Cd-stressed plants, may act as traps for free radicals produced under those conditions.
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Affiliation(s)
- Maria Filek
- Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland.
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6
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Zech SG, Lubitz W, Bittl R. Pulsed EPR experiments on radical pairs in photosynthesis: Comparison of the donor-acceptor distances in photosystem I and bacterial reaction centers. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19961001220] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Miyamoto R, Mino H, Kondo T, Itoh S, Oh-oka H. An Electron Spin-Polarized Signal of the P800+A1(Q)− State in the Homodimeric Reaction Center Core Complex of Heliobacterium modesticaldum. Biochemistry 2008; 47:4386-93. [DOI: 10.1021/bi701612v] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryo Miyamoto
- Division of Material Science (Physics), Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya 464-8602, Japan, and Department of Biological Sciences, Graduate School of Science, Osaka University, Osaka 560-0043, Japan
| | - Hiroyuki Mino
- Division of Material Science (Physics), Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya 464-8602, Japan, and Department of Biological Sciences, Graduate School of Science, Osaka University, Osaka 560-0043, Japan
| | - Toru Kondo
- Division of Material Science (Physics), Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya 464-8602, Japan, and Department of Biological Sciences, Graduate School of Science, Osaka University, Osaka 560-0043, Japan
| | - Shigeru Itoh
- Division of Material Science (Physics), Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya 464-8602, Japan, and Department of Biological Sciences, Graduate School of Science, Osaka University, Osaka 560-0043, Japan
| | - Hirozo Oh-oka
- Division of Material Science (Physics), Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya 464-8602, Japan, and Department of Biological Sciences, Graduate School of Science, Osaka University, Osaka 560-0043, Japan
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8
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Pushkar YN, Karyagina I, Stehlik D, Brown S, van der Est A. Recruitment of a Foreign Quinone into the A1 Site of Photosystem I. J Biol Chem 2005; 280:12382-90. [PMID: 15640524 DOI: 10.1074/jbc.m412940200] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In photosystem I (PS I), phylloquinone (PhQ) acts as a low potential electron acceptor during light-induced electron transfer (ET). The origin of the very low midpoint potential of the quinone is investigated by introducing anthraquinone (AQ) into PS I in the presence and absence of the iron-sulfur clusters. Solvent extraction and reincubation is used to obtain PS I particles containing AQ and the iron-sulfur clusters, whereas incubation of the menB rubA double mutant yields PS I with AQ in the PhQ site but no iron-sulfur clusters. Transient electron paramagnetic resonance spectroscopy is used to investigate the orientation of AQ in the binding site and the ET kinetics. The low temperature spectra suggest that the orientation of AQ in all samples is the same as that of PhQ in native PS I. In PS I containing the iron sulfur clusters, (i) the rate of forward electron transfer from the AQ*- to F(X) is found to be faster than from PhQ*- to F(X), and (ii) the spin polarization patterns provide indirect evidence that the preceding ET step from A0*- to quinone is slower than in the native system. The changes in the kinetics are in accordance with the more negative reduction midpoint potential of AQ. Moreover, a comparison of the spectra in the presence and absence of the iron-sulfur clusters suggests that the midpoint potential of AQ is more negative in the presence of F(X). The electron transfer from the AQ- to F(X) is found to be thermally activated with a lower apparent activation energy than for PhQ in native PS I. The spin polarization patterns show that the triplet character in the initial state of P700)*+AQ*- increases with temperature. This behavior is rationalized in terms of a model involving a distribution of lifetimes/redox potentials for A0 and related competition between charge recombination and forward electron transfer from the radical pair P700*+A0*-.
