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Paschenko VZ, Lukashev EP, Mamedov MD, Gvozdev DA, Knox PP. Effect of cationic antiseptics on fluorescent characteristics and electron transfer in cyanobacterial photosystem I complexes. PHOTOSYNTHESIS RESEARCH 2024; 159:241-251. [PMID: 37480468 DOI: 10.1007/s11120-023-01039-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 07/09/2023] [Indexed: 07/24/2023]
Abstract
In this study, the effects of cationic antiseptics such as chlorhexidine, picloxidine, miramistin, and octenidine at concentrations up to 150 µM on fluorescence spectra and its lifetimes, as well as on light-induced electron transfer in protein-pigment complexes of photosystem I (PSI) isolated from cyanobacterium Synechocystis sp. PCC 6803 have been studied. In doing so, octenidine turned out to be the most "effective" in terms of its influence on the spectral and functional characteristics of PSI complexes. It has been shown that the rate of energy migration from short-wavelength forms of light-harvesting chlorophyll to long-wavelength ones slows down upon addition of octenidine to the PSI suspension. After photo-separation of charges between the primary electron donor P700 and the terminal iron-sulfur center(s) FA/FB, the rate of forward electron transfer from (FA/FB)- to the external medium slows down while the rate of charge recombination between reduced FA/FB- and photooxidized P700+ increases. The paper considers the possible causes of the observed action of the antiseptic.
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Affiliation(s)
- Vladimir Z Paschenko
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Eugene P Lukashev
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Mahir D Mamedov
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory 1, Build. 40, Moscow, Russia, 119992
| | - Daniil A Gvozdev
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234.
| | - Peter P Knox
- Biophysical Department, Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
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2
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Ji D, Luo M, Guo Y, Li Q, Kong L, Ge H, Wang Q, Song Q, Zeng X, Ma J, Wang Y, Meurer J, Chi W. Efficient scavenging of reactive carbonyl species in chloroplasts is required for light acclimation and fitness of plants. THE NEW PHYTOLOGIST 2023; 240:676-693. [PMID: 37545368 DOI: 10.1111/nph.19156] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 07/03/2023] [Indexed: 08/08/2023]
Abstract
Reactive carbonyl species (RCS) derived from lipid peroxides can act as critical damage or signaling mediators downstream of reactive oxygen species by modifying target proteins. However, their biological effects and underlying mechanisms remain largely unknown in plants. Here, we have uncovered the mechanism by which the RCS 4-hydroxy-(E)-2-nonenal (HNE) participates in photosystem II (PSII) repair cycle of chloroplasts, a crucial process for maintaining PSII activity under high and changing light conditions. High Light Sensitive 1 (HLT1) is a potential NADPH-dependent reductase in chloroplasts. Deficiency of HLT1 had no impact on the growth of Arabidopsis plants under normal light conditions but increased sensitivity to high light, which resulted from a defective PSII repair cycle. In hlt1 plants, the accumulation of HNE-modified D1 subunit of PSII was observed, which did not affect D1 degradation but hampered the dimerization of repaired PSII monomers and reassembly of PSII supercomplexes on grana stacks. HLT1 is conserved in all photosynthetic organisms and has functions in overall growth and plant fitness in both Arabidopsis and rice under naturally challenging field conditions. Our work provides the mechanistic basis underlying RCS scavenging in light acclimation and suggests a potential strategy to improve plant productivity by manipulating RCS signaling in chloroplasts.
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Affiliation(s)
- Daili Ji
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Manfei Luo
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yinjie Guo
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiuxin Li
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lingxi Kong
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haitao Ge
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Qi Wang
- Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Qiulai Song
- Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Xiannan Zeng
- Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Jinfang Ma
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Yingchun Wang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jörg Meurer
- Plant Molecular Biology, Faculty of Biology, Ludwig-Maximilians-University, D-82152, Planegg-Martinsried, Munich, Germany
| | - Wei Chi
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
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Paschenko VZ, Lukashev EP, Mamedov MD, Korvatovskiy BN, Knox PP. Influence of the antiseptic octenidine on spectral characteristics and energy migration processes in photosystem II core complexes. PHOTOSYNTHESIS RESEARCH 2023; 155:93-105. [PMID: 36335236 PMCID: PMC9638271 DOI: 10.1007/s11120-022-00972-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Herein, the effect of cationic antiseptics (chlorhexidine, picloxidine, miramistin, octenidine) on the initial processes of the delivery of light energy and its efficient use by the reaction centers in intact spinach photosystem II core complexes has been investigated. The characteristic effects-an increase in the fluorescence yield of light-harvesting pigments and a slowdown in the rate of energy migration in bacterial photosynthetic chromatophores has been recently demonstrated mainly in the presence of octenidine (Strakhovskaya et al., in Photosynth Res 147:197-209, 2021; Knox et al., in Photosynth Res, https://doi.org/10.1007/s11120-022-00909-8 , 2022). In this study, we also observed that in the presence of octenidine, the fluorescence intensity of photosystem II core complexes increases by 5-10 times, and the rate of energy migration from antennae to the reaction centers decreases by 3 times. In addition, with an increase in the concentration of this antiseptic, a new effect related to a shift of the spectrum, absorption and fluorescence to the short-wavelength region has been found. Similar effects were observed when detergent Triton X-100 was added to photosystem II samples. We concluded that the antiseptic primarily affects the structure of the internal light-harvesting antenna (CP43 and CP47), through which the excitation energy is delivered to the reaction center. As a result of such an impact, the chlorophyll molecules in this structure are destabilized and their optical and functional characteristics change.
