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Nguyen HH, Song Y, Maret EL, Silori Y, Willow R, Yocum CF, Ogilvie JP. Charge separation in the photosystem II reaction center resolved by multispectral two-dimensional electronic spectroscopy. SCIENCE ADVANCES 2023; 9:eade7190. [PMID: 37134172 PMCID: PMC10156117 DOI: 10.1126/sciadv.ade7190] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The photosystem II reaction center (PSII RC) performs the primary energy conversion steps of oxygenic photosynthesis. While the PSII RC has been studied extensively, the similar time scales of energy transfer and charge separation and the severely overlapping pigment transitions in the Qy region have led to multiple models of its charge separation mechanism and excitonic structure. Here, we combine two-dimensional electronic spectroscopy (2DES) with a continuum probe and two-dimensional electronic vibrational spectroscopy (2DEV) to study the cyt b559-D1D2 PSII RC at 77 K. This multispectral combination correlates the overlapping Qy excitons with distinct anion and pigment-specific Qx and mid-infrared transitions to resolve the charge separation mechanism and excitonic structure. Through extensive simultaneous analysis of the multispectral 2D data, we find that charge separation proceeds on multiple time scales from a delocalized excited state via a single pathway in which PheoD1 is the primary electron acceptor, while ChlD1 and PD1 act in concert as the primary electron donor.
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Affiliation(s)
- Hoang H Nguyen
- Department of Physics and Biophysics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
| | - Yin Song
- Department of Physics and Biophysics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
- School of Optics and Photonics, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China
| | - Elizabeth L Maret
- Department of Physics and Biophysics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
| | - Yogita Silori
- Department of Physics and Biophysics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
| | - Rhiannon Willow
- Department of Physics and Biophysics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
| | - Charles F Yocum
- Department of Molecular, Cellular and Developmental Biology and Department of Chemistry, University of Michigan, 450 Church St, Ann Arbor, MI 48109, USA
| | - Jennifer P Ogilvie
- Department of Physics and Biophysics, University of Michigan, 450 Church St., Ann Arbor, MI 48109, USA
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2
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D'Haene SE, Sobotka R, Bučinská L, Dekker JP, Komenda J. Interaction of the PsbH subunit with a chlorophyll bound to histidine 114 of CP47 is responsible for the red 77K fluorescence of Photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:1327-34. [PMID: 26164101 DOI: 10.1016/j.bbabio.2015.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 07/03/2015] [Accepted: 07/07/2015] [Indexed: 10/23/2022]
Abstract
A characteristic feature of the active Photosystem II (PSII) complex is a red-shifted low temperature fluorescence emission at about 693nm. The origin of this emission has been attributed to a monomeric 'red' chlorophyll molecule located in the CP47 subunit. However, the identity and function of this chlorophyll remain uncertain. In our previous work, we could not detect the red PSII emission in a mutant of the cyanobacterium Synechocystis sp. PCC 6803 lacking PsbH, a small transmembrane subunit bound to CP47. However, it has not been clear whether the PsbH is structurally essential for the red emission or the observed effect of mutation has been indirectly caused by compromised PSII stability and function. In the present work we performed a detailed spectroscopic characterization of PSII in cells of a mutant lacking PsbH and Photosystem I and we also characterized PSII core complexes isolated from this mutant. In addition, we purified and characterized the CP47 assembly modules containing and lacking PsbH. The results clearly confirm an essential role of PsbH in the origin of the PSII red emission and also demonstrate that PsbH stabilizes the binding of one β-carotene molecule in PSII. Crystal structures of the cyanobacterial PSII show that PsbH directly interacts with a single monomeric chlorophyll ligated by the histidine 114 residue of CP47 and we conclude that this peripheral chlorophyll hydrogen-bonded to PsbH is responsible for the red fluorescence state of CP47. Given the proximity of β-carotene this state could participate in the dissipation of excessive light energy.
