1
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Chrupková P, van Stokkum IHM, Friedrich T, Moldenhauer M, Budisa N, Tseng HW, Polívka T, Cherepanov DA, Maksimov EG, Kloz M. Raman Vibrational Signatures of Excited States of Echinenone in the Orange Carotenoid Protein (OCP) and Implications for its Photoactivation Mechanism. J Mol Biol 2024; 436:168625. [PMID: 38797429 DOI: 10.1016/j.jmb.2024.168625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 05/09/2024] [Accepted: 05/17/2024] [Indexed: 05/29/2024]
Abstract
In this study, the vibrational characteristics of optically excited echinenone in various solvents and the Orange Carotenoid Protein (OCP) in red and orange states are systematically investigated through steady-state and time-resolved spectroscopy techniques. Time-resolved experiments, employing both Transient Absorption (TA) and Femtosecond Stimulated Raman Spectroscopy (FSRS), reveal different states in the OCP photoactivation process. The time-resolved studies indicate vibrational signatures of exited states positioned above the S1 state during the initial 140 fs of carotenoid evolution in OCP, an absence of a vibrational signature for the relaxed S1 state of echinenone in OCP, and more robust signatures of a highly excited ground state (GS) in OCP. Differences in S1 state vibration population signatures between OCP and solvents are attributed to distinct conformations of echinenone in OCP and hydrogen bonds at the keto group forming a short-lived intramolecular charge transfer (ICT) state. The vibrational dynamics of the hot GS in OCP show a more pronounced red shift of ground state CC vibration compared to echinenone in solvents, thus suggesting an unusually hot form of GS. The study proposes a hypothesis for the photoactivation mechanism of OCP, emphasizing the high level of vibrational excitation in longitudinal stretching modes as a driving force. In conclusion, the comparison of vibrational signatures reveals unique dynamics of energy dissipation in OCP, providing insights into the photoactivation mechanism and highlighting the impact of the protein environment on carotenoid behavior. The study underscores the importance of vibrational analysis in understanding the intricate processes involved in early phase OCP photoactivation.
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Affiliation(s)
- Petra Chrupková
- The Extreme Light Infrastructure ERIC, ELI Beamlines Facility, Za Radnicí 835, Dolní Břežany, Czech Republic; University of South Bohemia in České Budějovice, Faculty of Science, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Ivo H M van Stokkum
- Vrije Universiteit, Department of Physics and Astronomy, Faculty of Sciences, De Boelelaan 1081, 1081HV Amsterdam, the Netherlands
| | - Thomas Friedrich
- Technische Universität Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Marcus Moldenhauer
- Technische Universität Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Nediljko Budisa
- University of Manitoba, Department of Chemistry, 144 Dysart Rd, 360 Parker Building, Winnipeg, MB R3T 2N2, Canada
| | - Hsueh-Wei Tseng
- University of Manitoba, Department of Chemistry, 144 Dysart Rd, 360 Parker Building, Winnipeg, MB R3T 2N2, Canada
| | - Tomáš Polívka
- University of South Bohemia in České Budějovice, Faculty of Science, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Dmitry A Cherepanov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 142432 Moscow, Russian Federation; Lomonosov Moscow State University, A.N. Belozersky Institute of Physical-Chemical Biology, 119991 Moscow, Russian Federation
| | - Eugene G Maksimov
- Lomonosov Moscow State University, Faculty of Biology, Vorobyovy Gory 1-12, Moscow 119991, Russian Federation
| | - Miroslav Kloz
- The Extreme Light Infrastructure ERIC, ELI Beamlines Facility, Za Radnicí 835, Dolní Břežany, Czech Republic.
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2
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Özcan E, Šímová I, Bína D, Litvín R, Polívka T. Ultrafast spectroscopy of the hydrophilic carotenoid crocin at various pH. Phys Chem Chem Phys 2024; 26:10225-10233. [PMID: 38497307 DOI: 10.1039/d4cp00665h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
This study delves into the pH-dependent effects on the excited-state behavior of crocin, a hydrophilic carotenoid with diverse functions in biological systems. Steady-state spectroscopy demonstrates notable changes in absorption and fluorescence spectra, characterized by a pH-dependent blue shift and altered resolution of vibrational bands. Transient absorption spectra further elucidate these effects, highlighting a significant blue shift in the S1-Sn peak with increasing pH. Detailed kinetic analysis shows the pH-dependent dynamics of crocin's excited states. At pH 11, a shortening of effective conjugation is observed, resulting in a prolonged S1/ICT lifetime. Conversely, at pH 9, our data suggest a more complex scenario, suggesting the presence of two distinct crocin species with different relaxation patterns. This implies structural alterations within the crocin molecule, potentially linked to the deprotonation of hydroxyl groups in crocin and/or saponification at high pH.
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Affiliation(s)
- Emrah Özcan
- Department of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
| | - Ivana Šímová
- Department of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
| | - David Bína
- Department of Chemistry, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
- Czech Academy of Sciences, Biology Centre, Institute of Plant Molecular Biology, Laboratory of Plant Biophysics and Biochemistry, České Budějovice, Czech Republic
| | - Radek Litvín
- Department of Chemistry, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
- Czech Academy of Sciences, Biology Centre, Institute of Plant Molecular Biology, Laboratory of Plant Biophysics and Biochemistry, České Budějovice, Czech Republic
| | - Tomáš Polívka
- Department of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
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3
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Kuznetsova V, Fuciman M, Polívka T. Relaxation dynamics of high-energy excited states of carotenoids studied by UV excitation and pump-repump-probe transient absorption spectroscopy. Phys Chem Chem Phys 2023; 25:22336-22344. [PMID: 37580966 DOI: 10.1039/d3cp02485g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
The excited states of carotenoids have been a subject of numerous studies. While a majority of these reports target the excited state dynamics initiated by the excitation of the S2 state, the upper excited state(s) absorbing in the UV spectral region (denoted as SUV) has been only scarcely studied. Moreover, the relation between the SUV and Sn, the final state of the well-known S1-Sn transition of carotenoids, remains unknown. To address this yet-unresolved issue, we compared the excited state dynamics of two carotenoids, namely, β-carotene and astaxanthin, after excitation of either the SUV or Sn state. The SUV state was excited directly by UV light, and the excitation of the Sn state was achieved via re-pumping the S1-Sn transition. The results indicated that direct SUV excitation produces an S1-Sn band that is significantly broader than that obtained after S2 excitation, most probably due to the generation of multiple S1 conformations produced by excess energy. No such broadening is observed if the Sn state is excited by the re-pump pulse. This shows that the Sn and SUV states are different, each initializing a specific relaxation pathway. We propose that the Sn state retains the coupled triplet pair character of the S1 state, while the SUV state is the higher state of Bu+ symmetry accessible by one-photon transition.
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Affiliation(s)
- Valentyna Kuznetsova
- Department of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
| | - Marcel Fuciman
- Department of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
| | - Tomáš Polívka
- Department of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
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4
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Özcan E, Kuznetsova V, Keşan G, Fuciman M, Litvín R, Polívka T. Ultrafast Excited States Dynamics of Metal Ion Complexes of the Carotenoid Astaxanthin. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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5
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Bondanza M, Jacquemin D, Mennucci B. Excited States of Xanthophylls Revisited: Toward the Simulation of Biologically Relevant Systems. J Phys Chem Lett 2021; 12:6604-6612. [PMID: 34251826 PMCID: PMC8311646 DOI: 10.1021/acs.jpclett.1c01929] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
Xanthophylls are a class of oxygen-containing carotenoids, which play a fundamental role in light-harvesting pigment-protein complexes and in many photoresponsive proteins. The complexity of the manifold of the electronic states and the large sensitivity to the environment still prevent a clear and coherent interpretation of their photophysics and photochemistry. In this Letter, we compare cutting-edge ab initio methods (CC3 and DMRG/NEVPT2) with time-dependent DFT and semiempirical CI (SECI) on model keto-carotenoids and show that SECI represents the right compromise between accuracy and computational cost to be applied to real xanthophylls in their biological environment. As an example, we investigate canthaxanthin in the orange carotenoid protein and show that the conical intersections between excited states and excited-ground states are mostly determined by the effective bond length alternation coordinate, which is significantly tuned by the protein through geometrical constraints and electrostatic effects.