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Affiliation(s)
- Vladimir Z Paschenko
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Eugene P Lukashev
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Mahir D Mamedov
- A.N.Belozersky Institute of Physico-Chemical Biology, Moscow State University, Leninskye Gory 1, Build. 40, Moscow, Russia, 119992
| | - Boris N Korvatovskiy
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234
| | - Peter P Knox
- Biophysical Department, Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskye Gory 1, Build. 12, Moscow, Russia, 119234.
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Puskar R, Du Truong C, Swain K, Chowdhury S, Chan KY, Li S, Cheng KW, Wang TY, Poh YP, Mazor Y, Liu H, Chou TF, Nannenga BL, Chiu PL. Molecular asymmetry of a photosynthetic supercomplex from green sulfur bacteria. Nat Commun 2022; 13:5824. [PMID: 36192412 PMCID: PMC9529944 DOI: 10.1038/s41467-022-33505-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
The photochemical reaction center (RC) features a dimeric architecture for charge separation across the membrane. In green sulfur bacteria (GSB), the trimeric Fenna-Matthews-Olson (FMO) complex mediates the transfer of light energy from the chlorosome antenna complex to the RC. Here we determine the structure of the photosynthetic supercomplex from the GSB Chlorobaculum tepidum using single-particle cryogenic electron microscopy (cryo-EM) and identify the cytochrome c subunit (PscC), two accessory protein subunits (PscE and PscF), a second FMO trimeric complex, and a linker pigment between FMO and the RC core. The protein subunits that are assembled with the symmetric RC core generate an asymmetric photosynthetic supercomplex. One linker bacteriochlorophyll (BChl) is located in one of the two FMO-PscA interfaces, leading to differential efficiencies of the two energy transfer branches. The two FMO trimeric complexes establish two different binding interfaces with the RC cytoplasmic surface, driven by the associated accessory subunits. This structure of the GSB photosynthetic supercomplex provides mechanistic insight into the light excitation energy transfer routes and a possible evolutionary transition intermediate of the bacterial photosynthetic supercomplex from the primitive homodimeric RC.
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Affiliation(s)
- Ryan Puskar
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Chloe Du Truong
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
- Rampart Bioscience, Monrovia, CA, 91016, USA
| | - Kyle Swain
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Saborni Chowdhury
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Ka-Yi Chan
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Shan Li
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Kai-Wen Cheng
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Ting Yu Wang
- Proteome Exploration Laboratory, Beckman Institute, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Yu-Ping Poh
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
- Center for Mechanisms of Evolution, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Yuval Mazor
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Haijun Liu
- Department of Biology, Washington University, St. Louis, MO, 63130, USA
| | - Tsui-Fen Chou
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
- Proteome Exploration Laboratory, Beckman Institute, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Brent L Nannenga
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Po-Lin Chiu
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA.
- Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.
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Pandit A. Structural dynamics of light harvesting proteins, photosynthetic membranes and cells observed with spectral editing solid-state NMR. J Chem Phys 2022; 157:025101. [DOI: 10.1063/5.0094446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photosynthetic light-harvesting complexes have a remarkable capacity to perform robust photo physics at ambient temperatures and in fluctuating environments. Protein conformational dynamics and membrane mobility are processes that contribute to the light-harvesting efficiencies and control photoprotective responses. This short review describes the application of Magic Angle Spinning (MAS) NMR spectroscopy for characterizing the structural dynamics of pigment, protein and thylakoid membrane components related to light harvesting and photoprotection. I will discuss the use of dynamics-based spectral editing solid-state NMR for distinguishing rigid and mobile components and assessing protein, pigment and lipid dynamics on sub-nanosecond to millisecond timescales. Dynamic spectral editing NMR has been applied to investigate Light-Harvesting Complex II (LHCII) protein conformational dynamics inside lipid bilayers and in native membranes. Furthermore, we used the NMR approach to assess thylakoid membrane dynamics. Finally, it is shown that dynamics-based spectral editing NMR, for reducing spectral complexity, by filtering motion-dependent signals, enabled us to follow processes in live photosynthetic cells.
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Yoshihara A, Kobayashi K. Lipids in photosynthetic protein complexes in the thylakoid membrane of plants, algae, and cyanobacteria. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:2735-2750. [PMID: 35560200 DOI: 10.1093/jxb/erac017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 01/27/2022] [Indexed: 06/15/2023]
Abstract
In the thylakoid membrane of cyanobacteria and chloroplasts, many proteins involved in photosynthesis are associated with or integrated into the fluid bilayer matrix formed by four unique glycerolipid classes, monogalactosyldiacylglycerol, digalactosyldiacylglycerol, sulfoquinovosyldiacylglycerol, and phosphatidylglycerol. Biochemical and molecular genetic studies have revealed that these glycerolipids play essential roles not only in the formation of thylakoid lipid bilayers but also in the assembly and functions of photosynthetic complexes. Moreover, considerable advances in structural biology have identified a number of lipid molecules within the photosynthetic complexes such as PSI and PSII. These data have provided important insights into the association of lipids with protein subunits in photosynthetic complexes and the distribution of lipids in the thylakoid membrane. Here, we summarize recent high-resolution observations of lipid molecules in the structures of photosynthetic complexes from plants, algae, and cyanobacteria, and evaluate the distribution of lipids among photosynthetic protein complexes and thylakoid lipid bilayers. By integrating the structural information into the findings from biochemical and molecular genetic studies, we highlight the conserved and differentiated roles of lipids in the assembly and functions of photosynthetic complexes among plants, algae, and cyanobacteria.