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Affiliation(s)
- Yulia N Pushkar
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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Konovalova TA, Kispert LD, van Tol J, Brunel LC. Multifrequency High-Field Electron Paramagnetic Resonance Characterization of the Peroxyl Radical Location in Horse Heart Myoglobin Oxidized by H2O2. J Phys Chem B 2004. [DOI: 10.1021/jp0313425] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tatyana A. Konovalova
- Department of Chemistry, Box 870336, University of Alabama, Tuscaloosa, Alabama 35487, and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310
| | - Lowell D. Kispert
- Department of Chemistry, Box 870336, University of Alabama, Tuscaloosa, Alabama 35487, and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310
| | - Johan van Tol
- Department of Chemistry, Box 870336, University of Alabama, Tuscaloosa, Alabama 35487, and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310
| | - Louis-Claude Brunel
- Department of Chemistry, Box 870336, University of Alabama, Tuscaloosa, Alabama 35487, and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310
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10
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11
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Zeng R, Budil DE. A re-examination of spin–orbit coupling in the triplet state of the primary donor in photosynthetic reaction centers. Chem Phys 2003. [DOI: 10.1016/s0301-0104(03)00286-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Zeng R, van Tol J, Deal A, Frank HA, Budil DE. Temperature Dependence of the Primary Donor Triplet State g-Tensor in Photosynthetic Reaction Centers of Rhodobacter sphaeroides R-26 Observed by Transient 240 GHz Electron Paramagnetic Resonance. J Phys Chem B 2003. [DOI: 10.1021/jp026545s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ronghui Zeng
- Department of Chemistry and Chemical Biology, Northeastern University, Boston Massachusetts 02115, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, Florida State University, Tallahassee, Florida 32310, and Department of Chemistry, U-3060, University of Connecticut, Storrs, Connecticut 06269
| | - Johan van Tol
- Department of Chemistry and Chemical Biology, Northeastern University, Boston Massachusetts 02115, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, Florida State University, Tallahassee, Florida 32310, and Department of Chemistry, U-3060, University of Connecticut, Storrs, Connecticut 06269
| | - Amanda Deal
- Department of Chemistry and Chemical Biology, Northeastern University, Boston Massachusetts 02115, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, Florida State University, Tallahassee, Florida 32310, and Department of Chemistry, U-3060, University of Connecticut, Storrs, Connecticut 06269
| | - Harry A. Frank
- Department of Chemistry and Chemical Biology, Northeastern University, Boston Massachusetts 02115, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, Florida State University, Tallahassee, Florida 32310, and Department of Chemistry, U-3060, University of Connecticut, Storrs, Connecticut 06269
| | - David E. Budil
- Department of Chemistry and Chemical Biology, Northeastern University, Boston Massachusetts 02115, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, Florida State University, Tallahassee, Florida 32310, and Department of Chemistry, U-3060, University of Connecticut, Storrs, Connecticut 06269
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Poluektov OG, Utschig LM, Schlesselman SL, Lakshmi KV, Brudvig GW, Kothe G, Thurnauer MC. Electronic Structure of the P700Special Pair from High-Frequency Electron Paramagnetic Resonance Spectroscopy. J Phys Chem B 2002. [DOI: 10.1021/jp021465+] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Webber AN, Lubitz W. P700: the primary electron donor of photosystem I. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1507:61-79. [PMID: 11687208 DOI: 10.1016/s0005-2728(01)00198-0] [Citation(s) in RCA: 211] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The primary electron donor of photosystem I, P700, is a chlorophyll species that in its excited state has a potential of approximately -1.2 V. The precise chemical composition and electronic structure of P700 is still unknown. Recent evidence indicates that P700 is a dimer of one chlorophyll (Chl) a and one Chl a'. The Chl a' and Chl a are axially coordinated by His residues provided by protein subunits PsaA and PsaB, respectively. The Chl a', but not the Chl a, is also H-bonded to the protein. The H-bonding is likely responsible for selective insertion of Chl a' into the reaction center. EPR studies of P700(+*) in frozen solution and single crystals indicate a large asymmetry in the electron spin and charge distribution towards one Chl of the dimer. Molecular orbital calculations indicate that H-bonding will specifically stabilize the Chl a'-side of the dimer, suggesting that the unpaired electron would predominantly reside on the Chl a. This is supported by results of specific mutagenesis of the PsaA and PsaB axial His residues, which show that only mutations of the PsaB subunit significantly alter the hyperfine coupling constants associated with a single Chl molecule. The PsaB mutants also alter the microwave induced triplet-minus-singlet spectrum indicating that the triplet state is localized on the same Chl. Excitonic coupling between the two Chl a of P700 is weak due to the distance and overlap of the porphyrin planes. Evidence of excitonic coupling is found in PsaB mutants which show a new bleaching band at 665 nm that likely represents an increased intensity of the upper exciton band of P700. Additional properties of P700 that may give rise to its unusually low potential are discussed.