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Affiliation(s)
- Mattia Bondanza
- Dipartimento
di Chimica e Chimica Industriale, University
of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Denis Jacquemin
- Université
de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
| | - Benedetta Mennucci
- Dipartimento
di Chimica e Chimica Industriale, University
of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
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6
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Yaroshevich IA, Maksimov EG, Sluchanko NN, Zlenko DV, Stepanov AV, Slutskaya EA, Slonimskiy YB, Botnarevskii VS, Remeeva A, Gushchin I, Kovalev K, Gordeliy VI, Shelaev IV, Gostev FE, Khakhulin D, Poddubnyy VV, Gostev TS, Cherepanov DA, Polívka T, Kloz M, Friedrich T, Paschenko VZ, Nadtochenko VA, Rubin AB, Kirpichnikov MP. Role of hydrogen bond alternation and charge transfer states in photoactivation of the Orange Carotenoid Protein. Commun Biol 2021; 4:539. [PMID: 33972665 PMCID: PMC8110590 DOI: 10.1038/s42003-021-02022-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 03/16/2021] [Indexed: 11/17/2022] Open
Abstract
Here, we propose a possible photoactivation mechanism of a 35-kDa blue light-triggered photoreceptor, the Orange Carotenoid Protein (OCP), suggesting that the reaction involves the transient formation of a protonated ketocarotenoid (oxocarbenium cation) state. Taking advantage of engineering an OCP variant carrying the Y201W mutation, which shows superior spectroscopic and structural properties, it is shown that the presence of Trp201 augments the impact of one critical H-bond between the ketocarotenoid and the protein. This confers an unprecedented homogeneity of the dark-adapted OCP state and substantially increases the yield of the excited photoproduct S*, which is important for the productive photocycle to proceed. A 1.37 Å crystal structure of OCP Y201W combined with femtosecond time-resolved absorption spectroscopy, kinetic analysis, and deconvolution of the spectral intermediates, as well as extensive quantum chemical calculations incorporating the effect of the local electric field, highlighted the role of charge-transfer states during OCP photoconversion. Yaroshevich et al. present a chemical reaction mechanism of a 35-kDa blue light-triggered photoreceptor, the Orange Carotenoid Protein (OCP). They find that photoactivation critically involves the transient formation of a protonated ketocarotenoid (oxocarbenium cation) state. This study suggests the role of charge-transfer states during OCP photoconversion.
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Affiliation(s)
- Igor A Yaroshevich
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Eugene G Maksimov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia. .,A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia.
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Dmitry V Zlenko
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Alexey V Stepanov
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Ekaterina A Slutskaya
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Yury B Slonimskiy
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Viacheslav S Botnarevskii
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Alina Remeeva
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Ivan Gushchin
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Kirill Kovalev
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institut de Biologie Structurale J.-P. Ebel, Université Grenoble Alpes-CEA-CNRS, Grenoble, France.,Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich, Jülich, Germany.,Institute of Crystallography, RWTH Aachen University, Aachen, Germany
| | - Valentin I Gordeliy
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institut de Biologie Structurale J.-P. Ebel, Université Grenoble Alpes-CEA-CNRS, Grenoble, France.,Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich, Jülich, Germany
| | - Ivan V Shelaev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Fedor E Gostev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | | | | | - Timofey S Gostev
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Dmitry A Cherepanov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia.,A.N. Belozersky Institute of Physical-Chemical Biology, Moscow State University, Moscow, Russia
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Miroslav Kloz
- ELI-Beamlines, Institute of Physics, Praha, Czech Republic
| | - Thomas Friedrich
- Technische Universität Berlin, Institute of Chemistry PC14, Berlin, Germany
| | | | - Victor A Nadtochenko
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Andrew B Rubin
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Mikhail P Kirpichnikov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
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7
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Khan T, Litvín R, Šebelík V, Polívka T. Excited-State Evolution of Keto-Carotenoids after Excess Energy Excitation in the UV Region. Chemphyschem 2021; 22:471-480. [PMID: 33373476 DOI: 10.1002/cphc.202000982] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 12/23/2020] [Indexed: 11/10/2022]
Abstract
Carotenoids are molecules with rich photophysics that are in many biological systems involved in photoprotection. Yet, their response to excess energy excitation is only scarcely studied. Here we have explored excited state properties of three keto-carotenoids, echinenone, canthaxanthin and rhodoxanthin after excess energy excitation to a singlet state absorbing in UV. Though the basic spectral features and kinetics of S2 , hot S1 , relaxed S1 states remain unchanged upon UV excitation, the clear increase of the S* signal is observed after excess energy excitation, associated with increased S* lifetime. A multiple origin of the S* signal, originating either from specific conformations in the S1 state or from a non-equilibrated ground state, is confirmed in this work. We propose that the increased amount of energy stored in molecular vibrations, induced by the UV excitation, is the reason for the enhanced S* signal observed after UV excitation. Our data also suggest that a fraction of the UV excited state population may proceed through a non-sequential pathway, bypassing the S2 state.
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Affiliation(s)
- Tuhin Khan
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Radek Litvín
- Institute of Chemistry, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic.,Biology Centre, Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic
| | - Václav Šebelík
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
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8
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Papageorgiou M, Tselios C, Varotsis C. Photoreduction of carotenoids in the aerobic anoxygenic photoheterotrophs probed by real time Raman spectroscopy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2020; 213:112069. [PMID: 33152639 DOI: 10.1016/j.jphotobiol.2020.112069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 11/28/2022]
Abstract
The Aerobic anoxygenic phototrophic bacteria (AAPB) Roseobacter denitrificans and Roseobacter litoralis are widespread in the bacterioplankton community with a particular role in the marine carbon cycle. Measurements of carotenoids isolated from dark-grown cells indicated the presence of spheroidenone (SO, N = 11) and of 3,4 dihydrospheroidenone (N = 10) in the carotenoids isolated from illuminated cells. Time-dependent Raman 514 nm excitation experiments of R. denitrificans and R. litoralis cells grown under illumination demonstrated that v1 (C=C) of SO exhibits a time-dependent substantial frequency upshift relative to its frequency in the dark-grown cells, in a manner resembling shorting the conjugation length (N). We suggest that the irreversible dark-SO to light- 3,4 dihydrospheroidenone transition observed in the intact carotenoids of R. denitrificans and R. litoralis cells is an operative photoreduction strategy of SO containing AAPB that affects the energy transfer mechanism.
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Affiliation(s)
- Marios Papageorgiou
- Department of Chemical Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - Charalampos Tselios
- Department of Chemical Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - Constantinos Varotsis
- Department of Chemical Engineering, Cyprus University of Technology, Limassol, Cyprus.
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9
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Gurchiek JK, Rose JB, Guberman-Pfeffer MJ, Tilluck RW, Ghosh S, Gascón JA, Beck WF. Fluorescence Anisotropy Detection of Barrier Crossing and Ultrafast Conformational Dynamics in the S 2 State of β-Carotene. J Phys Chem B 2020; 124:9029-9046. [PMID: 32955881 DOI: 10.1021/acs.jpcb.0c06961] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carotenoids are usually only weakly fluorescent despite being very strong absorbers in the mid-visible region because their first two excited singlet states, S1 and S2, have very short lifetimes. To probe the structural mechanisms that promote the nonradiative decay of the S2 state to the S1 state, we have carried out a series of fluorescence lineshape and anisotropy measurements with a prototype carotenoid, β-carotene, in four aprotic solvents. The anisotropy values observed in the fluorescence emission bands originating from the S2 and S1 states reveal that the large internal rotations of the emission transition dipole moment, as much as 50° relative to that of the absorption transition dipole moment, are initiated during ultrafast evolution on the S2 state potential energy surface and persist upon nonradiative decay to the S1 state. Electronic structure calculations of the orientation of the transition dipole moment account for the anisotropy results in terms of torsional and pyramidal distortions near the center of the isoprenoid backbone. The excitation wavelength dependence of the fluorescence anisotropy indicates that these out-of-plane conformational motions are initiated by passage over a low-activation energy barrier from the Franck-Condon S2 structure. This conclusion is consistent with detection over the 80-200 K range of a broad, red-shifted fluorescence band from a dynamic intermediate evolving on a steep gradient of the S2 state potential energy surface after crossing the activation barrier. The temperature dependence of the oscillator strength and anisotropy indicate that nonadiabatic passage from S2 through a conical intersection seam to S1 is promoted by the out-of-plane motions of the isoprenoid backbone with strong hindrance by solvent friction.