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Affiliation(s)
- Akiko Yoshihara
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, OsakaJapan
| | - Koichi Kobayashi
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, OsakaJapan
- Faculty of Liberal Arts and Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, OsakaJapan
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Monteiro JP, Costa E, Melo T, Domingues P, Fort A, Domingues MR, Sulpice R. Lipidome in-depth characterization highlights the nutritional value and species-specific idiosyncrasies of different Ulva species. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Azadi-Chegeni F, Thallmair S, Ward ME, Perin G, Marrink SJ, Baldus M, Morosinotto T, Pandit A. Protein dynamics and lipid affinity of monomeric, zeaxanthin-binding LHCII in thylakoid membranes. Biophys J 2022; 121:396-409. [PMID: 34971616 PMCID: PMC8822613 DOI: 10.1016/j.bpj.2021.12.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/02/2021] [Accepted: 12/23/2021] [Indexed: 02/03/2023] Open
Abstract
The xanthophyll cycle in the antenna of photosynthetic organisms under light stress is one of the most well-known processes in photosynthesis, but its role is not well understood. In the xanthophyll cycle, violaxanthin (Vio) is reversibly transformed to zeaxanthin (Zea) that occupies Vio binding sites of light-harvesting antenna proteins. Higher monomer/trimer ratios of the most abundant light-harvesting protein, the light-harvesting complex II (LHCII), usually occur in Zea accumulating membranes and have been observed in plants after prolonged illumination and during high-light acclimation. We present a combined NMR and coarse-grained simulation study on monomeric LHCII from the npq2 mutant that constitutively binds Zea in the Vio binding pocket. LHCII was isolated from 13C-enriched npq2 Chlamydomonas reinhardtii (Cr) cells and reconstituted in thylakoid lipid membranes. NMR results reveal selective changes in the fold and dynamics of npq2 LHCII compared with the trimeric, wild-type and show that npq2 LHCII contains multiple mono- or digalactosyl diacylglycerol lipids (MGDG and DGDG) that are strongly protein bound. Coarse-grained simulations on npq2 LHCII embedded in a thylakoid lipid membrane agree with these observations. The simulations show that LHCII monomers have more extensive lipid contacts than LHCII trimers and that protein-lipid contacts are influenced by Zea. We propose that both monomerization and Zea binding could have a functional role in modulating membrane fluidity and influence the aggregation and conformational dynamics of LHCII with a likely impact on photoprotection ability.
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Affiliation(s)
- Fatemeh Azadi-Chegeni
- Leiden Institute of Chemistry, Department of Solid-State NMR, Leiden University, Leiden, the Netherlands
| | - Sebastian Thallmair
- Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Groningen, the Netherlands; Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany
| | - Meaghan E Ward
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, the Netherlands
| | - Giorgio Perin
- Department of Biology, University of Padua, Padua, Italy
| | - Siewert J Marrink
- Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Groningen, the Netherlands
| | - Marc Baldus
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, the Netherlands
| | | | - Anjali Pandit
- Leiden Institute of Chemistry, Department of Solid-State NMR, Leiden University, Leiden, the Netherlands.
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9
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Ivanov AG, Krol M, Savitch LV, Szyszka-Mroz B, Roche J, Sprott DP, Selstam E, Wilson KW, Gardiner R, Öquist G, Hurry VM, Hüner NPA. The decreased PG content of pgp1 inhibits PSI photochemistry and limits reaction center and light-harvesting polypeptide accumulation in response to cold acclimation. PLANTA 2022; 255:36. [PMID: 35015152 DOI: 10.1007/s00425-022-03819-0] [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: 08/10/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Decreased PG constrains PSI activity due to inhibition of transcript and polypeptide abundance of light-harvesting and reaction center polypeptides generating a reversible, yellow phenotype during cold acclimation of pgp1. Cold acclimation of the Arabidopsis pgp1 mutant at 5 °C resulted in a pale-yellow phenotype with abnormal chloroplast ultrastructure compared to its green phenotype upon growth at 20 °C despite a normal cold-acclimation response at the transcript level. In contrast, wild type maintained its normal green phenotype and chloroplast ultrastructure irrespective of growth temperature. In contrast to cold acclimation of WT, growth of pgp1 at 5 °C limited the accumulation of Lhcbs and Lhcas assessed by immunoblotting. However, a novel 43 kD polypeptide of Lhcb1 as well as a 29 kD polypeptide of Lhcb3 accumulated in the soluble fraction which was absent in the thylakoid membrane fraction of cold-acclimated pgp1 which was not observed in WT. Cold acclimation of pgp1 destabilized the Chl-protein complexes associated with PSI and predisposed energy distribution in favor of PSII rather than PSI compared to the WT. Functionally, in vivo PSI versus PSII photochemistry was inhibited in cold-acclimated pgp1 to a greater extent than in WT relative to controls. Greening of the pale-yellow pgp1 was induced when cold-acclimated pgp1 was shifted from 5 to 20 °C which resulted in a marked decrease in excitation pressure to a level comparable to WT. Concomitantly, Lhcbs and Lhcas accumulated with a simultaneous decrease in the novel 43 and 29kD polypeptides. We conclude that the reduced levels of phosphatidyldiacylglycerol in the pgp1 limit the capacity of the mutant to maintain the structure and function of its photosynthetic apparatus during cold acclimation. Thus, maintenance of normal thylakoid phosphatidyldiacylglycerol levels is essential to stabilize the photosynthetic apparatus during cold acclimation.