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Affiliation(s)
- A N Webber
- Department of Plant Biology and Center for the Study of Early Events in Photosynthesis, Arizona State University, Tempe 85287-1601, USA.
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15
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Abstract
Pulsed electron paramagnetic resonance (EPR) methods such as ESEEM, PELDOR, relaxation time measurements, transient EPR, high-field/high-frequency EPR, and pulsed ENDOR, have been used successfully to investigate the local structure and dynamics of paramagnetic centers in biological samples. These methods allow different contributions to the EPR spectra to be distinguished and can help unravel complicated EPR spectra consisting of overlapping resonance lines, as are often found in disordered protein samples. The basic principles, specific potentials, technical requirements, and limitations of these advanced EPR techniques will be reviewed together with recent applications to metal centers, organic radicals, and spin labels in proteins.
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Affiliation(s)
- T Prisner
- Institute for Physical and Theoretical Chemistry, J. W. Goethe-University Frankfurt, Marie-Curie-Strasse 11, Frankfurt am Main, D-60439 Germany.
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16
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Käss H, Fromme P, Witt HT, Lubitz W. Orientation and Electronic Structure of the Primary Donor Radical Cation in Photosystem I: A Single Crystals EPR and ENDOR Study. J Phys Chem B 2001. [DOI: 10.1021/jp0032311] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hanno Käss
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Str. d. 17. Juni 135, D-10623 Berlin, Germany
| | - Petra Fromme
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Str. d. 17. Juni 135, D-10623 Berlin, Germany
| | - Horst T. Witt
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Str. d. 17. Juni 135, D-10623 Berlin, Germany
| | - Wolfgang Lubitz
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Str. d. 17. Juni 135, D-10623 Berlin, Germany
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Lakshmi KV, Reifler MJ, Brudvig GW, Poluektov OG, Wagner AM, Thurnauer MC. High-Field EPR Study of Carotenoid and Chlorophyll Cation Radicals in Photosystem II. J Phys Chem B 2000. [DOI: 10.1021/jp002558z] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. V. Lakshmi
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
| | - Michael J. Reifler
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
| | - Gary W. Brudvig
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
| | - Oleg G. Poluektov
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
| | - Arlene M. Wagner
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
| | - Marion C. Thurnauer
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
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18
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Zech SG, Hofbauer W, Kamlowski A, Fromme P, Stehlik D, Lubitz W, Bittl R. A Structural Model for the Charge Separated State in Photosystem I from the Orientation of the Magnetic Interaction Tensors. J Phys Chem B 2000. [DOI: 10.1021/jp002125w] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephan G. Zech
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Wulf Hofbauer
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Andreas Kamlowski
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Petra Fromme
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Dietmar Stehlik
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Wolfgang Lubitz
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Robert Bittl
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17, Juni 135, 10623 Berlin, Germany, and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
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19
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Bratt PJ, Poluektov OG, Thurnauer MC, Krzystek J, Brunel LC, Schrier J, Hsiao YW, Zerner M, Angerhofer A. The g-Factor Anisotropy of Plant Chlorophyll a•+. J Phys Chem B 2000. [DOI: 10.1021/jp001126l] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter J. Bratt
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Oleg G. Poluektov
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Marion C. Thurnauer
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - J. Krzystek
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Louis-Claude Brunel
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Joshua Schrier
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Ya-Wen Hsiao
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Michael Zerner
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
| | - Alexander Angerhofer
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, Department of Chemistry, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, New Jersey 07306, and Quantum Theory Project, University of
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20
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Bratt PJ, Ringus E, Hassan A, Tol HV, Maniero AL, Brunel LC, Rohrer M, Bubenzer-Hange C, Scheer H, Angerhofer A. EPR on Biological Samples beyond the Limits of Superconducting MagnetsThe Primary Donor Cation of Purple Bacterial Photosynthesis. J Phys Chem B 1999. [DOI: 10.1021/jp992885a] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter J. Bratt
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Erin Ringus
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Alia Hassan
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Hans Van Tol
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Anna-Lisa Maniero
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Louis-Claude Brunel
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Martin Rohrer