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Affiliation(s)
- J K Gurchiek
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Justin B Rose
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Matthew J Guberman-Pfeffer
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06268-1712, United States
| | - Ryan W Tilluck
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
| | - Soumen Ghosh
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan, Lombardy 20133, Italy
| | - José A Gascón
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06268-1712, United States
| | - Warren F Beck
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, Michigan 48824, United States
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10
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Khan T, Dominguez-Martin MA, Šímová I, Fuciman M, Kerfeld CA, Polívka T. Excited-State Properties of Canthaxanthin in Cyanobacterial Carotenoid-Binding Proteins HCP2 and HCP3. J Phys Chem B 2020; 124:4896-4905. [DOI: 10.1021/acs.jpcb.0c03137] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tuhin Khan
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Maria Agustina Dominguez-Martin
- Environmental Genomics and Systems Biology and Molecular Biophysics and Integrated Bioimaging Divisions, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Ivana Šímová
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Marcel Fuciman
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Cheryl A. Kerfeld
- Environmental Genomics and Systems Biology and Molecular Biophysics and Integrated Bioimaging Divisions, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
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11
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Staleva-Musto H, Kuznetsova V, Bína D, Litvín R, Polívka T. Intramolecular charge-transfer state of carotenoids siphonaxanthin and siphonein: function of non-conjugated acyl-oxy group. PHOTOSYNTHESIS RESEARCH 2020; 144:127-135. [PMID: 31802367 DOI: 10.1007/s11120-019-00694-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
We used ultrafast transient absorption spectroscopy to study excited-state dynamics of two keto-carotenoids, siphonaxanthin and siphonein. These two carotenoids differ in the presence of dodecanoyl-oxy group in siphonein, which is attached to the C19 carbon on the same side of the molecule as the conjugated keto group. We show that this dodecanoyl-oxy group, though not in conjugation, is still capable of modifying excited state properties. While spectroscopic properties of siphonein and siphonaxanthin are nearly identical in a non-polar solvent, they become markedly different in polar solvents. In a polar solvent, siphonein, having the dodecanoyl-oxy moiety, exhibits less pronounced vibrational bands in the absorption spectrum and has significantly enhanced characteristic features of an intramolecular charge-transfer (ICT) state in transient absorption spectra compared to siphonaxanthin. The presence of the dodecanoyl-oxy moiety also alters the lifetimes of the S1/ICT state. For siphonaxanthin, the lifetimes are 60, 20, and 14 ps in n-hexane, acetonitrile, and methanol, whereas for siphonein these lifetimes yield 60, 11, and 10 ps. Thus, we show that even a non-conjugated functional group can affect the charge-transfer character of the S1/ICT state. By comparison with fucoxanthin acyl-oxy derivatives, we show that position of the acyl-oxy group in respect to the conjugated keto group is the key feature determining whether the polarity-dependent behavior is enhanced or suppressed.
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Affiliation(s)
- Hristina Staleva-Musto
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Valentyna Kuznetsova
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - David Bína
- Institute of Chemistry, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
- Biology Centre, Czech Academy of Sciences, Institute of Plant Molecular Biology, České Budějovice, Czech Republic
| | - Radek Litvín
- Institute of Chemistry, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
- Biology Centre, Czech Academy of Sciences, Institute of Plant Molecular Biology, České Budějovice, Czech Republic
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic.
- Biology Centre, Czech Academy of Sciences, Institute of Plant Molecular Biology, České Budějovice, Czech Republic.
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12
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Kuznetsova V, Dominguez-Martin MA, Bao H, Gupta S, Sutter M, Kloz M, Rebarz M, Přeček M, Chen Y, Petzold CJ, Ralston CY, Kerfeld CA, Polívka T. Comparative ultrafast spectroscopy and structural analysis of OCP1 and OCP2 from Tolypothrix. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2020; 1861:148120. [PMID: 31734194 PMCID: PMC6943196 DOI: 10.1016/j.bbabio.2019.148120] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 10/09/2019] [Accepted: 11/04/2019] [Indexed: 01/12/2023]
Abstract
The orange carotenoid protein (OCP) is a structurally and functionally modular photoactive protein involved in cyanobacterial photoprotection. Recently, based on bioinformatic analysis and phylogenetic relationships, new families of OCP have been described, OCP2 and OCPx. The first characterization of the OCP2 showed both faster photoconversion and back-conversion, and lower fluorescence quenching of phycobilisomes relative to the well-characterized OCP1. Moreover, OCP2 is not regulated by the fluorescence recovery protein (FRP). In this work, we present a comprehensive study combining ultrafast spectroscopy and structural analysis to compare the photoactivation mechanisms of OCP1 and OCP2 from Tolypothrix PCC 7601. We show that despite significant differences in their functional characteristics, the spectroscopic properties of OCP1 and OCP2 are comparable. This indicates that the OCP functionality is not directly related to the spectroscopic properties of the bound carotenoid. In addition, the structural analysis by X-ray footprinting reveals that, overall, OCP1 and OCP2 have grossly the same photoactivation mechanism. However, the OCP2 is less reactive to radiolytic labeling, suggesting that the protein is less flexible than OCP1. This observation could explain fast photoconversion of OCP2.
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Affiliation(s)
- Valentyna Kuznetsova
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | | | - Han Bao
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Sayan Gupta
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Markus Sutter
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA; Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Miroslav Kloz
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
| | - Mateusz Rebarz
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
| | - Martin Přeček
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
| | - Yan Chen
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Christopher J Petzold
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Corie Y Ralston
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Cheryl A Kerfeld
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA; Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
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13
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Götze JP. Vibrational Relaxation in Carotenoids as an Explanation for Their Rapid Optical Properties. J Phys Chem B 2019; 123:2203-2209. [PMID: 30779570 DOI: 10.1021/acs.jpcb.8b09841] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We propose the ultrafast S2 (1Bu) to S1 (2Ag) "electronic internal conversion" observed in carotenoids to be a vibrational relaxation of the 1Bu state. This suggestion arises from comparing excited-state geometries computed with the CAM-B3LYP density functional to the ground states; it is found that each conjugated atom moves less than 5 pm in, for example, violaxanthin. However, the changes of excitation energies are large, ranging from 0.4 to 1.2 eV. This is connected to the size of the conjugated system: while each atom contributes only 0.02-0.06 eV, the sum amounts to the observed shift. Additional analysis of computational data is provided from new or already published calculations. As the mechanism may be valid for all linear polyenes, the model has implications that go beyond the presented case of carotenoids. Finally, four sets of experimental data on carotenoids published elsewhere are reinterpreted. The model predicts near-infrared (IR) absorptions and transient femtosecond IR spectra within 0.1 eV accuracy.
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Affiliation(s)
- Jan P Götze
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie , Freie Universität Berlin , Takustr. 3 14195 Berlin , Germany
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14
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Taffet EJ, Scholes GD. Peridinin Torsional Distortion and Bond-Length Alternation Introduce Intramolecular Charge-Transfer and Correlated Triplet Pair Intermediate Excited States. J Phys Chem B 2018; 122:5835-5844. [DOI: 10.1021/acs.jpcb.8b02504] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Elliot J. Taffet
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Gregory D. Scholes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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15
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Staleva-Musto H, Kuznetsova V, West RG, Keşan G, Minofar B, Fuciman M, Bína D, Litvín R, Polívka T. Nonconjugated Acyloxy Group Deactivates the Intramolecular Charge-Transfer State in the Carotenoid Fucoxanthin. J Phys Chem B 2018; 122:2922-2930. [PMID: 29469573 DOI: 10.1021/acs.jpcb.8b00743] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We used ultrafast transient absorption spectroscopy to study excited-state dynamics of the keto-carotenoid fucoxanthin (Fx) and its two derivatives: 19'-butanoyloxyfucoxanthin (bFx) and 19'-hexanoyloxyfucoxanthin (hFx). These derivatives occur in some light-harvesting systems of photosynthetic microorganisms, and their presence is typically related to stress conditions. Even though the hexanoyl (butanoyl) moiety is not a part of the conjugated system of hFx (bFx), their absorption spectra in polar solvents exhibit more pronounced vibrational bands of the S2 state than for Fx. The effect of the nonconjugated acyloxy moiety is further observed in transient absorption spectra, which for Fx exhibit characteristic features of an intramolecular charge transfer (ICT) state in all polar solvents. For bFx and hFx, however, much weaker ICT features are detected in methanol, and the spectral markers of the ICT state disappear completely in polar, but aprotic acetonitrile. The presence of the acyloxy moiety also alters the lifetimes of the S1/ICT state. For Fx, the lifetimes are 60, 30, and 20 ps in n-hexane, acetonitrile, and methanol, whereas for bFx and hFx, these lifetimes yield 60, 60, and 40 ps, respectively. Testing the S1/ICT state lifetimes of hFx in other solvents revealed that some ICT features can be induced only in polar, protic solvents (methanol, ethanol, and ethylene glycol). Thus, bFx and hFx represent a rather rare example of a system in which a nonconjugated functional group significantly alters excited-state dynamics. By comparison with other carotenoids, we show that a keto group at the acyloxy tail, even though it is not in conjugation, affects the electron distribution along the conjugated backbone, resulting in the observed decrease of the ICT character of the S1/ICT state of bFx and hFx.
