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Acharya K, Neupane B, Zazubovich V, Sayre RT, Picorel R, Seibert M, Jankowiak R. Site energies of active and inactive pheophytins in the reaction center of Photosystem II from Chlamydomonas reinhardtii. J Phys Chem B 2012; 116:3890-9. [PMID: 22397491 DOI: 10.1021/jp3007624] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It is widely accepted that the primary electron acceptor in various Photosystem II (PSII) reaction center (RC) preparations is pheophytin a (Pheo a) within the D1 protein (Pheo(D1)), while Pheo(D2) (within the D2 protein) is photochemically inactive. The Pheo site energies, however, have remained elusive, due to inherent spectral congestion. While most researchers over the past two decades placed the Q(y)-states of Pheo(D1) and Pheo(D2) bands near 678-684 and 668-672 nm, respectively, recent modeling [Raszewski et al. Biophys. J. 2005, 88, 986 - 998; Cox et al. J. Phys. Chem. B 2009, 113, 12364 - 12374] of the electronic structure of the PSII RC reversed the assignment of the active and inactive Pheos, suggesting that the mean site energy of Pheo(D1) is near 672 nm, whereas Pheo(D2) (~677.5 nm) and Chl(D1) (~680 nm) have the lowest energies (i.e., the Pheo(D2)-dominated exciton is the lowest excited state). In contrast, chemical pigment exchange experiments on isolated RCs suggested that both pheophytins have their Q(y) absorption maxima at 676-680 nm [Germano et al. Biochemistry 2001, 40, 11472 - 11482; Germano et al. Biophys. J. 2004, 86, 1664 - 1672]. To provide more insight into the site energies of both Pheo(D1) and Pheo(D2) (including the corresponding Q(x) transitions, which are often claimed to be degenerate at 543 nm) and to attest that the above two assignments are most likely incorrect, we studied a large number of isolated RC preparations from spinach and wild-type Chlamydomonas reinhardtii (at different levels of intactness) as well as the Chlamydomonas reinhardtii mutant (D2-L209H), in which the active branch Pheo(D1) is genetically replaced with chlorophyll a (Chl a). We show that the Q(x)-/Q(y)-region site energies of Pheo(D1) and Pheo(D2) are ~545/680 nm and ~541.5/670 nm, respectively, in good agreement with our previous assignment [Jankowiak et al. J. Phys. Chem. B 2002, 106, 8803 - 8814]. The latter values should be used to model excitonic structure and excitation energy transfer dynamics of the PSII RCs.
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Affiliation(s)
- K Acharya
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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Jankowiak R, Reppert M, Zazubovich V, Pieper J, Reinot T. Site Selective and Single Complex Laser-Based Spectroscopies: A Window on Excited State Electronic Structure, Excitation Energy Transfer, and Electron–Phonon Coupling of Selected Photosynthetic Complexes. Chem Rev 2011; 111:4546-98. [DOI: 10.1021/cr100234j] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryszard Jankowiak
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Mike Reppert
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Valter Zazubovich
- Department of Physics, Concordia University, Montreal H4B1R6 Quebec, Canada
| | - Jörg Pieper
- Max-Volmer-Laboratories for Biophysical Chemistry, Technical University of Berlin, Germany
- Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia
| | - Tonu Reinot
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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Herascu N, Najafi M, Amunts A, Pieper J, Irrgang KD, Picorel R, Seibert M, Zazubovich V. Parameters of the protein energy landscapes of several light-harvesting complexes probed via spectral hole growth kinetics measurements. J Phys Chem B 2011; 115:2737-47. [PMID: 21391534 DOI: 10.1021/jp108775y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The parameters of barrier distributions on the protein energy landscape in the excited electronic state of the pigment/protein system have been determined by means of spectral hole burning for the lowest-energy pigments of CP43 core antenna complex and CP29 minor antenna complex of spinach Photosystem II (PS II) as well as of trimeric and monomeric LHCII complexes transiently associated with the pea Photosystem I (PS I) pool. All of these complexes exhibit sixty to several hundred times lower spectral hole burning yields as compared with molecular glassy solids previously probed by means of the hole growth kinetics measurements. Therefore, the entities (groups of atoms), which participate in conformational changes in protein, appear to be significantly larger and heavier than those in molecular glasses. No evidence of a small (∼1 cm(-1)) spectral shift tier of the spectral diffusion dynamics has been observed. Therefore, our data most likely reflect the true barrier distributions of the intact protein and not those related to the interface or surrounding host. Possible applications of the barrier distributions as well as the assignments of low-energy states of CP29 and LHCII are discussed in light of the above results.
