1
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Schmitt FJ, Friedrich T. Adaptation processes in Halomicronema hongdechloris, an example of the light-induced optimization of the photosynthetic apparatus on hierarchical time scales. FRONTIERS IN PLANT SCIENCE 2024; 15:1359195. [PMID: 39049856 PMCID: PMC11266139 DOI: 10.3389/fpls.2024.1359195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 06/04/2024] [Indexed: 07/27/2024]
Abstract
Oxygenic photosynthesis in Halomicronema hongdechloris, one of a series of cyanobacteria producing red-shifted Chl f, is adapted to varying light conditions by a range of diverse processes acting over largely different time scales. Acclimation to far-red light (FRL) above 700 nm over several days is mirrored by reversible changes in the Chl f content. In several cyanobacteria that undergo FRL photoacclimation, Chl d and Chl f are directly involved in excitation energy transfer in the antenna system, form the primary donor in photosystem I (PSI), and are also involved in electron transfer within photosystem II (PSII), most probably at the ChlD1 position, with efficient charge transfer happening with comparable kinetics to reaction centers containing Chl a. In H. hongdechloris, the formation of Chl f under FRL comes along with slow adaptive proteomic shifts like the rebuilding of the D1 complex on the time scale of days. On shorter time scales, much faster adaptation mechanisms exist involving the phycobilisomes (PBSs), which mainly contain allophycocyanin upon adaptation to FRL. Short illumination with white, blue, or red light leads to reactive oxygen species-driven mobilization of the PBSs on the time scale of seconds, in effect recoupling the PBSs with Chl f-containing PSII to re-establish efficient excitation energy transfer within minutes. In summary, H. hongdechloris reorganizes PSII to act as a molecular heat pump lifting excited states from Chl f to Chl a on the picosecond time scale in combination with a light-driven PBS reorganization acting on the time scale of seconds to minutes depending on the actual light conditions. Thus, structure-function relationships in photosynthetic energy and electron transport in H. hongdechloris including long-term adaptation processes cover 10-12 to 106 seconds, i.e., 18 orders of magnitude in time.
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Affiliation(s)
- Franz-Josef Schmitt
- Department of Physics, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
| | - Thomas Friedrich
- Department of Bioenergetics, Technische Universität Berlin, Institute of Chemistry PC 14, Berlin, Germany
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2
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Schmitt FJ, Hüls A, Moldenhauer M, Friedrich T. How electron tunneling and uphill excitation energy transfer support photochemistry in Halomicronema hongdechloris. PHOTOSYNTHESIS RESEARCH 2024; 159:273-289. [PMID: 38198121 DOI: 10.1007/s11120-023-01064-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 11/13/2023] [Indexed: 01/11/2024]
Abstract
Halomicronema hongdechloris, the first cyanobacterium reported to produce the red-shifted chlorophyll f (Chl f) upon acclimation to far-red light, demonstrates remarkable adaptability to diverse light conditions. The photosystem II (PS II) of this organism undergoes reversible changes in its Chl f content, ranging from practically zero under white-light culture conditions to a Chl f: Chl a ratio of up to 1:8 when exposed to far-red light (FRL) of 720-730 nm for several days. Our ps time- and wavelength-resolved fluorescence data obtained after excitation of living H. hongdechloris cells indicate that the Soret band of a far-red (FR) chlorophyll involved in charge separation absorbs around 470 nm. At 10 K, the fluorescence decay at 715-720 nm is still fast with a time constant of 165 ps indicating an efficient electron tunneling process. There is efficient excitation energy transfer (EET) from 715-720 nm to 745 nm with the latter resulting from FR Chl f, which mainly functions as light-harvesting pigment upon adaptation to FRL. From there, excitation energy reaches the primary donor in the reaction center of PS II with an energetic uphill EET mechanism inducing charge transfer. The fluorescence data are well explained with a secondary donor PD1 represented by a red-shifted Chl a molecule with characteristic fluorescence around 715 nm and a more red-shifted FR Chl f with fluorescence around 725 nm as primary donor at the ChlD1 or PD2 position.
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Affiliation(s)
- Franz-Josef Schmitt
- Department of Physics, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120, Halle (Saale), Germany.
| | - Anne Hüls
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Marcus Moldenhauer
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Thomas Friedrich
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
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3
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Sluchanko NN, Maksimov EG, Slonimskiy YB, Varfolomeeva LA, Bukhanko AY, Egorkin NA, Tsoraev GV, Khrenova MG, Ge B, Qin S, Boyko KM, Popov VO. Structural framework for the understanding spectroscopic and functional signatures of the cyanobacterial Orange Carotenoid Protein families. Int J Biol Macromol 2024; 254:127874. [PMID: 37939760 DOI: 10.1016/j.ijbiomac.2023.127874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/23/2023] [Accepted: 11/01/2023] [Indexed: 11/10/2023]
Abstract
The Orange Carotenoid Protein (OCP) is a unique photoreceptor crucial for cyanobacterial photoprotection. Best studied Synechocystis sp. PCC 6803 OCP belongs to the large OCP1 family. Downregulated by the Fluorescence Recovery Protein (FRP) in low-light, high-light-activated OCP1 binds to the phycobilisomes and performs non-photochemical quenching. Recently discovered families OCP2 and OCP3 remain structurally and functionally underexplored, and no systematic comparative studies have ever been conducted. Here we present two first crystal structures of OCP2 from morphoecophysiologically different cyanobacteria and provide their comprehensive structural, spectroscopic and functional comparison with OCP1, the recently described OCP3 and all-OCP ancestor. Structures enable correlation of spectroscopic signatures with the effective number of hydrogen and discovered here chalcogen bonds anchoring the ketocarotenoid in OCP, as well as with the rotation of the echinenone's β-ionone ring in the CTD. Structural data also helped rationalize the observed differences in OCP/FRP and OCP/phycobilisome functional interactions. These data are expected to foster OCP research and applications in optogenetics, targeted carotenoid delivery and cyanobacterial biomass engineering.
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Affiliation(s)
- Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia.
| | - Eugene G Maksimov
- M.V. Lomonosov Moscow State University, Faculty of Biology, Moscow 119991, Russia
| | - Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Larisa A Varfolomeeva
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Antonina Y Bukhanko
- M.V. Lomonosov Moscow State University, Faculty of Biology, Moscow 119991, Russia
| | - Nikita A Egorkin
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia; M.V. Lomonosov Moscow State University, Faculty of Biology, Moscow 119991, Russia
| | - Georgy V Tsoraev
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Maria G Khrenova
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia; Lomonosov Moscow State University, Chemistry Department, Moscow 119991, Russia
| | - Baosheng Ge
- China University of Petroleum (Huadong), College of Chemistry and Chemical Engineering, Qingdao 266580, People's Republic of China
| | - Song Qin
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, People's Republic of China.
| | - Konstantin M Boyko
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Vladimir O Popov
- A.N. Bach Institute of Biochemistry, Federal Research Centre of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia; M.V. Lomonosov Moscow State University, Faculty of Biology, Moscow 119991, Russia
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4
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Zlenko DV, Protasova EA, Tsoraev GV, Sluchanko NN, Cherepanov DA, Friedrich T, Ge B, Qin S, Maksimov EG, Rubin AB. Anti-stokes fluorescence of phycobilisome and its complex with the orange carotenoid protein. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2024; 1865:149014. [PMID: 37739300 DOI: 10.1016/j.bbabio.2023.149014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/06/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
Phycobilisomes (PBSs) are giant water-soluble light-harvesting complexes of cyanobacteria and red algae, consisting of hundreds of phycobiliproteins precisely organized to deliver the energy of absorbed light to chlorophyll chromophores of the photosynthetic electron-transport chain. Quenching the excess of excitation energy is necessary for the photoprotection of photosynthetic apparatus. In cyanobacteria, quenching of PBS excitation is provided by the Orange Carotenoid Protein (OCP), which is activated under high light conditions. In this work, we describe parameters of anti-Stokes fluorescence of cyanobacterial PBSs in quenched and unquenched states. We compare the fluorescence readout from entire phycobilisomes and their fragments. The obtained results revealed the heterogeneity of conformations of chromophores in isolated phycobiliproteins, while such heterogeneity was not observed in the entire PBS. Under excitation by low-energy quanta, we did not detect a significant uphill energy transfer from the core to the peripheral rods of PBS, while the one from the terminal emitters to the bulk allophycocyanin chromophores is highly probable. We show that this direction of energy migration does not eliminate fluorescence quenching in the complex with OCP. Thus, long-wave excitation provides new insights into the pathways of energy conversion in the phycobilisome.
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Affiliation(s)
- Dmitry V Zlenko
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia; A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Moscow, Russia
| | - Elena A Protasova
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Georgy V Tsoraev
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Dmitry A Cherepanov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 142432 Moscow, Russia.; A.N. Belozersky Institute of Physical-Chemical Biology, Moscow State University, 119991 Moscow, Russia
| | - Thomas Friedrich
- Technical University of Berlin, Institute of Chemistry PC 14, D-10623 Berlin, Germany
| | - Baosheng Ge
- China University of Petroleum (Huadong), College of Chemical Engineering, Qingdao 266580, PR China
| | - Song Qin
- China University of Petroleum (Huadong), College of Chemical Engineering, Qingdao 266580, PR China; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China
| | - Eugene G Maksimov
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Andrew B Rubin
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
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5
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Rose JB, Gascón JA, Sutter M, Sheppard DI, Kerfeld CA, Beck WF. Photoactivation of the orange carotenoid protein requires two light-driven reactions mediated by a metastable monomeric intermediate. Phys Chem Chem Phys 2023; 25:33000-33012. [PMID: 38032096 DOI: 10.1039/d3cp04484j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
The orange carotenoid protein (OCP) functions as a sensor of the ambient light intensity and as a quencher of bilin excitons when it binds to the core of the cyanobacterial phycobilisome. We show herein that the photoactivation mechanism that converts the resting, orange-colored state, OCPO, to the active red-colored state, OCPR, requires a sequence of two reactions, each requiring absorption of a single photon by an intrinsic ketocarotenoid chromophore. Global analysis of absorption spectra recorded during continuous illumination of OCPO preparations from Synechocystis sp. PCC 6803 detects the reversible formation of a metastable intermediate, OCPI, in which the ketocarotenoid canthaxanthin exhibits an absorption spectrum with a partial red shift and a broadened vibronic structure compared to that of the OCPO state. While the dark recovery from OCPR to OCPI is a first-order, unimolecular reaction, the subsequent conversion of OCPI to the resting OCPO state is bimolecular, involving association of two OCPO monomers to form the dark-stable OCPO dimer aggregate. These results indicate that photodissociation of the OCPO dimer to form the monomeric OCPO intermediate is the first step in the photoactivation mechanism. Formation of the OCPO monomer from the dimer increases the mean value and broadens the distribution of the solvent-accessible surface area of the canthaxanthin chromophore measured in molecular dynamics trajectories at 300 K. The second step in the photoactivation mechanism is initiated by absorption of a second photon, by canthaxanthin in the OCPO monomer, which obtains the fully red-shifted and broadened absorption spectrum detected in the OCPR product state owing to displacement of the C-terminal domain and the translocation of canthaxanthin more than 12 Å into the N-terminal domain. Both steps in the photoactivation reaction of OCP are likely to involve changes in the structure of the C-terminal domain elicited by excited-state conformational motions of the ketocarotenoid.