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Affiliation(s)
- Hristina Staleva-Musto
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic
| | - Valentyna Kuznetsova
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic
| | - Robert G West
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic
| | - Gürkan Keşan
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic.,Department of Chemistry, Faculty of Science , Gebze Technical University , 41400 Gebze , Kocaeli , Turkey
| | - Babak Minofar
- Center for Nanobiology and Structural Biology, Institute of Microbiology , Czech Academy of Sciences , CZ 373 33 Nové Hrady , Czech Republic
| | - Marcel Fuciman
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic
| | - David Bína
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic.,Institute of Plant Molecular Biology, Biological Centre , Czech Academy of Sciences , CZ 370 05 České Budějovice , Czech Republic
| | - Radek Litvín
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic.,Institute of Plant Molecular Biology, Biological Centre , Czech Academy of Sciences , CZ 370 05 České Budějovice , Czech Republic
| | - Tomáš Polívka
- Institute of Physics and Biophysics, Faculty of Science , University of South Bohemia , Branišovská 1760 , CZ 370 05 České Budějovice , Czech Republic.,Institute of Plant Molecular Biology, Biological Centre , Czech Academy of Sciences , CZ 370 05 České Budějovice , Czech Republic
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16
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Šlouf V, Keşan G, Litvín R, Swainsbury DJK, Martin EC, Hunter CN, Polívka T. Carotenoid to bacteriochlorophyll energy transfer in the RC-LH1-PufX complex from Rhodobacter sphaeroides containing the extended conjugation keto-carotenoid diketospirilloxanthin. PHOTOSYNTHESIS RESEARCH 2018; 135:33-43. [PMID: 28528494 DOI: 10.1007/s11120-017-0397-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
RC-LH1-PufX complexes from a genetically modified strain of Rhodobacter sphaeroides that accumulates carotenoids with very long conjugation were studied by ultrafast transient absorption spectroscopy. The complexes predominantly bind the carotenoid diketospirilloxanthin, constituting about 75% of the total carotenoids, which has 13 conjugated C=C bonds, and the conjugation is further extended to two terminal keto groups. Excitation of diketospirilloxanthin in the RC-LH1-PufX complex demonstrates fully functional energy transfer from diketospirilloxanthin to BChl a in the LH1 antenna. As for other purple bacterial LH complexes having carotenoids with long conjugation, the main energy transfer route is via the S2-Qx pathway. However, in contrast to LH2 complexes binding diketospirilloxanthin, in RC-LH1-PufX we observe an additional, minor energy transfer pathway associated with the S1 state of diketospirilloxanthin. By comparing the spectral properties of the S1 state of diketospirilloxanthin in solution, in LH2, and in RC-LH1-PufX, we propose that the carotenoid-binding site in RC-LH1-PufX activates the ICT state of diketospirilloxanthin, resulting in the opening of a minor S1/ICT-mediated energy transfer channel.
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Affiliation(s)
- Václav Šlouf
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic
| | - Gürkan Keşan
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic
| | - Radek Litvín
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic
- Biological Centre, Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic
| | - David J K Swainsbury
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, S10 2TN, UK
| | - Elizabeth C Martin
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, S10 2TN, UK
| | - C Neil Hunter
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, S10 2TN, UK
| | - Tomáš Polívka
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic.
- Biological Centre, Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic.
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17
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Spezia R, Knecht S, Mennucci B. Excited state characterization of carbonyl containing carotenoids: a comparison between single and multireference descriptions. Phys Chem Chem Phys 2018. [PMID: 28636682 DOI: 10.1039/c7cp02941a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Carotenoids can play multiple roles in biological photoreceptors thanks to their rich photophysics. In the present work, we have investigated six of the most common carbonyl containing carotenoids: echinenone, canthaxanthin, astaxanthin, fucoxanthin, capsanthin and capsorubin. Their excitation properties are investigated by means of a hybrid density functional theory (DFT) and multireference configuration interaction (MRCI) approach to elucidate the role of the carbonyl group: the bright transition is of ππ* character, as expected, but the presence of a C[double bond, length as m-dash]O moiety reduces the energy of nπ* transitions which may become closer to the ππ* transition, in particular as the conjugation chain decreases. This can be related to the presence of a low-lying charge transfer state typical of short carbonyl-containing carotenoids. The DFT/MRCI results are finally used to benchmark single-reference time-dependent DFT-based methods: among the investigated functionals, the meta-GGA (and in particular M11L and MN12L) functionals show to perform the best for all six investigated systems.
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Affiliation(s)
- Riccardo Spezia
- LAMBE, Université d'Evry Val d'Essonne, CEA, CNRS, Université Paris Saclay, F-91025 Evry, France.
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18
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A new energy transfer channel from carotenoids to chlorophylls in purple bacteria. Nat Commun 2017; 8:71. [PMID: 28694423 PMCID: PMC5504074 DOI: 10.1038/s41467-017-00120-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 06/01/2017] [Indexed: 11/17/2022] Open
Abstract
It is unclear whether there is an intermediate dark state between the S2 and S1 states of carotenoids. Previous two-dimensional electronic spectroscopy measurements support its existence and its involvement in the energy transfer from carotenoids to chlorophylls, but there is still considerable debate on the origin of this dark state and how it regulates the energy transfer process. Here we use ab initio calculations on excited-state dynamics and simulated two-dimensional electronic spectrum of carotenoids from purple bacteria to provide evidence supporting that the dark state may be assigned to a new Ag+ state. Our calculations also indicate that groups on the conjugation backbone of carotenoids may substantially affect the excited-state levels and the energy transfer process. These results contribute to a better understanding of carotenoid excited states. Carotenoids harvest energy from light and transfer it to chlorophylls during photosynthesis. Here, Feng et al. perform ab initio calculations on excited-state dynamics and simulated 2D electronic spectrum of carotenoids, supporting the existence of a new excited state in carotenoids.
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19
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Kuznetsova V, Chábera P, Litvín R, Polívka T, Fuciman M. Effect of Isomerization on Excited-State Dynamics of Carotenoid Fucoxanthin. J Phys Chem B 2017; 121:4438-4447. [DOI: 10.1021/acs.jpcb.7b02526] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Valentyna Kuznetsova
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Pavel Chábera
- Division
of Chemical Physics, Lund University, P.O. Box 124, Lund SE-22100, Sweden
| | - Radek Litvín
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
- Institute
of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic
| | - Tomáš Polívka
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
- Institute
of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic
| | - Marcel Fuciman
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
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20
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Kosumi D, Kajikawa T, Sakaguchi K, Katsumura S, Hashimoto H. Excited state properties of β-carotene analogs incorporating a lactone ring. Phys Chem Chem Phys 2017; 19:3000-3009. [PMID: 28079227 DOI: 10.1039/c6cp06828f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carotenoids possessing a carbonyl group along their polyene backbone exhibit unique excited state properties due to the occurrence of intramolecular charge transfer (ICT) in the excited state. In fact, the ICT characteristics of naturally occurring carbonyl carotenoids play an essential role in the highly efficient energy transfer that proceeds in aquatic photosynthetic antenna systems. In the present study, we synthesized two short-chain polyene carotenoids incorporating a lactone ring, denoted as BL-7 and BL-8, having seven and eight conjugated double bonds (n = 7 and 8), respectively. The excited state properties of these compounds were directly compared to those of their non-carbonyl counterparts to clarify the role of the carbonyl group in the generation of ICT. The energies of the optically allowed S2 states for BL-7 and BL-8 were found to be more than 0.3 eV (2400 cm-1) below those of non-carbonyl short β-carotene homologs. Ultrafast spectroscopic data demonstrated various solvent polarity-induced effects, including the appearance of stimulated emission in the near-IR region in the case of BL-7, and significant lifetime shortening of the lowest-lying singlet S1 excited states of both BL-7 and BL-8. These results suggest that these compounds exhibit ICT characteristics.
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Affiliation(s)
- Daisuke Kosumi
- Institute of Pulsed Power Science, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.
| | - Takayuki Kajikawa
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kazuhiko Sakaguchi
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Shigeo Katsumura
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan and Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hideki Hashimoto
- Department of Applied Chemistry for Environment, Faculty of Science and Technology, Kwansei Gakuin University, Japan.
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21
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Šlouf V, Kuznetsova V, Fuciman M, de Carbon CB, Wilson A, Kirilovsky D, Polívka T. Ultrafast spectroscopy tracks carotenoid configurations in the orange and red carotenoid proteins from cyanobacteria. PHOTOSYNTHESIS RESEARCH 2017; 131:105-117. [PMID: 27612863 DOI: 10.1007/s11120-016-0302-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 08/30/2016] [Indexed: 06/06/2023]
Abstract
A quenching mechanism mediated by the orange carotenoid protein (OCP) is one of the ways cyanobacteria protect themselves against photooxidative stress. Here, we present a femtosecond spectroscopic study comparing OCP and RCP (red carotenoid protein) samples binding different carotenoids. We confirmed significant changes in carotenoid configuration upon OCP activation reported by Leverenz et al. (Science 348:1463-1466. doi: 10.1126/science.aaa7234 , 2015) by comparing the transient spectra of OCP and RCP. The most important marker of these changes was the magnitude of the transient signal associated with the carotenoid intramolecular charge-transfer (ICT) state. While OCP with canthaxanthin exhibited a weak ICT signal, it increased significantly for canthaxanthin bound to RCP. On the contrary, a strong ICT signal was recorded in OCP binding echinenone excited at the red edge of the absorption spectrum. Because the carbonyl oxygen responsible for the appearance of the ICT signal is located at the end rings of both carotenoids, the magnitude of the ICT signal can be used to estimate the torsion angles of the end rings. Application of two different excitation wavelengths to study OCP demonstrated that the OCP sample contains two spectroscopically distinct populations, none of which is corresponding to the photoactivated product of OCP.