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Affiliation(s)
- Nicoleta Herascu
- Department of Physics, Concordia University, Montreal, Quebec, Canada
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4
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Cox N, Hughes J, Rutherford A, Krausz E. On the assignment of PSHB in D1/D2/ cytb559 reaction centers. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.phpro.2010.01.227] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Purchase R, Völker S. Spectral hole burning: examples from photosynthesis. PHOTOSYNTHESIS RESEARCH 2009; 101:245-66. [PMID: 19714478 PMCID: PMC2744831 DOI: 10.1007/s11120-009-9484-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Accepted: 07/31/2009] [Indexed: 05/14/2023]
Abstract
The optical spectra of photosynthetic pigment-protein complexes usually show broad absorption bands, often consisting of a number of overlapping, "hidden" bands belonging to different species. Spectral hole burning is an ideal technique to unravel the optical and dynamic properties of such hidden species. Here, the principles of spectral hole burning (HB) and the experimental set-up used in its continuous wave (CW) and time-resolved versions are described. Examples from photosynthesis studied with hole burning, obtained in our laboratory, are then presented. These examples have been classified into three groups according to the parameters that were measured: (1) hole widths as a function of temperature, (2) hole widths as a function of delay time and (3) hole depths as a function of wavelength. Two examples from light-harvesting (LH) 2 complexes of purple bacteria are given within the first group: (a) the determination of energy-transfer times from the chromophores in the B800 ring to the B850 ring, and (b) optical dephasing in the B850 absorption band. One example from photosystem II (PSII) sub-core complexes of higher plants is given within the second group: it shows that the size of the complex determines the amount of spectral diffusion measured. Within the third group, two examples from (green) plants and purple bacteria have been chosen for: (a) the identification of "traps" for energy transfer in PSII sub-core complexes of green plants, and (b) the uncovering of the lowest k = 0 exciton-state distribution within the B850 band of LH2 complexes of purple bacteria. The results prove the potential of spectral hole burning measurements for getting quantitative insight into dynamic processes in photosynthetic systems at low temperature, in particular, when individual bands are hidden within broad absorption bands. Because of its high-resolution wavelength selectivity, HB is a technique that is complementary to ultrafast pump-probe methods. In this review, we have provided an extensive bibliography for the benefit of scientists who plan to make use of this valuable technique in their future research.
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Affiliation(s)
- Robin Purchase
- Huygens and Gorlaeus Laboratories, Leiden University, 2300 RA Leiden, The Netherlands
| | - Silvia Völker
- Huygens and Gorlaeus Laboratories, Leiden University, 2300 RA Leiden, The Netherlands
- Department of Biophysics, Faculty of Exact Sciences, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
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Schmitt FJ, Trostmann I, Theiss C, Pieper J, Renger T, Fuesers J, Hubrich EH, Paulsen H, Eichler HJ, Renger G. Excited State Dynamics in Recombinant Water-Soluble Chlorophyll Proteins (WSCP) from Cauliflower Investigated by Transient Fluorescence Spectroscopy. J Phys Chem B 2008; 112:13951-61. [DOI: 10.1021/jp8024057] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F.-J. Schmitt
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - I. Trostmann
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - C. Theiss
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - J. Pieper
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - T. Renger
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - J. Fuesers
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - E. H. Hubrich
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - H. Paulsen
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - H. J. Eichler
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
| | - G. Renger
- Institute of Optics and Atomic Physics, Berlin Institute of Technology, Berlin, Germany, Max Volmer Laboratory for Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany, Institute of General Botany, Johannes Gutenberg University Mainz, Mainz, Germany, Institute for Chemistry and Biochemistry, Free University Berlin, Berlin, Germany
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Rätsep M, Pieper J, Irrgang KD, Freiberg A. Excitation Wavelength-Dependent Electron−Phonon and Electron−Vibrational Coupling in the CP29 Antenna Complex of Green Plants. J Phys Chem B 2007; 112:110-8. [DOI: 10.1021/jp075170d] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Margus Rätsep