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Claudia Bubenzer-Hange
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Hugo Scheer
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
| | - Alexander Angerhofer
- Department of Chemistry, University of Florida, Box 117200, Gainesville, Florida 32611, Department of Science, Columbia College, Box 481, Columbia, South Carolina 29203, National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 E. Paul Dirac Drive, Tallahassee, Florida 32310, Dipartimento di Chimica Fisica, Università di Padova, Via Loredan 2, I-35131 Padova, Italy, Institut für Physikalische und Theoretische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie Str
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21
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22
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Gromov I, Krymov V, Manikandan P, Arieli D, Goldfarb D. A W-band pulsed ENDOR spectrometer: setup and application to transition metal centers. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 1999; 139:8-17. [PMID: 10388579 DOI: 10.1006/jmre.1999.1762] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The design and performance of a 95 GHz pulsed W-band EPR/ENDOR spectrometer is described with emphasis on the ENDOR part. Its unique feature is the easy and fast sample exchange at 4.2 K for frozen solution and single crystal samples. In addition, the microwave bridge power output is relatively high (maximum 267 mW), which allows the application of short microwave pulses. This increases the sensitivity in echo experiments because of the broader excitation bandwidth and the possibility of employing short pulse intervals, as long as the dead time does not increase significantly with the power. The spectrometer features two microwave and radiofrequency (0.1-220 MHz, 3 kW pulse power) channels and a 6 T superconducting magnet in a solenoid configuration. The magnet is equipped with cryogenic sweep coils providing a sweep range of +/-0. 4 and +/-0.2 T for a center field of 0-4 and 4-6 T, respectively. The spectrometer performance is demonstrated on Cu(II) centers in single crystals, a zeolite polycrystalline sample, and a protein frozen solution.
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Affiliation(s)
- I Gromov
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, 76100, Israel.
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23
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Tang J, Utschig LM, Poluektov O, Thurnauer MC. Transient W-Band EPR Study of Sequential Electron Transfer in Photosynthetic Bacterial Reaction Centers. J Phys Chem B 1999. [DOI: 10.1021/jp990236t] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jau Tang
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
| | - Lisa M. Utschig
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
| | - Oleg Poluektov
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
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24
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Kamlowski A, Zech SG, Fromme P, Bittl R, Lubitz W, Witt HT, Stehlik D. The Radical Pair State in Photosystem I Single Crystals: Orientation Dependence of the Transient Spin-Polarized EPR Spectra. J Phys Chem B 1998. [DOI: 10.1021/jp9817022] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Kamlowski
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Stephan G. Zech
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Petra Fromme
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Robert Bittl
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Wolfgang Lubitz
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Horst T. Witt
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Dietmar Stehlik
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany
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25
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Yang F, Shen G, Schluchter WM, Zybailov BL, Ganago AO, Vassiliev IR, Bryant DA, Golbeck JH. Deletion of the PsaF Polypeptide Modifies the Environment of the Redox-Active Phylloquinone (A1). Evidence for Unidirectionality of Electron Transfer in Photosystem I. J Phys Chem B 1998. [DOI: 10.1021/jp981952i] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fan Yang
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Gaozhong Shen
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Wendy M. Schluchter
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Boris L. Zybailov
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Alexander O. Ganago
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Ilya R. Vassiliev
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Donald A. Bryant
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - John H. Golbeck
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, and Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802
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26
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Rohrer M, MacMillan F, Prisner TF, Gardiner AT, Möbius K, Lubitz W. Pulsed ENDOR at 95 GHz on the Primary Acceptor Ubisemiquinone in Photosynthetic Bacterial Reaction Centers and Related Model Systems. J Phys Chem B 1998. [DOI: 10.1021/jp9805104] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Rohrer
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - F. MacMillan
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - T. F. Prisner
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - A. T. Gardiner
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - K. Möbius
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - W. Lubitz
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany, and Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
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27
