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Knox PP, Lukashev EP, Korvatovsky BN, Mamedov MD, Strakhovskaya MG, Gvozdev DA, Paschenko VZ, Rubin AB. The influence of cationic antiseptics on the processes of light energy conversion in various photosynthetic pigment-protein complexes. Photosynth Res 2024:10.1007/s11120-024-01082-w. [PMID: 38466457 DOI: 10.1007/s11120-024-01082-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 01/29/2024] [Indexed: 03/13/2024]
Abstract
The widespread use of disinfectants and antiseptics, and consequently their release into the environment, determines the relevance of studying their potential impact on the main producers of organic matter on the planet-photosynthetic organisms. The review examines the effects of some biguanides and quaternary ammonium compounds, octenidine, miramistin, chlorhexidine, and picloxidine, on the functioning of the photosynthetic apparatus of various organisms (Strakhovskaya et al. in Photosynth Res 147:197-209, 2021; Knox et al. in Photosynth Res 153:103, 2022; Paschenko et al. in Photosynth Res 155:93-105, 2023a, Photosynth Res 2023b). A common feature of these antiseptics is the combination of hydrophobic and hydrophilic regions in the molecules, the latter carrying a positive charge(s). The comparison of the results obtained with intact bacterial membrane vesicles (chromatophores) and purified pigment-protein complexes (photosystem II and I) of oxygenic organisms allows us to draw conclusions about the mechanisms of the cationic antiseptic action on the functional properties of the components of the photosynthetic apparatus.
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Affiliation(s)
- Peter P Knox
- Biophysical Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 24, Moscow, Russia, 119234
| | - Eugene P Lukashev
- Biophysical Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 24, Moscow, Russia, 119234
| | - Boris N Korvatovsky
- Biophysical Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 24, Moscow, Russia, 119234
| | - Mahir D Mamedov
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory 1, Build. 40, Moscow, Russia, 119992
| | - Marina G Strakhovskaya
- Synthetic Biology Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Daniil A Gvozdev
- Biophysical Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 24, Moscow, Russia, 119234.
| | - Vladimir Z Paschenko
- Biophysical Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 24, Moscow, Russia, 119234
| | - Andrew B Rubin
- Biophysical Department, Faculty of Biology, Moscow State University, Leninskye Gory 1, Build. 24, Moscow, Russia, 119234
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Paschenko VZ, Lukashev EP, Mamedov MD, Gvozdev DA, Knox PP. Effect of cationic antiseptics on fluorescent characteristics and electron transfer in cyanobacterial photosystem I complexes. Photosynth Res 2024; 159:241-251. [PMID: 37480468 DOI: 10.1007/s11120-023-01039-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 07/09/2023] [Indexed: 07/24/2023]
Abstract
In this study, the effects of cationic antiseptics such as chlorhexidine, picloxidine, miramistin, and octenidine at concentrations up to 150 µM on fluorescence spectra and its lifetimes, as well as on light-induced electron transfer in protein-pigment complexes of photosystem I (PSI) isolated from cyanobacterium Synechocystis sp. PCC 6803 have been studied. In doing so, octenidine turned out to be the most "effective" in terms of its influence on the spectral and functional characteristics of PSI complexes. It has been shown that the rate of energy migration from short-wavelength forms of light-harvesting chlorophyll to long-wavelength ones slows down upon addition of octenidine to the PSI suspension. After photo-separation of charges between the primary electron donor P700 and the terminal iron-sulfur center(s) FA/FB, the rate of forward electron transfer from (FA/FB)- to the external medium slows down while the rate of charge recombination between reduced FA/FB- and photooxidized P700+ increases. The paper considers the possible causes of the observed action of the antiseptic.
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Affiliation(s)
- Vladimir Z Paschenko
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Eugene P Lukashev
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Mahir D Mamedov
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory 1, Build. 40, Moscow, Russia, 119992
| | - Daniil A Gvozdev
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234.
| | - Peter P Knox
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
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Belyaeva NE, Bulychev AA, Klementiev KE, Paschenko VZ, Riznichenko GY, Rubin AB. Comparative modeling of fluorescence and P700 induction kinetics for alga Scenedesmus sp. obliques and cyanobacterium Synechocystis sp. PCC 6803. Role of state 2-state 1 transitions and redox state of plastoquinone pool. Cell Biochem Biophys 2024:10.1007/s12013-024-01224-w. [PMID: 38340281 DOI: 10.1007/s12013-024-01224-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 01/24/2024] [Indexed: 02/12/2024]
Abstract
The model of thylakoid membrane system (T-M model) (Belyaeva et al. Photosynth Res 2019, 140:1-19) has been improved in order to analyze the induction data for dark-adapted samples of algal (Scenedesmus obliques) and cyanobacterial (Synechocystis sp. PCC 6803) cells. The fluorescence induction (FI) curves of Scenedesmus were measured at light exposures of 5 min, while FI and P700 redox transformations of Synechocystis were recorded in parallel for 100 s intervals. Kinetic data comprising the OJIP-SMT fluorescence induction and OABCDEF P700+ absorbance changes were used to study the processes underlying state transitions qT2→1 and qT1→2 associated with the increase/decrease in Chl fluorescence emission. A formula with the Hill kinetics (Ebenhöh et al. Philos Trans R Soc B 2014, 369:20130223) was introduced into the T-M model, with a new variable to imitate the flexible size of antenna AntM(t) associated with PSII. Simulations revealed that the light-harvesting capacity of PSII increases with a corresponding decrease for that of PSI upon the qT2→1 transition induced by plastoquinone (PQ) pool oxidation. The complete T-M model fittings were attained on Scenedesmus or Synechocystis fast waves OJIPS of FI, while SMT wave of FI was reproduced at intervals shorter than 5 min. Also the fast P700 redox transitions (OABC) for Synechocystis were fitted exactly. Reasonable sets of algal and cyanobacterial electron/proton transfer (ET/PT) parameters were found. In the case of Scenedesmus, ET/PT traits remained the same irrespective of modeling with or without qT2→1 transitions. Simulations indicated a high extent (20%) of the PQ pool reduction under dark conditions in Synechocystis compared to 2% in Scenedesmus.
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Affiliation(s)
- N E Belyaeva
- Biological Faculty, Moscow State University, Moscow, 119234, Russia.
| | - A A Bulychev
- Biological Faculty, Moscow State University, Moscow, 119234, Russia
| | - K E Klementiev
- Biological Faculty, Moscow State University, Moscow, 119234, Russia
- Biological Faculty, Shenzhen MSU-BIT University, Shenzhen, 518172, China
| | - V Z Paschenko
- Biological Faculty, Moscow State University, Moscow, 119234, Russia
| | - G Yu Riznichenko
- Biological Faculty, Moscow State University, Moscow, 119234, Russia
| | - A B Rubin
- Biological Faculty, Moscow State University, Moscow, 119234, Russia
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Paschenko VZ, Lukashev EP, Mamedov MD, Korvatovskiy BN, Knox PP. Influence of the antiseptic octenidine on spectral characteristics and energy migration processes in photosystem II core complexes. Photosynth Res 2023; 155:93-105. [PMID: 36335236 PMCID: PMC9638271 DOI: 10.1007/s11120-022-00972-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Herein, the effect of cationic antiseptics (chlorhexidine, picloxidine, miramistin, octenidine) on the initial processes of the delivery of light energy and its efficient use by the reaction centers in intact spinach photosystem II core complexes has been investigated. The characteristic effects-an increase in the fluorescence yield of light-harvesting pigments and a slowdown in the rate of energy migration in bacterial photosynthetic chromatophores has been recently demonstrated mainly in the presence of octenidine (Strakhovskaya et al., in Photosynth Res 147:197-209, 2021; Knox et al., in Photosynth Res, https://doi.org/10.1007/s11120-022-00909-8 , 2022). In this study, we also observed that in the presence of octenidine, the fluorescence intensity of photosystem II core complexes increases by 5-10 times, and the rate of energy migration from antennae to the reaction centers decreases by 3 times. In addition, with an increase in the concentration of this antiseptic, a new effect related to a shift of the spectrum, absorption and fluorescence to the short-wavelength region has been found. Similar effects were observed when detergent Triton X-100 was added to photosystem II samples. We concluded that the antiseptic primarily affects the structure of the internal light-harvesting antenna (CP43 and CP47), through which the excitation energy is delivered to the reaction center. As a result of such an impact, the chlorophyll molecules in this structure are destabilized and their optical and functional characteristics change.
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Affiliation(s)
- Vladimir Z Paschenko
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Eugene P Lukashev
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Mahir D Mamedov
- A.N.Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory 1, Build. 40, Moscow, Russia, 119992
| | - Boris N Korvatovskiy
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Peter P Knox
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234.
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Knox PP, Lukashev EP, Korvatovskiy BN, Strakhovskaya MG, Makhneva ZK, Bol'shakov MA, Paschenko VZ. Disproportionate effect of cationic antiseptics on the quantum yield and fluorescence lifetime of bacteriochlorophyll molecules in the LH1-RC complex of R. rubrum chromatophores. Photosynth Res 2022; 153:103-112. [PMID: 35277801 DOI: 10.1007/s11120-022-00909-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 02/26/2022] [Indexed: 06/14/2023]
Abstract
Photosynthetic membrane complexes of purple bacteria are convenient and informative macromolecular systems for studying the mechanisms of action of various physicochemical factors on the functioning of catalytic proteins both in an isolated state and as part of functional membranes. In this work, we studied the effect of cationic antiseptics (chlorhexidine, picloxydine, miramistin, and octenidine) on the fluorescence intensity and the efficiency of energy transfer from the light-harvesting LH1 complex to the reaction center (RC) of Rhodospirillum rubrum chromatophores. The effect of antiseptics on the fluorescence intensity and the energy transfer increased in the following order: chlorhexidine, picloxydine, miramistin, octenidine. The most pronounced changes in the intensity and lifetime of fluorescence were observed with the addition of miramistin and octenidine. At the same concentration of antiseptics, the increase in fluorescence intensity was 2-3 times higher than the increase in its lifetime. It is concluded that the addition of antiseptics decreases the efficiency of the energy migration LH1 → RC and increases the fluorescence rate constant kfl. We associate the latter with a change in the polarization of the microenvironment of bacteriochlorophyll molecules upon the addition of charged antiseptic molecules. A possible mechanism of antiseptic action on R. rubrum chromatophores is considered. This work is a continuation of the study of the effect of antiseptics on the energy transfer and fluorescence intensity in chromatophores of purple bacteria published earlier in Photosynthesis Research (Strakhovskaya et al. in Photosyn Res 147:197-209, 2021).
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Affiliation(s)
- Peter P Knox
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation, 119234
| | - Eugene P Lukashev
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation, 119234
| | - Boris N Korvatovskiy
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation, 119234
| | - Marina G Strakhovskaya
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation, 119234.
| | - Zoja K Makhneva
- Federal Research Center "Pushchino Scientific Center for Biological Research of Russian Academy of Sciences", Pushchino, Russian Federation, 142290
| | - Maxim A Bol'shakov
- Federal Research Center "Pushchino Scientific Center for Biological Research of Russian Academy of Sciences", Pushchino, Russian Federation, 142290
| | - Vladimir Z Paschenko
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation, 119234
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Knox PP, Lukashev EP, Korvatovskii BN, Seifullina NK, Goryachev SN, Allakhverdiev ES, Paschenko VZ. Effect of Dipyridamole on Membrane Energization and Energy Transfer in Chromatophores of Rba. sphaeroides. Biochemistry (Mosc) 2022; 87:1138-1148. [PMID: 36273882 PMCID: PMC9568914 DOI: 10.1134/s0006297922100078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Effect of dipyridamole (DIP) at concentrations up to 1 mM on fluorescent characteristics of light-harvesting complexes LH2 and LH1, as well as on conditions of photosynthetic electron transport chain in the bacterial chromatophores of Rba. sphaeroides was investigated. DIP was found to affect efficiency of energy transfer from the light-harvesting complex LH2 to the LH1-reaction center core complex and to produce the long-wavelength ("red") shift of the absorption band of light-harvesting bacteriochlorophyll molecules in the IR spectral region at 840-900 nm. This shift is associated with the membrane transition to the energized state. It was shown that DIP is able to reduce the photooxidized bacteriochlorophyll of the reaction center, which accelerated electron flow along the electron transport chain, thereby stimulating generation of the transmembrane potential on the chromatophore membrane. The results are important for clarifying possible mechanisms of DIP influence on the activity of membrane-bound functional proteins. In particular, they might be significant for interpreting numerous therapeutic effects of DIP.