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Affiliation(s)
- Sandrine E D'Haene
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands.
| | - Roman Sobotka
- Institute of Microbiology, Laboratory of Photosynthesis, Centre Algatech, Opatovický mlýn, 379 81 Třeboň, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, Czech Republic
| | - Lenka Bučinská
- Institute of Microbiology, Laboratory of Photosynthesis, Centre Algatech, Opatovický mlýn, 379 81 Třeboň, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, Czech Republic
| | - Jan P Dekker
- Biophysics of Photosynthesis/Physics of Energy, Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands
| | - Josef Komenda
- Institute of Microbiology, Laboratory of Photosynthesis, Centre Algatech, Opatovický mlýn, 379 81 Třeboň, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, Czech Republic
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3
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Zabelin AA, Shkuropatova VA, Makhneva ZK, Moskalenko AA, Shuvalov VA, Shkuropatov AY. Chemically modified reaction centers of photosystem II: Exchange of pheophytin a with 7-deformyl-7-hydroxymethyl-pheophytin b. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1837:1870-1881. [DOI: 10.1016/j.bbabio.2014.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/14/2014] [Accepted: 08/19/2014] [Indexed: 11/28/2022]
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Viruvuru V, Fragata M. Photochemical cooperativity in photosystem II. Characterization of oxygen evolution discontinuities in the light-response curves. Phys Chem Chem Phys 2008; 10:6607-14. [PMID: 18989471 DOI: 10.1039/b809294j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In two previous papers (Fragata et al., J. Phys. Chem. B, 2005, 109, 14707-14714; Fragata et al., J. Phys. Chem. B, 2007, 111, 3315-3320), it was shown that the variation of oxygen evolution with the light intensity (I) in photosystem II (PSII) in steady state conditions can be formulated according to the Langmuir adsorption isotherm for heterogeneous catalysis. This yielded the expression OEth = OEth(max) I/(L1/2 + I), where OEth is the theoretical oxygen evolution, OEth(max) the maximum oxygen evolution, and L1/2 the irradiance giving OEth(max)/2. In this approximation, the photons interaction with the chlorophylls in the PSII reaction center is assumed to be a heterogeneous reaction in which the light is represented as a stream of particles instead of an electromagnetic wave. That is, the chlorophyll molecules are the adsorption surfaces (or heterogeneous catalysts), and the incident (or exciting) photons are the substrate, or the reagent. Recently, the examination of new experimental data obtained with 2,6-dichloro-p-benzoquinone (DCBQ) and p-benzoquinone (pBQ) as exogenous electron acceptors, disclosed the presence of oxygen evolution discontinuities (or transitions) in the light-response curves. The new data were fitted with a mathematical summation of hyperbola of order n(i) > 1, OEth = Sigma(i) [OEth(max)]iIn(i)/[(L1/2)i(n(i)) + I(n(i))], where the n(i)'s are the number of sites used by the incident photons in their interaction with the photosynthetic pigments in each population i of PSII centers open for photochemistry. The mathematical simulations yielded only three distinct n(i)'s, that is, 1.8, 4.8, 8.5 and 1.8, 4.2, 8.4 for isolated PSII particles incubated with DCBQ and pBQ, respectively. Implicitly, this means the simultaneous excitation of each PSII reaction center with more than one photon, that is, the excitation of more than one pigment molecule. It is suggested that these transitions have their origin in the cooperative interaction of the photons and the chlorophylls, and most likely also the pheophytins. This indicates that the discontinuities (or transitions) observed in the light-response curves of oxygen evolution are consistent with the hypothesis of photochemical cooperativity in photosystem II.
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Affiliation(s)
- V Viruvuru
- Département de Chimie-Biologie, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada G9A 5H7.