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Affiliation(s)
- Justin B Rose
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, USA.
| | - José A Gascón
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, USA
| | - Markus Sutter
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824-1322, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Damien I Sheppard
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824-1322, USA
| | - Cheryl A Kerfeld
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824-1322, USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Warren F Beck
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, USA.
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6
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Tsoraev GV, Bukhanko AY, Mamchur AA, Yaroshevich IA, Sluchanko NN, Tseng HW, Moldenhauer M, Budisa N, Friedrich T, Maksimov EG. Intrinsic tryptophan fluorescence quenching by iodine in non-canonical amino acid reveals alteration of the hydrogen bond network in the photoactive orange carotenoid protein. Biochem Biophys Res Commun 2023; 683:149119. [PMID: 37862781 DOI: 10.1016/j.bbrc.2023.10.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 10/12/2023] [Indexed: 10/22/2023]
Abstract
The Orange Carotenoid Protein (OCP) regulates cyanobacterial photosynthetic activity through photoactivation in intense light. A hydrogen bonding network involving the keto-carotenoid oxygen and Y201 and W288 residues prevents the spontaneous activation of dark-adapted OCP. To investigate the role of the hydrogen bonds in OCP photocycling, we introduced non-canonical amino acids near the keto-carotenoid, particularly iodine at the meta-position of Y201. This modification significantly increased the yield of red OCP photoproducts, albeit with a shorter lifetime. Changes in tryptophan fluorescence during photocycling influenced by the presence of iodine near W288 revealed interactions between Y201 and W288 in the absence of the carotenoid in the C-domain. We propose that upon the relaxation of red states, a ternary complex with the carotenoid is formed. Analysis of spectral signatures and interaction energies indicates that the specific iodo-tyrosine configuration enhances interactions between the carotenoid and W288.
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Affiliation(s)
- Georgy V Tsoraev
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | | | | | | | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Hsueh-Wei Tseng
- Technical University of Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Marcus Moldenhauer
- Technical University of Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Nediljko Budisa
- Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Thomas Friedrich
- Technical University of Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Eugene G Maksimov
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
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7
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Arcidiacono A, Accomasso D, Cupellini L, Mennucci B. How orange carotenoid protein controls the excited state dynamics of canthaxanthin. Chem Sci 2023; 14:11158-11169. [PMID: 37860660 PMCID: PMC10583711 DOI: 10.1039/d3sc02662k] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 09/21/2023] [Indexed: 10/21/2023] Open
Abstract
Orange Carotenoid Protein (OCP) is a ketocarotenoid-binding protein essential for photoprotection in cyanobacteria. The main steps of the photoactivated conversion which converts OCP from its resting state to the active one have been extensively investigated. However, the initial photochemical event in the ketocarotenoid which triggers the large structural changes finally leading to the active state is still not understood. Here we employ QM/MM surface hopping nonadiabatic dynamics to investigate the excited-state decay of canthaxanthin in OCP, both in the ultrafast S2 to S1 internal conversion and the slower decay leading back to the ground state. For the former step we show the involvement of an additional excited state, which in the literature has been often named the SX state, and we characterize its nature. For the latter step, we reveal an excited state decay characterized by multiple timescales, which are related to the ground-state conformational heterogeneity of the ketocarotenoid. We assigned the slowly decaying population to the so-called S* state. Finally, we identify a minor decay pathway involving double-bond photoisomerization, which could be the initial trigger to photoactivation of OCP.
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Affiliation(s)
- Amanda Arcidiacono
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa Via G. Moruzzi 13 56124 Pisa Italy
| | - Davide Accomasso
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa Via G. Moruzzi 13 56124 Pisa Italy
| | - Lorenzo Cupellini
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa Via G. Moruzzi 13 56124 Pisa Italy
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa Via G. Moruzzi 13 56124 Pisa Italy
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8
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Pishchalnikov RY, Yaroshevich IA, Zlenko DV, Tsoraev GV, Osipov EM, Lazarenko VA, Parshina EY, Chesalin DD, Sluchanko NN, Maksimov EG. The role of the local environment on the structural heterogeneity of carotenoid β-ionone rings. PHOTOSYNTHESIS RESEARCH 2023; 156:3-17. [PMID: 36063303 DOI: 10.1007/s11120-022-00955-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
Our analysis of the X-ray crystal structure of canthaxanthin (CAN) showed that its ketolated β-ionone rings can adopt two energetically equal, but structurally distinct puckers. Quantum chemistry calculations revealed that the potential energy surface of the β-ionone ring rotation over the plane of the conjugated π-system in carotenoids depends on the pucker state of the β-ring. Considering different pucker states and β-ionone ring rotation, we found six separate local minima on the potential energy surface defining the geometry of the keto-β-ionone ring-two cis and one trans orientation for each of two pucker states. We observed a small difference in energy and no difference in relative orientation for the cis-minima, but a pronounced difference for the position of trans-minimum in alternative pucker configurations. An energetic advantage of β-ionone ring rotation from a specific pucker type can reach up to 8 kJ/mol ([Formula: see text]). In addition, we performed the simulation of linear absorption of CAN in hexane and in a unit cell of the CAN crystal. The electronic energies of [Formula: see text] transition were estimated both for the CAN monomer and in the CAN crystal. The difference between them reached [Formula: see text], which roughly corresponds to the energy gap between A and B pucker states predicted by theoretical estimations. Finally, we have discussed the importance of such effects for biological systems whose local environment determines conformational mobility, and optical/functional characteristics of carotenoid.
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Affiliation(s)
- Roman Y Pishchalnikov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov Str., 38, Moscow, Russia, 119991.
| | - Igor A Yaroshevich
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Dmitry V Zlenko
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
- A.N. Severtsov Institute of Ecology and Evolution (IEE), RAS, Moscow, Russia, 117071
| | - Georgy V Tsoraev
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Evgenii M Osipov
- Laboratory for Biocrystallography, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Vladimir A Lazarenko
- National Research Center "Kurchatov Institute", 1 Akademika Kurchatova Pl., Moscow, Russia, 123182
| | - Evgenia Yu Parshina
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Denis D Chesalin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov Str., 38, Moscow, Russia, 119991
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia, 119071
| | - Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
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9
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Tsoraev GV, Bukhanko A, Budylin GS, Shirshin EA, Slonimskiy YB, Sluchanko NN, Kloz M, Cherepanov DA, Shakina YV, Ge B, Moldenhauer M, Friedrich T, Golub M, Pieper J, Maksimov EG, Rubin AB. Stages of OCP-FRP Interactions in the Regulation of Photoprotection in Cyanobacteria, Part 1: Time-Resolved Spectroscopy. J Phys Chem B 2023; 127:1890-1900. [PMID: 36799909 DOI: 10.1021/acs.jpcb.2c07189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Most cyanobacteria utilize a water-soluble Orange Carotenoid Protein (OCP) to protect their light-harvesting complexes from photodamage. The Fluorescence Recovery Protein (FRP) is used to restore photosynthetic activity by inactivating OCP via dynamic OCP-FRP interactions, a multistage process that remains underexplored. In this work, applying time-resolved spectroscopy, we demonstrate that the interaction of FRP with the photoactivated OCP begins early in the photocycle. Interacting with the compact OCP state, FRP completely prevents the possibility of OCP domain separation and formation of the signaling state capable of interacting with the antenna. The structural element that prevents FRP binding and formation of the complex is the short α-helix at the beginning of the N-terminal domain of OCP, which masks the primary site in the C-terminal domain of OCP. We determined the rate of opening of this site and show that it remains exposed long after the relaxation of the red OCP states. Observations of the OCP transitions on the ms time scale revealed that the relaxation of the orange photocycle intermediates is accompanied by an increase in the interaction of the carotenoid keto group with the hydrogen bond donor tyrosine-201. Our data refine the current model of photoinduced OCP transitions and the interaction of its intermediates with FRP.
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Affiliation(s)
- Georgy V Tsoraev
- Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Antonina Bukhanko
- Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Gleb S Budylin
- Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia.,Laboratory of Clinical Biophotonics, Scientific and Technological Biomedical Park, Sechenov University, 119435 Moscow, Russia
| | - Evgeny A Shirshin
- Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Miroslav Kloz
- ELI-Beamlines, Institute of Physics, Dolní Břežany, 252 41 Czech Republic
| | - Dmitry A Cherepanov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 142432 Moscow, Russia.,A.N. Belozersky Institute of Physical-Chemical Biology, Moscow State University, 119991 Moscow, Russia
| | | | - Baosheng Ge
- China University of Petroleum (Huadong), College of Chemical Engineering, Qingdao 266580, PR China
| | - Marcus Moldenhauer
- Technische Universität Berlin, Institute of Chemistry PC14, 10623 Berlin, Germany
| | - Thomas Friedrich
- Technische Universität Berlin, Institute of Chemistry PC14, 10623 Berlin, Germany
| | - Maksym Golub
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Jörg Pieper
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Eugene G Maksimov
- Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Andrew B Rubin
- Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
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10
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Golub M, Moldenhauer M, Matsarskaia O, Martel A, Grudinin S, Soloviov D, Kuklin A, Maksimov EG, Friedrich T, Pieper J. Stages of OCP-FRP Interactions in the Regulation of Photoprotection in Cyanobacteria, Part 2: Small-Angle Neutron Scattering with Partial Deuteration. J Phys Chem B 2023; 127:1901-1913. [PMID: 36815674 DOI: 10.1021/acs.jpcb.2c07182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
We used small-angle neutron scattering partially coupled with size-exclusion chromatography to unravel the solution structures of two variants of the Orange Carotenoid Protein (OCP) lacking the N-terminal extension (OCP-ΔNTE) and its complex formation with the Fluorescence Recovery Protein (FRP). The dark-adapted, orange form OCP-ΔNTEO is fully photoswitchable and preferentially binds the pigment echinenone. Its complex with FRP consists of a monomeric OCP component, which closely resembles the compact structure expected for the OCP ground state, OCPO. In contrast, the pink form OCP-ΔNTEP, preferentially binding the pigment canthaxanthin, is mostly nonswitchable. The pink OCP form appears to occur as a dimer and is characterized by a separation of the N- and C-terminal domains, with the canthaxanthin embedded only into the N-terminal domain. Therefore, OCP-ΔNTEP can be viewed as a prototypical model system for the active, spectrally red-shifted state of OCP, OCPR. The dimeric structure of OCP-ΔNTEP is retained in its complex with FRP. Small-angle neutron scattering using partially deuterated OCP-FRP complexes reveals that FRP undergoes significant structural changes upon complex formation with OCP. The observed structures are assigned to individual intermediates of the OCP photocycle in the presence of FRP.