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Affiliation(s)
- Peter P. Knox
- Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Eugene P. Lukashev
- Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | | | | | - Sergey N. Goryachev
- Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
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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: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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Strakhovskaya MG, Lukashev EP, Korvatovskiy BN, Kholina EG, Seifullina NK, Knox PP, Paschenko VZ. The effect of some antiseptic drugs on the energy transfer in chromatophore photosynthetic membranes of purple non-sulfur bacteria Rhodobacter sphaeroides. Photosynth Res 2021; 147:197-209. [PMID: 33389445 PMCID: PMC7778420 DOI: 10.1007/s11120-020-00807-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
Chromatophores of purple non-sulfur bacteria (PNSB) are invaginations of the cytoplasmic membrane that contain a relatively simple system of light-harvesting protein-pigment complexes, a photosynthetic reaction center (RC), a cytochrome complex, and ATP synthase, which transform light energy into the energy of synthesized ATP. The high content of negatively charged phosphatidylglycerol (PG) and cardiolipin (CL) in PNSB chromatophore membranes makes these structures potential targets that bind cationic antiseptics. We used the methods of stationary and kinetic fluorescence spectroscopy to study the effect of some cationic antiseptics (chlorhexidine, picloxydine, miramistin, and octenidine at concentrations up to 100 μM) on the spectral and kinetic characteristics of the components of the photosynthetic apparatus of Rhodobacter sphaeroides chromatophores. Here we present the experimental data on the reduced efficiency of light energy conversion in the chromatophore membranes isolated from the photosynthetic bacterium Rb. sphaeroides in the presence of cationic antiseptics. The addition of antiseptics did not affect the energy transfer between the light-harvesting LH1 complex and reaction center (RC). However, it significantly reduced the efficiency of the interaction between the LH2 and LH1 complexes. The effect was maximal with 100 μM octenidine. It has been proved that molecules of cationic antiseptics, which apparently bind to the heads of negatively charged cardiolipin molecules located in the rings of light-harvesting pigments on the cytoplasmic surface of the chromatophores, can disturb the optimal conditions for efficient energy migration in chromatophore membranes.
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Affiliation(s)
- Marina G Strakhovskaya
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234.
- Federal Scientific and Clinical Center of Specialized Types of Medical Care and Medical Technologies of the Federal Medical and Biological Agency of Russia, Moscow, Russian Federation.
| | - Eugene P Lukashev
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Boris N Korvatovskiy
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Ekaterina G Kholina
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Nuranija Kh Seifullina
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Peter P Knox
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234
| | - Vladimir Z Paschenko
- Biophysics Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119234
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Belyaeva NE, Bulychev AA, Klementiev KE, Paschenko VZ, Riznichenko GY, Rubin AB. Model quantification of the light-induced thylakoid membrane processes in Synechocystis sp. PCC 6803 in vivo and after exposure to radioactive irradiation. Photosynth Res 2020; 146:259-278. [PMID: 32734447 DOI: 10.1007/s11120-020-00774-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Measurements of OJIP-SMT patterns of fluorescence induction (FI) in Synechocystis sp. PCC 6803 (Synechocystis) cells on a time scale up to several minutes were mathematically treated within the framework of thylakoid membrane (T-M) model (Belyaeva et al., Photosynth Res 140:1-19, 2019) that was renewed to account for the state transitions effects. Principles of describing electron transfer in reaction centers of photosystems II and I (PSII and PSI) and cytochrome b6f complex remained unchanged, whereas parameters for dissipative reactions of non-radiative charge recombination were altered depending on the oxidation state of QB-site (neutral, reduced by one electron, empty, reduced by two electrons). According to our calculations, the initial content of plastoquinol (PQH2) in the total quinone pool of Synechocystis cells adapted to darkness for 10 min ranged between 20 and 40%. The results imply that the PQ pool mediates photosynthetic and respiratory charge flows. The redistribution of PBS antenna units responsible for the increase of Chl fluorescence in cyanobacteria (qT2 → 1) upon state 2 → 1 transition or the fluorescence lowering (qT1 → 2) due to state 1 → 2 transition were described in the model by exponential functions. Parameters of dynamically changed effective cross section were found by means of simulations of OJIP-SMT patterns observed on Synechocystis cells upon strong (3000 μmol photons m-2s-1) and moderate (1000 μmol photons m-2s-1) actinic light intensities. The corresponding light constant values kLΣAnt = 1.2 ms-1 and 0.4 ms-1 define the excitation of total antenna pool dynamically redistributed between PSII and PSI reaction centers. Although the OCP-induced quenching of antenna excitation is not involved in the model, the main features of the induction signals have been satisfactorily explained. In the case of strong illumination, the effective cross section decreases by approximately 33% for irradiated Synechocystis cells as compared to untreated cells. Under moderate light, the irradiated Synechocystis cells showed in simulations the same cross section as the untreated cells. The thylakoid model renewed with state transitions description allowed simulation of fluorescence induction OJIP-SMT curves detected on time scale from microseconds to minutes.
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Affiliation(s)
- N E Belyaeva
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119234, Moscow, Russia.
| | - A A Bulychev
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119234, Moscow, Russia
| | - K E Klementiev
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119234, Moscow, Russia
| | - V Z Paschenko
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119234, Moscow, Russia
| | - G Yu Riznichenko
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119234, Moscow, Russia
| | - A B Rubin
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119234, Moscow, Russia
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10
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Knox PP, Gorokhov VV, Korvatovsky BN, Grishanova NP, Goryachev SN, Paschenko VZ. Specific features of the temperature dependence of tryptophan fluorescence lifetime in the temperature range of −170–20 °C. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Gvozdev DA, Ramonova АА, Slonimskiy YB, Maksimov ЕG, Moisenovich ММ, Paschenko VZ. Modification by transferrin increases the efficiency of delivery and the photodynamic effect of the quantum dot-phthalocyanine complex on A431 cells. Arch Biochem Biophys 2019; 678:108192. [PMID: 31733214 DOI: 10.1016/j.abb.2019.108192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/07/2019] [Accepted: 11/12/2019] [Indexed: 12/27/2022]
Abstract
Hybrid complexes of fluorescent nanoparticles and tetrapyrrole dyes are currently considered as promising third-generation photosensitizers for photodynamic therapy, including cancer treatment. Using nanoparticles as a platform for delivery of photosensitizers to target cells can increase the efficiency of photodynamic action. In this work, we synthesized a complex of polymer-coated CdSe/ZnS quantum dots, substituted phthalocyanines and human transferrin. Such complexes effectively enter human epidermoid carcinoma cells (A431) due to transferrin-mediated endocytosis and are localized in the perinuclear compartment. We observed an efficient excitation energy transfer from the quantum dot to phthalocyanine in the cells, which indicates stability of the complex upon its internalization. It was shown that the photodynamic activity of hybrid complexes covalently bonded to transferrin is 15% higher than the activity of unmodified hybrid complexes. Our results confirm the feasibility of using fluorescent nanoparticles to enhance the photodynamic properties of photosensitizers based on tetrapyrrole dyes.
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Affiliation(s)
- D A Gvozdev
- Department of Biophysics, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia.
| | - А А Ramonova
- Bioengineering Department, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - Y B Slonimskiy
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Е G Maksimov
- Department of Biophysics, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - М М Moisenovich
- Bioengineering Department, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - V Z Paschenko
- Department of Biophysics, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
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12
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Knox PP, Korvatovskiy BN, Gorokhov VV, Goryachev SN, Mamedov MD, Paschenko VZ. Comparison of tryptophan fluorescence lifetimes in cyanobacterial photosystem I frozen in the light and in the dark. Photosynth Res 2019; 139:441-448. [PMID: 30353420 DOI: 10.1007/s11120-018-0595-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 10/09/2018] [Indexed: 06/08/2023]
Abstract
The dependence on temperature of tryptophan fluorescence lifetime in trimeric photosystem I (PSI) complexes from cyanobacteria Synechocystis sp. PCC 6803 during the heating of pre-frozen to - 180 °C in the dark or in the light-activated preparations has been studied. Fluorescence lifetime in samples frozen in the light was longer than in samples frozen in the dark. For samples in 65% glycerol at λreg = 335 nm and at 20 °C, the lifetime of components were as follows: τ1 ≈ 1.2 ns, τ2 ≈ 4.9 ns, and τ3 ≈ 20 ns. The contribution of the first component was negligible. To analyze the contribution of components 2 and 3 derived from frozen-thawed samples, two temperature ranges from - 180 to - 90 °C and above - 90 °C are considered. In doing so, the contributions of these components appear antiphase course to each other. The dependence on temperature of these contributions is explained by the influence of the microconformational protein dynamics on the tryptophan fluorescence lifetime. In the present work, a comparative analysis of temperature-dependent conformational dynamics and electron transfer in cyanobacterial PSI (Schlodder et al., in Biochemistry 37:9466-9476, 1998) and Rhodobacter sphaeroides reaction center complexes (Knox et al., in J Photochem Photobiol B 180:140-148, 2018) was also carried out.
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Affiliation(s)
- Peter P Knox
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Boris N Korvatovskiy
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Vladimir V Gorokhov
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Sergey N Goryachev
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Mahir D Mamedov
- A.N. Belozersky Institute of Physical-Chemical Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Vladimir Z Paschenko
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991.
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13
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Knox PP, Lukashev EP, Gorokhov VV, Grishanova NP, Paschenko VZ. Hybrid complexes of photosynthetic reaction centers and quantum dots in various matrices: resistance to UV irradiation and heating. Photosynth Res 2019; 139:295-305. [PMID: 29948749 DOI: 10.1007/s11120-018-0529-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/05/2018] [Indexed: 06/08/2023]
Abstract
The effects of ultraviolet (UV) irradiation (up to 0.6 J/cm2) and heating (65 °C, 20 min) on the absorption spectra and electron transfer in dehydrated film samples of photosynthetic reaction centers (RCs) from purple bacterium Rhodobacter (Rb.) sphaeroides, as well as in hybrid structures consisting of RCs and quantum dots (QDs), have been studied. The samples were placed in organic matrices containing the stabilizers of protein structure-polyvinyl alcohol (PVA) and trehalose. UV irradiation led to partially irreversible oxidation of some RCs, as well as to transformation of some fraction of the bacteriochlorophyll (BChl) molecules into bacteriopheophytin (BPheo) molecules. In addition, UV irradiation causes degradation of some BChl molecules that is accompanied by formation of 3-acetyl-chlorophyll a molecules. Finally, UV irradiation destroys the RCs carotenoid molecules. The incorporation of RCs into organic matrices reduced pheophytinization. Trehalose was especially efficient in reducing the damage to the carotenoid and BChl molecules caused by UV irradiation. Hybrid films containing RC + QD were more stable to pheophytinization upon UV irradiation. However, the presence of QDs in films did not affect the processes of carotenoid destruction. The efficiency of the electronic excitation energy transfer from QD to P865 also did not change under UV irradiation. Heating led to dramatic destruction of the RCs structure and bacteriochlorins acquired the properties of unbound molecules. Trehalose provided strong protection against destruction of the RCs and hybrid (RC + QD) complexes.