- Institute of Physics, and Institute of Molecular and Cell Biology, University of Tartu, Riia 142, 51014 Tartu, Estonia, Max-Volmer-Laboratories for Biophysical Chemistry, Technical University Berlin, PC14, Strasse des 17. Juni 135, 10623 Berlin, Germany, and Department of Life Science and Technology, Laboratory of Biochemistry, University of Applied Sciences, Forum Seestrasse, Seestrasse 64, 13347 Berlin, Germany
| | - Jörg Pieper
- Institute of Physics, and Institute of Molecular and Cell Biology, University of Tartu, Riia 142, 51014 Tartu, Estonia, Max-Volmer-Laboratories for Biophysical Chemistry, Technical University Berlin, PC14, Strasse des 17. Juni 135, 10623 Berlin, Germany, and Department of Life Science and Technology, Laboratory of Biochemistry, University of Applied Sciences, Forum Seestrasse, Seestrasse 64, 13347 Berlin, Germany
| | - Klaus-Dieter Irrgang
- Institute of Physics, and Institute of Molecular and Cell Biology, University of Tartu, Riia 142, 51014 Tartu, Estonia, Max-Volmer-Laboratories for Biophysical Chemistry, Technical University Berlin, PC14, Strasse des 17. Juni 135, 10623 Berlin, Germany, and Department of Life Science and Technology, Laboratory of Biochemistry, University of Applied Sciences, Forum Seestrasse, Seestrasse 64, 13347 Berlin, Germany
| | - Arvi Freiberg
- Institute of Physics, and Institute of Molecular and Cell Biology, University of Tartu, Riia 142, 51014 Tartu, Estonia, Max-Volmer-Laboratories for Biophysical Chemistry, Technical University Berlin, PC14, Strasse des 17. Juni 135, 10623 Berlin, Germany, and Department of Life Science and Technology, Laboratory of Biochemistry, University of Applied Sciences, Forum Seestrasse, Seestrasse 64, 13347 Berlin, Germany
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Pieper J, Irrgang KD, Rätsep M, Voigt J, Renger G, Small GJ. Assignment of the Lowest QY-state and Spectral Dynamics of the CP29 Chlorophyll a/b Antenna Complex of Green Plants: A Hole-burning Study ‡. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2000)0710574aotlqy2.0.co2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Krausz E, Hughes JL, Smith P, Pace R, Peterson Arsköld S. Oxygen-evolving Photosystem II core complexes: a new paradigm based on the spectral identification of the charge-separating state, the primary acceptor and assignment of low-temperature fluorescence. Photochem Photobiol Sci 2005; 4:744-53. [PMID: 16121287 DOI: 10.1039/b417905f] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We review our recent low-temperature absorption, circular dichroism (CD), magnetic CD (MCD), fluorescence and laser-selective measurements of oxygen-evolving Photosystem II (PSII) core complexes and their constituent CP 4 3, CP 47 and D1/D2/cytb(559) sub-assemblies. Quantitative comparisons reveal that neither absorption nor fluorescence spectra of core complexes are simple additive combinations of the spectra of the sub-assemblies. The absorption spectrum of the D1/D2/cytb(559) component embedded within the core complex appears significantly better structured and red-shifted compared to that of the isolated sub-assembly. A characteristic MCD reduction or 'deficit' is a useful signature for the central chlorins in the reaction centre. We note a congruence of the MCD deficit spectra of the isolated D1/D2/cytb(559) sub-assemblies to their laser-induced transient bleaches associated with P 680. A comparison of spectra of core complexes prepared from different organisms helps distinguish features due to inner light-harvesting assemblies and the central reaction-centre chlorins. Electrochromic spectral shifts in core complexes that occur following low-temperature illumination of active core complexes arise from efficient charge separation and subsequent plastoquinone anion (Q(A)(-)) formation. Such measurements allow determinations of both charge-separation efficiencies and spectral characteristics of the primary acceptor, Pheo(D1). Efficient charge separation occurs with excitation wavelengths as long as 700 nm despite the illuminations being performed at 1.7 K and with an extremely low level of incident power density. A weak, homogeneously broadened, charge-separating state of PSII lies obscured beneath the CP 47 state centered at 690 nm. We present new data in the 690-760 nm region, clearly identifying a band extending to 730 nm. Active core complexes show remarkably strong persistent spectral hole-burning activity in spectral regions attributable to CP 43 and CP 47. Measurements of homogeneous hole-widths have established that, at low temperatures, excitation transfer from these inner light-harvesting assemblies to the reaction centre occurs with approximately 70-270 ps(-1) rates, when the quinone acceptor is reduced. The rate is slower for lower-energy sub-populations of an inhomogeneously broadened antenna (trap) pigment. The complex low-temperature fluorescence behaviour seen in PSII is explicable in terms of slow excitation transfer from traps to the weak low-energy charge-separating state and transfer to the more intense reaction-centre excitations near 685 nm. The nature and origin of the charge-separating state in oxygen-evolving PSII preparations is briefly discussed.