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Gerfen GJ, van der Donk WA, Yu G, McCarthy JR, Jarvi ET, Matthews DP, Farrar C, Griffin RG, Stubbe J. Characterization of a Substrate-Derived Radical Detected during the Inactivation of Ribonucleotide Reductase from Escherichia coli by 2‘-Fluoromethylene-2‘-deoxycytidine 5‘-Diphosphate. J Am Chem Soc 1998. [DOI: 10.1021/ja972166e] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gary J. Gerfen
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - Wilfred A. van der Donk
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - Guixue Yu
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - James R. McCarthy
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - Esa T. Jarvi
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - Donald P. Matthews
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - Christian Farrar
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - Robert G. Griffin
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
| | - JoAnne Stubbe
- Contribution from the Departments of Chemistry and Biology and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Marion Merrell Dow Research Institute, 2110 East Galbraith Road, Cincinnati, Ohio 45215
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28
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Bratt PJ, Rohrer M, Krzystek J, Evans MCW, Brunel LC, Angerhofer A. Submillimeter High-Field EPR Studies of the Primary Donor in Plant Photosystem I P700•+. J Phys Chem B 1997. [DOI: 10.1021/jp9725238] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter J. Bratt
- The Department of Chemistry, The University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, and The Department of Biology, Darwin Building, University College London, Gower Street, London WC1H 9EW, United Kingdom
| | - Martin Rohrer
- The Department of Chemistry, The University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, and The Department of Biology, Darwin Building, University College London, Gower Street, London WC1H 9EW, United Kingdom
| | - J. Krzystek
- The Department of Chemistry, The University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, and The Department of Biology, Darwin Building, University College London, Gower Street, London WC1H 9EW, United Kingdom
| | - Michael C. W. Evans
- The Department of Chemistry, The University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, and The Department of Biology, Darwin Building, University College London, Gower Street, London WC1H 9EW, United Kingdom
| | - Louis-Claude Brunel
- The Department of Chemistry, The University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, and The Department of Biology, Darwin Building, University College London, Gower Street, London WC1H 9EW, United Kingdom
| | - Alexander Angerhofer
- The Department of Chemistry, The University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, and The Department of Biology, Darwin Building, University College London, Gower Street, London WC1H 9EW, United Kingdom
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Kamlowski A, van der Est A, Fromme P, Stehlik D. Low temperature EPR on Photosystem I single crystals: orientation of the iron–sulfur centers FA and FB. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(96)00161-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Bittl R, Zech SG. Pulsed EPR Study of Spin-Coupled Radical Pairs in Photosynthetic Reaction Centers: Measurement of the Distance Between and in Photosystem I and between and in Bacterial Reaction Centers. J Phys Chem B 1997. [DOI: 10.1021/jp962256q] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert Bittl
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Stephan G. Zech
- Max-Volmer-Institut für Biophysikalische Chemie und Biochemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
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31
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van der Est A, Prisner T, Bittl R, Fromme P, Lubitz W, Möbius K, Stehlik D. Time-Resolved X-, K-, and W-Band EPR of the Radical Pair State of Photosystem I in Comparison with in Bacterial Reaction Centers. J Phys Chem B 1997. [DOI: 10.1021/jp9622086] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. van der Est
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - T. Prisner
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - R. Bittl
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - P. Fromme
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - W. Lubitz
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - K. Möbius
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - D. Stehlik
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany, and Max Volmer Institut, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
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Electron transfer and arrangement of the redox cofactors in photosystem I. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(96)00112-0] [Citation(s) in RCA: 380] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Weber S, Ohmes E, Thurnauer MC, Norris JR, Kothe G. Light-generated nuclear quantum beats: a signature of photosynthesis. Proc Natl Acad Sci U S A 1995; 92:7789-93. [PMID: 11607572 PMCID: PMC41231 DOI: 10.1073/pnas.92.17.7789] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Light-induced radical pairs in deuterated and deuterated plus 15N-substituted Synechococcus lividus cyanobacteria have been studied by transient EPR following pulsed laser excitation. Nuclear quantum beats are observed in the transverse electron magnetization at lower temperatures. Model calculations for the time profiles, evaluated at the high-field emissive maximum of the spectrum, indicate assignment of these coherences to nitrogen nuclei in the primary donor. Thorough investigation of the nuclear modulation patterns can provide detailed information on the electronic structure of the primary donor, providing insight into the mechanism of the primary events of plant photosynthesis.