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Affiliation(s)
- Peter P Knox
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Evgeny P Lukashev
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Vladimir V Gorokhov
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Nadezhda P Grishanova
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Vladimir Z Paschenko
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia, 119991.
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14
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Knox PP, Lukashev EP, Gorokhov VV, Seifullina NK, Paschenko VZ. Relaxation processes accompanying electron stabilization in the quinone acceptor part of Rb. sphaeroides reaction centers. J Photochem Photobiol B 2018; 189:145-151. [PMID: 30347352 DOI: 10.1016/j.jphotobiol.2018.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/03/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
The temperature dependence of the dark recombination rate in photooxidized bacteriochlorophyll (P) and photoreduced quinone acceptors (ubiquinones) QA and QB of photosynthetic reaction centers of purple bacteria Rhodobacter sphaeroides (Rb. sphaeroides) was studied. Photoinduced changes in the absorption were detected in the Qx absorption band of photooxidized bacteriochlorophyll at 600 nm and in the bands corresponding to the redox changes of ubiquinones at 335 and 420-450 nm. Kinetic analysis was used to evaluate the activation energy and the characteristic time of the transient process of relaxation accompanying electron stabilization at the final quinone acceptor. A comparative study of the kinetics of oxidation-reduction reactions of photoactive bacteriochlorophyll RC purple bacteria and quinone acceptors in their individual absorption bands is an informative approach to studying the mechanisms of this stabilization. The analysis of the revealed kinetic differences makes it possible to estimate the activation energy and the characteristic times of the transition relaxation processes associated with the stabilization of the electron in the quinone acceptor part of RC. Purple bacterial reaction centers have fundamental similarities with PSII reaction centers. Such a similarity represents evolutional closeness between the two types of RC. So it is possible that the photoinduced charge separation in PSII RC, as well as in purple bacteria RC, is also accompanied by definite conformational changes. The possible role of hydrogen bonds of surrounding protein in the relaxation processes accompanying the electron transfer to quinone acceptors is discussed.
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Affiliation(s)
- P P Knox
- Department of Biophysics, Biological Faculty of the M.V., Lomonosov Moscow State University, 119991 Moscow, Russia
| | - E P Lukashev
- Department of Biophysics, Biological Faculty of the M.V., Lomonosov Moscow State University, 119991 Moscow, Russia
| | - V V Gorokhov
- Department of Biophysics, Biological Faculty of the M.V., Lomonosov Moscow State University, 119991 Moscow, Russia
| | - N Kh Seifullina
- Department of Biophysics, Biological Faculty of the M.V., Lomonosov Moscow State University, 119991 Moscow, Russia
| | - V Z Paschenko
- Department of Biophysics, Biological Faculty of the M.V., Lomonosov Moscow State University, 119991 Moscow, Russia.
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15
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Gvozdev DA, Maksimov EG, Strakhovskaya MG, Moysenovich AM, Ramonova AA, Moisenovich MM, Goryachev SN, Paschenko VZ, Rubin AB. A CdSe/ZnS quantum dot-based platform for the delivery of aluminum phthalocyanines to bacterial cells. J Photochem Photobiol B 2018; 187:170-179. [PMID: 30170287 DOI: 10.1016/j.jphotobiol.2018.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/18/2018] [Accepted: 08/01/2018] [Indexed: 01/08/2023]
Abstract
Enhancement of optical properties of photosensitizers by additional light-harvesting antennas is promising for the improvement of the photodynamic therapy. However, large number of parameters determine interactions of nanoparticles and photosensitizers in complex and, thus the photodynamic efficacy of the hybrid structure. In order to achieve high efficiency of energetic coupling and photodynamic activity of such complexes it is important to know the location of the photosensitizer molecule on the nanoparticle, because it affects the spectral properties of the photosensitizer and the stability of the hybrid complex in vitro/in vivo. In this work complexes of polycationic aluminum phthalocyanines and CdSe/ZnS quantum dots were obtained. We used quantum dots which outer shell consists of polymer with carboxyl groups and provides water solubility and the negative charge of the nanoparticle. We found that phthalocyanine molecules could penetrate deeply into the polymer shell of quantum dot, leading thereby to significant changes in the spectral and photodynamic properties of phthalocyanines. We also showed that noncovalent interactions between phthalocyanine and quantum dot provide possibility for a release of the phthalocyanine from the hybrid complex and its binding to both Gram-positive and Gram-negative bacterial cells. Also, detailed characterization of the nanoparticle core and shell sizes was carried out.
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Affiliation(s)
- D A Gvozdev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia.
| | - E G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - M G Strakhovskaya
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia; Federal Scientific and Clinical Center for Specialized Medical Service and Medical Technologies, FMBA, Moscow, Russia
| | - A M Moysenovich
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - A A Ramonova
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - M M Moisenovich
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - S N Goryachev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - V Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - A B Rubin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
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16
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Moldenhauer M, Sluchanko NN, Tavraz NN, Junghans C, Buhrke D, Willoweit M, Chiappisi L, Schmitt FJ, Vukojević V, Shirshin EA, Ponomarev VY, Paschenko VZ, Gradzielski M, Maksimov EG, Friedrich T. Interaction of the signaling state analog and the apoprotein form of the orange carotenoid protein with the fluorescence recovery protein. Photosynth Res 2018; 135:125-139. [PMID: 28236074 DOI: 10.1007/s11120-017-0346-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 01/30/2017] [Indexed: 06/06/2023]
Abstract
Photoprotection in cyanobacteria relies on the interplay between the orange carotenoid protein (OCP) and the fluorescence recovery protein (FRP) in a process termed non-photochemical quenching, NPQ. Illumination with blue-green light converts OCP from the basic orange state (OCPO) into the red-shifted, active state (OCPR) that quenches phycobilisome (PBs) fluorescence to avoid excessive energy flow to the photosynthetic reaction centers. Upon binding of FRP, OCPR is converted to OCPO and dissociates from PBs; however, the mode and site of OCPR/FRP interactions remain elusive. Recently, we have introduced the purple OCPW288A mutant as a competent model for the signaling state OCPR (Sluchanko et al., Biochim Biophys Acta 1858:1-11, 2017). Here, we have utilized fluorescence labeling of OCP at its native cysteine residues to generate fluorescent OCP proteins for fluorescence correlation spectroscopy (FCS). Our results show that OCPW288A has a 1.6(±0.4)-fold larger hydrodynamic radius than OCPO, supporting the hypothesis of domain separation upon OCP photoactivation. Whereas the addition of FRP did not change the diffusion behavior of OCPO, a substantial compaction of the OCPW288A mutant and of the OCP apoprotein was observed. These results show that sufficiently stable complexes between FRP and OCPW288A or the OCP apoprotein are formed to be detected by FCS. 1:1 complex formation with a micromolar apparent dissociation constant between OCP apoprotein and FRP was confirmed by size-exclusion chromatography. Beyond the established OCP/FRP interaction underlying NPQ cessation, the OCP apoprotein/FRP interaction suggests a more general role of FRP as a scaffold protein for OCP maturation.
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Affiliation(s)
- Marcus Moldenhauer
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, 33 Leninsky prospect, building 1, Moscow, Russian Federation, 119071
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Neslihan N Tavraz
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Cornelia Junghans
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - David Buhrke
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Mario Willoweit
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Leonardo Chiappisi
- Institut für Chemie Sekr. TC 7, Technische Universität Berlin, Straße des 17. Juni 124, 10623, Berlin, Germany
| | - Franz-Josef Schmitt
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Vladana Vukojević
- Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, CMM L8:01, 17176, Stockholm, Sweden
| | - Evgeny A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow, Russian Federation, 119992
| | - Vladimir Y Ponomarev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Michael Gradzielski
- Institut für Chemie Sekr. TC 7, Technische Universität Berlin, Straße des 17. Juni 124, 10623, Berlin, Germany
| | - Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Thomas Friedrich
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany.
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17
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Moldenhauer M, Sluchanko NN, Tavraz NN, Junghans C, Buhrke D, Willoweit M, Chiappisi L, Schmitt FJ, Vukojević V, Shirshin EA, Ponomarev VY, Paschenko VZ, Gradzielski M, Maksimov EG, Friedrich T. Erratum to: Interaction of the signaling state analog and the apoprotein form of the orange carotenoid protein with the fluorescence recovery protein. Photosynth Res 2018; 135:141-142. [PMID: 28929465 DOI: 10.1007/s11120-017-0445-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In Fig. 1a in the original article, the amino acid side chains were incorrectly labeled in the structure representation of the orange carotenoid protein (OCP). The corrected figure is printed in this erratum.
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Affiliation(s)
- Marcus Moldenhauer
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, 33 Leninsky prospect, building 1, Moscow, Russian Federation, 119071
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Neslihan N Tavraz
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Cornelia Junghans
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - David Buhrke
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Mario Willoweit
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Leonardo Chiappisi
- Institut für Chemie Sekr. TC 7, Technische Universität Berlin, Straße des 17. Juni 124, 10623, Berlin, Germany
| | - Franz-Josef Schmitt
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Vladana Vukojević
- Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, CMM L8:01, 17176, Stockholm, Sweden
| | - Evgeny A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow, Russian Federation, 119992
| | - Vladimir Y Ponomarev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Michael Gradzielski
- Institut für Chemie Sekr. TC 7, Technische Universität Berlin, Straße des 17. Juni 124, 10623, Berlin, Germany
| | - Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1, p. 12, Moscow, Russian Federation, 119992
| | - Thomas Friedrich
- Institut für Chemie Sekr. PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany.
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18
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Knox PP, Gorokhov VV, Korvatovskiy BN, Lukashev EP, Goryachev SN, Paschenko VZ, Rubin AB. The effect of light and temperature on the dynamic state of Rhodobacter sphaeroides reaction centers proteins determined from changes in tryptophan fluorescence lifetime and P +Q A- recombination kinetics. J Photochem Photobiol B 2018; 180:140-148. [PMID: 29413697 DOI: 10.1016/j.jphotobiol.2018.01.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/22/2018] [Accepted: 01/29/2018] [Indexed: 11/26/2022]
Abstract
The temperature dependencies of the rate of dark recombination of separated charges between the photoactive bacteriochlorophyll and the primary quinone acceptor (QA) in photosynthetic reaction centers (RCs) of the purple bacteria Rhodobacter sphaeroides (Rb. sphaeroides) were investigated. Measurements were performed in water-glycerol and trehalose environments after freezing to -180 °C in the dark and under actinic light with subsequent heating. Simultaneously, the RC tryptophanyl fluorescence lifetime in the spectral range between 323 and 348 nm was measured under these conditions. A correlation was found between the temperature dependencies of the functional and dynamic parameters of RCs in different solvent mixtures. For the first time, differences in the average fluorescence lifetime of tryptophanyl residues were measured between RCs frozen in the dark and in the actinic light. The obtained results can be explained by the RC transitions between different conformational states and the dynamic processes in the structure of the hydrogen bonds of RCs. We assumed that RCs exist in two main microconformations - "fast" and "slow", which are characterized by different rates of P+ and QA- recombination reactions. The "fast" conformation is induced in frozen RCs in the dark, while the "slow" conformation of RC occurs when the RC preparation is frozen under actinic light. An explanation of the temperature dependencies of tryptophan fluorescence lifetimes in RC proteins was made under the assumption that temperature changes affect mainly the electron transfer from the indole ring of the tryptophan molecule to the nearest amide or carboxyl groups.