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Affiliation(s)
- Elmars Krausz
- Research School of Chemistry, Australian National University, Canberra, Australia.
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10
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Vacha F, Psencik J, Kuty M, Durchan M, Siffel P. Evidence for localisation of accumulated chlorophyll cation on the D1-accessory chlorophyll in the reaction centre of photosystem II. PHOTOSYNTHESIS RESEARCH 2005; 84:297-302. [PMID: 16049789 DOI: 10.1007/s11120-004-6817-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2004] [Accepted: 11/25/2004] [Indexed: 05/03/2023]
Abstract
Absorption and circular dichroism spectra of Photosystem II (PS II) reaction centres (RC) were studied and compared with spectra calculated on the basis of point-dipole approximation. Chlorophyll cation was accumulated during a light treatment of PS II RC in the presence of artificial electron acceptor silicomolybdate. Light-induced difference spectra and their calculated counterparts revealed the location of accumulated cation at the accessory chlorophyll of the D1 protein subunit.
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Affiliation(s)
- Frantisek Vacha
- Institute of Physical Biology, University of South Bohemia, Zamek 136, 373 33 Nove Hrady, Czech Republic.
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11
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Croce R, Morosinotto T, Ihalainen JA, Chojnicka A, Breton J, Dekker JP, van Grondelle R, Bassi R. Origin of the 701-nm Fluorescence Emission of the Lhca2 Subunit of Higher Plant Photosystem I. J Biol Chem 2004; 279:48543-9. [PMID: 15328342 DOI: 10.1074/jbc.m408908200] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Photosystem I of higher plants is characterized by red-shifted spectral forms deriving from chlorophyll chromophores. Each of the four Lhca1 to -4 subunits exhibits a specific fluorescence emission spectrum, peaking at 688, 701, 725, and 733 nm, respectively. Recent analysis revealed the role of chlorophyll-chlorophyll interactions of the red forms in Lhca3 and Lhca4, whereas the basis for the fluorescence emission at 701 nm in Lhca2 is not yet clear. We report a detailed characterization of the Lhca2 subunit using molecular biology, biochemistry, and spectroscopy and show that the 701-nm emission form originates from a broad absorption band at 690 nm. Spectroscopy on recombinant mutant proteins assesses that this band represents the low energy form of an excitonic interaction involving two chlorophyll a molecules bound to sites A5 and B5, the same protein domains previously identified for Lhca3 and Lhca4. The resulting emission is, however, substantially shifted to higher energies. These results are discussed on the basis of the structural information that recently became available from x-ray crystallography (Ben Shem, A., Frolow, F., and Nelson, N. (2003) Nature 426, 630-635). We suggest that, within the Lhca subfamily, spectroscopic properties of chromophores are modulated by the strength of the excitonic coupling between the chromophores A5 and B5, thus yielding fluorescence emission spanning a large wavelength interval. It is concluded that the interchromophore distance rather than the transition energy of the individual chromophores or the orientation of transition vectors represents the critical factor in determining the excitonic coupling in Lhca pigment-protein complexes.
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Affiliation(s)
- Roberta Croce
- Istituto di Biofisica, CNR, Trento, c/o ITC via Sommarive 18, Povo, Trento 38100, Italy.