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Affiliation(s)
- Alexander G Ivanov
- Department of Biology and the Biotron Centre for Experimental Climate Change Research, University of Western Ontario, London, ON, N6A 5B7, Canada
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. bl. 21, 1113, Sofia, Bulgaria
| | - Marianna Krol
- Department of Biology and the Biotron Centre for Experimental Climate Change Research, University of Western Ontario, London, ON, N6A 5B7, Canada
| | - Leonid V Savitch
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A OC6, Canada
| | - Beth Szyszka-Mroz
- Department of Biology and the Biotron Centre for Experimental Climate Change Research, University of Western Ontario, London, ON, N6A 5B7, Canada
| | - Jessica Roche
- Department of Biology and the Biotron Centre for Experimental Climate Change Research, University of Western Ontario, London, ON, N6A 5B7, Canada
- , 6/136 Austin St, Mt. Victoria, Wellington, 6011, New Zealand
| | - D P Sprott
- Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, Ottawa, ON, K1A OC6, Canada
| | - Eva Selstam
- Department of Plant Physiology, Umeå Plant Science Centre, University of Umeå, 90187, Umeå, Sweden
| | - Kenneth W Wilson
- Department of Biology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Richard Gardiner
- Department of Biology and the Biotron Centre for Experimental Climate Change Research, University of Western Ontario, London, ON, N6A 5B7, Canada
| | - Gunnar Öquist
- Department of Plant Physiology, Umeå Plant Science Centre, University of Umeå, 90187, Umeå, Sweden
| | - Vaughan M Hurry
- Department of Plant Physiology, Umeå Plant Science Centre, University of Umeå, 90187, Umeå, Sweden
| | - Norman P A Hüner
- Department of Biology and the Biotron Centre for Experimental Climate Change Research, University of Western Ontario, London, ON, N6A 5B7, Canada.
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10
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Plant LHC-like proteins show robust folding and static non-photochemical quenching. Nat Commun 2021; 12:6890. [PMID: 34824207 PMCID: PMC8617258 DOI: 10.1038/s41467-021-27155-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 11/02/2021] [Indexed: 11/17/2022] Open
Abstract
Life on Earth depends on photosynthesis, the conversion of light energy into chemical energy. Plants collect photons by light harvesting complexes (LHC)-abundant membrane proteins containing chlorophyll and xanthophyll molecules. LHC-like proteins are similar in their amino acid sequence to true LHC antennae, however, they rather serve a photoprotective function. Whether the LHC-like proteins bind pigments has remained unclear. Here, we characterize plant LHC-like proteins (LIL3 and ELIP2) produced in the cyanobacterium Synechocystis sp. PCC 6803 (hereafter Synechocystis). Both proteins were associated with chlorophyll a (Chl) and zeaxanthin and LIL3 was shown to be capable of quenching Chl fluorescence via direct energy transfer from the Chl Qy state to zeaxanthin S1 state. Interestingly, the ability of the ELIP2 protein to quench can be acquired by modifying its N-terminal sequence. By employing Synechocystis carotenoid mutants and site-directed mutagenesis we demonstrate that, although LIL3 does not need pigments for folding, pigments stabilize the LIL3 dimer.
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11
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Yang F, Xiao K, Pan H, Liu J. Chloroplast: The Emerging Battlefield in Plant-Microbe Interactions. FRONTIERS IN PLANT SCIENCE 2021; 12:637853. [PMID: 33747017 PMCID: PMC7966814 DOI: 10.3389/fpls.2021.637853] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 01/28/2021] [Indexed: 05/08/2023]
Abstract
Higher plants and some algae convert the absorbed light into chemical energy through one of the most important organelles, chloroplast, for photosynthesis and store it in the form of organic compounds to supply their life activities. However, more and more studies have shown that the role of chloroplasts is more than a factory for photosynthesis. In the process of light conversion to chemical energy, any damage to the components of chloroplast may affect the photosynthesis efficiency and promote the production of by-products, reactive oxygen species, that are mainly produced in the chloroplasts. Substantial evidence show that chloroplasts are also involved in the battle of plants and microbes. Chloroplasts are important in integrating a variety of external environmental stimuli and regulate plant immune responses by transmitting signals to the nucleus and other cell compartments through retrograde signaling pathways. Besides, chloroplasts can also regulate the biosynthesis and signal transduction of phytohormones, including salicylic acid and jasmonic acid, to affect the interaction between the plants and microbes. Since chloroplasts play such an important role in plant immunity, correspondingly, chloroplasts have become the target of pathogens. Different microbial pathogens target the chloroplast and affect its functions to promote their colonization in the host plants.