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Affiliation(s)
- Peter P Knox
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Vladimir V Gorokhov
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Boris N Korvatovskiy
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Eugene P Lukashev
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Sergey N Goryachev
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Vladimir Z Paschenko
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Andrew B Rubin
- Department of Biophysics, Biological Faculty of the M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
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19
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Gorokhov VV, Knox PP, Korvatovskiy BN, Seifullina NK, Goryachev SN, Paschenko VZ. Temperature Dependence of Tryptophan Fluorescence Lifetime in Aqueous Glycerol and Trehalose Solutions. Biochemistry (Mosc) 2018; 82:1269-1275. [PMID: 29223153 DOI: 10.1134/s0006297917110049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The temperature dependences of tryptophan fluorescence decay kinetics in aqueous glycerol and 1 M trehalose solutions were examined. The fluorescence decay kinetics were recorded in the spectral region of 292.5-417.5 nm with nanosecond time resolution. The kinetics curves were approximated by the sum of three exponential terms, and the spectral distribution (DAS) of these components was determined. An antisymbatic course of fluorescence decay times of two (fast and medium) components in the temperature range from -60 to +10°C was observed. The third (slow) component showed only slight temperature dependence. The antisymbatic behavior of fluorescence lifetimes of the fast and medium components was explained on the assumption that some of the excited tryptophan molecules are transferred from a short-wavelength B-form with short fluorescence lifetime to a long-wavelength R-form with an intermediate fluorescence lifetime. This transfer occurred in the indicated temperature range.
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Affiliation(s)
- V V Gorokhov
- Lomonosov Moscow State University, Faculty of Biology, Moscow, 119991, Russia.
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20
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Maksimov EG, Mironov KS, Trofimova MS, Nechaeva NL, Todorenko DA, Klementiev KE, Tsoraev GV, Tyutyaev EV, Zorina AA, Feduraev PV, Allakhverdiev SI, Paschenko VZ, Los DA. Membrane fluidity controls redox-regulated cold stress responses in cyanobacteria. Photosynth Res 2017; 133:215-223. [PMID: 28110449 DOI: 10.1007/s11120-017-0337-333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 01/08/2017] [Indexed: 05/19/2023]
Abstract
Membrane fluidity is the important regulator of cellular responses to changing ambient temperature. Bacteria perceive cold by the transmembrane histidine kinases that sense changes in thickness of the cytoplasmic membrane due to its rigidification. In the cyanobacterium Synechocystis, about a half of cold-responsive genes is controlled by the light-dependent transmembrane histidine kinase Hik33, which also partially controls the responses to osmotic, salt, and oxidative stress. This implies the existence of some universal, but yet unknown signal that triggers adaptive gene expression in response to various stressors. Here we selectively probed the components of photosynthetic machinery and functionally characterized the thermodynamics of cyanobacterial photosynthetic membranes with genetically altered fluidity. We show that the rate of oxidation of the quinone pool (PQ), which interacts with both photosynthetic and respiratory electron transport chains, depends on membrane fluidity. Inhibitor-induced stimulation of redox changes in PQ triggers cold-induced gene expression. Thus, the fluidity-dependent changes in the redox state of PQ may universally trigger cellular responses to stressors that affect membrane properties.
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Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Kirill S Mironov
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
| | - Marina S Trofimova
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
| | - Natalya L Nechaeva
- Chemical Enzymology Department, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Daria A Todorenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Konstantin E Klementiev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Georgy V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Eugene V Tyutyaev
- Department of Biotechnology, Bioengineering and Biochemistry, Faculty Biotechnology and Biology, Ogarev Mordovia State University, Saransk, Republic of Mordovia, Russia, 430032
| | - Anna A Zorina
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
| | - Pavel V Feduraev
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
- Chemical-Biological Institute, Immanuel Kant Federal Baltic University, Kaliningrad, Russia, 236041
| | | | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Dmitry A Los
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276.
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21
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Razjivin AP, Lukashev EP, Kompanets VO, Kozlovsky VS, Ashikhmin AA, Chekalin SV, Moskalenko AA, Paschenko VZ. Excitation energy transfer from the bacteriochlorophyll Soret band to carotenoids in the LH2 light-harvesting complex from Ectothiorhodospira haloalkaliphila is negligible. Photosynth Res 2017; 133:289-295. [PMID: 28205063 DOI: 10.1007/s11120-017-0341-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/18/2017] [Indexed: 06/06/2023]
Abstract
Pathways of intramolecular conversion and intermolecular electronic excitation energy transfer (EET) in the photosynthetic apparatus of purple bacteria remain subject to debate. Here we experimentally tested the possibility of EET from the bacteriochlorophyll (BChl) Soret band to the singlet S2 level of carotenoids using femtosecond pump-probe measurements and steady-state fluorescence excitation and absorption measurements in the near-ultraviolet and visible spectral ranges. The efficiency of EET from the Soret band of BChl to S2 of the carotenoids in light-harvesting complex LH2 from the purple bacterium Ectothiorhodospira haloalkaliphila appeared not to exceed a few percent.
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Affiliation(s)
- A P Razjivin
- Belozersky Research Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia, 119991.
| | - E P Lukashev
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
| | - V O Kompanets
- Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russia, 142190
| | - V S Kozlovsky
- Belozersky Research Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
| | - A A Ashikhmin
- Institute of Fundamental Problems of Biology, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290
| | - S V Chekalin
- Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russia, 142190
| | - A A Moskalenko
- Institute of Fundamental Problems of Biology, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290
| | - V Z Paschenko
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
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22
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Maksimov EG, Mironov KS, Trofimova MS, Nechaeva NL, Todorenko DA, Klementiev KE, Tsoraev GV, Tyutyaev EV, Zorina AA, Feduraev PV, Allakhverdiev SI, Paschenko VZ, Los DA. Membrane fluidity controls redox-regulated cold stress responses in cyanobacteria. Photosynth Res 2017; 133:215-223. [PMID: 28110449 DOI: 10.1007/s11120-017-0337-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 01/08/2017] [Indexed: 06/06/2023]
Abstract
Membrane fluidity is the important regulator of cellular responses to changing ambient temperature. Bacteria perceive cold by the transmembrane histidine kinases that sense changes in thickness of the cytoplasmic membrane due to its rigidification. In the cyanobacterium Synechocystis, about a half of cold-responsive genes is controlled by the light-dependent transmembrane histidine kinase Hik33, which also partially controls the responses to osmotic, salt, and oxidative stress. This implies the existence of some universal, but yet unknown signal that triggers adaptive gene expression in response to various stressors. Here we selectively probed the components of photosynthetic machinery and functionally characterized the thermodynamics of cyanobacterial photosynthetic membranes with genetically altered fluidity. We show that the rate of oxidation of the quinone pool (PQ), which interacts with both photosynthetic and respiratory electron transport chains, depends on membrane fluidity. Inhibitor-induced stimulation of redox changes in PQ triggers cold-induced gene expression. Thus, the fluidity-dependent changes in the redox state of PQ may universally trigger cellular responses to stressors that affect membrane properties.
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Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Kirill S Mironov
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
| | - Marina S Trofimova
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
| | - Natalya L Nechaeva
- Chemical Enzymology Department, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Daria A Todorenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Konstantin E Klementiev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Georgy V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Eugene V Tyutyaev
- Department of Biotechnology, Bioengineering and Biochemistry, Faculty Biotechnology and Biology, Ogarev Mordovia State University, Saransk, Republic of Mordovia, Russia, 430032
| | - Anna A Zorina
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
| | - Pavel V Feduraev
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276
- Chemical-Biological Institute, Immanuel Kant Federal Baltic University, Kaliningrad, Russia, 236041
| | | | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia, 119992
| | - Dmitry A Los
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia, 127276.
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23
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Maksimov EG, Sluchanko NN, Slonimskiy YB, Mironov KS, Klementiev KE, Moldenhauer M, Friedrich T, Los DA, Paschenko VZ, Rubin AB. The Unique Protein-to-Protein Carotenoid Transfer Mechanism. Biophys J 2017; 113:402-414. [PMID: 28746851 DOI: 10.1016/j.bpj.2017.06.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 05/23/2017] [Accepted: 06/02/2017] [Indexed: 11/26/2022] Open
Abstract
Orange Carotenoid Protein (OCP) is known as an effector and regulator of cyanobacterial photoprotection. This 35 kDa water-soluble protein provides specific environment for blue-green light absorbing keto-carotenoids, which excitation causes dramatic but fully reversible rearrangements of the OCP structure, including carotenoid translocation and separation of C- and N-terminal domains upon transition from the basic orange to photoactivated red OCP form. Although recent studies greatly improved our understanding of the OCP photocycle and interaction with phycobilisomes and the fluorescence recovery protein, the mechanism of OCP assembly remains unclear. Apparently, this process requires targeted delivery and incorporation of a highly hydrophobic carotenoid molecule into the water-soluble apoprotein of OCP. Recently, we introduced, to our knowledge, a novel carotenoid carrier protein, COCP, which consists of dimerized C-domain(s) of OCP and can combine with the isolated N-domain to form transient OCP-like species. Here, we demonstrate that in vitro COCP efficiently transfers otherwise tightly bound carotenoid to the full-length OCP apoprotein, resulting in formation of photoactive OCP from completely photoinactive species. We accurately analyze the peculiarities of this process that, to the best of our knowledge, appears unique, a previously uncharacterized protein-to-protein carotenoid transfer mechanism. We hypothesize that a similar OCP assembly can occur in vivo, substantiating specific roles of the COCP carotenoid carrier in cyanobacterial photoprotection.
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Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, M.V. Lomonosov Moscow State University, Moscow, Russia.
| | - Nikolai N Sluchanko
- Department of Biophysics, 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
| | - Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia; Department of Biochemistry, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Kirill S Mironov
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
| | | | | | - Thomas Friedrich
- Technical University of Berlin, Institute of Chemistry, Berlin, Germany
| | - Dmitry A Los
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
| | - Vladimir Z Paschenko
- Department of Biophysics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Andrew B Rubin
- Department of Biophysics, M.V. Lomonosov Moscow State University, Moscow, Russia
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24
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Maksimov EG, Sluchanko NN, Mironov KS, Shirshin EA, Klementiev KE, Tsoraev GV, Moldenhauer M, Friedrich T, Los DA, Allakhverdiev SI, Paschenko VZ, Rubin AB. Fluorescent Labeling Preserving OCP Photoactivity Reveals Its Reorganization during the Photocycle. Biophys J 2017; 112:46-56. [PMID: 28076815 DOI: 10.1016/j.bpj.2016.11.3193] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/29/2016] [Accepted: 11/21/2016] [Indexed: 12/11/2022] Open
Abstract
Orange carotenoid protein (OCP), responsible for the photoprotection of the cyanobacterial photosynthetic apparatus under excessive light conditions, undergoes significant rearrangements upon photoconversion and transits from the stable orange to the signaling red state. This is thought to involve a 12-Å translocation of the carotenoid cofactor and separation of the N- and C-terminal protein domains. Despite clear recent progress, the detailed mechanism of the OCP photoconversion and associated photoprotection remains elusive. Here, we labeled the OCP of Synechocystis with tetramethylrhodamine-maleimide (TMR) and obtained a photoactive OCP-TMR complex, the fluorescence of which was highly sensitive to the protein state, showing unprecedented contrast between the orange and red states and reflecting changes in protein conformation and the distances from TMR to the carotenoid throughout the photocycle. The OCP-TMR complex was sensitive to the light intensity, temperature, and viscosity of the solvent. Based on the observed Förster resonance energy transfer, we determined that upon photoconversion, the distance between TMR (donor) bound to a cysteine in the C-terminal domain and the carotenoid (acceptor) increased by 18 Å, with simultaneous translocation of the carotenoid into the N-terminal domain. Time-resolved fluorescence anisotropy revealed a significant decrease of the OCP rotation rate in the red state, indicating that the light-triggered conversion of the protein is accompanied by an increase of its hydrodynamic radius. Thus, our results support the idea of significant structural rearrangements of OCP, providing, to our knowledge, new insights into the structural rearrangements of OCP throughout the photocycle and a completely novel approach to the study of its photocycle and non-photochemical quenching. We suggest that this approach can be generally applied to other photoactive proteins.