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Groot ML, Pawlowicz NP, van Wilderen LJGW, Breton J, van Stokkum IHM, van Grondelle R. Initial electron donor and acceptor in isolated Photosystem II reaction centers identified with femtosecond mid-IR spectroscopy. Proc Natl Acad Sci U S A 2005; 102:13087-92. [PMID: 16135567 PMCID: PMC1196200 DOI: 10.1073/pnas.0503483102] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Indexed: 11/18/2022] Open
Abstract
Despite the apparent similarity between the plant Photosystem II reaction center (RC) and its purple bacterial counterpart, we show in this work that the mechanism of charge separation is very different for the two photosynthetic RCs. By using femtosecond visible-pump-mid-infrared probe spectroscopy in the region of the chlorophyll ester and keto modes, between 1,775 and 1,585 cm(-1), with 150-fs time resolution, we show that the reduction of pheophytin occurs on a 0.6- to 0.8-ps time scale, whereas P+, the precursor state for water oxidation, is formed after approximately 6 ps. We conclude therefore that in the Photosystem II RC the primary charge separation occurs between the "accessory chlorophyll" Chl(D1) and the pheophytin on the so-called active branch.
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Affiliation(s)
- Marie Louise Groot
- Faculty of Sciences, Vrije Universiteit, 1081 HV, Amsterdam, The Netherlands.
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6
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Andrizhiyevskaya EG, Frolov D, van Grondelle R, Dekker JP. On the role of the CP47 core antenna in the energy transfer and trapping dynamics of Photosystem II. Phys Chem Chem Phys 2004. [DOI: 10.1039/b411977k] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zehetner A, Scheer H, Siffel P, Vacha F. Photosystem II reaction center with altered pigment-composition: reconstitution of a complex containing five chlorophyll a per two pheophytin a with modified chlorophylls. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1556:21-8. [PMID: 12351215 DOI: 10.1016/s0005-2728(02)00282-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Pigment-depleted Photosystem II reaction centers (PS II-RCs) from a higher plant (pea) containing five chlorophyll a (Chl) per two pheophytin a (Phe), were treated with Chl and several derivatives under exchange conditions [FEBS Lett. 434 (1998) 88]. The resulting reconstituted complexes were compared to those obtained by pigment exchange of "conventional" PS II-RCs containing six Chl per two Phe. (1) The extraction of one Chl is fully reversible. (2) The site of extraction is the same as the one into which previously extraneous pigments have been exchanged, most likely the peripheral D1-H118. (3) Introducing an efficient quencher (Ni-Chl) into this site results in only 25% reduction of fluorescence, indicating incomplete energy equilibration among the "core" and peripheral chlorophylls.
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Affiliation(s)
- Andrea Zehetner
- Department Biologie I-Botanik, Universität München, Menzinger Str. 67, D-80638, Munich, Germany
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Vácha F, Durchan M, Siffel P. Excitonic interactions in the reaction centre of photosystem II studied by using circular dichroism. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1554:147-52. [PMID: 12160987 DOI: 10.1016/s0005-2728(02)00238-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Changes in excitonic interactions of photosystem II (PSII) reaction centre (RC) pigments upon light-induced oxidation of primary donor (P680) or reduction of primary acceptor (pheophytin (Pheo)) were analysed using circular dichroism (CD). The CD spectrum of PSII RC shows positive bands at 417, 435 and 681 and negative bands at 447 and 664 nm. Oxidation of the primary donor by illuminating the sample in the presence of silicomolybdate resulted in nearly symmetric decrease of CD amplitudes at 664 and 684 nm. In the Soret region, the maximum bleaching of CD signal was detected at 449 and 440 nm. Accumulation of reduced Pheo in the presence of dithionite brought about much lower changes in CD amplitudes than P680 oxidation. In this case, only a small asymmetric bleaching at 680 and 668 nm in the red region and a bleaching at 445, 435 and 416 nm in the Soret region has been detected. Therefore, we suppose that the contribution of the Pheo of the primary acceptor to the total CD signal of RC is negligible. In contrast to the oxidation of primary donor, the light-induced change in the CD spectrum upon primary acceptor reduction was strongly temperature-dependent. The reversible CD bleaching was completely inhibited below 200 K, although the reduced Pheo was accumulated even at a temperature of 77 K. Since the temperature does not influence the excitonic interaction, the temperature dependence of the CD changes upon Pheo reduction does not support the model of Pheo excitonically interacting with the other chlorophylls (Chl) of the RC. We propose that Pheo should not be considered as a part of a multimer model.