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Affiliation(s)
- Václav Šlouf
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Valentyna Kuznetsova
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Marcel Fuciman
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Céline Bourcier de Carbon
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France
- Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191, Gif-sur-Yvette, France
| | - Adjélé Wilson
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France
- Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191, Gif-sur-Yvette, France
| | - Diana Kirilovsky
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France
- Institut de Biologie et Technologies de Saclay (iBiTec-S), Commissariat à l'Energie Atomique (CEA), 91191, Gif-sur-Yvette, France
| | - Tomáš Polívka
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic.
- Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic.
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22
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Ghosh S, Bishop MM, Roscioli JD, LaFountain AM, Frank HA, Beck WF. Femtosecond Heterodyne Transient Grating Studies of Nonradiative Deactivation of the S2 (11Bu+) State of Peridinin: Detection and Spectroscopic Assignment of an Intermediate in the Decay Pathway. J Phys Chem B 2016; 120:3601-14. [DOI: 10.1021/acs.jpcb.5b12753] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soumen Ghosh
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
| | - Michael M. Bishop
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
| | - Jerome D. Roscioli
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
| | - Amy M. LaFountain
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3036 United States
| | - Harry A. Frank
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3036 United States
| | - Warren F. Beck
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322 United States
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23
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Greco JA, LaFountain AM, Kinashi N, Shinada T, Sakaguchi K, Katsumura S, Magdaong NCM, Niedzwiedzki DM, Birge RR, Frank HA. Spectroscopic Investigation of the Carotenoid Deoxyperidinin: Direct Observation of the Forbidden S0 → S1 Transition. J Phys Chem B 2016; 120:2731-44. [DOI: 10.1021/acs.jpcb.6b00439] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Jordan A. Greco
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Amy M. LaFountain
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Naoto Kinashi
- Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Tetsuro Shinada
- Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kazuhiko Sakaguchi
- Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Shigeo Katsumura
- Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Nikki Cecil M. Magdaong
- Department
of Biology, Washington University in Saint Louis, One Brookings
Drive, St. Louis, Missouri 63130, United States
| | - Dariusz M. Niedzwiedzki
- Photosynthetic
Antenna Research Center, Washington University in Saint Louis, One Brookings
Drive, St. Louis, Missouri 63130, United States
| | - Robert R. Birge
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Harry A. Frank
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
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24
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Otsuka M, Mori Y, Takano K. Theoretical study on photophysical properties of 3′-hydroxyechinenone and the effects of interactions with orange carotenoid protein. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.01.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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25
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Ghosh S, Bishop MM, Roscioli JD, Mueller JJ, Shepherd NC, LaFountain AM, Frank HA, Beck WF. Femtosecond Heterodyne Transient-Grating Studies of Nonradiative Decay of the S2 (11Bu+) State of β-Carotene: Contributions from Dark Intermediates and Double-Quantum Coherences. J Phys Chem B 2015; 119:14905-24. [DOI: 10.1021/acs.jpcb.5b09405] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Soumen Ghosh
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Michael M. Bishop
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Jerome D. Roscioli
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Jenny Jo Mueller
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Nolan C. Shepherd
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Amy M. LaFountain
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Harry A. Frank
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Warren F. Beck
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
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26
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Keşan G, Durchan M, Tichý J, Minofar B, Kuznetsova V, Fuciman M, Šlouf V, Parlak C, Polívka T. Different Response of Carbonyl Carotenoids to Solvent Proticity Helps To Estimate Structure of the Unknown Carotenoid from Chromera velia. J Phys Chem B 2015; 119:12653-63. [PMID: 26362118 DOI: 10.1021/acs.jpcb.5b08152] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In order to estimate the possible structure of the unknown carbonyl carotenoid related to isofucoxanthin from Chromera velia denoted as isofucoxanthin-like carotenoid (Ifx-l), we employed steady-state and ultrafast time-resolved spectroscopic techniques to investigate spectroscopic properties of Ifx-l in various solvents. The results were compared with those measured for related carotenoids with known structure: fucoxanthin (Fx) and isofucoxanthin (Ifx). The experimental data were complemented by quantum chemistry calculations and molecular modeling. The data show that Ifx-l must have longer effective conjugation length than Ifx. Yet, the magnitude of polarity-dependent changes in Ifx-l is larger than for Ifx, suggesting significant differences in structure of these two carotenoids. The most interesting spectroscopic feature of Ifx-l is its response to solvent proticity. The transient absorption data show that (1) the magnitude of the ICT-like band of Ifx-l in acetonitrile is larger than in methanol and (2) the S1/ICT lifetime of Ifx-l in acetonitrile, 4 ps, is markedly shorter than in methanol (10 ps). This is opposite behavior than for Fx and Ifx whose S1/ICT lifetimes are always shorter in protic solvent methanol (20 and 13 ps) than in aprotic acetonitrile (30 and 17 ps). Comparison with other carbonyl carotenoids reported earlier showed that proticity response of Ifx-l is consistent with presence of a conjugated lactone ring. Combining the experimental data and quantum chemistry calculations, we estimated a possible structure of Ifx-l.
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Affiliation(s)
- Gürkan Keşan
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Milan Durchan
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic.,Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences , České Budějovice, Czech Republic
| | - Josef Tichý
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic.,Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences , České Budějovice, Czech Republic
| | - Babak Minofar
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic.,Center for Nanobiology and Structural Biology, Institute of Microbiology and Global Change Research Center, Academy of Sciences of the Czech Republic , Nové Hrady, Czech Republic
| | - Valentyna Kuznetsova
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Marcel Fuciman
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Václav Šlouf
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Cemal Parlak
- Department of Physics, Dumlupınar University , Kütahya, Turkey
| | - Tomáš Polívka
- Institute of Physics and Biophysics, Faculty of Science, University of South Bohemia , Branišovská 1760, 37005 České Budějovice, Czech Republic.,Institute of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences , České Budějovice, Czech Republic
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27
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Götze JP, Karasulu B, Patil M, Thiel W. Vibrational relaxation as the driving force for wavelength conversion in the peridinin-chlorophyll a-protein. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:1509-17. [PMID: 26231454 DOI: 10.1016/j.bbabio.2015.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/21/2015] [Accepted: 07/25/2015] [Indexed: 11/29/2022]
Abstract
We present a computationally derived energy transfer model for the peridinin-chlorophyll a-protein (PCP), which invokes vibrational relaxation in the two lowest singlet excited states rather than internal conversion between them. The model allows an understanding of the photoinduced processes without assuming further electronic states or a dependence of the 2Ag state character on the vibrational sub-state. We report molecular dynamics simulations (CHARMM22 force field) and quantum mechanics/molecular mechanics (QM/MM) calculations on PCP. In the latter, the QM region containing a single peridinin (Per) chromophore or a Per-Chl a (chlorophyll a) pair is treated by density functional theory (DFT, CAM-B3LYP) for geometries and by DFT-based multireference configuration interaction (DFT/MRCI) for excitation energies. The calculations show that Per has a bright, green light absorbing 2Ag state, in addition to the blue light absorbing 1Bu state found in other carotenoids. Both states undergo a strong energy lowering upon relaxation, leading to emission in the red, while absorbing in the blue or green. The orientation of their transition dipole moments indicates that both states are capable of excited-state energy transfer to Chl a, without preference for either 1Bu or 2Ag as donor state. We propose that the commonly postulated partial intramolecular charge transfer (ICT) character of a donating Per state can be assigned to the relaxed 1Bu state, which takes on ICT character. By assuming that both 1Bu and 2Ag are able to donate to the Chl a Q band, one can explain why different chlorophyll species in PCP exhibit different acceptor capabilities.
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Affiliation(s)
- Jan P Götze
- School of Chemistry, North Haugh, University of St Andrews, St Andrews, Fife KY16 9ST, UK.
| | - Bora Karasulu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Mahendra Patil
- Center for Excellence in Basic Sciences, University of Mumbai, Mumbai 400098, Maharashtra, India
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
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28
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Di Donato M, Ragnoni E, Lapini A, Foggi P, Hiller RG, Righini R. Femtosecond transient infrared and stimulated Raman spectroscopy shed light on the relaxation mechanisms of photo-excited peridinin. J Chem Phys 2015; 142:212409. [DOI: 10.1063/1.4915072] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Carbonera D, Di Valentin M, Spezia R, Mezzetti A. The unique photophysical properties of the Peridinin-Chlorophyll-α-Protein. Curr Protein Pept Sci 2015; 15:332-50. [PMID: 24678668 PMCID: PMC4030626 DOI: 10.2174/1389203715666140327111139] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 11/22/2013] [Accepted: 03/16/2014] [Indexed: 11/22/2022]
Abstract
Peridinin-Chlorophyll-a-Proteins (PCPs) are water-soluble light harvesting complexes from dinoflagellates.