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Affiliation(s)
| | | | | | - Jinliang Liu
- College of Plant Sciences, Jilin University, Changchun, China
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12
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Korotych OI, Nguyen TT, Reagan BC, Burch-Smith TM, Bruce BD. Poly(styrene-co-maleic acid)-mediated isolation of supramolecular membrane protein complexes from plant thylakoids. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2021; 1862:148347. [PMID: 33253667 DOI: 10.1016/j.bbabio.2020.148347] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 11/09/2020] [Accepted: 11/21/2020] [Indexed: 12/25/2022]
Abstract
Derivatives of poly(styrene-co-maleic acid) (pSMA), have recently emerged as effective reagents for extracting membrane protein complexes from biological membranes. Despite recent progress in using SMAs to study artificial and bacterial membranes, very few reports have addressed their use in studying the highly abundant and well characterized thylakoid membranes. Recently, we tested the ability of twelve commercially available SMA copolymers with different physicochemical properties to extract membrane protein complexes (MPCs) from spinach thylakoid membrane. Based on the efficacy of both protein and chlorophyll extraction, we have found five highly efficient SMA copolymers: SMA® 1440, XIRAN® 25010, XIRAN® 30010, SMA® 17352, and SMA® PRO 10235, that show promise in extracting MPCs from chloroplast thylakoids. To further advance the application of these polymers for studying biomembrane organization, we have examined the composition of thylakoid supramolecular protein complexes extracted by the five SMA polymers mentioned above. Two commonly studied plants, spinach (Spinacia oleracea) and pea (Pisum sativum), were used for extraction as model biomembranes. We found that the pSMAs differentially extract protein complexes from spinach and pea thylakoids. Based on their differential activity, which correlates with the polymer chemical structure, pSMAs can be divided into two groups: unfunctionalized polymers and ester derivatives.
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Affiliation(s)
- Olena I Korotych
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee at Knoxville, TN 37996, United States of America
| | - Thao T Nguyen
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee at Knoxville, TN 37996, United States of America
| | - Brandon C Reagan
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee at Knoxville, TN 37996, United States of America
| | - Tessa M Burch-Smith
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee at Knoxville, TN 37996, United States of America
| | - Barry D Bruce
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee at Knoxville, TN 37996, United States of America; Department of Chemical and Biomolecular Engineering, University of Tennessee at Knoxville, TN 37996, United States of America.
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13
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Dell'Aglio E. Carotenoid composition affects thylakoid morphology and membrane fluidity. PLANT PHYSIOLOGY 2021; 185:21-22. [PMID: 33631814 PMCID: PMC8133654 DOI: 10.1093/plphys/kiaa020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 06/12/2023]
Affiliation(s)
- Elisa Dell'Aglio
- Institut National des Sciences Appliquées de Lyon, 69100 Villeurbanne, France
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14
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Bykowski M, Mazur R, Wójtowicz J, Suski S, Garstka M, Mostowska A, Kowalewska Ł. Too rigid to fold: Carotenoid-dependent decrease in thylakoid fluidity hampers the formation of chloroplast grana. PLANT PHYSIOLOGY 2021; 185:210-227. [PMID: 33631810 PMCID: PMC8133577 DOI: 10.1093/plphys/kiaa009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 10/10/2020] [Indexed: 06/11/2023]
Abstract
In chloroplasts of land plants, the thylakoid network is organized into appressed regions called grana stacks and loosely arranged parallel stroma thylakoids. Many factors determining such intricate structural arrangements have been identified so far, including various thylakoid-embedded proteins, and polar lipids that build the thylakoid matrix. Although carotenoids are important components of proteins and the lipid phase of chloroplast membranes, their role in determining the thylakoid network structure remains elusive. We studied 2D and 3D thylakoid network organization in carotenoid-deficient mutants (ccr1-1, lut5-1, szl1-1, and szl1-1npq1-2) of Arabidopsis (Arabidopsis thaliana) to reveal the structural role of carotenoids in the formation and dynamics of the internal chloroplast membrane system. The most significant structural aberrations took place in chloroplasts of the szl1-1 and szl1-1npq1-2 plants. Increased lutein/carotene ratio in these mutants impaired the formation of grana, resulting in a significant decrease in the number of thylakoids used to build a particular stack. Further, combined biochemical and biophysical analyses revealed that hampered grana folding was related to decreased thylakoid membrane fluidity and significant changes in the amount, organization, and phosphorylation status of photosystem (PS) II (PSII) supercomplexes in the szl1-1 and szl1-1npq1-2 plants. Such changes resulted from a synergistic effect of lutein overaccumulation in the lipid matrix and a decreased level of carotenes bound with PS core complexes. Moreover, more rigid membrane in the lutein overaccumulating plants led to binding of Rubisco to the thylakoid surface, additionally providing steric hindrance for the dynamic changes in the level of membrane folding.