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Affiliation(s)
- Frantisek Vácha
- Photosynthesis Research Centre of Faculty of Biological Sciences, University of South Bohemia and Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovská 31, 370 05, Ceské Budejovice, Czech Republic.
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Tracewell CA, Vrettos JS, Bautista JA, Frank HA, Brudvig GW. Carotenoid photooxidation in photosystem II. Arch Biochem Biophys 2001; 385:61-9. [PMID: 11361027 DOI: 10.1006/abbi.2000.2150] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Carotenoids are known to function as light-harvesting pigments and they play important roles in photoprotection in both plant and bacterial photosynthesis. These functions are also important for carotenoids in photosystem II. In addition, beta-carotene recently has been found to function as a redox intermediate in an alternate pathway of electron transfer within photosystem II. This redox role of a carotenoid in photosystem II is unique among photosynthetic reaction centers and stems from the very highly oxidizing intermediates that form in the process of water oxidation. In this minireview, an overview of the electron-transfer reactions in photosystem II is presented, with an emphasis on those involving carotenoids. The carotenoid composition of photosystem II and the physical methods used to study the structure of the redox-active carotenoid are reviewed. Possible roles of carotenoid cations in photoprotection of photosystem II are discussed.
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Affiliation(s)
- C A Tracewell
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, USA
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11
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Debus RJ. Amino acid residues that modulate the properties of tyrosine Y(Z) and the manganese cluster in the water oxidizing complex of photosystem II. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1503:164-86. [PMID: 11115632 DOI: 10.1016/s0005-2728(00)00221-8] [Citation(s) in RCA: 150] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The catalytic site for photosynthetic water oxidation is embedded in a protein matrix consisting of nearly 30 different polypeptides. Residues from several of these polypeptides modulate the properties of the tetrameric Mn cluster and the redox-active tyrosine residue, Y(Z), that are located at the catalytic site. However, most or all of the residues that interact directly with Y(Z) and the Mn cluster appear to be contributed by the D1 polypeptide. This review summarizes our knowledge of the environments of Y(Z) and the Mn cluster as obtained from the introduction of site-directed, deletion, and other mutations into the photosystem II polypeptides of the cyanobacterium Synechocystis sp. PCC 6803 and the green alga Chlamydomonas reinhardtii.
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Affiliation(s)
- R J Debus
- Department of Biochemistry, University of California, Riverside, CA 92521-0129, USA.
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12
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Boekema EJ, Van Roon H, Van Breemen JF, Dekker JP. Supramolecular organization of photosystem II and its light-harvesting antenna in partially solubilized photosystem II membranes. EUROPEAN JOURNAL OF BIOCHEMISTRY 1999; 266:444-52. [PMID: 10561584 DOI: 10.1046/j.1432-1327.1999.00876.x] [Citation(s) in RCA: 153] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We present an extended analysis of the organization of green plant photosystem II and its associated light-harvesting antenna using electron microscopy and image analysis. The analysis is based on a large dataset of 16 600 projections of negatively stained PSII-LHCII supercomplexes and megacomplexes prepared by means of three different pretreatments. In addition to our previous work on this system [Boekema, E.J., van Roon, H., Calkoen, F., Bassi, R. and Dekker, J.P. (1999) Biochemistry 38, 2233-2239], the following results were obtained. The rotational orientation of trimeric LHCII at the S, M and L binding positions was determined. It was found that compared to the S trimer, the M and L trimers are rotationally shifted by about -20 degrees and -50 degrees, respectively. The number of projections with empty CP29, CP26 and CP24 binding sites was found to be about 0, 18 and 4%, respectively. We suggest that CP26 and CP24 are not required for the binding of trimeric LHCII at any of the three binding positions. A new type of megacomplex was observed with a characteristic windmill-like shape. This type III megacomplex consists of two C2S2 supercomplexes connected at their CP26 tips. Structural variation in the region of the central dimeric photosystem II complex was found to occur at one specific position near the periphery of the complex. We attribute this variation to the partial absence of an extrinsic polypeptide or one or more small intrinsic membrane proteins.