They have unique light-harvesting and energy transfer properties which have been studied in details in the last 15 years.
This review aims to give an overview on all the main aspects of PCPs photophysics, with an emphasis on some aspects
which have not been reviewed in details so far, such as vibrational spectroscopy studies, theoretical calculations, and
magnetic resonance studies. A paragraph on the present development of PCPs towards technological applications is also
included.
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Affiliation(s)
| | | | | | - Alberto Mezzetti
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
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30
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Niedzwiedzki DM, Cranston L. Excited state lifetimes and energies of okenone and chlorobactene, exemplary keto and non-keto aryl carotenoids. Phys Chem Chem Phys 2015; 17:13245-56. [DOI: 10.1039/c5cp00836k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Photophysical properties of two typical aryl carotenoids, okenone and chlorobactene, were studied with application of femtosecond and microsecond time-resolved absorption spectroscopies.
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Affiliation(s)
- Dariusz M. Niedzwiedzki
- Photosynthetic Antenna Research Center and Department of Chemistry
- Washington University in St Louis
- USA
| | - Laura Cranston
- Institute of Molecular Cell and Systems Biology
- College of Medical
- Veterinary and Life Sciences
- University of Glasgow
- Glasgow Biomedical Research Centre
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31
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Ragnoni E, Di Donato M, Iagatti A, Lapini A, Righini R. Mechanism of the Intramolecular Charge Transfer State Formation in all-trans-β-Apo-8′-carotenal: Influence of Solvent Polarity and Polarizability. J Phys Chem B 2014; 119:420-32. [DOI: 10.1021/jp5093288] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elena Ragnoni
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Mariangela Di Donato
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino (Florence), Italy
| | - Alessandro Iagatti
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Andrea Lapini
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino (Florence), Italy
| | - Roberto Righini
- LENS (European
Laboratory for Non-Linear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (Florence) Italy
- INO (Istituto
Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino (Florence), Italy
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32
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Rahmalia W, Fabre JF, Usman T, Mouloungui Z. Aprotic solvents effect on the UV-visible absorption spectra of bixin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 131:455-460. [PMID: 24840486 DOI: 10.1016/j.saa.2014.03.119] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 03/09/2014] [Accepted: 03/29/2014] [Indexed: 06/03/2023]
Abstract
We describe here the effects of aprotic solvents on the spectroscopic characteristics of bixin. Bixin was dissolved in dimethyl sulfoxide, acetone, dichloromethane, ethyl acetate, chloroform, dimethyl carbonate, cyclohexane and hexane, separately, and its spectra in the resulting solutions were determined by UV-visible spectrophotometry at normal pressure and room temperature. We analyzed the effect of aprotic solvents on λmax according to Onsager cavity model and Hansen theory, and determined the approximate absorption coefficient with the Beer-Lambert law. We found that the UV-visible absorption spectra of bixin were found to be solvent dependent. The S0→S2 transition energy of bixin in solution was dependent principally on the refractive index of the solvents and the bixin-solvent dispersion interaction. There was a small influence of the solvents dielectric constant, permanent dipole interaction and hydrogen bonding occurred between bixin and solvents. The absorbance of bixin in various solvents, with the exception of hexane, increased linearly with concentration.
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Affiliation(s)
- Winda Rahmalia
- Université de Toulouse, INP-ENSIACET, LCA (Laboratoire de Chimie Agro-industrielle), 4 Allée Emile Monso, CS 44362, 31030 Toulouse Cedex 4, France; Departement of Chemistry, Mathematic and Natural Science, Tanjungpura University, Jl. Ahmad Yani, Pontianak 78124, West Kalimantan, Indonesia
| | - Jean-François Fabre
- Université de Toulouse, INP-ENSIACET, LCA (Laboratoire de Chimie Agro-industrielle), 4 Allée Emile Monso, CS 44362, 31030 Toulouse Cedex 4, France
| | - Thamrin Usman
- Departement of Chemistry, Mathematic and Natural Science, Tanjungpura University, Jl. Ahmad Yani, Pontianak 78124, West Kalimantan, Indonesia
| | - Zéphirin Mouloungui
- Université de Toulouse, INP-ENSIACET, LCA (Laboratoire de Chimie Agro-industrielle), 4 Allée Emile Monso, CS 44362, 31030 Toulouse Cedex 4, France; INRA, UMR 1010 CAI, F-31030 Toulouse, France.
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33
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Dean JC, Kusaka R, Walsh PS, Allais F, Zwier TS. Plant Sunscreens in the UV-B: Ultraviolet Spectroscopy of Jet-Cooled Sinapoyl Malate, Sinapic Acid, and Sinapate Ester Derivatives. J Am Chem Soc 2014; 136:14780-95. [PMID: 25295994 DOI: 10.1021/ja5059026] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jacob C. Dean
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Ryoji Kusaka
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Patrick S. Walsh
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Florent Allais
- AgroParisTech, Chaire Agro-Biotechnologies
Industrielles (ABI), 247
rue Paul Vaillant-Couturier, F-51100 Reims, France
- AgroParisTech, UMR 782 GMPA, Site de Grignon, F-78850 Thiverval-Grignon, France
- INRA, UMR 782 GMPA, Site de Grignon, F-78850 Thiverval-Grignon, France
| | - Timothy S. Zwier
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
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34
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Magdaong N, LaFountain AM, Greco JA, Gardiner AT, Carey AM, Cogdell RJ, Gibson GN, Birge RR, Frank HA. High efficiency light harvesting by carotenoids in the LH2 complex from photosynthetic bacteria: unique adaptation to growth under low-light conditions. J Phys Chem B 2014; 118:11172-89. [PMID: 25171303 PMCID: PMC4174993 DOI: 10.1021/jp5070984] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 08/26/2014] [Indexed: 12/03/2022]
Abstract
Rhodopin, rhodopinal, and their glucoside derivatives are carotenoids that accumulate in different amounts in the photosynthetic bacterium, Rhodoblastus (Rbl.) acidophilus strain 7050, depending on the intensity of the light under which the organism is grown. The different growth conditions also have a profound effect on the spectra of the bacteriochlorophyll (BChl) pigments that assemble in the major LH2 light-harvesting pigment-protein complex. Under high-light conditions the well-characterized B800-850 LH2 complex is formed and accumulates rhodopin and rhodopin glucoside as the primary carotenoids. Under low-light conditions, a variant LH2, denoted B800-820, is formed, and rhodopinal and rhodopinal glucoside are the most abundant carotenoids. The present investigation compares and contrasts the spectral properties and dynamics of the excited states of rhodopin and rhodopinal in solution. In addition, the systematic differences in pigment composition and structure of the chromophores in the LH2 complexes provide an opportunity to explore the effect of these factors on the rate and efficiency of carotenoid-to-BChl energy transfer. It is found that the enzymatic conversion of rhodopin to rhodopinal by Rbl. acidophilus 7050 grown under low-light conditions results in nearly 100% carotenoid-to-BChl energy transfer efficiency in the LH2 complex. This comparative analysis provides insight into how photosynthetic systems are able to adapt and survive under challenging environmental conditions.
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Affiliation(s)
- Nikki
M. Magdaong
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Amy M. LaFountain
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jordan A. Greco
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Alastair T. Gardiner
- Institute
of Molecular Cell and Systems Biology, University
of Glasgow, Glasgow G12 8TA, Scotland
| | - Anne-Marie Carey
- Institute
of Molecular Cell and Systems Biology, University
of Glasgow, Glasgow G12 8TA, Scotland
| | - Richard J. Cogdell
- Institute
of Molecular Cell and Systems Biology, University
of Glasgow, Glasgow G12 8TA, Scotland
| | - George N. Gibson
- Department
of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Robert R. Birge
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Harry A. Frank
- Department
of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
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35
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Di Donato M, Segado Centellas M, Lapini A, Lima M, Avila F, Santoro F, Cappelli C, Righini R. Combination of transient 2D-IR experiments and ab initio computations sheds light on the formation of the charge-transfer state in photoexcited carbonyl carotenoids. J Phys Chem B 2014; 118:9613-30. [PMID: 25050938 DOI: 10.1021/jp505473j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited state dynamics of carbonyl carotenoids is very complex because of the coupling of single- and doubly excited states and the possible involvement of intramolecular charge-transfer (ICT) states. In this contribution we employ ultrafast infrared spectroscopy and theoretical computations to investigate the relaxation dynamics of trans-8'-apo-β-carotenal occurring on the picosecond time scale, after excitation in the S2 state. In a (slightly) polar solvent like chloroform, one-dimensional (T1D-IR) and two-dimensional (T2D-IR) transient infrared spectroscopy reveal spectral components with characteristic frequencies and lifetimes that are not observed in nonpolar solvents (cyclohexane). Combining experimental evidence with an analysis of CASPT2//CASSCF ground and excited state minima and energy profiles, complemented with TDDFT calculations in gas phase and in solvent, we propose a photochemical decay mechanism for this system where only the bright single-excited 1Bu(+) and the dark double-excited 2Ag(-) states are involved. Specifically, the initially populated 1Bu(+) relaxes toward 2Ag(-) in 200 fs. In a nonpolar solvent 2Ag(-) decays to the ground state (GS) in 25 ps. In polar solvents, distortions along twisting modes of the chain promote a repopulation of the 1Bu(+) state which then quickly relaxes to the GS (18 ps in chloroform). The 1Bu(+) state has a high electric dipole and is the main contributor to the charge-transfer state involved in the dynamics in polar solvents. The 2Ag(-) → 1Bu(+) population transfer is evidenced by a cross peak on the T2D-IR map revealing that the motions along the same stretching of the conjugated chain on the 2Ag(-) and 1Bu(+) states are coupled.