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Affiliation(s)
- Michał Bykowski
- Department of Plant Anatomy and Cytology, Institute of Plant Experimental Biology and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw 02-096, Poland
| | - Radosław Mazur
- Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Warsaw 02-096, Poland
| | - Joanna Wójtowicz
- Department of Plant Anatomy and Cytology, Institute of Plant Experimental Biology and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw 02-096, Poland
| | - Szymon Suski
- Laboratory of Electron Microscopy, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw 02-093, Poland
| | - Maciej Garstka
- Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Warsaw 02-096, Poland
| | - Agnieszka Mostowska
- Department of Plant Anatomy and Cytology, Institute of Plant Experimental Biology and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw 02-096, Poland
| | - Łucja Kowalewska
- Department of Plant Anatomy and Cytology, Institute of Plant Experimental Biology and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw 02-096, Poland
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15
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Nami F, Tian L, Huber M, Croce R, Pandit A. Lipid and protein dynamics of stacked and cation-depletion induced unstacked thylakoid membranes. BBA ADVANCES 2021; 1:100015. [PMID: 37082020 PMCID: PMC10074959 DOI: 10.1016/j.bbadva.2021.100015] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Chloroplast thylakoid membranes in plants and green algae form 3D architectures of stacked granal membranes interconnected by unstacked stroma lamellae. They undergo dynamic structural changes as a response to changing light conditions that involve grana unstacking and lateral supramolecular reorganization of the integral membrane protein complexes. We assessed the dynamics of thylakoid membrane components and addressed how they are affected by thylakoid unstacking, which has consequences for protein mobility and the diffusion of small electron carriers. By a combined nuclear and electron paramagnetic-resonance approach the dynamics of thylakoid lipids was assessed in stacked and cation-depletion induced unstacked thylakoids of Chlamydomonas (C.) reinhardtii. We could distinguish between structural, bulk and annular lipids and determine membrane fluidity at two membrane depths: close to the lipid headgroups and in the lipid bilayer center. Thylakoid unstacking significantly increased the dynamics of bulk and annular lipids in both areas and increased the dynamics of protein helices. The unstacking process was associated with membrane reorganization and loss of long-range ordered Photosystem II- Light-Harvesting Complex II (PSII-LHCII) complexes. The fluorescence lifetime characteristics associated with membrane unstacking are similar to those associated with state transitions in intact C. reinhardtii cells. Our findings could be relevant for understanding the structural and functional implications of thylakoid unstacking that is suggested to take place during several light-induced processes, such as state transitions, photoacclimation, photoinhibition and PSII repair.
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Affiliation(s)
- Faezeh Nami
- Institute of Chemistry, Leiden University, 2333 CC, Leiden, The Netherlands
| | - Lijin Tian
- Institute of Chemistry, Leiden University, 2333 CC, Leiden, The Netherlands
| | - Martina Huber
- Department of Physics, Huygens-Kamerlingh Onnes Laboratory, Leiden University, 2300 RA, Leiden, The Netherlands
| | - Roberta Croce
- Department of Physics and Astronomy, VU University Amsterdam, 1081 HV, Amsterdam, The Netherlands
| | - Anjali Pandit
- Institute of Chemistry, Leiden University, 2333 CC, Leiden, The Netherlands
- Corresponding author:
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16
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Kovács T, Ahres M, Pálmai T, Kovács L, Uemura M, Crosatti C, Galiba G. Decreased R:FR Ratio in Incident White Light Affects the Composition of Barley Leaf Lipidome and Freezing Tolerance in a Temperature-Dependent Manner. Int J Mol Sci 2020; 21:ijms21207557. [PMID: 33066276 PMCID: PMC7593930 DOI: 10.3390/ijms21207557] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/29/2020] [Accepted: 10/08/2020] [Indexed: 02/06/2023] Open
Abstract
In cereals, C-repeat binding factor genes have been defined as key components of the light quality-dependent regulation of frost tolerance by integrating phytochrome-mediated light and temperature signals. This study elucidates the differences in the lipid composition of barley leaves illuminated with white light or white light supplemented with far-red light at 5 or 15 °C. According to LC-MS analysis, far-red light supplementation increased the amount of monogalactosyldiacylglycerol species 36:6, 36:5, and 36:4 after 1 day at 5 °C, and 10 days at 15 °C resulted in a perturbed content of 38:6 species. Changes were observed in the levels of phosphatidylethanolamine, and phosphatidylserine under white light supplemented with far-red light illumination at 15 °C, whereas robust changes were observed in the amount of several phosphatidylserine species at 5 °C. At 15 °C, the amount of some phosphatidylglycerol species increased as a result of white light supplemented with far-red light illumination after 1 day. The ceramide (42:2)-3 content increased regardless of the temperature. The double-bond index of phosphatidylglycerol, phosphatidylserine, phosphatidylcholine ceramide together with total double-bond index changed when the plant was grown at 15 °C as a function of white light supplemented with far-red light. white light supplemented with far-red light increased the monogalactosyldiacylglycerol/diacylglycerol ratio as well. The gene expression changes are well correlated with the alterations in the lipidome.
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Affiliation(s)
- Terézia Kovács
- Biological Research Centre, Institute of Plant Biology, H-6701 Szeged, Hungary;
- Department of Plant Biology, University of Szeged, 6720 Szeged, Hungary
- Correspondence:
| | - Mohamed Ahres
- Centre for Agricultural Research, Agricultural Institute, 2462 Martonvásár, Hungary; (M.A.); (T.P.); (G.G.)