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Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, Lomonosov Moscow State University, Moscow, Russia.
| | - Nikolai N Sluchanko
- Laboratory of Structural Biochemistry of Proteins, A. N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Kirill S Mironov
- Laboratory of Cell Regulation, K. A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
| | - Evgeny A Shirshin
- Institute of Chemistry, Technical University of Berlin, Berlin, Germany
| | | | - Georgy V Tsoraev
- Department of Biophysics, Lomonosov Moscow State University, Moscow, Russia
| | - Marcus Moldenhauer
- Department of Intracellular Regulation, Institute of Plant Physiology, Moscow, Russia
| | - Thomas Friedrich
- Department of Intracellular Regulation, Institute of Plant Physiology, Moscow, Russia
| | - Dmitry A Los
- Department of Intracellular Regulation, Institute of Plant Physiology, Moscow, Russia
| | - Suleyman I Allakhverdiev
- Laboratory of Cell Regulation, K. A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia; Institute of Basic Biological Problems, Russian Academy of Sciences, Moscow, Russia.
| | | | - Andrew B Rubin
- Department of Biophysics, Lomonosov Moscow State University, Moscow, Russia
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25
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Maksimov EG, Sluchanko NN, Mironov KS, Shirshin EA, Klementiev KE, Tsoraev GV, Moldenhauer M, Friedrich T, Los DA, Allakhverdiev SI, Paschenko VZ, Rubin AB. Fluorescent Labeling Preserving OCP Photoactivity Reveals Its Reorganization during the Photocycle. Biophys J 2017; 112:827. [PMID: 28266309 DOI: 10.1016/j.bpj.2017.01.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.
| | - Nikolai N Sluchanko
- Laboratory of Structural Biochemistry of Proteins, A. N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Kirill S Mironov
- Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
| | - Evgeny A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Konstantin E Klementiev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Georgy V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Marcus Moldenhauer
- Institute of Chemistry PC 14, Technical University of Berlin, Berlin, Germany
| | - Thomas Friedrich
- Institute of Chemistry PC 14, Technical University of Berlin, Berlin, Germany
| | - Dmitry A Los
- Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia
| | - Suleyman I Allakhverdiev
- Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia; Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Russia.
| | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Andrew B Rubin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
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26
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Paschenko VZ, Gorokhov VV, Grishanova NP, Korvatovskii BN, Ivanov MV, Maksimov EG, Mamedov MD. Non-photochemical Fluorescence Quenching in Photosystem II Antenna Complexes by the Reaction Center Cation Radical. Biochemistry (Mosc) 2017; 81:583-90. [PMID: 27301286 DOI: 10.1134/s0006297916060043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In direct experiments, rate constants of photochemical (kP) and non-photochemical (kP(+)) fluorescence quenching were determined in membrane fragments of photosystem II (PSII), in oxygen-evolving PSII core particles, as well as in core particles deprived of the oxygen-evolving complex. For this purpose, a new approach to the pulse fluorometry method was implemented. In the "dark" reaction center (RC) state, antenna fluorescence decay kinetics were measured under low-intensity excitation (532 nm, pulse repetition rate 1 Hz), and the emission was registered by a streak camera. To create a "closed" [P680(+)QA(-)] RC state, a high-intensity pre-excitation pulse (pump pulse, 532 nm) of the sample was used. The time advance of the pump pulse against the measuring pulse was 8 ns. In this experimental configuration, under the pump pulse, the [P680(+)QA(-)] state was formed in RC, whereupon antenna fluorescence kinetics was measured using a weak testing picosecond pulsed excitation light applied to the sample 8 ns after the pump pulse. The data were fitted by a two-exponential approximation. Efficiency of antenna fluorescence quenching by the photoactive RC pigment in its oxidized (P680(+)) state was found to be ~1.5 times higher than that of the neutral (P680) RC state. To verify the data obtained with a streak camera, control measurements of PSII complex fluorescence decay kinetics by the single-photon counting technique were carried out. The results support the conclusions drawn from the measurements registered with the streak camera. In this case, the fitting of fluorescence kinetics was performed in three-exponential approximation, using the value of τ1 obtained by analyzing data registered by the streak camera. An additional third component obtained by modeling the data of single photon counting describes the P680(+)Pheo(-) charge recombination. Thus, for the first time the ratio of kP(+)/kP = 1.5 was determined in a direct experiment. The mechanisms of higher efficiency for non-photochemical antenna fluorescence quenching by RC cation radical in comparison to that of photochemical quenching are discussed.
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Affiliation(s)
- V Z Paschenko
- Lomonosov Moscow State University, Faculty of Biology, Moscow, 119991, Russia.
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27
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Maksimov EG, Moldenhauer M, Shirshin EA, Parshina EA, Sluchanko NN, Klementiev KE, Tsoraev GV, Tavraz NN, Willoweit M, Schmitt FJ, Breitenbach J, Sandmann G, Paschenko VZ, Friedrich T, Rubin AB. A comparative study of three signaling forms of the orange carotenoid protein. Photosynth Res 2016; 130:389-401. [PMID: 27161566 DOI: 10.1007/s11120-016-0272-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/27/2016] [Indexed: 06/05/2023]
Abstract
Orange carotenoid protein (OCP) is a water-soluble photoactive protein responsible for a photoprotective mechanism of nonphotochemical quenching in cyanobacteria. Under blue-green illumination, OCP converts from the stable orange into the signaling red quenching form; however, the latter form could also be obtained by chemical activation with high concentrations of sodium thiocyanate (NaSCN) or point mutations. In this work, we show that a single replacement of tryptophan-288, normally involved in protein-chromophore interactions, by alanine, results in formation of a new protein form, hereinafter referred to as purple carotenoid protein (PCP). Comparison of resonance Raman spectra of the native photoactivated red form, chemically activated OCP, and PCP reveals that carotenoid conformation is sensitive to the structure of the C-domain, implicating that the chromophore retains some interactions with this part of the protein in the active red form. Combination of differential scanning fluorimetry and picosecond time-resolved fluorescence anisotropy measurements allowed us to compare the stability of different OCP forms and to estimate relative differences in protein rotation rates. These results were corroborated by hydrodynamic analysis of proteins by dynamic light scattering and analytical size-exclusion chromatography, indicating that the light-induced conversion of the protein is accompanied by a significant increase in its size. On the whole, our data support the idea that the red form of OCP is a molten globule-like protein in which, however, interactions between the carotenoid and the C-terminal domain are preserved.
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Affiliation(s)
- E G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia.
| | - M Moldenhauer
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - E A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - E A Parshina
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - N N Sluchanko
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071, Moscow, Russia
| | - K E Klementiev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - G V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - N N Tavraz
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - M Willoweit
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - F-J Schmitt
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - J Breitenbach
- Institute for Molecular Biosciences, Johann Wolfgang Goethe University of Frankfurt, Max-von-Laue-Straße 9, 60438, Frankfurt, Germany
| | - G Sandmann
- Institute for Molecular Biosciences, Johann Wolfgang Goethe University of Frankfurt, Max-von-Laue-Straße 9, 60438, Frankfurt, Germany
| | - V Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
| | - T Friedrich
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - A B Rubin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
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28
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Paschenko VZ, Churin AA, Gorokhov VV, Grishanova NP, Korvatovskii BN, Maksimov EG, Mamedov MD. The efficiency of non-photochemical fluorescence quenching by cation radicals in photosystem II reaction centers. Photosynth Res 2016; 130:325-333. [PMID: 27075994 DOI: 10.1007/s11120-016-0260-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 04/04/2016] [Indexed: 06/05/2023]
Abstract
In a direct experiment, the rate constants of photochemical k p and non-photochemical k p+ quenching of the chlorophyll fluorescence have been determined in spinach photosystem II (PS II) membrane fragments, oxygen-evolving PS II core, as well as manganese-depleted PS II particles using pulse fluorimetry. In the dark-adapted reaction center(s) (RC), the fluorescence decay kinetics of the antenna were measured at low-intensity picosecond pulsed excitation. To create a "closed" P680+Q A- state, RCs were illuminated by high-intensity actinic flash 8 ns prior to the measuring flash. The obtained data were approximated by the sum of two decaying exponents. It was found that the antennae fluorescence quenching efficiency by the oxidized photoactive pigment of RC P680+ was about 1.5 times higher than that of the neutral P680 state. These results were confirmed by a single-photon counting technique, which allowed to resolve the additional slow component of the fluorescence decay. Slow component was assigned to the charge recombination of P680+Pheo- in PS II RC. Thus, for the first time, the ratio k p+ /k p ≅ 1.5 was found directly. The mechanism of the higher efficiency of non-photochemical quenching comparing to photochemical quenching is discussed.
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Affiliation(s)
- V Z Paschenko
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234.
| | - A A Churin
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - V V Gorokhov
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - N P Grishanova
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - B N Korvatovskii
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - E G Maksimov
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - M D Mamedov
- A.N.Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory 1, Build. 40, Moscow, Russia, 119992
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29
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Knox PP, Korvatovsky BN, Krasilnikov PM, Paschenko VZ, Seifullina NH, Grishanova NP, Rubin AB. Temperature dependence of protein fluorescence in Rb. sphaeroides reaction centers frozen to 80 K in the dark or on the actinic light as the indicator of protein conformational dynamics. DOKL BIOCHEM BIOPHYS 2016; 467:105-9. [PMID: 27193710 DOI: 10.1134/s1607672916020083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Indexed: 11/22/2022]
Abstract
The differences in the average fluorescence lifetime (τav) of tryptophanyls in photosynthetic reaction center (RC) of the purple bacteria Rb. sphaeroides frozen to 80 K in the dark or on the actinic light was found. This difference disappeared during subsequent heating at the temperatures above 250 K. The computer-based calculation of vibration spectra of the tryptophan molecule was performed. As a result, the normal vibrational modes associated with deformational vibrations of the aromatic ring of the tryptophan molecule were found. These deformational vibrations may be active during the nonradiative transition of the molecule from the excited to the ground state. We assume that the differences in τav may be associated with the change in the activity of these vibration modes due to local variations in the microenvironment of tryptophanyls during the light activation.
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Affiliation(s)
- P P Knox
- Biological Faculty, Moscow State University, Moscow, 119991, Russia.
| | - B N Korvatovsky
- Biological Faculty, Moscow State University, Moscow, 119991, Russia
| | - P M Krasilnikov
- Biological Faculty, Moscow State University, Moscow, 119991, Russia
| | - V Z Paschenko
- Biological Faculty, Moscow State University, Moscow, 119991, Russia
| | - N H Seifullina
- Biological Faculty, Moscow State University, Moscow, 119991, Russia
| | - N P Grishanova
- Biological Faculty, Moscow State University, Moscow, 119991, Russia
| | - A B Rubin
- Biological Faculty, Moscow State University, Moscow, 119991, Russia
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Maksimov EG, Shirshin EA, Sluchanko NN, Zlenko DV, Parshina EY, Tsoraev GV, Klementiev KE, Budylin GS, Schmitt FJ, Friedrich T, Fadeev VV, Paschenko VZ, Rubin AB. The Signaling State of Orange Carotenoid Protein. Biophys J 2016; 109:595-607. [PMID: 26244741 DOI: 10.1016/j.bpj.2015.06.052] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 06/01/2015] [Accepted: 06/25/2015] [Indexed: 10/23/2022] Open
Abstract
Orange carotenoid protein (OCP) is the photoactive protein that is responsible for high light tolerance in cyanobacteria. We studied the kinetics of the OCP photocycle by monitoring changes in its absorption spectrum, intrinsic fluorescence, and fluorescence of the Nile red dye bound to OCP. It was demonstrated that all of these three methods provide the same kinetic parameters of the photocycle, namely, the kinetics of OCP relaxation in darkness was biexponential with a ratio of two components equal to 2:1 independently of temperature. Whereas the changes of the absorption spectrum of OCP characterize the geometry and environment of its chromophore, the intrinsic fluorescence of OCP reveals changes in its tertiary structure, and the fluorescence properties of Nile red indicate the exposure of hydrophobic surface areas of OCP to the solvent following the photocycle. The results of molecular-dynamics studies indicated the presence of two metastable conformations of 3'-hydroxyechinenone, which is consistent with characteristic changes in the Raman spectra. We conclude that rotation of the β-ionylidene ring in the C-terminal domain of OCP could be one of the first conformational rearrangements that occur during photoactivation. The obtained results suggest that the photoactivated form of OCP represents a molten globule-like state that is characterized by increased mobility of tertiary structure elements and solvent accessibility.