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Affiliation(s)
- E J Boekema
- Department of Biophysical Chemistry, Groningen Biomoleular Sciences and Biotechnology Institute, University of Groningen, The Netherlands
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13
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Groot ML, Frese RN, de Weerd FL, Bromek K, Pettersson A, Peterman EJ, van Stokkum IH, van Grondelle R, Dekker JP. Spectroscopic properties of the CP43 core antenna protein of photosystem II. Biophys J 1999; 77:3328-40. [PMID: 10585955 PMCID: PMC1300604 DOI: 10.1016/s0006-3495(99)77164-x] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
CP43 is a chlorophyll-protein complex that funnels excitation energy from the main light-harvesting system of photosystem II to the photochemical reaction center. We purified CP43 from spinach photosystem II membranes in the presence of the nonionic detergent n-dodecyl-beta,D-maltoside and recorded its spectroscopic properties at various temperatures between 4 and 293 K by a number of polarized absorption and fluorescence techniques, fluorescence line narrowing, and Stark spectroscopy. The results indicate two "red" states in the Q(y) absorption region of the chlorophylls. The first peaks at 682.5 nm at 4 K, has an extremely narrow bandwidth with a full width at half-maximum of approximately 2.7 nm (58 cm(-1)) at 4 K, and has the oscillator strength of a single chlorophyll. The second peaks at approximately 679 nm, has a much broader bandshape, is caused by several excitonically interacting chlorophylls, and is responsible for all 4 K absorption at wavelengths longer than 685 nm. The Stark spectrum of CP43 resembles the first derivative of the absorption spectrum and has an exceptionally small overall size, which we attribute to opposing orientations of the monomer dipole moments of the excitonically coupled pigments.
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Affiliation(s)
- M L Groot
- Division of Physics and Astronomy, Institute of Molecular Biological Sciences, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands
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14
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Jankowiak R, Rätsep M, Picorel R, Seibert M, Small GJ. Excited States of the 5-Chlorophyll Photosystem II Reaction Center. J Phys Chem B 1999. [DOI: 10.1021/jp9906738] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. Jankowiak
- Ames Laboratory−U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, Apdo. 202, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - M. Rätsep
- Ames Laboratory−U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, Apdo. 202, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - R. Picorel
- Ames Laboratory−U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, Apdo. 202, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - M. Seibert
- Ames Laboratory−U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, Apdo. 202, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - G. J. Small
- Ames Laboratory−U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, Apdo. 202, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
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15
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den Hartog FTH, Vacha F, Lock AJ, Barber J, Dekker JP, Völker S. Comparison of the Excited-State Dynamics of Five- and Six-Chlorophyll Photosystem II Reaction Center Complexes. J Phys Chem B 1998. [DOI: 10.1021/jp982791l] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. T. H. den Hartog
- Center for the Study of Excited States of Molecules, Huygens and Gorlaeus Laboratories, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands, Faculty of Biological Sciences, University of South Bohemia, Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovska 31, Ceske Budejovice, 370 05, Czech Republic, Photosynthesis Research Group, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, and
| | - F. Vacha
- Center for the Study of Excited States of Molecules, Huygens and Gorlaeus Laboratories, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands, Faculty of Biological Sciences, University of South Bohemia, Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovska 31, Ceske Budejovice, 370 05, Czech Republic, Photosynthesis Research Group, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, and
| | - A. J. Lock