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Affiliation(s)
- Mariangela Di Donato
- LENS (European Laboratory for Nonlinear Spectroscopy) via N. Carrara 1, 50019 Sesto Fiorentino (FI), Italy
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36
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Kosumi D, Fujii R, Sugisaki M, Oka N, Iha M, Hashimoto H. Characterization of the intramolecular transfer state of marine carotenoid fucoxanthin by femtosecond pump-probe spectroscopy. PHOTOSYNTHESIS RESEARCH 2014; 121:61-68. [PMID: 24676808 DOI: 10.1007/s11120-014-9995-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 03/06/2014] [Indexed: 06/03/2023]
Abstract
Fucoxanthin, containing a carbonyl group in conjugation with its polyene backbone, is a naturally occurring pigment in marine organisms and is essential to the photosynthetic light-harvesting function in brown alga and diatom. Fucoxanthin exhibits optical characteristics attributed to an intramolecular charge transfer (ICT) state that arises in polar environments due to the presence of the carbonyl group. In this study, we report the spectroscopic properties of fucoxanthin in methanol (polar and protic solvent) observed by femtosecond pump-probe measurements in the near-infrared region, where transient absorption associated with the optically allowed S2 (1(1)B u (+) ) state and stimulated emission from the strongly coupled S1/ICT state were observed following one-photon excitation to the S2 state. The results showed that the amplitude of the stimulated emission of the S1/ICT state increased with decreasing excitation energy, demonstrating that the fucoxanthin form associated with the lower energy of the steady-state absorption exhibits stronger ICT character.
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Affiliation(s)
- Daisuke Kosumi
- The Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan,
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37
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De Re E, Schlau-Cohen GS, Leverenz RL, Huxter VM, Oliver TAA, Mathies RA, Fleming GR. Insights into the structural changes occurring upon photoconversion in the orange carotenoid protein from broadband two-dimensional electronic spectroscopy. J Phys Chem B 2014; 118:5382-9. [PMID: 24779893 DOI: 10.1021/jp502120h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Carotenoids play an essential role in photoprotection, interacting with other pigments to safely dissipate excess absorbed energy as heat. In cyanobacteria, the short time scale photoprotective mechanisms involve the photoactive orange carotenoid protein (OCP), which binds a single carbonyl carotenoid. Blue-green light induces the photoswitching of OCP from its ground state form (OCPO) to a metastable photoproduct (OCPR). OCPR can bind to the phycobilisome antenna and induce fluorescence quenching. The photoswitching is accompanied by structural and functional changes at the level of the protein and of the bound carotenoid. Here, we use broadband two-dimensional electronic spectroscopy to study the differences in excited state dynamics of the carotenoid in the two forms of OCP. Our results provide insight into the origin of the pronounced vibrational lineshape and oscillatory dynamics observed in linear absorption and 2D electronic spectroscopy of OCPO and the large inhomogeneous broadening in OCPR, with consequences for the chemical function of the two forms.
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Affiliation(s)
- Eleonora De Re
- Applied Science and Technology Graduate Group, University of California , Berkeley, California 94720, United States
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38
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Niedzwiedzki DM. Photophysical properties of a synthetic, carbonyl-containing (N=6+CO) carotenoid analogue. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Kosumi D, Kajikawa T, Okumura S, Sugisaki M, Sakaguchi K, Katsumura S, Hashimoto H. Elucidation and Control of an Intramolecular Charge Transfer Property of Fucoxanthin by a Modification of Its Polyene Chain Length. J Phys Chem Lett 2014; 5:792-797. [PMID: 26274069 DOI: 10.1021/jz5000287] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Fucoxanthin is an essential pigment for the highly efficient light-harvesting function of marine algal photosynthesis. It exhibits excited state properties attributed to intramolecular charge transfer (ICT) in polar environments due to the presence of the carbonyl group in its polyene backbone. This report describes the excited state properties of fucoxanthin homologues with four to eight conjugated double bonds in various solvents using the femtosecond pump-probe technique. The results clarified that fucoxanthin homologues with longer polyene chains did not possess pronounced ICT spectroscopic signatures, while the shorter fucoxanthin homologues had a strong ICT character, even in a nonpolar solvent. On the basis of the observations, we quantitatively correlated the ICT character in the excited state to the conjugated polyene chain lengths of fucoxanthin molecules.
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Affiliation(s)
- Daisuke Kosumi
- †Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Takayuki Kajikawa
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Satoshi Okumura
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Mitsuru Sugisaki
- §Department of Physics, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kazuhiko Sakaguchi
- ∥Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Shigeo Katsumura
- ‡Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Hideki Hashimoto
- †Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
- §Department of Physics, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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40
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Coccia E, Varsano D, Guidoni L. Ab Initio Geometry and Bright Excitation of Carotenoids: Quantum Monte Carlo and Many Body Green's Function Theory Calculations on Peridinin. J Chem Theory Comput 2014; 10:501-6. [PMID: 26580027 PMCID: PMC4864508 DOI: 10.1021/ct400943a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this letter, we report the singlet ground state structure of the full carotenoid peridinin by means of variational Monte Carlo (VMC) calculations. The VMC relaxed geometry has an average bond length alternation of 0.1165(10) Å, larger than the values obtained by DFT (PBE, B3LYP, and CAM-B3LYP) and shorter than that calculated at the Hartree-Fock (HF) level. TDDFT and EOM-CCSD calculations on a reduced peridinin model confirm the HOMO-LUMO major contribution of the Bu(+)-like (S2) bright excited state. Many Body Green's Function Theory (MBGFT) calculations of the vertical excitation energy of the Bu(+)-like state for the VMC structure (VMC/MBGFT) provide an excitation energy of 2.62 eV, in agreement with experimental results in n-hexane (2.72 eV). The dependence of the excitation energy on the bond length alternation in the MBGFT and TDDFT calculations with different functionals is discussed.
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Affiliation(s)
- Emanuele Coccia
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell’Aquila, via Vetoio, 67110 L’Aquila, Italy
| | - Daniele Varsano
- S3 Center, CNR Institute of Nanoscience, Via Campi 213/A, 41125 Modena, Italy
| | - Leonardo Guidoni
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell’Aquila, via Vetoio, 67110 L’Aquila, Italy
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41
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Abstract
C29-peridinin is a synthetic analogue of the important, naturally-occurring carotenoid, peridinin, found in several marine algal species. C29-peridinin has five conjugated carbon-carbon double bonds compared to eight possessed by peridinin and also lacks the methyl group functionalities typically present along the polyene chain of carotenoids. These structural modifications lead to unique excited state properties and important insights regarding the factors controlling the photophysics of peridinin and other carbonyl-containing carotenoids, which are critical components of the light-harvesting systems of many photosynthetic organisms.