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Affiliation(s)
- S Weber
- Department of Physical Chemistry, University of Stuttgart, Stuttgart, Germany
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van den Brink JS, Spoyalov AP, Gast P, van Liemt WB, Raap J, Lugtenburg J, Hoff AJ. Asymmetric binding of the primary acceptor quinone in reaction centers of the photosynthetic bacterium Rhodobacter sphaeroides R26, probed with Q-band (35 GHz) EPR spectroscopy. FEBS Lett 1994; 353:273-6. [PMID: 7957873 DOI: 10.1016/0014-5793(94)01047-1] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The reaction center (RC)-bound primary acceptor quinone QA of the photosynthetic bacterium Rhodobacter sphaeroides R26 functions as a one-electron gate. The radical anion QA.- is proposed to have an asymmetric electron distribution, induced by the protein environment. We replace the native ubiquinone-10 (UQ10) with specifically 13C-labelled UQ10, and use Q-band (35 GHz) EPR spectroscopy to investigate this phenomenon in closer detail. The direct observation of the 13C-hyperfine splitting of the gz-component of UQ10A.- in the RC and in frozen isopropanol shows that the electron spin distribution is symmetric in the isopropanol glass, and asymmetric in the RC. Our results allow qualitative assessment of the spin and charge distribution for QA.- in the RC. The carbonyl oxygen of the semiquinone anion nearest to the S = 2 Fe(2+)-ion and QB is shown to acquire the highest (negative) charge density.
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Affiliation(s)
- J S van den Brink
- Department of Biophysics, Huygens Laboratory, Leiden University, The Netherlands
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Un S, Brunel LC, Brill TM, Zimmermann JL, Rutherford AW. Angular orientation of the stable tyrosyl radical within photosystem II by high-field 245-GHz electron paramagnetic resonance. Proc Natl Acad Sci U S A 1994; 91:5262-6. [PMID: 8202479 PMCID: PMC43974 DOI: 10.1073/pnas.91.12.5262] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The 4 K 245-GHz/8.7-T electron paramagnetic resonance spectrum of the stable tyrosyl radical in photosystem II, known as TyrD., has been measured. Illumination at 200 K enhances the signal intensity of TyrD. by a factor of > 40 compared to the signal obtained from dark-adapted samples. This signal enhancement and the unusual line shape of the TyrD. resonance result from the magnetic dipolar coupling of the radical to the manganese cluster involved in oxygen evolution. The relative angular orientation of the manganese cluster with respect to TyrD. has been determined from line-shape analysis. The resonance arising from TyrD. in Tris-washed manganese-free photosystem II sample is also distorted. This effect probably originates from the influence of the nonheme iron on the spin relaxation of the tyrosyl radical. The relative angular orientation of the nonheme iron has also been determined. Oriented samples were used to determine the angular orientation of TyrD. with respect to the membrane plane. Combining angular data with published distances, we have constructed a three-dimensional picture of the relative positions of TyrD., the manganese cluster, and the nonheme iron. The data suggest a more symmetrical placement of the manganese relative to TyrD. and TyrZ, the tyrosine involved in electron transfer, than is usually assumed in current models of photosystem II.
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Affiliation(s)
- S Un
- Centre National de la Recherche Scientifique Unité de Recherche Associée 1290, Department Biologie Cellulaire et Moleculaire, Centre d'Etudes de Saclay, Gif-sur-Yvette, France
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