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Affiliation(s)
- Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.
| | - Evgeny A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Dmitry V Zlenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Evgenia Y Parshina
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Georgy V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Konstantin E Klementiev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Gleb S Budylin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Franz-Josef Schmitt
- Institute of Chemistry, Max-Volmer Laboratory of Biophysical Chemistry, Technical University Berlin, Berlin, Germany
| | - Thomas Friedrich
- Institute of Chemistry, Max-Volmer Laboratory of Biophysical Chemistry, Technical University Berlin, Berlin, Germany
| | - Victor V Fadeev
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Vladimir Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Andrew B Rubin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
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Maksimov EG, Gvozdev DA, Strakhovskaya MG, Paschenko VZ. Hybrid structures of polycationic aluminum phthalocyanines and quantum dots. Biochemistry (Mosc) 2015; 80:323-31. [PMID: 25761686 DOI: 10.1134/s0006297915030074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Semiconductor nanocrystals (CdSe/ZnS quantum dots, QDs) were used as inorganic focusing antenna, allowing for the enhancement of fluorescence and photosensitizing activity of polycationic aluminum phthalocyanines (PCs). It was found that QDs form stable complexes with PCs in aqueous solutions due to electrostatic interactions. In such hybrid complexes, we observed highly efficient nonradiative energy transfer from QD to PC, leading to a sharp increase in the effective absorption cross section of PC in the absorption bands of the CdSe/ZnS quantum dots. When hybrid complexes are excited within these bands, the intensity of PC fluorescence and the rate of photosensitized singlet oxygen generation increases significantly (up to 500 and 350%, correspondingly) compared to free PC at the same concentration. The observed effect is of interest for modeling primary stages of photosynthesis and increasing photosensitizing activity of dyes used in photodynamic therapy.
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Affiliation(s)
- E G Maksimov
- Lomonosov Moscow State University, Faculty of Biology, Moscow, 119991, Russia.
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Belyaeva NE, Schmitt FJ, Paschenko VZ, Riznichenko GY, Rubin AB. Modeling of the redox state dynamics in photosystem II of Chlorella pyrenoidosa Chick cells and leaves of spinach and Arabidopsis thaliana from single flash-induced fluorescence quantum yield changes on the 100 ns-10 s time scale. Photosynth Res 2015; 125:123-140. [PMID: 26049407 DOI: 10.1007/s11120-015-0163-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 05/27/2015] [Indexed: 06/04/2023]
Abstract
The time courses of the photosystem II (PSII) redox states were analyzed with a model scheme supposing a fraction of 11-25 % semiquinone (with reduced [Formula: see text]) RCs in the dark. Patterns of single flash-induced transient fluorescence yield (SFITFY) measured for leaves (spinach and Arabidopsis (A.) thaliana) and the thermophilic alga Chlorella (C.) pyrenoidosa Chick (Steffen et al. Biochemistry 44:3123-3132, 2005; Belyaeva et al. Photosynth Res 98:105-119, 2008, Plant Physiol Biochem 77:49-59, 2014) were fitted with the PSII model. The simulations show that at high-light conditions the flash generated triplet carotenoid (3)Car(t) population is the main NPQ regulator decaying in the time interval of 6-8 μs. So the SFITFY increase up to the maximum level [Formula: see text]/F 0 (at ~50 μs) depends mainly on the flash energy. Transient electron redistributions on the RC redox cofactors were displayed to explain the SFITFY measured by weak light pulses during the PSII relaxation by electron transfer (ET) steps and coupled proton transfer on both the donor and the acceptor side of the PSII. The contribution of non-radiative charge recombination was taken into account. Analytical expressions for the laser flash, the (3)Car(t) decay and the work of the water-oxidizing complex (WOC) were used to improve the modeled P680(+) reduction by YZ in the state S 1 of the WOC. All parameter values were compared between spinach, A. thaliana leaves and C. pyrenoidosa alga cells and at different laser flash energies. ET from [Formula: see text] slower in alga as compared to leaf samples was elucidated by the dynamics of [Formula: see text] fractions to fit SFITFY data. Low membrane energization after the 10 ns single turnover flash was modeled: the ∆Ψ(t) amplitude (20 mV) is found to be about 5-fold smaller than under the continuous light induction; the time-independent lumen pHL, stroma pHS are fitted close to dark estimates. Depending on the flash energy used at 1.4, 4, 100 % the pHS in stroma is fitted to 7.3, 7.4, and 7.7, respectively. The biggest ∆pH difference between stroma and lumen was found to be 1.2, thus pH- dependent NPQ was not considered.
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Affiliation(s)
- N E Belyaeva
- Department of Biophysics, Biology Faculty, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia,
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Maksimov EG, Klementiev KE, Shirshin EA, Tsoraev GV, Elanskaya IV, Paschenko VZ. Features of temporal behavior of fluorescence recovery in Synechocystis sp. PCC6803. Photosynth Res 2015; 125:167-178. [PMID: 25800518 DOI: 10.1007/s11120-015-0124-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 03/18/2015] [Indexed: 06/04/2023]
Abstract
Under high photon flux density of solar radiation, the photosynthetic apparatus can be damaged. To prevent this photodestruction, cyanobacteria developed special mechanisms of non-photochemical quenching (NPQ) of excitation energy in phycobilisomes. In Synechocystis, NPQ is triggered by the orange carotenoid protein (OCP), which is sensitive to blue-green illumination allowing it to bind to the phycobilisome reducing the flow of energy to the photosystems. Consequent decoupling of OCP and recovery of phycobilisome fluorescence in vivo is controlled by the so called fluorescence recovery protein (FRP). In this work, the role of the phycobilisome core components, apcD and apcF, in non-photochemical quenching and subsequent fluorescence recovery in the phycobilisomes of the cyanobacterium Synechocystis sp. PCC6803 has been investigated. Using a single photon counting technique, we have registered fluorescence decay spectra with picosecond time resolution during fluorescence recovery. In order to estimate the activation energy for the photocycle, spectroscopic studies in dependency on the temperature from 5 to 45 °C have been performed. It was found that fluorescence quenching and recovery were strongly temperature dependent for all strains exhibiting characteristic non-linear time courses. The rise of the fluorescence intensity during fluorescence recovery after NPQ can be completely described by the increase of the phycobilisome core fluorescence lifetime. It was shown that fluorescence recovery of apcD- and apcF-deficient mutants is characterized by a significantly lower activation energy barrier compared to wild type. This phenomenon indicates that apcD and apcF gene products may be required for proper interaction of FRP and OCP coupled to the phycobilisome core. In addition, we found that the rate of fluorescence recovery decreases with an increase of the non-photochemical quenching amplitude, probably due to depletion of substrate for the enzymatic reaction catalyzed by FRP.
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Affiliation(s)
- E G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia,
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Maksimov EG, Schmitt FJ, Tsoraev GV, Ryabova AV, Friedrich T, Paschenko VZ. Fluorescence quenching in the lichen Peltigera aphthosa due to desiccation. Plant Physiol Biochem 2014; 81:67-73. [PMID: 24485218 DOI: 10.1016/j.plaphy.2014.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 01/09/2014] [Indexed: 06/03/2023]
Abstract
Photoprotective mechanisms were studied on the tripartite lichen Peltigera aphthosa that exhibits external cephalodia. Using the methods of steady-state and time-resolved fluorescence microscopy, we studied the dynamics of the rehydration process in different parts of the lichen thalli. It was found that apical, medial and basal parts of the thallus are not only morphologically different, but also show completely different chlorophyll induction curves and other spectral characteristics. In dry state, significant contribution to the fluorescence spectrum of lichen gives a green fluorescence of hyphae forming the upper crust, which is rapidly and almost completely quenched during the rehydration process. Probably this is one of the protective mechanisms that reduce the amount of light reaching the PS II reaction centers in the dry state. In the process of rehydration, we observed an increase in the intensity of the chlorophyll fluorescence of the photobiont at 680 nm, with significant changes of the fluorescence lifetimes and the amplitude ratios of fast and slow components of fluorescence decay kinetics. While in dry state, chlorophyll fluorescence is strongly quenched (opposite to the fluorescence of the hyphae), and the fluorescence time constants recover to the typical decay times of active photosynthetic organisms during rehydration. The quantitative behavior of these changes differs largely between the apical, medial and basal parts of the thallus, probably due to the complex interactions of the fungus, algae and cyanobacteria.
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Affiliation(s)
- E G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia.
| | - F-J Schmitt
- Institute of Chemistry, Biophysical Chemistry, Berlin Institute of Technology, 10623 Berlin, Germany
| | - G V Tsoraev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - A V Ryabova
- A.M.Prokhorov General Physics Institute RAS, 119991 Moscow, Russia
| | - T Friedrich
- Institute of Chemistry, Biophysical Chemistry, Berlin Institute of Technology, 10623 Berlin, Germany
| | - V Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
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Belyaeva NE, Schmitt FJ, Paschenko VZ, Riznichenko GY, Rubin AB, Renger G. Model based analysis of transient fluorescence yield induced by actinic laser flashes in spinach leaves and cells of green alga Chlorella pyrenoidosa Chick. Plant Physiol Biochem 2014; 77:49-59. [PMID: 24556534 DOI: 10.1016/j.plaphy.2014.01.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 01/25/2014] [Indexed: 06/03/2023]
Abstract
Measurements of Single Flash Induced Transient Fluorescence Yield (SFITFY) on spinach leaves and whole cells of green thermophilic alga Chlorella pyrenoidosa Chick were analyzed for electron transfer (ET) steps and coupled proton transfer (PT) on both the donor and the acceptor side of the reaction center (RC) of photosystem II (PS II). A specially developed PS II model (Belyaeva et al., 2008, 2011a) allowed the determination of ET steps that occur in a hierarchically ordered time scale from nanoseconds to several seconds. Our study demonstrates that our SFITFY data is consistent with the concept of the reduction of P680(+) by YZ in both leaves and algae (studied on spinach leaves and cells of Chlorella pyrenoidosa Chick). The multiphasic P680(+) reduction kinetics by YZ in PS II core complexes with high oxygen evolution capacity was seen in both algae and leaves. Model simulation to fit SFITFY curves for dark adapted species used here gives the rate constants to verify nanosecond kinetic stages of P680(+) reduction by YZ in the redox state S1 of the water oxidizing complex (WOC) shown in Kühn et al. (2004). Then a sequence of relaxation steps in the redox state S1, outlined by Renger (2012), occurs in both algae and leaves as a similar non-adiabatic ET reactions. Coupled PT is discussed briefly to understand a rearrangement of hydrogen bond protons in the protein matrix of the WOC (Umena et al., 2011). On the other hand, present studies showed a slower reoxidation of reduced QA by QB in algal cells as compared with that in a leaf that might be regarded as a consequence of differences of spatial domains at the QB-site in leaves compared to algae. Our comparative study helped to correlate theory with experimental data for molecular photosynthetic mechanisms in thylakoid membranes.