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Hughes JL, Prince BJ, Krausz E, Smith PJ, Pace RJ, Riesen H. Highly Efficient Spectral Hole-Burning in Oxygen-Evolving Photosystem II Preparations. J Phys Chem B 2004. [DOI: 10.1021/jp0492523] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph L. Hughes
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Barry J. Prince
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Elmars Krausz
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Paul J. Smith
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Ron J. Pace
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
| | - Hans Riesen
- Research School of Chemistry, The Australian National University, Canberra ACT 0200, Australia, Faculties Chemistry, The Australian National University, Canberra ACT 0200, Australia, and School of Physical, Environmental and Mathematical Sciences, University College, The University of New South Wales, ADFA, Canberra ACT 2600, Australia
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Riley K, Jankowiak R, Rätsep M, Small GJ, Zazubovich V. Evidence for Highly Dispersive Primary Charge Separation Kinetics and Gross Heterogeneity in the Isolated PS II Reaction Center of Green Plants. J Phys Chem B 2004. [DOI: 10.1021/jp049562l] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- K. Riley
- Ames Laboratory, USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Institute of Physics, University of Tartu, 142 Riia Street, 51014 Tartu, Estonia
| | - R. Jankowiak
- Ames Laboratory, USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Institute of Physics, University of Tartu, 142 Riia Street, 51014 Tartu, Estonia
| | - M. Rätsep
- Ames Laboratory, USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Institute of Physics, University of Tartu, 142 Riia Street, 51014 Tartu, Estonia
| | - G. J. Small
- Ames Laboratory, USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Institute of Physics, University of Tartu, 142 Riia Street, 51014 Tartu, Estonia
| | - V. Zazubovich
- Ames Laboratory, USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Institute of Physics, University of Tartu, 142 Riia Street, 51014 Tartu, Estonia
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Hsin TM, Zazubovich V, Hayes JM, Small GJ. Red Antenna States of PS I of Cyanobacteria: Stark Effect and Interstate Energy Transfer. J Phys Chem B 2004. [DOI: 10.1021/jp049572m] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T.-M. Hsin
- Department of Chemistry, Iowa State University and Ames Laboratory-USDOE, Ames, Iowa 50011
| | - V. Zazubovich
- Department of Chemistry, Iowa State University and Ames Laboratory-USDOE, Ames, Iowa 50011
| | - J. M. Hayes
- Department of Chemistry, Iowa State University and Ames Laboratory-USDOE, Ames, Iowa 50011
| | - G. J. Small
- Department of Chemistry, Iowa State University and Ames Laboratory-USDOE, Ames, Iowa 50011
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Zazubovich V, Jankowiak R, Riley K, Picorel R, Seibert M, Small GJ. How Fast Is Excitation Energy Transfer in the Photosystem II Reaction Center in the Low Temperature Limit? Hole Burning vs Photon Echo. J Phys Chem B 2003. [DOI: 10.1021/jp022231t] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- V. Zazubovich
- Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, National Renewable Energy Laboratory, Golden, Colorado 80401, and E. E. Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain
| | - R. Jankowiak
- Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, National Renewable Energy Laboratory, Golden, Colorado 80401, and E. E. Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain
| | - K. Riley
- Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, National Renewable Energy Laboratory, Golden, Colorado 80401, and E. E. Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain
| | - R. Picorel
- Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, National Renewable Energy Laboratory, Golden, Colorado 80401, and E. E. Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain
| | - M. Seibert
- Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, National Renewable Energy Laboratory, Golden, Colorado 80401, and E. E. Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain
| | - G. J. Small
- Ames Laboratory, U.S. Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, National Renewable Energy Laboratory, Golden, Colorado 80401, and E. E. Aula Dei, CSIC, Apdo. 202, 50080 Zaragoza, Spain
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16
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Jankowiak R, Rätsep M, Hayes J, Zazubovich V, Picorel R, Seibert M, Small GJ. Primary Charge-Separation Rate at 5 K in Isolated Photosystem II Reaction Centers Containing Five and Six Chlorophyll a Molecules. J Phys Chem B 2003. [DOI: 10.1021/jp021787d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. Jankowiak
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - M. Rätsep
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - J. Hayes
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - V. Zazubovich
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - R. Picorel
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - M. Seibert
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
| | - G. J. Small
- Ames Laboratory, USDOE, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, Institute of Physics, University of Tartu, 51014 Tartu, Estonia, E. E. Aula Dei (CSIC), Apdo. 202, 50080 Zaragoza, Spain, and National Renewable Energy Laboratory, Golden, Colorado 80401
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17
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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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18
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Wang J, Gosztola D, Ruffle SV, Hemann C, Seibert M, Wasielewski MR, Hille R, Gustafson TL, Sayre RT. Functional asymmetry of photosystem II D1 and D2 peripheral chlorophyll mutants of Chlamydomonas reinhardtii. Proc Natl Acad Sci U S A 2002; 99:4091-6. [PMID: 11904453 PMCID: PMC122653 DOI: 10.1073/pnas.062056899] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2001] [Accepted: 01/31/2002] [Indexed: 11/18/2022] Open