- Festetics Doctoral School, Georgikon Campus, Szent István University, H-2100 Gödöllő, Hungary
| | - Tamás Pálmai
- Centre for Agricultural Research, Agricultural Institute, 2462 Martonvásár, Hungary; (M.A.); (T.P.); (G.G.)
| | - László Kovács
- Biological Research Centre, Institute of Plant Biology, H-6701 Szeged, Hungary;
| | - Matsuo Uemura
- Department of Plant-Bioscience, Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan;
| | - Cristina Crosatti
- CREA Research Centre for Genomics and Bioinformatics, Fiorenzuola d’Arda, 29017 San Protaso, Italy;
| | - Gabor Galiba
- Centre for Agricultural Research, Agricultural Institute, 2462 Martonvásár, Hungary; (M.A.); (T.P.); (G.G.)
- Festetics Doctoral School, Georgikon Campus, Szent István University, H-2100 Gödöllő, Hungary
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17
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Li L, Li F, Wang Y, Yang C, Lu C, Liu C, Sun R. An innovative artificial photosystem II constructed from PSII core of Thermosynechococcus vulcanus and LHCII of Pisum sativum - A new approach for studying the function of photosynthetic antenna. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 154:160-170. [PMID: 32563040 DOI: 10.1016/j.plaphy.2020.05.030] [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: 03/08/2020] [Revised: 05/23/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
In photosynthesis, the antenna system captures solar energy and transfers the excitations to photosystem II (PSII) core complex where charge separation, water splitting and oxygen evolution occur. In the evolution of photosynthesis from aquatic to terrestrial environments, the structure of PSII core complex was highly conserved while a variety of antenna forms became differentiated. In order to study the principles for energy transport from antenna to the PSII reaction center, we have explored whether the major light harvesting complex of PSII (LHCII) of higher plants can transfer energy to the cyanobacteria PSII core complexes (CC). For this purpose, LHCII from pea and CC from Thermosynechococcus vulcanus were isolated and co-reconstituted into liposome at LHCII:CC molar ratios of 2:1, 4:1 and 6:1, respectively. Chemical-cross linking followed by LC-MS/MS analysis confirmed the biochemical interaction between LHCII and CC in the liposome membrane. The analyses of 77 K fluorescence emission spectra and antenna cross section of PSII indicated that LHCII can transfer energy directly to the cyanobacterial CC. The study has laid the basis for further research on the mechanism of energy transfer from LHCII to PSII CC. This result may also open a new possibility for design and development of new artificial PSII in the application of solar energy conversion.
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Affiliation(s)
- Ling Li
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing, 100049, China
| | - Fei Li
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing, 100049, China
| | - Yue Wang
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing, 100049, China
| | - Chunhong Yang
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing, 100049, China; Qingdao Institute, Shanghai Institute of Technological Physics, Chinese Academy of Sciences, Binhai Road 50, Qingdao, 264000, China.
| | - Congming Lu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Cheng Liu
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing, 100049, China.
| | - Ruixue Sun
- Qingdao Institute, Shanghai Institute of Technological Physics, Chinese Academy of Sciences, Binhai Road 50, Qingdao, 264000, China.
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18
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Wilhelm C, Goss R, Garab G. The fluid-mosaic membrane theory in the context of photosynthetic membranes: Is the thylakoid membrane more like a mixed crystal or like a fluid? JOURNAL OF PLANT PHYSIOLOGY 2020; 252:153246. [PMID: 32777580 DOI: 10.1016/j.jplph.2020.153246] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/14/2020] [Accepted: 07/17/2020] [Indexed: 06/11/2023]
Abstract
Since the publication of the fluid-mosaic membrane theory by Singer and Nicolson in 1972 generations of scientists have adopted this fascinating concept for all biological membranes. Assuming the membrane as a fluid implies that the components embedded in the lipid bilayer can freely diffuse like swimmers in a water body. During the detailed biochemical analysis of the thylakoid protein components of chloroplasts from higher plants and algae, in the '80 s and '90 s it became clear that photosynthetic membranes are not homogeneous either in the vertical or the lateral directions. The lateral heterogeneity became obvious by the differentiation of grana and stroma thylakoids, but also the margins have been identified with a highly specific protein pattern. Further refinement of the fluid mosaic model was needed to take into account the presence of non-bilayer lipids, which are the most abundant lipids in all energy-converting membranes, and the polymorphism of lipid phases, which has also been documented in thylakoid membranes. These observations lead to the question, how mobile the components are in the lipid phase and how this ordering is made and maintained and how these features might be correlated with the non-bilayer propensity of the membrane lipids. Assuming instead of free diffusion, a "controlled neighborhood" replaced the model of fluidity by the model of a "mixed crystal structure". In this review we describe why basic photosynthetic regulation mechanisms depend on arrays of crystal-like lipid-protein macro-assemblies. The mechanisms which define the ordering in macrodomains are still not completely clear, but some recent experiments give an idea how this fascinating order is produced, adopted and maintained. We use the operation of the xanthophyll cycle as a rather well understood model challenging and complementing the standard Singer-Nicolson model via assigning special roles to non-bilayer lipids and non-lamellar lipid phases in the structure and function of thylakoid membranes.