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Affiliation(s)
- N E Belyaeva
- Department of Biophysics, Biology Faculty, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia.
| | - F-J Schmitt
- Technical University Berlin, Institute of Chemistry, Max-Volmer-Laboratory of Biophysical Chemistry, Straβe des 17. Juni 135, D-10623 Berlin, Germany
| | - V Z Paschenko
- Department of Biophysics, Biology Faculty, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - G Yu Riznichenko
- Department of Biophysics, Biology Faculty, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - A B Rubin
- Department of Biophysics, Biology Faculty, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - G Renger
- Department of Biophysics, Biology Faculty, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia; Technical University Berlin, Institute of Chemistry, Max-Volmer-Laboratory of Biophysical Chemistry, Straβe des 17. Juni 135, D-10623 Berlin, Germany
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Maksimov EG, Schmitt FJ, Shirshin EA, Svirin MD, Elanskaya IV, Friedrich T, Fadeev VV, Paschenko VZ, Rubin AB. The time course of non-photochemical quenching in phycobilisomes of Synechocystis sp. PCC6803 as revealed by picosecond time-resolved fluorimetry. Biochim Biophys Acta 2014; 1837:1540-7. [PMID: 24463052 DOI: 10.1016/j.bbabio.2014.01.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 12/25/2013] [Accepted: 01/15/2014] [Indexed: 11/29/2022]
Abstract
As high-intensity solar radiation can lead to extensive damage of the photosynthetic apparatus, cyanobacteria have developed various protection mechanisms to reduce the effective excitation energy transfer (EET) from the antenna complexes to the reaction center. One of them is non-photochemical quenching (NPQ) of the phycobilisome (PB) fluorescence. In Synechocystis sp. PCC6803 this role is carried by the orange carotenoid protein (OCP), which reacts to high-intensity light by a series of conformational changes, enabling the binding of OCP to the PBs reducing the flow of energy into the photosystems. In this paper the mechanisms of energy migration in two mutant PB complexes of Synechocystis sp. were investigated and compared. The mutant CK is lacking phycocyanin in the PBs while the mutant ΔPSI/PSII does not contain both photosystems. Fluorescence decay spectra with picosecond time resolution were registered using a single photon counting technique. The studies were performed in a wide range of temperatures - from 4 to 300 K. The time course of NPQ and fluorescence recovery in darkness was studied at room temperature using both steady-state and time-resolved fluorescence measurements. The OCP induced NPQ has been shown to be due to EET from PB cores to the red form of OCP under photon flux densities up to 1000 μmolphotonsm⁻²s⁻¹. The gradual changes of the energy transfer rate from allophycocyanin to OCP were observed during the irradiation of the sample with blue light and consequent adaptation to darkness. This fact was interpreted as the revelation of intermolecular interaction between OCP and PB binding site. At low temperatures a significantly enhanced EET from allophycocyanin to terminal emitters has been shown, due to the decreased back transfer from terminal emitter to APC. The activation of OCP not only leads to fluorescence quenching, but also affects the rate constants of energy transfer as shown by model based analysis of the decay associated spectra. The results indicate that the ability of OCP to quench the fluorescence is strongly temperature dependent. This article is part of a special issue entitled: photosynthesis research for sustainability: keys to produce clean energy.
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Affiliation(s)
- E G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia.
| | - F-J Schmitt
- Institute of Chemistry, Biophysical Chemistry, TU Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - E A Shirshin
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - M D Svirin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - I V Elanskaya
- Department of Genetics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - T Friedrich
- Institute of Chemistry, Biophysical Chemistry, TU Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - V V Fadeev
- Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - V Z Paschenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - A B Rubin
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
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Schmitt FJ, Maksimov EG, Hätti P, Weißenborn J, Jeyasangar V, Razjivin AP, Paschenko VZ, Friedrich T, Renger G. Coupling of different isolated photosynthetic light harvesting complexes and CdSe/ZnS nanocrystals via Förster resonance energy transfer. Biochim Biophys Acta 2012; 1817:1461-70. [PMID: 22503663 DOI: 10.1016/j.bbabio.2012.03.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 03/28/2012] [Accepted: 03/28/2012] [Indexed: 11/18/2022]
Abstract
The present work describes results obtained on hybrid systems formed in aqueous buffer solution by self-assembly of different CdSe quantum dots (QDs) surrounded by a ZnS shell and functionalized by covering the surface with anionic and cationic groups and various isolated pigment-protein complexes from the light-harvesting antennae of photosynthetic organisms (light-harvesting complexes 1 and 2 (LH1 and LH2, respectively) from purple bacteria, phycobiliproteins (PBPs) from cyanobacteria and the rod-shaped PBP from the cyanobacterium Acaryochloris marina). Excitation energy transfer (EET) from QDs to PBP rods was found to take place with varying and highly temperature-dependent efficiencies of up to 90%. Experiments performed at room temperature on hybrid systems with different QDs show that no straightforward correlation exists between the efficiency of EET and the parameter J/(R(12)(6)) given by the theory of Förster resonance energy transfer (FRET), where J is the overlap integral of the normalized QD emission and PBP absorption and R(12) the distance between the transition dipole moments of donor and acceptor. The results show that the hybrid systems cannot be described as randomly orientated aggregates consisting of QDs and photosynthetic pigment-protein complexes. Specific structural parameters are inferred to play an essential role. The mode of binding and coupling seems to change with the size of QDs and with temperature. Efficient EET and fluorescence enhancement of the acceptor was observed at particular stoichiometric ratios between QDs and trimeric phycoerythrin (PE). At higher concentrations of PE, a quenching of its fluorescence is observed in the presence of QDs. This effect is explained by the existence of additional quenching channels in aggregates formed within hybrid systems. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.
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Affiliation(s)
- F-J Schmitt
- Institute of Chemistry, Biophysical Chemistry, Berlin Institute of Technology, Berlin, Germany.
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Paschenko VZ, Gorokhov VV, Korvatovskiy BN, Bocharov EA, Knox PP, Sarkisov OM, Theiss C, Eichler HJ, Renger G, Rubin AB. The rate of Q(x)→Q(y) relaxation in bacteriochlorophylls of reaction centers from Rhodobacter sphaeroides determined by kinetics of the ultrafast carotenoid bandshift. Biochim Biophys Acta 2012; 1817:1399-406. [PMID: 22366029 DOI: 10.1016/j.bbabio.2012.02.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 01/23/2012] [Accepted: 02/07/2012] [Indexed: 10/14/2022]
Abstract
Transient absorption changes induced by excitation of isolated reaction centers (RCs) from Rhodobacter sphaeroides with 600nm laser pulses of 20fs (full width at half maximum) were monitored in the wavelength region of 420-560nm. The spectral features of the spectrum obtained are characteristic for an electrochromic band shift of the single carotenoid (Car) molecule spheroidene, which is an integral constituent of these RCs. This effect is assigned to an electrochromic bandshift of Car due to the local electric field of the dipole moment formed by electronic excitation of bacteriochlorophyll (BChl) molecule(s) in the neighborhood of Car. Based on the known distances between the pigments, the monomeric BChl (B(B)) in the inactive B-branch is inferred to dominate this effect. The excitation of B(B) at 600nm leads to a transition into the S(2) state (Q(x) band), which is followed by rapid internal conversion to the S(1) state (Q(y) band), thus leading to a change of strength and orientation of the dipole moment, i.e., of the electric field acting on the Car molecule. Therefore, the time course of the electrochromic bandshift reflects the rate of the internal conversion from S(2) to S(1) of B(B). The evaluation of the kinetics leads to a value of 30fs for this relaxation process. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.
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Affiliation(s)
- Vladimir Z Paschenko
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, Moscow, Russia.
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Maksimov EG, Kuzminov FI, Konyuhov IV, Elanskaya IV, Paschenko VZ. Photosystem 2 effective fluorescence cross-section of cyanobacterium Synechocystis sp. PCC6803 and its mutants. Journal of Photochemistry and Photobiology B: Biology 2011; 104:285-91. [DOI: 10.1016/j.jphotobiol.2011.02.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 02/08/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
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Paschenko VZ, Gorokhov VV, Korvatovsky BN, Knox PP, Zakharova NI, Teiss C, Eichler HJ, Renger G, Sarkisov OM, Rubin AB. Electrochemical shift of the carotenoid molecule absorption band as an indicator of processes of energy migration in the reaction center of Rhodobacter sphaeroides. DOKL BIOCHEM BIOPHYS 2010; 434:257-61. [PMID: 20960251 DOI: 10.1134/s1607672910050108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Indexed: 11/23/2022]
Affiliation(s)
- V Z Paschenko
- Department of Biophysics, Faculty of Biology, Moscow State University, Moscow, 119991, Russia
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Belyaeva NE, Schmitt FJ, Steffen R, Paschenko VZ, Riznichenko GY, Chemeris YK, Renger G, Rubin AB. PS II model-based simulations of single turnover flash-induced transients of fluorescence yield monitored within the time domain of 100 ns-10 s on dark-adapted Chlorella pyrenoidosa cells. Photosynth Res 2008; 98:105-19. [PMID: 18937044 DOI: 10.1007/s11120-008-9374-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Accepted: 09/24/2008] [Indexed: 05/24/2023]
Abstract
The set up described in Steffen et al. (Biochemistry 40:173-180, 2001) was used to monitor in the time domain from 100 ns to 10 s single turnover flash-induced transients of the normalized fluorescence yield (SFITFY) on dark-adapted cells of the thermophilic algae Chlorella pyrenoidosa Chick. Perfect data fit was achieved within the framework of a previously proposed model for the PS II reaction pattern (Lebedeva et al., Biophysics 47:968-980, 2002; Belyaeva et al., Biophysics 51:860-872, 2006) after its modification by taking into account nonradiative decay processes including nonphotochemical quenching due to time-dependent populations of P680(+*) and (3)Car. On the basis of data reported in the literature, a consistent set of rate constants was obtained for electron transfer at the donor and acceptor sides of PS II, pH in lumen and stroma, the initial redox state of plastoquinone pool and the rate of plastoquinone oxidation. The evaluation of the rate constant values of dissipative processes due to quenching by carotenoid triplets in antennae and P680(+*)Q(A)(-*) recombination as well as the initial state populations after excitation with a single laser flash are close to that outlined in (Steffen et al., Biochemistry 44:3123-3133, 2005a). The simulations based on the model of the PS II reaction pattern provide information on the time courses of population probabilities of different PS II states. We analyzed the maximum (F(m)(STF)) and minimum (F(0)) of the normalized FL yield dependence on the rate of the recombination processes (radiative and dissipative nonradiative) and of P680(+*) reduction. The developed PS II model provides a basis for theoretical comparative analyses of time-dependent fluorescence signals, observed at different photosynthetic samples under various conditions (e.g. presence of herbicides, other stress conditions, excitation with actinic pulses of different intensity, and duration).
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Affiliation(s)
- N E Belyaeva
- Department of Biophysics, Biology Faculty of the M.V. Lomonosov Moscow State University, 119992 Moscow, Russia.
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Krasilnikov PM, Mamonov PA, Knox PP, Paschenko VZ, Rubin AB. The influence of hydrogen bonds on electron transfer rate in photosynthetic RCs. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2007; 1767:541-9. [PMID: 17442262 DOI: 10.1016/j.bbabio.2007.02.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2006] [Revised: 02/13/2007] [Accepted: 02/21/2007] [Indexed: 10/23/2022]
Abstract
Hydrogen bonds formed between photosynthetic reaction centers (RCs) and their cofactors were shown to affect the efficacy of electron transfer. The mechanism of such influence is determined by sensitivity of hydrogen bonds to electron density rearrangements, which alter hydrogen bonds potential energy surface. Quantum chemistry calculations were carried out on a system consisting of a primary quinone Q(A), non-heme Fe(2+) ion and neighboring residues(.) The primary quinone forms two hydrogen bonds with its environment, one of which was shown to be highly sensitive to the Q(A) state. In the case of the reduced primary quinone two stable hydrogen bond proton positions were shown to exist on [Q(A)-His(M219)] hydrogen bond line, while there is only one stable proton position in the case of the oxidized primary quinone. Taking into account this fact and also the ability of proton to transfer between potential energy wells along a hydrogen bond, theoretical study of temperature dependence of hydrogen bond polarization was carried out. Current theory was successfully applied to interpret dark P(+)/Q(A)(-) recombination rate temperature dependence.