Abstract
The peripheral accessory chlorophylls (Chls) of the photosystem II (PSII) reaction center (RC) are coordinated by a pair of symmetry-related histidine residues (D1-H118 and D2-H117). These Chls participate in energy transfer from the proximal antennae complexes (CP43 and CP47) to the RC core chromophores. In addition, one or both of the peripheral Chls are redox-active and participate in a low-quantum-yield electron transfer cycle around PSII. We demonstrate that conservative mutations of the D2-H117 residue result in decreased Chl fluorescence quenching efficiency attributed to reduced accumulation of the peripheral accessory Chl cation, Chl(Z)(+). In contrast, identical symmetry-related mutations at residue D1-H118 had no effect on Chl fluorescence yield or quenching kinetics. Mutagenesis of the D2-H117 residue also altered the line width of the Chl(Z)(+) EPR signal, but the line shape of the D1-H118Q mutant remained unchanged. The D1-H118 and D2-H117 mutations also altered energy transfer properties in PSII RCs. Unlike wild type or the D1-H118Q mutant, D2-H117N RCs exhibited a reduced CD doublet in the red region of Chl absorbance band, indicative of reduced energetic coupling between P680 and the peripheral accessory Chl. In addition, transient absorption measurements of D2-H117N RCs, excited on the blue side of the Chl absorbance band, exhibited a ( approximately 400 fs) pheophytin Q(X) band bleach lifetime component not seen in wild-type or D1-H118Q RCs. The origin of this component may be related to delayed fast-energy equilibration of the excited state between the core pigments of this mutant.
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Affiliation(s)
- Jun Wang
- Department of Plant Biology, Ohio State University, Columbus, OH 43210, USA
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19
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Reinot T, Small GJ. Modeling of dispersive nonphotochemical hole growth kinetics data: Al-phthalocyanine tetrasulphonate in hyperquenched glassy water. J Chem Phys 2000. [DOI: 10.1063/1.1323228] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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20
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Jankowiak R, Zazubovich V, Rätsep M, Matsuzaki S, Alfonso M, Picorel R, Seibert M, Small GJ. The CP43 Core Antenna Complex of Photosystem II Possesses Two Quasi-Degenerate and Weakly Coupled Qy-Trap States. J Phys Chem B 2000. [DOI: 10.1021/jp0025431] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Jankowiak
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - V. Zazubovich
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - M. Rätsep
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - S. Matsuzaki
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - M. Alfonso
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - R. Picorel
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - M. Seibert
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
| | - G. J. Small
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, E. E. Aula Dei, CSIC, 50080-Zaragoza, Spain, and National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401
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21
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Matsuzaki S, Zazubovich V, Rätsep M, Hayes JM, Small GJ. Energy Transfer Kinetics and Low Energy Vibrational Structure of the Three Lowest Energy Qy-States of the Fenna−Matthews−Olson Antenna Complex. J Phys Chem B 2000. [DOI: 10.1021/jp0018495] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Matsuzaki
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - V. Zazubovich
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - M. Rätsep
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - J. M. Hayes
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - G. J. Small
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011
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22
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Pieper J, Irrgang KD, Rätsep M, Voigt J, Renger G, Small GJ. Assignment of the lowest Qy-state and spectral dynamics of the CP29 chlorophyll a/b antenna complex of green plants: a hole-burning study. Photochem Photobiol 2000; 71:574-81. [PMID: 10818788 DOI: 10.1562/0031-8655(2000)071<0574:aotlqy>2.0.co;2] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Low-temperature absorption, fluorescence and persistent non-photochemical hole-burned spectra are reported for the CP29 chlorophyll (Chl) a/b antenna complex of photosystem II of green plants. The absorption-origin band of the lowest Qy-state lies at 678.2 nm and carries a width of approximately 130 cm-1 that is dominated by inhomogeneous broadening at low temperatures. Its absorption intensity is equivalent to that of one of the six Chl a molecules of CP29. The absence of a significant satellite hole structure produced by hole burning, within the absorption band of the lowest state, indicates that the associated Chl a molecule is weakly coupled to the other Chl and, therefore, that the lowest-energy state is highly localized on a single Chl a molecule. The electron-phonon coupling of the 678.2 nm state is weak with a Huang-Rhys factor S of 0.5 and a peak phonon frequency (omega m) of approximately 20 cm-1. These values give a Stokes shift (2S omega m) in good agreement with the measured positions of the absorption band at 678.2 nm and a fluorescence-origin band at 679.1 nm. Zero-phonon holes associated with the lowest state have a width of approximately 0.05 cm-1 at 4.2 K, corresponding to a total effective dephasing time of approximately 400 ps. The temperature dependence of the zero-phonon holewidth indicates that this time constant is dominated at temperatures below 8 K by pure dephasing/spectral diffusion due to coupling of the optical transition to the glass-like two-level systems of the protein. Zero-phonon hole-widths obtained for the Chl b bands at 638.5 and 650.0 nm, at 4.2 K, lead to lower limits of 900 +/- 150 fs and 4.2 +/- 0.3 ps, respectively, for the Chl b-->Chl a energy-transfer times. Downward energy transfer from the Chl a state(s) at 665.0 nm occurs in 5.3 +/- 0.6 ps at 4.2 K.