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Affiliation(s)
- Maksym Golub
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Marcus Moldenhauer
- Institute of Chemistry PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Olga Matsarskaia
- Institut Laue-Langevin, Avenue des Martyrs 71, 38042 Cedex 9 Grenoble, France
| | - Anne Martel
- Institut Laue-Langevin, Avenue des Martyrs 71, 38042 Cedex 9 Grenoble, France
| | - Sergei Grudinin
- Université Grenoble Alpes, CNRS, Grenoble INP, LJK, 38000 Grenoble, France
| | - Dmytro Soloviov
- Faculty of Physics, Adam Mickiewicz University, ul. Wieniawskiego 1, 61-712 Poznan, Poland.,Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, Kirova 36a, 07270 Chornobyl, Ukraine
| | - Alexander Kuklin
- Joint Institute for Nuclear Research, Joliot-Curie str. 6, 141980 Dubna, Russia.,Moscow Institute of Physics and Technology, Institutskiy per. 9, 141701 Dolgoprudny, Russia
| | - Eugene G Maksimov
- Department of Biophysics, M. V. Lomonosov Moscow State University, Vorob'jovy Gory 1-12, 119899 Moscow, Russia
| | - Thomas Friedrich
- Institute of Chemistry PC 14, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Jörg Pieper
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
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11
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Moldenhauer M, Tseng HW, Kraskov A, Tavraz NN, Yaroshevich IA, Hildebrandt P, Sluchanko NN, Hochberg GA, Essen LO, Budisa N, Korf L, Maksimov EG, Friedrich T. Parameterization of a single H-bond in Orange Carotenoid Protein by atomic mutation reveals principles of evolutionary design of complex chemical photosystems. Front Mol Biosci 2023; 10:1072606. [PMID: 36776742 PMCID: PMC9909426 DOI: 10.3389/fmolb.2023.1072606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/17/2023] [Indexed: 01/27/2023] Open
Abstract
Introduction: Dissecting the intricate networks of covalent and non-covalent interactions that stabilize complex protein structures is notoriously difficult and requires subtle atomic-level exchanges to precisely affect local chemical functionality. The function of the Orange Carotenoid Protein (OCP), a light-driven photoswitch involved in cyanobacterial photoprotection, depends strongly on two H-bonds between the 4-ketolated xanthophyll cofactor and two highly conserved residues in the C-terminal domain (Trp288 and Tyr201). Method: By orthogonal translation, we replaced Trp288 in Synechocystis OCP with 3-benzothienyl-L-alanine (BTA), thereby exchanging the imino nitrogen for a sulphur atom. Results: Although the high-resolution (1.8 Å) crystal structure of the fully photoactive OCP-W288_BTA protein showed perfect isomorphism to the native structure, the spectroscopic and kinetic properties changed distinctly. We accurately parameterized the effects of the absence of a single H-bond on the spectroscopic and thermodynamic properties of OCP photoconversion and reveal general principles underlying the design of photoreceptors by natural evolution. Discussion: Such "molecular surgery" is superior over trial-and-error methods in hypothesis-driven research of complex chemical systems.
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Affiliation(s)
- Marcus Moldenhauer
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Berlin, Germany
| | - Hsueh-Wei Tseng
- Department of Biocatalysis, Institute of Chemistry L1, Technische Universität Berlin, Berlin, Germany
| | - Anastasia Kraskov
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Berlin, Germany
| | - Neslihan N. Tavraz
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Berlin, Germany
| | - Igor A. Yaroshevich
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Peter Hildebrandt
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Berlin, Germany
| | - Nikolai N. Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center Fundamentals of Biotechnology of Russian Academy of Sciences, Moscow, Russia
| | - Georg A. Hochberg
- Max-Planck-Institute of Terrestrial Microbiology, Evolutionary Biochemistry Group, Marburg, Germany
| | - Lars-Oliver Essen
- Department of Chemistry and Unit for Structural Biology, Philipps-Universität Marburg, Marburg, Germany
| | - Nediljko Budisa
- Department of Biocatalysis, Institute of Chemistry L1, Technische Universität Berlin, Berlin, Germany,Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada
| | - Lukas Korf
- Department of Chemistry and Unit for Structural Biology, Philipps-Universität Marburg, Marburg, Germany
| | - Eugene G. Maksimov
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Thomas Friedrich
- Department of Bioenergetics, Institute of Chemistry PC 14, Technische Universität Berlin, Berlin, Germany,*Correspondence: Thomas Friedrich,
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12
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Sluchanko NN, Slonimskiy YB, Egorkin NA, Varfolomeeva LA, Faletrov YV, Moysenovich AM, Parshina EY, Friedrich T, Maksimov EG, Boyko KM, Popov VO. Silkworm carotenoprotein as an efficient carotenoid extractor, solubilizer and transporter. Int J Biol Macromol 2022; 223:1381-1393. [PMID: 36395947 DOI: 10.1016/j.ijbiomac.2022.11.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/31/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
Found in many organisms, water-soluble carotenoproteins are prospective antioxidant nanocarriers for biomedical applications. Yet, the toolkit of characterized carotenoproteins is rather limited: such proteins are either too specific binders of only few different carotenoids, or their ability to transfer carotenoids to various acceptor systems is unknown. Here, by focusing on a recently characterized recombinant ~27-kDa Carotenoid-Binding Protein from Bombyx mori (BmCBP) [Slonimskiy et al., International Journal of Biological Macromolecules 214 (2022): 664-671], we analyze its carotenoid-binding repertoire and potential as a carotenoid delivery module. We show that BmCBP forms productive complexes with both hydroxyl- and ketocarotenoids - lutein, zeaxanthin, astaxanthin, canthaxanthin and a smaller antioxidant, aporhodoxanthinone, but not with β-carotene or retinal, which defines its broad ligand specificity toward xanthophylls valuable to human health. Moreover, the His-tagged BmCBP apoform is capable of cost-efficient and scalable enrichment of xanthophylls from various crude methanolic herbal extracts. Upon carotenoid binding, BmCBP remains monomeric and shows a remarkable ability to dynamically shuttle carotenoids to biological membrane models and to unrelated carotenoproteins, which in particular makes from the cyanobacterial Orange Carotenoid Protein a blue-light controlled photoswitch. Furthermore, administration of BmCBP loaded by zeaxanthin stimulates fibroblast growth, which is attractive for cell- and tissue-based assays.
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Affiliation(s)
- Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation.
| | - Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Nikita A Egorkin
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Larisa A Varfolomeeva
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Yaroslav V Faletrov
- Research Institute for Physical Chemical Problems, Belarusian State University, Minsk, Belarus
| | - Anastasia M Moysenovich
- M.V. Lomonosov Moscow State University, Faculty of Biology, 119991 Moscow, Russian Federation
| | - Evgenia Yu Parshina
- M.V. Lomonosov Moscow State University, Faculty of Biology, 119991 Moscow, Russian Federation
| | - Thomas Friedrich
- Technical University of Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - Eugene G Maksimov
- M.V. Lomonosov Moscow State University, Faculty of Biology, 119991 Moscow, Russian Federation
| | - Konstantin M Boyko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Vladimir O Popov
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation; M.V. Lomonosov Moscow State University, Faculty of Biology, 119991 Moscow, Russian Federation
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13
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Structural basis for the carotenoid binding and transport function of a START domain. Structure 2022; 30:1647-1659.e4. [DOI: 10.1016/j.str.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/19/2022] [Accepted: 10/17/2022] [Indexed: 11/10/2022]
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14
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Slonimskiy YB, Zupnik AO, Varfolomeeva LA, Boyko KM, Maksimov EG, Sluchanko NN. A primordial Orange Carotenoid Protein: Structure, photoswitching activity and evolutionary aspects. Int J Biol Macromol 2022; 222:167-180. [PMID: 36165868 DOI: 10.1016/j.ijbiomac.2022.09.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/28/2022]
Abstract
Cyanobacteria are photosynthesizing prokaryotes responsible for the Great Oxygenation Event on Earth ~2.5 Ga years ago. They use a specific photoprotective mechanism based on the 35-kDa photoactive Orange Carotenoid Protein (OCP), a promising target for developing novel optogenetic tools and for biomass engineering. The two-domain OCP presumably stems from domain fusion, yet the primitive thylakoid-less cyanobacteria Gloeobacter encodes a complete OCP. Its photosynthesis regulation lacks the so-called Fluorescence Recovery Protein (FRP), which in Synechocystis inhibits OCP-mediated phycobilisome fluorescence quenching, and Gloeobacter OCP belongs to the recently defined, heterogeneous clade OCPX (GlOCPX), the least characterized compared to OCP2 and especially OCP1 clades. Here, we describe the first crystal structure of OCPX, which explains unique functional adaptations of Gloeobacter OCPX compared to OCP1 from Synechocystis. We show that monomeric GlOCPX exploits a remarkable intramolecular locking mechanism stabilizing its dark-adapted state and exhibits drastically accelerated, less temperature-dependent recovery after photoactivation. While GlOCPX quenches Synechocystis phycobilisomes similar to Synechocystis OCP1, it evades interaction with and regulation by FRP from other species and likely uses alternative mechanisms for fluorescence recovery. This analysis of a primordial OCPX sheds light on its evolution, rationalizing renaming and subdivision of the OCPX clade into subclades - OCP3a, OCP3b, OCP3c.
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Affiliation(s)
- Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Andrei O Zupnik
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Larisa A Varfolomeeva
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Konstantin M Boyko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Eugene G Maksimov
- M.V. Lomonosov Moscow State University, Faculty of Biology, 119991 Moscow, Russian Federation
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation.
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15
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Niziński S, Schlichting I, Colletier JP, Kirilovsky D, Burdzinski G, Sliwa M. Is orange carotenoid protein photoactivation a single-photon process? BIOPHYSICAL REPORTS 2022; 2:100072. [PMID: 36425326 PMCID: PMC9680785 DOI: 10.1016/j.bpr.2022.100072] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/17/2022] [Indexed: 06/16/2023]
Abstract
In all published photoactivation mechanisms of orange carotenoid protein (OCP), absorption of a single photon by the orange dark state starts a cascade of red-shifted OCP ground-state intermediates that subsequently decay within hundreds of milliseconds, resulting in the formation of the final red form OCPR, which is the biologically active form that plays a key role in cyanobacteria photoprotection. A major challenge in deducing the photoactivation mechanism is to create a uniform description explaining both single-pulse excitation experiments, involving single-photon absorption, and continuous light irradiation experiments, where the red-shifted OCP intermediate species may undergo re-excitation. We thus investigated photoactivation of Synechocystis OCP using stationary irradiation light with a biologically relevant photon flux density coupled with nanosecond laser pulse excitation. The kinetics of photoactivation upon continuous and nanosecond pulse irradiation light show that the OCPR formation quantum yield increases with photon flux density; thus, a simple single-photon model cannot describe the data recorded for OCP in vitro. The results strongly suggest a consecutive absorption of two photons involving a red intermediate with ≈100 millisecond lifetime. This intermediate is required in the photoactivation mechanism and formation of the red active form OCPR.