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Affiliation(s)
- P M Krasilnikov
- Biological faculty, M.V. Lomonosov Moscow State University, 119899 Moscow, Vorob'evy Gory, Russia
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Volgusheva AA, Zagidullin VE, Antal TK, Korvatovsky BN, Krendeleva TE, Paschenko VZ, Rubin AB. Examination of chlorophyll fluorescence decay kinetics in sulfur deprived algae Chlamydomonas reinhardtii. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2007; 1767:559-64. [PMID: 17543273 DOI: 10.1016/j.bbabio.2007.04.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2006] [Revised: 04/17/2007] [Accepted: 04/24/2007] [Indexed: 11/17/2022]
Abstract
Chlorophyll fluorescence decay kinetics was measured in sulfur deprived cells of green alga Chlamydomonas reinhardtii with a home made picosecond fluorescence laser spectrometer. The measurements were carried out on samples either shortly adapted to the dark ('Fo conditions') or treated to reduce Qa ('Fm conditions'). Bi-exponential fitting of decay kinetics was applied to distinguish two components one of them related to energy trapping (fast component) and the other to charge stabilization and recombination in PS 2 reaction centers (slow component). It was found that the slow component yield increased by 2.0 and 1.2 times when measured under 'Fo' and 'Fm conditions', respectively, in sulfur deprived cells as compared to control ones. An additional rapid rise of the slow component yield was observed when incubation was carried out in a sealed bioreactor and cell culture turned to anaerobic conditions. The obtained results strongly indicate the existence of the redox control of PS 2 activity during multiphase adaptation of C. reinhardtii to sulfur deficiency stress. Probable mechanisms responsible for the observed increased recombinant fluorescence yield in starved cells are discussed.
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Affiliation(s)
- A A Volgusheva
- Biological Faculty, Moscow State University, Vorobyevi Gory 119992, Moscow, Russia
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Mikhailyuk IK, Knox PP, Paschenko VZ, Razjivin AP, Lokstein H. Analysis of absorption spectra of purple bacterial reaction centers in the near infrared region by higher order derivative spectroscopy. Biophys Chem 2006; 122:16-26. [PMID: 16513249 DOI: 10.1016/j.bpc.2006.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2005] [Revised: 02/09/2006] [Accepted: 02/09/2006] [Indexed: 11/17/2022]
Abstract
Reaction centers (RCs) of purple bacteria are uniquely suited objects to study the mechanisms of the photosynthetic conversion of light energy into chemical energy. A recently introduced method of higher order derivative spectroscopy [I.K. Mikhailyuk, H. Lokstein, A.P. Razjivin, A method of spectral subband decomposition by simultaneous fitting the initial spectrum and a set of its derivatives, J. Biochem. Biophys. Methods 63 (2005) 10-23] was used to analyze the NIR absorption spectra of RC preparations from Rhodobacter (R.) sphaeroides strain 2R and Blastochloris (B.) viridis strain KH, containing bacteriochlorophyll (BChl) a and b, respectively. Q(y) bands of individual RC porphyrin components (BChls and bacteriopheophytins, BPheo) were identified. The results indicate that the upper exciton level P(y+) of the photo-active BChl dimer in RCs of R. sphaeroides has an absorption maximum of 810nm. The blue shift of a complex integral band at approximately 800nm upon oxidation of the RC is caused primarily by bleaching of P(y+), rather than by an electrochromic shift of the absorption band(s) of the monomeric BChls. Likewise, the disappearance of a band peaking at 842nm upon oxidation of RCs from B. viridis indicates that this band has to be assigned to P(y+). A blue shift of an absorption band at approximately 830nm upon oxidation of RCs of B. viridis is also essentially caused by the disappearance of P(y+), rather than by an electrochromic shift of the absorption bands of monomeric BChls. Absorption maxima of the monomeric BChls, B(B) and B(A) are at 802 and 797nm, respectively, in RCs of R. sphaeroides at room temperature. BPheo co-factors H(B) and H(A) peak at 748 and 758nm, respectively, at room temperature. For B. viridis RCs the spectral positions of H(B) and H(A) were found to be 796 and 816nm, respectively, at room temperature.
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Affiliation(s)
- I K Mikhailyuk
- A.N. Belozerski Institute of Physico-Chemical Biology, Biology Faculty of the M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
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Paschenko VZ, Gorokhov VV, Korvatovskii BN, Grishanova NP, Sarkisov OM, Renger G, Rubin AB. Femtosecond dynamics of transition processes in reaction centers of Rhodobacter sphaeroides. DOKL BIOCHEM BIOPHYS 2005; 399:337-40. [PMID: 15714939 DOI: 10.1007/s10628-005-0001-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- V Z Paschenko
- Department of Biophysics, Biological Faculty, Moscow State University, Vorob'evy gory, Moscow, 117234 Russia
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Paschenko VZ, Gorokhov VV, Knox PP, Krasilnikov PM, Redlin H, Renger G, Rubin AB. Energetics and mechanisms of high efficiency of charge separation and electron transfer processes in Rhodobacter sphaeroides reaction centers. Bioelectrochemistry 2003; 61:73-84. [PMID: 14642912 DOI: 10.1016/s1567-5394(03)00077-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Effects of environmental changes due to D(2)O/H(2)O substitution and cryosolvent addition on the energetics of the special pair and the rate constants of forward and back electron transfer reactions in the picosecond-nanosecond time domain have been studied in isolated reaction centers (RC) of the anaxogenic purple bacterium Rhodobacter sphaeroides. The following results were obtained: (i). replacement of H(2)O by D(2)O or addition of either 70% (v/v) glycerol or 35% (v/v) DMSO do not influence the absorption spectra; (ii). in marked contrast to this invariance of absorption, the maxima of fluorescence spectra are red shifted relative to control by 3.5, 6.8 and 14.5 nm for RCs suspended in glycerol, D(2)O or DMSO, respectively; (iii). D(2)O/H(2)O substitution or DMSO addition give rise to an increase of the time constants of charge separation (tau(e)), and Q(A)(-) formation (tau(Q)) by a factors of 2.5-3.1 and 1.7-2.5, respectively; (iv). addition of 70% glycerol is virtually without effect on the values of tau(e) and tau(Q); (v). the midpoint potential E(m) of P/P(+) is shifted by about 30 and 45 mV towards higher values by addition of 70% glycerol and 35% DMSO, respectively, but remains invariant to D(2)O/H(2)O exchange; and (vi). an additional fast component with tau(1)=0.5-0.8 ns in the kinetics of charge recombination P(+)H(A)(-)-->P*(P)H(A) emerges in RC suspensions modified either by D(2)O/H(2)O substitution or by DMSO treatment. The results have been analysed with special emphasis on the role of deformations of hydrogen bonds for the solvation mechanism of nonequilibrium states of cofactors. Reorientation of hydrogen bonds provides the major contribution of the very fast environmental response to excitation of the special pair P. The Gibbs standard free energy gap between 1P* and P(+)B(A)(-) due to solvation is estimated to be approximately 70, 59 and 48 meV for control, D(2)O- and DMSO-treated RC samples, respectively.
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Affiliation(s)
- Vladimir Z Paschenko
- Department of Biophysics, Biology Faculty, Lomonosov State University, Moscow 119899, Russia.
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Gorokhov VV, Paschenko VZ, Knox PP, Rubin AB. Contribution of the processes of solvation of nonequilibrium states of cofactors to charge separation and electron transfer in reaction centers of Rhodobacter sphaeroides. DOKL BIOCHEM BIOPHYS 2002; 384:163-6. [PMID: 12134513 DOI: 10.1023/a:1016076331697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- V V Gorokhov
- Moscow State University, Vorob'evy gory, Moscow, 119992 Russia
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48
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Paschenko VZ, Korvatovskii BN, Kononenko AA, Chamorovsky SK, Rubin AB. Estimation of the rate of photochemical charge separation in Rhodopseudomonas sphaeroides
reaction centers by fluorescence and absorption picosecond spectroscopy. FEBS Lett 2001. [DOI: 10.1016/0014-5793(85)80017-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Paschenko VZ, Knox PP, Chamorovsky SK, Krasilnikov PM, Mamedov MD, Semenov AY, Zakharova NI, Renger G, Rubin AB. Effect of D2O and cryosolvents on the redox properties of bacteriochlorophyll dimer and electron transfer processes in Rhodobacter sphaeroides reaction centers. Bioelectrochemistry 2001; 53:233-41. [PMID: 11339312 DOI: 10.1016/s0302-4598(01)00098-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Effects of environmental changes on the reaction pattern of excitation energy trapping and transformation into the "stable" radical pair P+Q(A)-, have been analyzed in isolated reaction centers of the anoxygenic purple bacterium Rhodobacter sphaeroides. The following results were obtained: (a) replacement of exchangeable protons by deuterons significantly retarded the electron transfer steps of primary charge separation, leading to the radical pair P+I- and of the subsequent reoxidation of I- by the quinone acceptor Q(A) but has virtually no effect on the midpoint potential of P/P+ that was found to be 430+/-20 mV; (b) addition of 70% (v/v) glycerol causes a shift of Em by about 30 mV towards higher values whereas the kinetics of the electron transfer reactions remain almost unaffected; (c) in the presence of the cryoprotectant DMSO, a combined effect arises, i.e. a retardation of the electron transfer kinetics comparable to that induced by H/D exchange and simultaneously an upshift of the Em value to 475+/-20 mV, resembling the action of glycerol. These results are discussed within the framework of effects on the midpoint potential due to the dielectric constant of the medium and changes of the charge distribution in the vicinity of the redox groups and the influence of relaxation processes on electron transfer reactions.
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Affiliation(s)
- V Z Paschenko
- Department of Biophysics, Biology Faculty, Lomonosov State University, Moscow, Russia.
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Paschenko VZ, Evstigneeva RP, Gorokhov VV, Luzgina VN, Tusov VB, Rubin AB. Photophysical properties of carborane-containing derivatives of 5,10,15,20-tetra(p-aminophenyl)porphyrin. J Photochem Photobiol B 2000; 54:162-7. [PMID: 10836547 DOI: 10.1016/s1011-1344(00)00011-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Absorption, fluorescence emission, fluorescence excitation spectra and fluorescence decay kinetics of carborane derivatives of 5,10,15,20-tetra(p-aminophenyl)porphyrin have been investigated. Carborane derivatives are prepared by acylation of the amino groups of 5,10,15,20-tetra(p-aminophenyl)porphyrin by 9-carboranyl acetyl chloride. From the analysis of the absorption and fluorescence spectra, it is concluded that covalent linking of carborane molecules to the tetraphenylporphyrin molecule significantly changes the self-conjugated pi-system of the porphyrin macrocycle: positions of maxima of absorption and fluorescence spectra shift to the red region by 3-8 nm; the halfwidths of these bands are broadened by 2.5-5.0 nm; the relative intensity of the bands I-IV also changes. The fluorescence decay kinetics of the carborane derivatives are biexponential. According to the experimental data and model simulation, it is concluded that the intramolecular electron transfer proceeds from the porphyrin excited part of the molecule to carboranyls with a rate constant of 415 ps(-1) and efficiency of 0.16-0.8. Recombination of separated charges occurs within 1.4 ns.
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Affiliation(s)
- V Z Paschenko
- Biology Department of Moscow State University, Russian Federation.
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