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Affiliation(s)
- J Pieper
- Institute of Physics, Humboldt University, Berlin, Germany
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23
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Rätsep M, Johnson TW, Chitnis PR, Small GJ. The Red-Absorbing Chlorophyll a Antenna States of Photosystem I: A Hole-Burning Study of Synechocystis sp. PCC 6803 and Its Mutants. J Phys Chem B 2000. [DOI: 10.1021/jp9929418] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Rätsep
- Ames Laboratory−U.S. Department of Energy and Departments of Chemistry, and Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - T. W. Johnson
- Ames Laboratory−U.S. Department of Energy and Departments of Chemistry, and Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - P. R. Chitnis
- Ames Laboratory−U.S. Department of Energy and Departments of Chemistry, and Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
| | - G. J. Small
- Ames Laboratory−U.S. Department of Energy and Departments of Chemistry, and Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, Iowa 50011
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24
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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: 101] [Impact Index Per Article: 4.0] [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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25
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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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26
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Finzi L, Zucchelli G, Garlaschi FM, Jennings RC. Thermal sensitivity of the red absorption tail of the photosystem II reaction center complex. Biochemistry 1999; 38:10627-31. [PMID: 10451356 DOI: 10.1021/bi990568o] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The red tail of the absorption spectrum of the D1-D2-cytb559 complex, defined as the absorption signal not described by the two Gaussian sub-bands associated with the intense electronic transitions at 680 and 683 nm, exhibits anomalous temperature behavior. This tail was analyzed in the temperature interval between 80 and 300 K in terms of the mean square deviation (sigma2) of the total Qy absorption band and by Gaussian sub-band decomposition. The value of the average optical reorganization energy (Snum) obtained from the temperature dependence of sigma2 for the whole absorption band was 32 cm(-1), and changed to 16-20 cm(-1) after subtraction of the sub-bands describing the red tail. This latter value is in agreement with the hole burning literature data for chlorophyll bound to proteins, and indicates that the rather high value for the apparent optical reorganization energy obtained by analysis of the total Qy band of the D1-D2-cytb559 complex is determined by the temperature sensitivity of the red tail. This suggests that the long wavelength absorption tail might be due to vibrational transitions associated with vibrational modes in the range of 80-150 cm(-1) which are thermally accessible and give rise to an absorption signal on the low-energy side of the (0,0) transition. On the basis of this assumption, the electron-phonon coupling strength (S) for these modes is estimated to be in the range 0.028-0.18. This interpretation furthermore supports the idea that the electronic transition near 683 nm is that of a monomer chlorophyll.
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Affiliation(s)
- L Finzi
- Dipartimento di Biologia, Universita' degli Studi di Milano, Centro CNR Biologia Cellulare e Molecolare delle Piante, Italy
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27
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Rätsep M, Blankenship RE, Small GJ. Energy Transfer and Spectral Dynamics of the Three Lowest Energy Qy-States of the Fenna-Matthews-Olson Antenna Complex. J Phys Chem B 1999. [DOI: 10.1021/jp990918g] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Rätsep
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604
| | - R. E. Blankenship
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604
| | - G. J. Small
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604
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28
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F. T. H. den Hartog,, Dekker JP, van Grondelle R, Völker S. Spectral Distributions of “Trap” Pigments in the RC, CP47, and CP47−RC Complexes of Photosystem II at Low Temperature: A Fluorescence Line-Narrowing and Hole-Burning Study. J Phys Chem B 1998. [DOI: 10.1021/jp9832793] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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, and Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - 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, and Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - R. van Grondelle
- 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, and Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - 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, and Department of Biophysics, Faculty of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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