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42
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Berera R, Gwizdala M, van Stokkum IHM, Kirilovsky D, van Grondelle R. Excited States of the Inactive and Active Forms of the Orange Carotenoid Protein. J Phys Chem B 2013; 117:9121-8. [DOI: 10.1021/jp307420p] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rudi Berera
- Division of Physics and Astronomy, Department of Biophysics, VU University, Amsterdam, The Netherlands
| | - Michal Gwizdala
- Commissariat a l’Energie Atomique, Institute de Biologie et Tecnologie de Saclay
- Centre National de la Recherce Scientifique, 91191 Gif sur Yvette, France
| | - Ivo H. M. van Stokkum
- Division of Physics and Astronomy, Department of Biophysics, VU University, Amsterdam, The Netherlands
| | - Diana Kirilovsky
- Commissariat a l’Energie Atomique, Institute de Biologie et Tecnologie de Saclay
- Centre National de la Recherce Scientifique, 91191 Gif sur Yvette, France
| | - Rienk van Grondelle
- Division of Physics and Astronomy, Department of Biophysics, VU University, Amsterdam, The Netherlands
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43
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Gao F, Wang X, Li H, Ye X. New two-photon absorption organic chromophores containing imino and hydroxyl groups: synthesis, ESIPT and chemosensors. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.121] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Niedzwiedzki DM, Kajikawa T, Aoki K, Katsumura S, Frank HA. Excited States Energies and Dynamics of Peridinin Analogues and the Nature of the Intramolecular Charge Transfer State in Carbonyl-Containing Carotenoids. J Phys Chem B 2013; 117:6874-87. [DOI: 10.1021/jp400038k] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dariusz M. Niedzwiedzki
- Photosynthetic Antenna Research
Center, Washington University in St Louis, Saint Louis, Missouri 63130, United States
| | - Takayuki Kajikawa
- Department of Chemistry, Kwansei Gakuin University, 669-1337, Hyogo, Japan
| | - Kazuyoshi Aoki
- Department of Chemistry, Kwansei Gakuin University, 669-1337, Hyogo, Japan
| | - Shigeo Katsumura
- Department of Chemistry, Kwansei Gakuin University, 669-1337, Hyogo, Japan
| | - Harry A. Frank
- Department of Chemistry, University of Connecticut, U-3060, 55 North Eagleville
Road, Storrs, Connecticut 06269-3060, United States
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45
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Wagner NL, Greco JA, Enriquez MM, Frank HA, Birge RR. The nature of the intramolecular charge transfer state in peridinin. Biophys J 2013; 104:1314-25. [PMID: 23528091 DOI: 10.1016/j.bpj.2013.01.045] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/18/2013] [Accepted: 01/28/2013] [Indexed: 12/17/2022] Open
Abstract
Experimental and theoretical evidence is presented that supports the theory that the intramolecular charge transfer (ICT) state of peridinin is an evolved state formed via excited-state bond-order reversal and solvent reorganization in polar media. The ICT state evolves in <100 fs and is characterized by a large dipole moment (~35 D). The charge transfer character involves a shift of electron density within the polyene chain, and it does not involve participation of molecular orbitals localized in either of the β-rings. Charge is moved from the allenic side of the polyene into the furanic ring region and is accompanied by bond-order reversal in the central portion of the polyene chain. The electronic properties of the ICT state are generated via mixing of the "1(1)Bu(+)" ionic state and the lowest-lying "2(1)Ag(-)" covalent state. The resulting ICT state is primarily (1)Bu(+)-like in character and exhibits not only a large oscillator strength but an unusually large doubly excited character. In most solvents, two populations exist in equilibrium, one with a lowest-lying ICT ionic state and a second with a lowest-lying "2(1)Ag(-)" covalent state. The two populations are separated by a small barrier associated with solvent relaxation and cavity formation.
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Affiliation(s)
- Nicole L Wagner
- Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT, USA
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46
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Carotenoid–protein interaction alters the S1 energy of hydroxyechinenone in the Orange Carotenoid Protein. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2013; 1827:248-54. [DOI: 10.1016/j.bbabio.2012.10.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 10/04/2012] [Accepted: 10/08/2012] [Indexed: 11/19/2022]
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47
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Christensen RL, Enriquez MM, Wagner NL, Peacock-Villada AY, Scriban C, Schrock RR, Polívka T, Frank HA, Birge RR. Energetics and dynamics of the low-lying electronic states of constrained polyenes: implications for infinite polyenes. J Phys Chem A 2013; 117:1449-65. [PMID: 23330819 DOI: 10.1021/jp310592s] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Steady-state and ultrafast transient absorption spectra were obtained for a series of conformationally constrained, isomerically pure polyenes with 5-23 conjugated double bonds (N). These data and fluorescence spectra of the shorter polyenes reveal the N dependence of the energies of six (1)B(u)(+) and two (1)A(g)(-) excited states. The (1)B(u)(+) states converge to a common infinite polyene limit of 15,900 ± 100 cm(-1). The two excited (1)A(g)(-) states, however, exhibit a large (~9000 cm(-1)) energy difference in the infinite polyene limit, in contrast to the common value previously predicted by theory. EOM-CCSD ab initio and MNDO-PSDCI semiempirical MO theories account for the experimental transition energies and intensities. The complex, multistep dynamics of the 1(1)B(u)(+) → 2(1)A(g)(-) → 1(1)A(g)(-) excited state decay pathways as a function of N are compared with kinetic data from several natural and synthetic carotenoids. Distinctive transient absorption signals in the visible region, previously identified with S* states in carotenoids, also are observed for the longer polyenes. Analysis of the lifetimes of the 2(1)A(g)(-) states, using the energy gap law for nonradiative decay, reveals remarkable similarities in the N dependence of the 2(1)A(g)(-) decay kinetics of the carotenoid and polyene systems. These findings are important for understanding the mechanisms by which carotenoids carry out their roles as light-harvesting molecules and photoprotective agents in biological systems.
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48
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Durchan M, Fuciman M, Šlouf V, Keşan G, Polívka T. Excited-State Dynamics of Monomeric and Aggregated Carotenoid 8′-Apo-β-carotenal. J Phys Chem A 2012; 116:12330-8. [DOI: 10.1021/jp310140k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Milan Durchan
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská
31, České Budějovice, Czech Republic
| | - Marcel Fuciman
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská
31, České Budějovice, Czech Republic
| | - Václav Šlouf
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská
31, České Budějovice, Czech Republic
| | - Gürkan Keşan
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská
31, České Budějovice, Czech Republic
| | - Tomáš Polívka
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská
31, České Budějovice, Czech Republic
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49
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Šlouf V, Fuciman M, Dulebo A, Kaftan D, Koblížek M, Frank HA, Polívka T. Carotenoid charge transfer states and their role in energy transfer processes in LH1-RC complexes from aerobic anoxygenic phototrophs. J Phys Chem B 2012; 117:10987-99. [PMID: 23130956 DOI: 10.1021/jp309278y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Light-harvesting complexes ensure necessary flow of excitation energy into photosynthetic reaction centers. In the present work, transient absorption measurements were performed on LH1-RC complexes isolated from two aerobic anoxygenic phototrophs (AAPs), Roseobacter sp. COL2P containing the carotenoid spheroidenone, and Erythrobacter sp. NAP1 which contains the carotenoids zeaxanthin and bacteriorubixanthinal. We show that the spectroscopic data from the LH1-RC complex of Roseobacter sp. COL2P are very similar to those previously reported for Rhodobacter sphaeroides, including the transient absorption spectrum originating from the intramolecular charge-transfer (ICT) state of spheroidenone. Although the ICT state is also populated in LH1-RC complexes of Erythrobacter sp. NAP1, its appearance is probably related to the polarity of the bacteriorubixanthinal environment rather than to the specific configuration of the carotenoid, which we hypothesize is responsible for populating the ICT state of spheroidenone in LH1-RC of Roseobacter sp. COL2P. The population of the ICT state enables efficient S1/ICT-to-bacteriochlorophyll (BChl) energy transfer which would otherwise be largely inhibited for spheroidenone and bacteriorubixanthinal due to their low energy S1 states. In addition, the triplet states of these carotenoids appear well-tuned for efficient quenching of singlet oxygen or BChl-a triplets, which is of vital importance for oxygen-dependent organisms such as AAPs.
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Affiliation(s)
- Václav Šlouf
- Faculty of Science, University of South Bohemia , Branišovská 31, 370 05 České Budějovice, Czech Republic
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50
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Macernis M, Sulskus J, Duffy CDP, Ruban AV, Valkunas L. Electronic Spectra of Structurally Deformed Lutein. J Phys Chem A 2012; 116:9843-53. [DOI: 10.1021/jp304363q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mindaugas Macernis
- Theoretical Physics Department,
Faculty of Physics, Vilnius University,
Saulėtekio al. 9, LT-10222 Vilnius, Lithuania
- Center for Physical Sciences and Technology, Savanorių 231, LT-02300
Vilnius, Lithuania
| | - Juozas Sulskus
- Theoretical Physics Department,
Faculty of Physics, Vilnius University,
Saulėtekio al. 9, LT-10222 Vilnius, Lithuania
| | - Christopher D. P. Duffy
- School
of Biological and Chemical
Sciences, Queen Mary University of London, Mile End Road, London E1 4TN, U.K
| | - Alexander V. Ruban
- School
of Biological and Chemical
Sciences, Queen Mary University of London, Mile End Road, London E1 4TN, U.K
| | - Leonas Valkunas
- Theoretical Physics Department,
Faculty of Physics, Vilnius University,
Saulėtekio al. 9, LT-10222 Vilnius, Lithuania
- Center for Physical Sciences and Technology, Savanorių 231, LT-02300
Vilnius, Lithuania
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