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Affiliation(s)
- Stanisław Niziński
- Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University in Poznań, Poznan, Poland
- Univ. Lille, CNRS, UMR 8516 - LASIRE, Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l’Environnement, Lille, France
| | - Ilme Schlichting
- Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | | | - Diana Kirilovsky
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France
| | - Gotard Burdzinski
- Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University in Poznań, Poznan, Poland
| | - Michel Sliwa
- Univ. Lille, CNRS, UMR 8516 - LASIRE, Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l’Environnement, Lille, France
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16
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Sharawy M, Pigni NB, May ER, Gascón JA. A favorable path to domain separation in the orange carotenoid protein. Protein Sci 2022; 31:850-863. [PMID: 35000233 PMCID: PMC8927859 DOI: 10.1002/pro.4273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/24/2021] [Accepted: 01/03/2022] [Indexed: 11/10/2022]
Abstract
The orange carotenoid protein (OCP) is responsible for nonphotochemical quenching (NPQ) in cyanobacteria, a defense mechanism against potentially damaging effects of excess light conditions. This soluble two-domain protein undergoes profound conformational changes upon photoactivation, involving translocation of the ketocarotenoid inside the cavity followed by domain separation. Domain separation is a critical step in the photocycle of OCP because it exposes the N-terminal domain (NTD) to perform quenching of the phycobilisomes. Many details regarding the mechanism and energetics of OCP domain separation remain unknown. In this work, we apply metadynamics to elucidate the protein rearrangements that lead to the active, domain-separated, form of OCP. We find that translocation of the ketocarotenoid canthaxanthin has a profound effect on the energetic landscape and that domain separation only becomes favorable following translocation. We further explore, characterize, and validate the free energy surface (FES) using equilibrium simulations initiated from different states on the FES. Through pathway optimization methods, we characterize the most probable path to domain separation and reveal the barriers along that pathway. We find that the free energy barriers are relatively small (<5 kcal/mol), but the overall estimated kinetic rate is consistent with experimental measurements (>1 ms). Overall, our results provide detailed information on the requirement for canthaxanthin translocation to precede domain separation and an energetically feasible pathway to dissociation.
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Affiliation(s)
- Mahmoud Sharawy
- Department of Molecular and Cell BiologyUniversity of ConnecticutStorrsConnecticutUSA
| | - Natalia B. Pigni
- Department of ChemistryUniversity of ConnecticutStorrsConnecticutUSA
- Instituto de Ciencia y Tecnología de Alimentos Córdoba (ICYTAC‐CONICET)Ciudad UniversitariaCórdobaArgentina
| | - Eric R. May
- Department of Molecular and Cell BiologyUniversity of ConnecticutStorrsConnecticutUSA
| | - José A. Gascón
- Department of ChemistryUniversity of ConnecticutStorrsConnecticutUSA
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17
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Protasova EA, Antal TK, Zlenko DV, Elanskaya IV, Lukashev EP, Friedrich T, Mironov KS, Sluchanko NN, Ge B, Qin S, Maksimov EG. State of the phycobilisome determines effective absorption cross-section of Photosystem II in Synechocystis sp. PCC 6803. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2021; 1862:148494. [PMID: 34534546 DOI: 10.1016/j.bbabio.2021.148494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/23/2021] [Accepted: 09/07/2021] [Indexed: 11/23/2022]
Abstract
Quenching of excess excitation energy is necessary for the photoprotection of light-harvesting complexes. In cyanobacteria, quenching of phycobilisome (PBS) excitation energy is induced by the Orange Carotenoid Protein (OCP), which becomes photoactivated under high light conditions. A decrease in energy transfer efficiency from the PBSs to the reaction centers decreases photosystem II (PS II) activity. However, quantitative analysis of OCP-induced photoprotection in vivo is complicated by similar effects of both photochemical and non-photochemical quenching on the quantum yield of the PBS fluorescence overlapping with the emission of chlorophyll. In the present study, we have analyzed chlorophyll a fluorescence induction to estimate the effective cross-section of PS II and compared the effects of reversible OCP-dependent quenching of PBS fluorescence with reduction of PBS content upon nitrogen starvation or mutations of key PBS components. This approach allowed us to estimate the dependency of the rate constant of PS II primary electron acceptor reduction on the amount of PBSs in the cell. We found that OCP-dependent quenching triggered by blue light affects approximately half of PBSs coupled to PS II, indicating that under normal conditions, the concentration of OCP is not sufficient for quenching of all PBSs coupled to PS II.
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Affiliation(s)
- Elena A Protasova
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Taras K Antal
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Dmitry V Zlenko
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Irina V Elanskaya
- Department of Genetics, Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Evgeny P Lukashev
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Thomas Friedrich
- Technical University of Berlin, Institute of Chemistry, D-10623 Berlin, Germany
| | - Kirill S Mironov
- Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow 127276, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
| | - Baosheng Ge
- China University of Petroleum (Huadong), College of Chemical Engineering, Qingdao 266580, PR China
| | - Song Qin
- China University of Petroleum (Huadong), College of Chemical Engineering, Qingdao 266580, PR China; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China.
| | - Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia
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18
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UV Excitation of Carotenoid Binding Proteins OCP and HCP: Excited‐State Dynamics and Product Formation. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Slonimskiy YB, Egorkin NA, Friedrich T, Maksimov EG, Sluchanko NN. Microalgal protein AstaP is a potent carotenoid solubilizer and delivery module with a broad carotenoid binding repertoire. FEBS J 2021; 289:999-1022. [PMID: 34582628 DOI: 10.1111/febs.16215] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/09/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022]
Abstract
Carotenoids are lipophilic substances with many biological functions, from coloration to photoprotection. Being potent antioxidants, carotenoids have multiple biomedical applications, including the treatment of neurodegenerative disorders and retina degeneration. Nevertheless, the delivery of carotenoids is substantially limited by their poor solubility in the aqueous phase. Natural water-soluble carotenoproteins can facilitate this task, necessitating studies on their ability to uptake and deliver carotenoids. One such promising carotenoprotein, AstaP (astaxanthin-binding protein), was recently identified in eukaryotic microalgae, but its structure and functional properties remained largely uncharacterized. By using a correctly folded recombinant protein, here we show that AstaP is an efficient carotenoid solubilizer that can stably bind not only astaxanthin but also zeaxanthin, canthaxanthin, and, to a lesser extent, β-carotene, that is, carotenoids especially valuable to human health. AstaP accepts carotenoids provided as acetone solutions or embedded in membranes, forming carotenoid-protein complexes with an apparent stoichiometry of 1:1. We successfully produced AstaP holoproteins in specific carotenoid-producing strains of Escherichia coli, proving it is amenable to cost-efficient biotechnology processes. Regardless of the carotenoid type, AstaP remains monomeric in both apo- and holoform, while its rather minimalistic mass (~ 20 kDa) makes it an especially attractive antioxidant delivery module. In vitro, AstaP transfers different carotenoids to liposomes and to unrelated proteins from cyanobacteria, which can modulate their photoactivity and/or oligomerization. These findings expand the toolkit of the characterized carotenoid binding proteins and outline the perspective of the use of AstaP as a unique monomeric antioxidant nanocarrier with an extensive carotenoid binding repertoire.
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Affiliation(s)
- Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russian Federation
| | - Nikita A Egorkin
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russian Federation
| | - Thomas Friedrich
- Institute of Chemistry PC 14, Technical University of Berlin, Berlin, Germany
| | - Eugene G Maksimov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russian Federation
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russian Federation
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20
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Yaroshevich IA, Maksimov EG, Sluchanko NN, Zlenko DV, Stepanov AV, Slutskaya EA, Slonimskiy YB, Botnarevskii VS, Remeeva A, Gushchin I, Kovalev K, Gordeliy VI, Shelaev IV, Gostev FE, Khakhulin D, Poddubnyy VV, Gostev TS, Cherepanov DA, Polívka T, Kloz M, Friedrich T, Paschenko VZ, Nadtochenko VA, Rubin AB, Kirpichnikov MP. Role of hydrogen bond alternation and charge transfer states in photoactivation of the Orange Carotenoid Protein. Commun Biol 2021; 4:539. [PMID: 33972665 PMCID: PMC8110590 DOI: 10.1038/s42003-021-02022-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 03/16/2021] [Indexed: 11/17/2022] Open
Abstract
Here, we propose a possible photoactivation mechanism of a 35-kDa blue light-triggered photoreceptor, the Orange Carotenoid Protein (OCP), suggesting that the reaction involves the transient formation of a protonated ketocarotenoid (oxocarbenium cation) state. Taking advantage of engineering an OCP variant carrying the Y201W mutation, which shows superior spectroscopic and structural properties, it is shown that the presence of Trp201 augments the impact of one critical H-bond between the ketocarotenoid and the protein. This confers an unprecedented homogeneity of the dark-adapted OCP state and substantially increases the yield of the excited photoproduct S*, which is important for the productive photocycle to proceed. A 1.37 Å crystal structure of OCP Y201W combined with femtosecond time-resolved absorption spectroscopy, kinetic analysis, and deconvolution of the spectral intermediates, as well as extensive quantum chemical calculations incorporating the effect of the local electric field, highlighted the role of charge-transfer states during OCP photoconversion. Yaroshevich et al. present a chemical reaction mechanism of a 35-kDa blue light-triggered photoreceptor, the Orange Carotenoid Protein (OCP). They find that photoactivation critically involves the transient formation of a protonated ketocarotenoid (oxocarbenium cation) state. This study suggests the role of charge-transfer states during OCP photoconversion.
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Affiliation(s)
- Igor A Yaroshevich
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Eugene G Maksimov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia. .,A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia.
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Dmitry V Zlenko
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Alexey V Stepanov
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Ekaterina A Slutskaya
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Yury B Slonimskiy
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Viacheslav S Botnarevskii
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Alina Remeeva
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Ivan Gushchin
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Kirill Kovalev
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institut de Biologie Structurale J.-P. Ebel, Université Grenoble Alpes-CEA-CNRS, Grenoble, France.,Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich, Jülich, Germany.,Institute of Crystallography, RWTH Aachen University, Aachen, Germany
| | - Valentin I Gordeliy
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institut de Biologie Structurale J.-P. Ebel, Université Grenoble Alpes-CEA-CNRS, Grenoble, France.,Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich, Jülich, Germany
| | - Ivan V Shelaev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Fedor E Gostev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | | | | | - Timofey S Gostev
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Dmitry A Cherepanov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia.,A.N. Belozersky Institute of Physical-Chemical Biology, Moscow State University, Moscow, Russia
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Miroslav Kloz
- ELI-Beamlines, Institute of Physics, Praha, Czech Republic
| | - Thomas Friedrich
- Technische Universität Berlin, Institute of Chemistry PC14, Berlin, Germany
| | | | - Victor A Nadtochenko
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Andrew B Rubin
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Mikhail P Kirpichnikov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russia.,M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
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21
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Ralston CY, Kerfeld CA. Integrated Structural Studies for Elucidating Carotenoid-Protein Interactions. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1371:1-10. [PMID: 33963527 DOI: 10.1007/5584_2020_615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Carotenoids are ancient pigment molecules that, when associated with proteins, have a tremendous range of functional properties. Unlike most protein prosthetic groups, there are no recognizable primary structure motifs that predict carotenoid binding, hence the structural details of their amino acid interactions in proteins must be worked out empirically. Here we describe our recent efforts to combine complementary biophysical methods to elucidate the precise details of protein-carotenoid interactions in the Orange Carotenoid Protein and its evolutionary antecedents, the Helical Carotenoid Proteins (HCPs), CTD-like carotenoid proteins (CCPs).