- Center for the Study of Excited States of Molecules, Huygens and Gorlaeus Laboratories, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands, Faculty of Biological Sciences, University of South Bohemia, Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovska 31, Ceske Budejovice, 370 05, Czech Republic, Photosynthesis Research Group, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, and
| | - J. Barber
- Center for the Study of Excited States of Molecules, Huygens and Gorlaeus Laboratories, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands, Faculty of Biological Sciences, University of South Bohemia, Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovska 31, Ceske Budejovice, 370 05, Czech Republic, Photosynthesis Research Group, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, and
| | - J. P. Dekker
- Center for the Study of Excited States of Molecules, Huygens and Gorlaeus Laboratories, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands, Faculty of Biological Sciences, University of South Bohemia, Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovska 31, Ceske Budejovice, 370 05, Czech Republic, Photosynthesis Research Group, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, and
| | - S. Völker
- Center for the Study of Excited States of Molecules, Huygens and Gorlaeus Laboratories, University of Leiden, P.O. Box 9504, 2300 RA Leiden, The Netherlands, Faculty of Biological Sciences, University of South Bohemia, Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovska 31, Ceske Budejovice, 370 05, Czech Republic, Photosynthesis Research Group, Department of Biochemistry, Imperial College of Science, Technology and Medicine, London SW7 2AY, United Kingdom, and
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16
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Gall B, Scheer H. Stabilization of photosystem II reaction centers: influence of bile salt detergents and low pH. FEBS Lett 1998; 431:161-6. [PMID: 9708894 DOI: 10.1016/s0014-5793(98)00739-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Rapid deterioration of samples is a major obstacle in research on the isolated reaction center of photosystem II. Its stability was tested systematically using a wide range of detergents, varying pH and temperature. Stability and activity did not depend on ionic properties of detergents or on critical micellar concentration. However, both were significantly increased by bile salt detergents in the dark as well as in the light. Low pH (5.5) and low temperature further improved stability. The results suggest that in particular the zwitterionic bile salt detergent, CHAPS, in pH 5.5 buffers is a very useful detergent and even superior to dodecylmaltoside for work with photosystem II reaction centers.
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Affiliation(s)
- B Gall
- Botanisches Institut der Universität München, Munich, Germany
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17
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Peterman EJ, van Amerongen H, van Grondelle R, Dekker JP. The nature of the excited state of the reaction center of photosystem II of green plants: a high-resolution fluorescence spectroscopy study. Proc Natl Acad Sci U S A 1998; 95:6128-33. [PMID: 9600929 PMCID: PMC27597 DOI: 10.1073/pnas.95.11.6128] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/1997] [Accepted: 03/16/1998] [Indexed: 02/07/2023] Open
Abstract
We studied the electronically excited state of the isolated reaction center of photosystem II with high-resolution fluorescence spectroscopy at 5 K and compared the obtained spectral features with those obtained earlier for the primary electron donor. The results show that there is a striking resemblance between the emitting and charge-separating states in the photosystem II reaction center, such as a very similar shape of the phonon wing with characteristic features at 19 and 80 cm-1, almost identical frequencies of a number of vibrational modes, a very similar double-Gaussian shape of the inhomogeneous distribution function, and relatively strong electron-phonon coupling for both states. We suggest that the emission at 5 K originates either from an exciton state delocalized over the inactive branch of the photosystem or from a fraction of the primary electron donor that is long-lived at 5 K. The latter possibility can be explained by a distribution of the free energy difference of the primary charge separation reaction around zero. Both possibilities are in line with the idea that the state that drives primary charge separation in the reaction center of photosystem II is a collective state, with contributions from all chlorophyll molecules in the central part of the complex.