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Affiliation(s)
- Corie Y Ralston
- Molecular Biophysics and Integrated Bioimaging Division and the Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Cheryl A Kerfeld
- Environmental Genomics and Systems Biology and Molecular Biophysics and Integrated Bioimaging Divisions, Lawrence Berkeley National Laboratory, Berkeley, CA, USA. .,MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI, USA. .,Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA.
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22
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Spectral Features of Canthaxanthin in HCP2. A QM/MM Approach. Molecules 2021; 26:molecules26092441. [PMID: 33922133 PMCID: PMC8122715 DOI: 10.3390/molecules26092441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/16/2021] [Accepted: 04/18/2021] [Indexed: 11/17/2022] Open
Abstract
The increased interest in sequencing cyanobacterial genomes has allowed the identification of new homologs to both the N-terminal domain (NTD) and C-terminal domain (CTD) of the Orange Carotenoid Protein (OCP). The N-terminal domain homologs are known as Helical Carotenoid Proteins (HCPs). Although some of these paralogs have been reported to act as singlet oxygen quenchers, their distinct functional roles remain unclear. One of these paralogs (HCP2) exclusively binds canthaxanthin (CAN) and its crystal structure has been recently characterized. Its absorption spectrum is significantly red-shifted, in comparison to the protein in solution, due to a dimerization where the two carotenoids are closely placed, favoring an electronic coupling interaction. Both the crystal and solution spectra are red-shifted by more than 50 nm when compared to canthaxanthin in solution. Using molecular dynamics (MD) and quantum mechanical/molecular mechanical (QM/MM) studies of HCP2, we aim to simulate these shifts as well as obtain insight into the environmental and coupling effects of carotenoid-protein interactions.
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23
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24
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Mishra KB, Vítek P, Mishra A, Hájek J, Barták M. Chlorophyll a fluorescence and Raman spectroscopy can monitor activation/deactivation of photosynthesis and carotenoids in Antarctic lichens. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 239:118458. [PMID: 32480272 DOI: 10.1016/j.saa.2020.118458] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/21/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Lichens survive harsh weather of Antarctica as well as of other hostile environments worldwide. Therefore, this investigation is important to understand the evolution of life on Earth in relation to their stress tolerance strategy. We have used chlorophyll a fluorescence (ChlF) and Raman spectroscopy, respectively, to monitor the activation/deactivation of photosynthesis and carotenoids in three diverse Antarctic lichens, Dermatocarpon polyphyllizum (DP), Umbilicaria antarctica (UA), and Leptogium puberulum (LP). These lichens, post 4 h or 24 h of hydration, showed differences in their ChlF transients and values of major ChlF parameters, e.g., in the maximum quantum efficiency of PSII photochemistry (Fv/Fm), and yields of fluorescence and heat dissipation (Φf,d), of effective quantum efficiency of PSII photochemistry (ΦPSII) and of non-photochemical quenching (Φnpq), which may be due to quantitative and/or qualitative differences in the composition of their photobionts. For understanding the kinetics of hydration-induced activation of photosynthesis, we screened ΦPSII of these lichens and reported its non-linear stimulation on a minute time scale; half of the activation time (t1/2) was fastest ~4.05 ± 0.29 min for DP, which was followed by 5.46 ± 0.18 min for UA, and 13.95 ± 1.24 min for LP. Upon drying of fully activated lichen thallus, there was a slow decay, in hours, of relative water content (RWC) as well as of Fv/Fm. Raman spectral signatures were different for lichens having algal (in DP and UA) and cyanobacteria (in LP) photobionts, and there was a significant shift in ν1(C=C) Raman band of carotenoids post 24 h hydration as compared to their value at a dry state or post 4 h of hydration; this shift was decreased, when drying, in DP and LP but not in UA. We conclude that hydration nonlinearly activated photosynthetic apparatus/reactions of these lichens in minute time range but there was a de-novo synthesis of chlorophylls as well as of carotenoids post 24 h. Their dehydration-induced deactivation, however, was comparatively slow, in hours range, and there seemed a degradation of synthesized chlorophylls and carotenoids post dryness. We conclude that in extremophilic lichens, their photosynthetic partners, in particular, possess a complex survival and photoprotective strategy to be successful in the extreme terrestrial environments in Antarctica.
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Affiliation(s)
- Kumud Bandhu Mishra
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; Global Change Research Institute, Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic.
| | - Petr Vítek
- Global Change Research Institute, Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic
| | - Anamika Mishra
- Global Change Research Institute, Czech Academy of Sciences, Bělidla 986/4a, 603 00 Brno, Czech Republic
| | - Josef Hájek
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Miloš Barták
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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25
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Maksimov EG, Zamaraev AV, Parshina EY, Slonimskiy YB, Slastnikova TA, Abdrakhmanov AA, Babaev PA, Efimova SS, Ostroumova OS, Stepanov AV, Slutskaya EA, Ryabova AV, Friedrich T, Sluchanko NN. Soluble Cyanobacterial Carotenoprotein as a Robust Antioxidant Nanocarrier and Delivery Module. Antioxidants (Basel) 2020; 9:antiox9090869. [PMID: 32942578 PMCID: PMC7555398 DOI: 10.3390/antiox9090869] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 01/04/2023] Open
Abstract
To counteract oxidative stress, antioxidants including carotenoids are highly promising, yet their exploitation is drastically limited by the poor bioavailability and fast photodestruction, whereas current delivery systems are far from being efficient. Here we demonstrate that the recently discovered nanometer-sized water-soluble carotenoprotein from Anabaena sp. PCC 7120 (termed AnaCTDH) transiently interacts with liposomes to efficiently extract carotenoids via carotenoid-mediated homodimerization, yielding violet–purple protein samples. We characterize the spectroscopic properties of the obtained pigment–protein complexes and the thermodynamics of liposome–protein carotenoid transfer and demonstrate the delivery of carotenoid echinenone from AnaCTDH into liposomes with an efficiency of up to 70 ± 3%. Most importantly, we show efficient carotenoid delivery to membranes of mammalian cells, which provides protection from reactive oxygen species (ROS). Incubation of neuroblastoma cell line Tet21N in the presence of 1 μM AnaCTDH binding echinenone decreased antimycin A ROS production by 25% (p < 0.05). The described carotenoprotein may be considered as part of modular systems for the targeted antioxidant delivery.
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Affiliation(s)
- Eugene G. Maksimov
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.Y.P.); (P.A.B.); (N.N.S.)
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia;
- Correspondence: ; Tel.: +7-926-735-04-37
| | - Alexey V. Zamaraev
- Faculty of Basic Medicine, MV Lomonosov Moscow State University, 117192 Moscow, Russia; (A.V.Z.); (A.A.A.)
- Center for Strategic Planning and Management of Medical and Biological Health Risks, 119121 Moscow, Russia
| | - Evgenia Yu. Parshina
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.Y.P.); (P.A.B.); (N.N.S.)
| | - Yury B. Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia;
| | | | - Alibek A. Abdrakhmanov
- Faculty of Basic Medicine, MV Lomonosov Moscow State University, 117192 Moscow, Russia; (A.V.Z.); (A.A.A.)
| | - Pavel A. Babaev
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.Y.P.); (P.A.B.); (N.N.S.)
| | - Svetlana S. Efimova
- Institute of Cytology of the Russian Academy of Sciences, 194064 St. Petersburg, Russia; (S.S.E.); (O.S.O.)
| | - Olga S. Ostroumova
- Institute of Cytology of the Russian Academy of Sciences, 194064 St. Petersburg, Russia; (S.S.E.); (O.S.O.)
| | - Alexey V. Stepanov
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (A.V.S.); (E.A.S.)
| | - Ekaterina A. Slutskaya
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia; (A.V.S.); (E.A.S.)
| | - Anastasia V. Ryabova
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Thomas Friedrich
- Institute of Chemistry PC 14, Department of Bioenergetics, Technische Universität Berlin, 10623 Berlin, Germany;
| | - Nikolai N. Sluchanko
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.Y.P.); (P.A.B.); (N.N.S.)
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia;
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26
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Maksimov EG, Protasova EA, Tsoraev GV, Yaroshevich IA, Maydykovskiy AI, Shirshin EA, Gostev TS, Jelzow A, Moldenhauer M, Slonimskiy YB, Sluchanko NN, Friedrich T. Probing of carotenoid-tryptophan hydrogen bonding dynamics in the single-tryptophan photoactive Orange Carotenoid Protein. Sci Rep 2020; 10:11729. [PMID: 32678150 PMCID: PMC7366913 DOI: 10.1038/s41598-020-68463-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 06/25/2020] [Indexed: 01/07/2023] Open
Abstract
The photoactive Orange Carotenoid Protein (OCP) plays a key role in cyanobacterial photoprotection. In OCP, a single non-covalently bound keto-carotenoid molecule acts as a light intensity sensor, while the protein is responsible for forming molecular contacts with the light-harvesting antenna, the fluorescence of which is quenched by OCP. Activation of this physiological interaction requires signal transduction from the photoexcited carotenoid to the protein matrix. Recent works revealed an asynchrony between conformational transitions of the carotenoid and the protein. Intrinsic tryptophan (Trp) fluorescence has provided valuable information about the protein part of OCP during its photocycle. However, wild-type OCP contains five Trp residues, which makes extraction of site-specific information impossible. In this work, we overcame this problem by characterizing the photocycle of a fully photoactive OCP variant (OCP-3FH) with only the most critical tryptophan residue (Trp-288) in place. Trp-288 is of special interest because it forms a hydrogen bond to the carotenoid's keto-oxygen to keep OCP in its dark-adapted state. Using femtosecond pump-probe fluorescence spectroscopy we analyzed the photocycle of OCP-3FH and determined the formation rate of the very first intermediate suggesting that generation of the recently discovered S* state of the carotenoid in OCP precedes the breakage of the hydrogen bonds. Therefore, following Trp fluorescence of the unique photoactive OCP-3FH variant, we identified the rate of the H-bond breakage and provided novel insights into early events accompanying photoactivation of wild-type OCP.
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Affiliation(s)
- Eugene G. Maksimov
- 0000 0001 2342 9668grid.14476.30Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia ,0000 0004 0468 2555grid.425156.1A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Elena A. Protasova
- 0000 0001 2342 9668grid.14476.30Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Georgy V. Tsoraev
- 0000 0001 2342 9668grid.14476.30Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Igor A. Yaroshevich
- 0000 0001 2342 9668grid.14476.30Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Anton I. Maydykovskiy
- 0000 0001 2342 9668grid.14476.30Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Evgeny A. Shirshin
- 0000 0001 2342 9668grid.14476.30Department of Quantum Electronics, Faculty of Physics, M.V. Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Timofey S. Gostev
- 0000 0001 2342 9668grid.14476.30Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
| | | | - Marcus Moldenhauer
- 0000 0001 2292 8254grid.6734.6Technical University of Berlin, Institute of Chemistry PC 14, Straße des des 17. Juni 135, 10623 Berlin, Germany
| | - Yury B. Slonimskiy
- 0000 0004 0468 2555grid.425156.1A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Nikolai N. Sluchanko
- 0000 0001 2342 9668grid.14476.30Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, 119991 Moscow, Russia ,0000 0004 0468 2555grid.425156.1A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Thomas Friedrich
- 0000 0001 2292 8254grid.6734.6Technical University of Berlin, Institute of Chemistry PC 14, Straße des des 17. Juni 135, 10623 Berlin, Germany
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27
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Lou W, Niedzwiedzki DM, Jiang RJ, Blankenship RE, Liu H. Binding of red form of Orange Carotenoid Protein (OCP) to phycobilisome is not sufficient for quenching. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2020; 1861:148155. [PMID: 31935359 DOI: 10.1016/j.bbabio.2020.148155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 12/06/2019] [Accepted: 01/08/2020] [Indexed: 10/25/2022]
Abstract
The Orange Carotenoid Protein (OCP) is responsible for photoprotection in many cyanobacteria. Absorption of blue light drives the conversion of the orange, inactive form (OCPO) to the red, active form (OCPR). Concomitantly, the N-terminal domain (NTD) and the C-terminal domain (CTD) of OCP separate, which ultimately leads to the formation of a quenched OCPR-PBS complex. The details of the photoactivation of OCP have been intensely researched. Binding site(s) of OCPR on the PBS core have also been proposed. However, the post-binding events of the OCPR-PBS complex remain unclear. Here, we demonstrate that PBS-bound OCPR is not sufficient as a PBS excitation energy quencher. Using site-directed mutagenesis, we generated a suite of single point mutations at OCP Leucine 51 (L51) of Synechocystis 6803. Steady-state and time-resolved fluorescence analyses demonstrated that all mutant proteins are unable to quench the PBS fluorescence, owing to either failed OCP binding to PBS, or, if bound, an OCP-PBS quenching state failed to form. The SDS-PAGE and Western blot analysis support that the L51A (Alanine) mutant binds to the PBS and therefore belongs to the second category. We hypothesize that upon binding to PBS, OCPR likely reorganizes and adopts a new conformational state (OCP3rd) different than either OCPO or OCPR to allow energy quenching, depending on the cross-talk between OCPR and its PBS core-binding counterpart.
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Affiliation(s)
- Wenjing Lou
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Dariusz M Niedzwiedzki
- Center for Solar Energy and Energy Storage, Washington University in St. Louis, St. Louis, MO 63130, USA; Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Ruidong J Jiang
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Robert E Blankenship
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA; Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Haijun Liu
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA; Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, USA.
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28
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Slonimskiy YB, Maksimov EG, Lukashev EP, Moldenhauer M, Friedrich T, Sluchanko NN. Engineering the photoactive orange carotenoid protein with redox-controllable structural dynamics and photoprotective function. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2020; 1861:148174. [PMID: 32059843 DOI: 10.1016/j.bbabio.2020.148174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 02/02/2020] [Accepted: 02/10/2020] [Indexed: 01/01/2023]
Abstract
Photosynthesis requires various photoprotective mechanisms for survival of organisms in high light. In cyanobacteria exposed to high light, the Orange Carotenoid Protein (OCP) is reversibly photoswitched from the orange (OCPO) to the red (OCPR) form, the latter binds to the antenna (phycobilisomes, PBs) and quenches its overexcitation. OCPR accumulation implicates restructuring of a compact dark-adapted OCPO state including detachment of the N-terminal extension (NTE) and separation of protein domains, which is reversed by interaction with the Fluorescence Recovery Protein (FRP). OCP phototransformation supposedly occurs via an intermediate characterized by an OCPR-like absorption spectrum and an OCPO-like protein structure, but the hierarchy of steps remains debatable. Here, we devise and analyze an OCP variant with the NTE trapped on the C-terminal domain (CTD) via an engineered disulfide bridge (OCPCC). NTE trapping preserves OCP photocycling within the compact protein structure but precludes functional interaction with PBs and especially FRP, which is completely restored upon reduction of the disulfide bridge. Non-interacting with the dark-adapted oxidized OCPCC, FRP binds reduced OCPCC nearly as efficiently as OCPO devoid of the NTE, suggesting that the low-affinity FRP binding to OCPO is realized via NTE displacement. The low efficiency of excitation energy transfer in complexes between PBs and oxidized OCPCC indicates that OCPCC binds to PBs in an orientation suboptimal for quenching PBs fluorescence. Our approach supports the presence of the OCPR-like intermediate in the OCP photocycle and shows effective uncoupling of spectral changes from functional OCP photoactivation, enabling redox control of its structural dynamics and function.
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Affiliation(s)
- Yury B Slonimskiy
- Protein-Protein Interactions Unit, A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation; Department of Biochemistry, Faculty of Biology, M.V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Eugene G Maksimov
- Protein-Protein Interactions Unit, A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation; Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Evgeny P Lukashev
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Marcus Moldenhauer
- Technische Universität Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - Thomas Friedrich
- Technische Universität Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - Nikolai N Sluchanko
- Protein-Protein Interactions Unit, A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation; Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation.
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29
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Kuznetsova V, Dominguez-Martin MA, Bao H, Gupta S, Sutter M, Kloz M, Rebarz M, Přeček M, Chen Y, Petzold CJ, Ralston CY, Kerfeld CA, Polívka T. Comparative ultrafast spectroscopy and structural analysis of OCP1 and OCP2 from Tolypothrix. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2020; 1861:148120. [PMID: 31734194 PMCID: PMC6943196 DOI: 10.1016/j.bbabio.2019.148120] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 10/09/2019] [Accepted: 11/04/2019] [Indexed: 01/12/2023]
Abstract
The orange carotenoid protein (OCP) is a structurally and functionally modular photoactive protein involved in cyanobacterial photoprotection. Recently, based on bioinformatic analysis and phylogenetic relationships, new families of OCP have been described, OCP2 and OCPx. The first characterization of the OCP2 showed both faster photoconversion and back-conversion, and lower fluorescence quenching of phycobilisomes relative to the well-characterized OCP1. Moreover, OCP2 is not regulated by the fluorescence recovery protein (FRP). In this work, we present a comprehensive study combining ultrafast spectroscopy and structural analysis to compare the photoactivation mechanisms of OCP1 and OCP2 from Tolypothrix PCC 7601. We show that despite significant differences in their functional characteristics, the spectroscopic properties of OCP1 and OCP2 are comparable. This indicates that the OCP functionality is not directly related to the spectroscopic properties of the bound carotenoid. In addition, the structural analysis by X-ray footprinting reveals that, overall, OCP1 and OCP2 have grossly the same photoactivation mechanism. However, the OCP2 is less reactive to radiolytic labeling, suggesting that the protein is less flexible than OCP1. This observation could explain fast photoconversion of OCP2.
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Affiliation(s)
- Valentyna Kuznetsova
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | | | - Han Bao
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Sayan Gupta
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Markus Sutter
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA; Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Miroslav Kloz
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
| | - Mateusz Rebarz
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
| | - Martin Přeček
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
| | - Yan Chen
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Christopher J Petzold
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Corie Y Ralston
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Cheryl A Kerfeld
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA; Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Tomáš Polívka
- Institute of Physics, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
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Bondanza M, Cupellini L, Lipparini F, Mennucci B. The Multiple Roles of the Protein in the Photoactivation of Orange Carotenoid Protein. Chem 2020. [DOI: 10.1016/j.chempr.2019.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Kirilovsky D. Modulating Energy Transfer from Phycobilisomes to Photosystems: State Transitions and OCP-Related Non-Photochemical Quenching. PHOTOSYNTHESIS IN ALGAE: BIOCHEMICAL AND PHYSIOLOGICAL MECHANISMS 2020. [DOI: 10.1007/978-3-030-33397-3_14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Muzzopappa F, Kirilovsky D. Changing Color for Photoprotection: The Orange Carotenoid Protein. TRENDS IN PLANT SCIENCE 2020; 25:92-104. [PMID: 31679992 DOI: 10.1016/j.tplants.2019.09.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 05/09/2023]
Abstract
Under high irradiance, light becomes dangerous for photosynthetic organisms and they must protect themselves. Cyanobacteria have developed a simple mechanism, involving a photoactive soluble carotenoid protein, the orange carotenoid protein (OCP), which increases thermal dissipation of excess energy by interacting with the cyanobacterial antenna, the phycobilisome. Here, we summarize our knowledge of the OCP-related photoprotective mechanism, including the remarkable progress that has been achieved in recent years on OCP photoactivation and interaction with phycobilisomes, as well as with the fluorescence recovery protein, which is necessary to end photoprotection. A recently discovered unique mechanism of carotenoid transfer between soluble proteins related to OCP is also described.
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Affiliation(s)
- Fernando Muzzopappa
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France
| | - Diana Kirilovsky
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, 91198 Gif sur Yvette, France.
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Wei T, Balevičius V, Polívka T, Ruban AV, Duffy CDP. How carotenoid distortions may determine optical properties: lessons from the Orange Carotenoid Protein. Phys Chem Chem Phys 2019; 21:23187-23197. [PMID: 31612872 DOI: 10.1039/c9cp03574e] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carotenoids in photosynthetic proteins carry out the dual function of harvesting light and defending against photo-damage by quenching excess energy. The latter involves the low-lying, dark, excited state labelled S1. Here "dark" means optically-forbidden, a property that is often attributed to molecular symmetry, which leads to speculation that its optical properties may be strongly-perturbed by structural distortions. This has been both explicitly and implicitly proposed as an important feature of photo-protective energy quenching. Here we present a theoretical analysis of the relationship between structural distortions and S1 optical properties. We outline how S1 is dark not because of overall geometric symmetry but because of a topological symmetry related to bond length alternation in the conjugated backbone. Taking the carotenoid echinenone as an example and using a combination of molecular dynamics, quantum chemistry, and the theory of spectral lineshapes, we show that distortions that break this symmetry are extremely stiff. They are therefore absent in solution and only marginally present in even a very highly-distorted protein binding pocket such as in the Orange Carotenoid Protein (OCP). S1 remains resolutely optically-forbidden despite any breaking of bulk molecular symmetry by the protein environment. However, rotations of partially conjugated end-rings can result in fine tuning of the S1 transition density which may exert some influence on interactions with neighbouring chromophores.
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Affiliation(s)
- Tiejun Wei
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK.