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Affiliation(s)
- E J Peterman
- Department of Physics and Astronomy and Institute for Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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Picorel R, Chumanov G, Torrado E, Cotton TM, Seibert M. Surface-Enhanced Resonance Raman Scattering Spectroscopy of Plant Photosystem II Reaction Centers Excited on the Red-Edge of the Qy Band. J Phys Chem B 1998. [DOI: 10.1021/jp980188x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rafael Picorel
- Estación Experimental de Aula Dei (CSIC), Apdo. 202, 50080-Zaragoza, Spain, Department of Chemistry, Iowa State University, Ames Iowa 50011, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - George Chumanov
- Estación Experimental de Aula Dei (CSIC), Apdo. 202, 50080-Zaragoza, Spain, Department of Chemistry, Iowa State University, Ames Iowa 50011, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - Elena Torrado
- Estación Experimental de Aula Dei (CSIC), Apdo. 202, 50080-Zaragoza, Spain, Department of Chemistry, Iowa State University, Ames Iowa 50011, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - Therese M. Cotton
- Estación Experimental de Aula Dei (CSIC), Apdo. 202, 50080-Zaragoza, Spain, Department of Chemistry, Iowa State University, Ames Iowa 50011, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - Michael Seibert
- Estación Experimental de Aula Dei (CSIC), Apdo. 202, 50080-Zaragoza, Spain, Department of Chemistry, Iowa State University, Ames Iowa 50011, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
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Boekema EJ, van Roon H, Dekker JP. Specific association of photosystem II and light-harvesting complex II in partially solubilized photosystem II membranes. FEBS Lett 1998; 424:95-9. [PMID: 9537522 DOI: 10.1016/s0014-5793(98)00147-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this study, we report the structural characterization of photosystem II complexes obtained from partially solubilized photosystem II membranes. Direct observation by electron microscopy, within a few minutes after a mild disruption of the membranes with the detergent n-dodecyl-alpha,D-maltoside, revealed the presence of several large supramolecular complexes. Images of these complexes were subjected to multivariate statistical analysis and classification procedures, resolving a new complex consisting of the previously characterized dimeric supercomplex of photosystem II and light-harvesting complex II [Boekema et al., Proc. Natl. Acad. Sci. USA 92 (1995) 175-179] and two additional, symmetrically organized protein masses each containing a second type of trimeric light-harvesting II complex. We conclude that large and labile integral membrane proteins, such as photosystem II, can be quickly structurally characterized without extensive purification.
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Affiliation(s)
- E J Boekema
- Department of Biophysical Chemistry, BIOSON Research Centre, University of Groningen, The Netherlands
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Groot ML, van Grondelle R, Leegwater JA, van Mourik F. Radical Pair Quantum Yield in Reaction Centers of Photosystem II of Green Plants and of the Bacterium Rhodobacter sphaeroides. Saturation Behavior with Sub-picosecond Pulses. J Phys Chem B 1997. [DOI: 10.1021/jp971113g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marie-Louise Groot
- Department of Physics and Astronomy and Institute of Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Rienk van Grondelle
- Department of Physics and Astronomy and Institute of Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Jan-Adriaan Leegwater
- Department of Physics and Astronomy and Institute of Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Frank van Mourik
- Department of Physics and Astronomy and Institute of Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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Characterization by electron microscopy of dimeric Photosystem II core complexes from spinach with and without CP43. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(97)00040-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Groot ML, Eijckelhoff C, Dekker JP. Charge separation in the reaction center of photosystem II studied as a function of temperature. Proc Natl Acad Sci U S A 1997; 94:4389-94. [PMID: 9113999 PMCID: PMC20732 DOI: 10.1073/pnas.94.9.4389] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In photosystem II of green plants the key photosynthetic reaction consists of the transfer of an electron from the primary donor called P680 to a nearby pheophytin molecule. We analyzed the temperature dependence of this reaction by subpicosecond transient absorption spectroscopy over the temperature range 20-240 K using isolated photosystem II reaction centers from spinach. After excitation in the red edge of the Qy absorption band, the decay of the excited state can conveniently be described by two kinetic components that both accelerate with temperature. This temperature behavior differs remarkably from that observed in purple bacterial reaction centers. We attribute the first component, which accelerates from 2.6 ps at 20 K to 0.4 ps at 240 K, to charge separation after direct excitation of P680, and explain its temperature dependence by an intermediate that lies in energy above the singlet-excited P680 and that possibly has charge-transfer character. The second component accelerates from 120 ps at 20 K to 18 ps at 240 K and is attributed to charge separation after direct excitation of the "trap" state near-degenerate with P680 and subsequent slow energy transfer from this trap state to P680. We suggest that the slow energy transfer from the trap state to P680 plays an important role in the kinetics of radical pair formation at room temperature.
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Affiliation(s)
- M L Groot
- Department of Physics and Astronomy and Institute of Molecular Biological Sciences, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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Eijckelhoff C, Vacha F, van Grondelle R, Dekker JP, Barber J. Spectroscopic characterization of a 5 Chl a photosystem II reaction center complex. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(96)00144-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Stoichiometry of pigments and radical pair formation under saturating pulse excitation in D1/D2/cytb559 preparations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1997. [DOI: 10.1016/s0005-2728(96)00151-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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