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34
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Muzzopappa F, Wilson A, Kirilovsky D. Interdomain interactions reveal the molecular evolution of the orange carotenoid protein. NATURE PLANTS 2019; 5:1076-1086. [PMID: 31527845 DOI: 10.1038/s41477-019-0514-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 08/05/2019] [Indexed: 06/10/2023]
Abstract
The photoactive orange carotenoid protein (OCP) is a blue-light intensity sensor involved in cyanobacterial photoprotection. Three OCP families co-exist (OCPX, OCP1 and OCP2), having originated from the fusion of ancestral domain genes. Here, we report the characterization of an OCPX and the evolutionary characterization of OCP paralogues focusing on the role of the linker connecting the domains. The addition of the linker with specific amino acids enabled the photocycle of the OCP ancestor. OCPX is the paralogue closest to this ancestor. A second diversification gave rise to OCP1 and OCP2. OCPX and OCP2 present fast deactivation and weak antenna interaction. In OCP1, OCP deactivation became slower and interaction with the antenna became stronger, requiring a further protein to detach OCP from the antenna and accelerate its deactivation. OCP2 lost the tendency to dimerize, unlike OCPX and OCP1, and the role of its linker is slightly different, giving less controlled photoactivation.
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Affiliation(s)
- Fernando Muzzopappa
- Institute for Integrative Biology of the Cell, CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif sur Yvette, France
| | - Adjélé Wilson
- Institute for Integrative Biology of the Cell, CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif sur Yvette, France
| | - Diana Kirilovsky
- Institute for Integrative Biology of the Cell, CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif sur Yvette, France.
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35
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Golub M, Moldenhauer M, Schmitt FJ, Feoktystov A, Mändar H, Maksimov E, Friedrich T, Pieper J. Solution Structure and Conformational Flexibility in the Active State of the Orange Carotenoid Protein: Part I. Small-Angle Scattering. J Phys Chem B 2019; 123:9525-9535. [DOI: 10.1021/acs.jpcb.9b05071] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maksym Golub
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Marcus Moldenhauer
- Technische Universität Berlin, Institute of Chemistry, Physical Chemistry, 10623 Berlin, Germany
| | - Franz-Josef Schmitt
- Technische Universität Berlin, Institute of Chemistry, Physical Chemistry, 10623 Berlin, Germany
| | - Artem Feoktystov
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstraße 1, 85748 Garching, Germany
| | - Hugo Mändar
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
| | - Eugene Maksimov
- M. V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Thomas Friedrich
- Technische Universität Berlin, Institute of Chemistry, Physical Chemistry, 10623 Berlin, Germany
| | - Jörg Pieper
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
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36
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Maksimov EG, Li WJ, Protasova EA, Friedrich T, Ge B, Qin S, Sluchanko NN. Hybrid coupling of R-phycoerythrin and the orange carotenoid protein supports the FRET-based mechanism of cyanobacterial photoprotection. Biochem Biophys Res Commun 2019; 516:699-704. [DOI: 10.1016/j.bbrc.2019.06.098] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 06/18/2019] [Indexed: 12/31/2022]
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A genetically encoded fluorescent temperature sensor derived from the photoactive Orange Carotenoid Protein. Sci Rep 2019; 9:8937. [PMID: 31222180 PMCID: PMC6586625 DOI: 10.1038/s41598-019-45421-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/04/2019] [Indexed: 11/09/2022] Open
Abstract
The heterogeneity of metabolic reactions leads to a non-uniform distribution of temperature in different parts of the living cell. The demand to study normal functioning and pathological abnormalities of cellular processes requires the development of new visualization methods. Previously, we have shown that the 35-kDa photoswitchable Orange Carotenoid Protein (OCP) has a strong temperature dependency of photoconversion rates, and its tertiary structure undergoes significant structural rearrangements upon photoactivation, which makes this protein a nano-sized temperature sensor. However, the determination of OCP conversion rates requires measurements of carotenoid absorption, which is not suitable for microscopy. In order to solve this problem, we fused green and red fluorescent proteins (TagGFP and TagRFP) to the structure of OCP, producing photoactive chimeras. In such chimeras, electronic excitation of the fluorescent protein is effectively quenched by the carotenoid in OCP. Photoactivation of OCP-based chimeras triggers rearrangements of complex geometry, permitting measurements of the conversion rates by monitoring changes of fluorescence intensity. This approach allowed us to determine the local temperature of the microenvironment. Future directions to improve the OCP-based sensor are discussed.
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Gupta S, Sutter M, Remesh SG, Dominguez-Martin MA, Bao H, Feng XA, Chan LJG, Petzold CJ, Kerfeld CA, Ralston CY. X-ray radiolytic labeling reveals the molecular basis of orange carotenoid protein photoprotection and its interactions with fluorescence recovery protein. J Biol Chem 2019; 294:8848-8860. [PMID: 30979724 DOI: 10.1074/jbc.ra119.007592] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/05/2019] [Indexed: 11/06/2022] Open
Abstract
In cyanobacterial photoprotection, the orange carotenoid protein (OCP) is photoactivated under excess light conditions and binds to the light-harvesting antenna, triggering the dissipation of captured light energy. In low light, the OCP relaxes to the native state, a process that is accelerated in the presence of fluorescence recovery protein (FRP). Despite the importance of the OCP in photoprotection, the precise mechanism of photoactivation by this protein is not well-understood. Using time-resolved X-ray-mediated in situ hydroxyl radical labeling, we probed real-time solvent accessibility (SA) changes at key OCP residues during photoactivation and relaxation. We observed a biphasic photoactivation process in which carotenoid migration preceded domain dissociation. We also observed a multiphasic relaxation process, with collapsed domain association preceding the final conformational rearrangement of the carotenoid. Using steady-state hydroxyl radical labeling, we identified sites of interaction between the FRP and OCP. In combination, the findings in this study provide molecular-level insights into the factors driving structural changes during OCP-mediated photoprotection in cyanobacteria, and furnish a basis for understanding the physiological relevance of the FRP-mediated relaxation process.
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Affiliation(s)
- Sayan Gupta
- From the Molecular Biophysics and Integrated Bioimaging Division
| | - Markus Sutter
- From the Molecular Biophysics and Integrated Bioimaging Division.,the MSU-DOE Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824.,the Environmental Genomics and Systems Biology Division, and
| | - Soumya G Remesh
- From the Molecular Biophysics and Integrated Bioimaging Division
| | - Maria Agustina Dominguez-Martin
- the MSU-DOE Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
| | - Han Bao
- the MSU-DOE Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824
| | - Xinyu A Feng
- From the Molecular Biophysics and Integrated Bioimaging Division
| | - Leanne-Jade G Chan
- the Biological Systems and Engineering Divisions, Lawrence Berkeley National Laboratory, Berkeley, California 94720 and
| | - Christopher J Petzold
- the Biological Systems and Engineering Divisions, Lawrence Berkeley National Laboratory, Berkeley, California 94720 and
| | - Cheryl A Kerfeld
- From the Molecular Biophysics and Integrated Bioimaging Division, .,the MSU-DOE Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824.,the Environmental Genomics and Systems Biology Division, and
| | - Corie Y Ralston
- From the Molecular Biophysics and Integrated Bioimaging Division,
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39
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Slonimskiy YB, Muzzopappa F, Maksimov EG, Wilson A, Friedrich T, Kirilovsky D, Sluchanko NN. Light‐controlled carotenoid transfer between water‐soluble proteins related to cyanobacterial photoprotection. FEBS J 2019; 286:1908-1924. [DOI: 10.1111/febs.14803] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 02/07/2019] [Accepted: 03/05/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Yury B. Slonimskiy
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
- Department of Biochemistry Faculty of Biology M.V. Lomonosov Moscow State University Russia
| | - Fernando Muzzopappa
- Institute for Integrative Biology of the Cell (I2BC) CEA CNRS Université Paris‐Sud Université Paris‐Saclay Gif sur Yvette France
| | - Eugene G. Maksimov
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
- Department of Biophysics Faculty of Biology M.V. Lomonosov Moscow State University Russia
| | - Adjélé Wilson
- Institute for Integrative Biology of the Cell (I2BC) CEA CNRS Université Paris‐Sud Université Paris‐Saclay Gif sur Yvette France
| | - Thomas Friedrich
- Institute of Chemistry PC 14 Technical University of Berlin Germany
| | - Diana Kirilovsky
- Institute for Integrative Biology of the Cell (I2BC) CEA CNRS Université Paris‐Sud Université Paris‐Saclay Gif sur Yvette France
| | - Nikolai N. Sluchanko
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
- Department of Biophysics Faculty of Biology M.V. Lomonosov Moscow State University Russia
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40
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Radioprotective role of cyanobacterial phycobilisomes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1860:121-128. [PMID: 30465750 DOI: 10.1016/j.bbabio.2018.11.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 11/07/2018] [Accepted: 11/18/2018] [Indexed: 11/20/2022]
Abstract
Cyanobacteria are thought to be responsible for pioneering dioxygen production and the so-called "Great Oxygenation Event" that determined the formation of the ozone layer and the ionosphere restricting ionizing radiation levels reaching our planet, which increased biological diversity but also abolished the necessity of radioprotection. We speculated that ancient protection mechanisms could still be present in cyanobacteria and studied the effect of ionizing radiation and space flight during the Foton-M4 mission on Synechocystis sp. PCC6803. Spectral and functional characteristics of photosynthetic membranes revealed numerous similarities of the effects of α-particles and space flight, which both interrupted excitation energy transfer from phycobilisomes to the photosystems and significantly reduced the concentration of phycobiliproteins. Although photosynthetic activity was severely suppressed, the effect was reversible, and the cells could rapidly recover from the stress. We suggest that the actual existence and the uncoupling of phycobilisomes may play a specific role not only in photo-, but also in radioprotection, which could be crucial for the early evolution of Life on Earth.
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41
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OCP-FRP protein complex topologies suggest a mechanism for controlling high light tolerance in cyanobacteria. Nat Commun 2018; 9:3869. [PMID: 30250028 PMCID: PMC6155142 DOI: 10.1038/s41467-018-06195-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/17/2018] [Indexed: 11/08/2022] Open
Abstract
In cyanobacteria, high light photoactivates the orange carotenoid protein (OCP) that binds to antennae complexes, dissipating energy and preventing the destruction of the photosynthetic apparatus. At low light, OCP is efficiently deactivated by a poorly understood action of the dimeric fluorescence recovery protein (FRP). Here, we engineer FRP variants with defined oligomeric states and scrutinize their functional interaction with OCP. Complemented by disulfide trapping and chemical crosslinking, structural analysis in solution reveals the topology of metastable complexes of OCP and the FRP scaffold with different stoichiometries. Unable to tightly bind monomeric FRP, photoactivated OCP recruits dimeric FRP, which subsequently monomerizes giving 1:1 complexes. This could be facilitated by a transient OCP–2FRP–OCP complex formed via the two FRP head domains, significantly improving FRP efficiency at elevated OCP levels. By identifying key molecular interfaces, our findings may inspire the design of optically triggered systems transducing light signals into protein–protein interactions. Cyanobacterial photoprotection is controlled by OCP and FRP proteins, but their dynamic interplay is not fully understood. Here, the authors combine protein engineering, disulfide trapping and structural analyses to provide mechanistic insights into the transient OCP-FRP interaction.
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42
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Sonani RR, Gardiner A, Rastogi RP, Cogdell R, Robert B, Madamwar D. Site, trigger, quenching mechanism and recovery of non-photochemical quenching in cyanobacteria: recent updates. PHOTOSYNTHESIS RESEARCH 2018; 137:171-180. [PMID: 29574660 DOI: 10.1007/s11120-018-0498-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
Cyanobacteria exhibit a novel form of non-photochemical quenching (NPQ) at the level of the phycobilisome. NPQ is a process that protects photosystem II (PSII) from possible highlight-induced photo-damage. Although significant advancement has been made in understanding the NPQ, there are still some missing details. This critical review focuses on how the orange carotenoid protein (OCP) and its partner fluorescence recovery protein (FRP) control the extent of quenching. What is and what is not known about the NPQ is discussed under four subtitles; where does exactly the site of quenching lie? (site), how is the quenching being triggered? (trigger), molecular mechanism of quenching (quenching) and recovery from quenching. Finally, a recent working model of NPQ, consistent with recent findings, is been described.
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Affiliation(s)
- Ravi R Sonani
- Post-Graduate Department of Biosciences, Sardar Patel University, Bakrol, Anand, Gujarat, 388315, India.
- Institute of Molecular, Cell and System Biology, University of Glasgow, Glasgow, G12 8TA, UK.
- CEA, Institute of Biology and Technology of Saclay, CNRS, 91191, Gif/Yvette, France.
- School of Sciences, P. P. Savani University, Dhamdod, Kosamba, Surat, Gujarat, 394125, India.
| | - Alastair Gardiner
- Institute of Molecular, Cell and System Biology, University of Glasgow, Glasgow, G12 8TA, UK
| | - Rajesh P Rastogi
- Post-Graduate Department of Biosciences, Sardar Patel University, Bakrol, Anand, Gujarat, 388315, India
| | - Richard Cogdell
- Institute of Molecular, Cell and System Biology, University of Glasgow, Glasgow, G12 8TA, UK.
| | - Bruno Robert
- CEA, Institute of Biology and Technology of Saclay, CNRS, 91191, Gif/Yvette, France.
| | - Datta Madamwar
- Post-Graduate Department of Biosciences, Sardar Patel University, Bakrol, Anand, Gujarat, 388315, India.
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Kreslavski VD, Los DA, Schmitt FJ, Zharmukhamedov SK, Kuznetsov VV, Allakhverdiev SI. The impact of the phytochromes on photosynthetic processes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1859:400-408. [DOI: 10.1016/j.bbabio.2018.03.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 03/04/2018] [Accepted: 03/09/2018] [Indexed: 10/17/2022]
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Slonimskiy YB, Maksimov EG, Lukashev EP, Moldenhauer M, Jeffries CM, Svergun DI, Friedrich T, Sluchanko NN. Functional interaction of low-homology FRPs from different cyanobacteria with Synechocystis OCP. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018. [DOI: 10.1016/j.bbabio.2018.03.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Sluchanko NN, Slonimskiy YB, Maksimov EG. Features of Protein-Protein Interactions in the Cyanobacterial Photoprotection Mechanism. BIOCHEMISTRY (MOSCOW) 2018. [PMID: 29523061 DOI: 10.1134/s000629791713003x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Photoprotective mechanisms of cyanobacteria are characterized by several features associated with the structure of their water-soluble antenna complexes - the phycobilisomes (PBs). During energy transfer from PBs to chlorophyll of photosystem reaction centers, the "energy funnel" principle is realized, which regulates energy flux due to the specialized interaction of the PBs core with a quenching molecule capable of effectively dissipating electron excitation energy into heat. The role of the quencher is performed by ketocarotenoid within the photoactive orange carotenoid protein (OCP), which is also a sensor for light flux. At a high level of insolation, OCP is reversibly photoactivated, and this is accompanied by a significant change in its structure and spectral characteristics. Such conformational changes open the possibility for protein-protein interactions between OCP and the PBs core (i.e., activation of photoprotection mechanisms) or the fluorescence recovery protein. Even though OCP was discovered in 1981, little was known about the conformation of its active form until recently, as well as about the properties of homologs of its N and C domains. Studies carried out during recent years have made a breakthrough in understanding of the structural-functional organization of OCP and have enabled discovery of new aspects of the regulation of photoprotection processes in cyanobacteria. This review focuses on aspects of protein-protein interactions between the main participants of photoprotection reactions and on certain properties of representatives of newly discovered families of OCP homologs.
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Affiliation(s)
- N N Sluchanko
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow, 119071, Russia.
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46
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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. PHOTOSYNTHESIS RESEARCH 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] [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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Magdaong NCM, Blankenship RE. Photoprotective, excited-state quenching mechanisms in diverse photosynthetic organisms. J Biol Chem 2018; 293:5018-5025. [PMID: 29298897 DOI: 10.1074/jbc.tm117.000233] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Light-harvesting complexes (LHCs) serve a dual role in photosynthesis, depending on the prevailing light conditions. In low light, they ensure photosynthetic efficiency by maximizing the light absorption cross-section and subsequent energy storage. Under excess light conditions, LHCs perform photoprotective quenching functions to prevent harmful chemical species such as triplet chlorophyll and singlet oxygen from forming and damaging the photosynthetic apparatus. In this Minireview, various photoprotective quenching mechanisms that have been identified in different photosynthetic organisms are surveyed and summarized, and implications for improving photosynthetic productivity are briefly discussed.
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Affiliation(s)
- Nikki Cecil M Magdaong
- From the Departments of Biology and Chemistry and.,the Photosynthetic Antenna Research Center, Washington University in Saint Louis, St. Louis, Missouri 63130
| | - Robert E Blankenship
- From the Departments of Biology and Chemistry and .,the Photosynthetic Antenna Research Center, Washington University in Saint Louis, St. Louis, Missouri 63130
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48
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The photocycle of orange carotenoid protein conceals distinct intermediates and asynchronous changes in the carotenoid and protein components. Sci Rep 2017; 7:15548. [PMID: 29138423 PMCID: PMC5686206 DOI: 10.1038/s41598-017-15520-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 10/27/2017] [Indexed: 11/30/2022] Open
Abstract
The 35-kDa Orange Carotenoid Protein (OCP) is responsible for photoprotection in cyanobacteria. It acts as a light intensity sensor and efficient quencher of phycobilisome excitation. Photoactivation triggers large-scale conformational rearrangements to convert OCP from the orange OCPO state to the red active signaling state, OCPR, as demonstrated by various structural methods. Such rearrangements imply a complete, yet reversible separation of structural domains and translocation of the carotenoid. Recently, dynamic crystallography of OCPO suggested the existence of photocycle intermediates with small-scale rearrangements that may trigger further transitions. In this study, we took advantage of single 7 ns laser pulses to study carotenoid absorption transients in OCP on the time-scale from 100 ns to 10 s, which allowed us to detect a red intermediate state preceding the red signaling state, OCPR. In addition, time-resolved fluorescence spectroscopy and the assignment of carotenoid-induced quenching of different tryptophan residues derived thereof revealed a novel orange intermediate state, which appears during the relaxation of photoactivated OCPR to OCPO. Our results show asynchronous changes between the carotenoid- and protein-associated kinetic components in a refined mechanistic model of the OCP photocycle, but also introduce new kinetic signatures for future studies of OCP photoactivity and photoprotection.
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Song C, Liu X, Song Y, Liu R, Gao H, Han L, Peng J. Key blackening and stinking pollutants in Dongsha River of Beijing: Spatial distribution and source identification. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 200:335-346. [PMID: 28595127 DOI: 10.1016/j.jenvman.2017.05.088] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 05/15/2017] [Accepted: 05/28/2017] [Indexed: 06/07/2023]
Abstract
Elimination of black-stinking water contamination has been listed as an urgent task in the Water pollution prevention action plan promulgated by State Council of China. However, the key blackening and stinking pollutants and their sources are still unclear. In this study, water quality of a black-stinking urban river in Beijing, Dongsha River, was evaluated firstly; then the distribution of the blackening and stinking pollutants was investigated, and the key pollutants and their potential sources were identified; and finally, the health risk of those pollutants was assessed. The results showed that NH3N, total phosphorus, dissolved oxygen and chemical oxygen demand ranged from 1.3 to 5.3 mg/L, 0.7-3.0 mg/L, 1.0-3.2 mg/L and 29-104 mg/L, respectively. The value of TP-based trophic level index indicated that Dongsha River reached severe eutrophication level; the maximum value of chroma and odor level reached 32 and 4, respectively. The main dissolved organic compounds included aromatic protein II, soluble microbiological metabolites, fulvic acids and humic acids. The blackening pollutants Fe, Mn, Cu and S2- were extensively detected, with significantly spatial differences along the river. Dimethyl sulfide, β-ionone, 2-methylisoborneol and geosmin were identified to be the stinking pollutants. Their concentrations covered wide ranges, and even the lowest concentration value was thousands of times higher than its olfactory threshold. Correlation analysis indicated that in the overlaying water S2- was the key blackening pollutant, while β-ionone and geosmin were the key stinking pollutants. Principal components analysis combining with the site survey revealed their potential sources. S2- was mainly associated with the decomposition of endogenous sulfur-containing organics; β-ionone might be generated by the endogenous β-carotene bio-conversion and the exogenous discharges, while geosmin might originate from the endogenous humus bio-conversion and anthropic wastes. Furthermore, multi-metals in the sediment posed health risks to children, while dimethyl sulfide had non-cancer health risk for adults and children.
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Affiliation(s)
- Chen Song
- College of Water Science, Beijing Normal University, Beijing, 100018, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xiaoling Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Yonghui Song
- College of Water Science, Beijing Normal University, Beijing, 100018, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Ruixia Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Hongjie Gao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Lu Han
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Jianfeng Peng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
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Discovery of carotenoid red-shift in endolithic cyanobacteria from the Atacama Desert. Sci Rep 2017; 7:11116. [PMID: 28894222 PMCID: PMC5593868 DOI: 10.1038/s41598-017-11581-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 08/22/2017] [Indexed: 11/18/2022] Open
Abstract
The biochemical responses of rock-inhabiting cyanobacteria towards native environmental stresses were observed in vivo in one of the Earth’s most challenging extreme climatic environments. The cryptoendolithic cyanobacterial colonization, dominated by Chroococcidiopsis sp., was studied in an ignimbrite at a high altitude volcanic area in the Atacama Desert, Chile. Change in the carotenoid composition (red-shift) within a transect through the cyanobacteria dominant microbial community (average thickness ~1 mm) was unambiguously revealed in their natural endolithic microhabitat. The amount of red shifted carotenoid, observed for the first time in a natural microbial ecosystem, is depth dependent, and increased with increasing proximity to the rock surface, as proven by resonance Raman imaging and point resonance Raman profiling. It is attributed to a light-dependent change in carotenoid conjugation, associated with the light-adaptation strategy of cyanobacteria. A hypothesis is proposed for the possible role of an orange carotenoid protein (OCP) mediated non-photochemical quenching (NPQ) mechanism that influences the observed spectral behavior. Simultaneously, information about the distribution of scytonemin and phycobiliproteins was obtained. Scytonemin was detected in the uppermost cyanobacteria aggregates. A reverse signal intensity gradient of phycobiliproteins was registered, increasing with deeper positions as a response of the cyanobacterial light harvesting complex to low-light conditions.
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