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Affiliation(s)
- Christian Wilhelm
- Leipzig University, Institute of Biology, SenProf Algal Biotechnology, Permoserstr. 15, 04315, Leipzig, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, D-04103, Leipzig, Germany.
| | - Reimund Goss
- Leipzig University, Institute of Biology, Department of Plant Physiology, Johannisallee 21-23, D-04103, Leipzig, Germany
| | - Gyözö Garab
- Biological Research Centre, Institute of Plant Biology, Temesvári körút 62, H-6726, Szeged, Hungary; University of Ostrava, Department of Physics, Faculty of Science, Chittussiho 10, CZ-710 00, Ostrava, Slezská Ostrava, Czech Republic
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19
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Bhaduri S, Singh SK, Cohn W, Hasan SS, Whitelegge JP, Cramer WA. A novel chloroplast super-complex consisting of the ATP synthase and photosystem I reaction center. PLoS One 2020; 15:e0237569. [PMID: 32817667 PMCID: PMC7444523 DOI: 10.1371/journal.pone.0237569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 07/29/2020] [Indexed: 11/18/2022] Open
Abstract
Several 'super-complexes' of individual hetero-oligomeric membrane protein complexes, whose function is to facilitate intra-membrane electron and proton transfer and harvesting of light energy, have been previously characterized in the mitochondrial cristae and chloroplast thylakoid membranes. We report the presence of an intra-membrane super-complex dominated by the ATP-synthase, photosystem I (PSI) reaction-center complex and the ferredoxin-NADP+ Reductase (FNR) in the thylakoid membrane. The presence of the super-complex has been documented by mass spectrometry, clear-native PAGE and Western Blot analyses. This is the first documented presence of ATP synthase in a super-complex with the PSI reaction-center located in the non-appressed stromal domain of the thylakoid membrane.
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Affiliation(s)
- Satarupa Bhaduri
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana, United States of America
| | - Sandeep K Singh
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana, United States of America
| | - Whitaker Cohn
- Pasarow Mass Spectrometry Laboratory, The Jane and Terry Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California/Los Angeles, Los Angeles, California, United States of America
| | - S. Saif Hasan
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana, United States of America
| | - Julian P. Whitelegge
- Pasarow Mass Spectrometry Laboratory, The Jane and Terry Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California/Los Angeles, Los Angeles, California, United States of America
| | - William A. Cramer
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana, United States of America
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20
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Chen M, Perez-Boerema A, Zhang L, Li Y, Yang M, Li S, Amunts A. Distinct structural modulation of photosystem I and lipid environment stabilizes its tetrameric assembly. NATURE PLANTS 2020; 6:314-320. [PMID: 32170279 DOI: 10.1038/s41477-020-0610-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 01/30/2020] [Indexed: 05/19/2023]
Abstract
Photosystem I (PSI) is able to form different oligomeric states across various species. To reveal the structural basis for PSI dimerization and tetramerization, we structurally investigated PSI from the cyanobacterium Anabaena. This revealed a disrupted trimerization domain due to lack of the terminal residues of PsaL in the lumen, which resulted in PSI dimers with loose connections between monomers and weaker energy-coupled chlorophylls than in the trimer. At the dimer surface, specific phospholipids, cofactors and interactions in combination facilitated recruitment of another dimer to form a tetramer. Taken together, the relaxed luminal connections and lipid specificity at the dimer interface account for membrane curvature. PSI tetramer assembly appears to increase the surface area of the thylakoid membrane, which would contribute to PSI crowding.
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Affiliation(s)
- Ming Chen
- Beijing Engineering Research Center for Biofuels, Institute of Nuclear and New, Energy Technology, Tsinghua University, Beijing, P. R. China
| | - Annemarie Perez-Boerema
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Solna, Sweden
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Laixing Zhang
- Ministry of Education Key Laboratory of Protein Science, Tsinghua-Peking Joint, Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing, P. R. China
| | - Yanxue Li
- Beijing Engineering Research Center for Biofuels, Institute of Nuclear and New, Energy Technology, Tsinghua University, Beijing, P. R. China
| | - Maojun Yang
- Ministry of Education Key Laboratory of Protein Science, Tsinghua-Peking Joint, Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing, P. R. China
| | - Shizhong Li
- Beijing Engineering Research Center for Biofuels, Institute of Nuclear and New, Energy Technology, Tsinghua University, Beijing, P. R. China.
| | - Alexey Amunts
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Solna, Sweden.
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.
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21
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Xue M, Guo T, Ren M, Wang Z, Tang K, Zhang W, Wang M. Constitutive expression of chloroplast glycerol-3-phosphate acyltransferase from Ammopiptanthus mongolicus enhances unsaturation of chloroplast lipids and tolerance to chilling, freezing and oxidative stress in transgenic Arabidopsis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 143:375-387. [PMID: 31542639 DOI: 10.1016/j.plaphy.2019.07.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 05/02/2023]
Abstract
Chloroplast glycerol-3-phosphate acyltransferase (GPAT) is the first key enzyme determining the unsaturation of phosphatidylglycerol (PG) in thylakoid membranes and is involved in the tolerance of plants to chilling, heat and high salinity. However, whether the GPAT affects plant tolerance to other stressors has been scarcely reported. Ammopiptanthus mongolicus is the only evergreen broadleaf shrub growing in the central Asian desert, and it has a high tolerance to harsh environments, especially extreme cold. This study aimed to characterize the physiological function of AmGPAT from A. mongolicus. The transcription of AmGPAT was markedly induced by cold and drought but differentially suppressed by heat and high salinity in the laboratory-cultured seedlings. The gene also had the highest transcription levels in the leaves of shrubs naturally growing in the wild during the late autumn and winter months throughout the year. Moreover, AmGPAT was most abundantly expressed in leaves and immature pods rather than other organs of the shrubs. Constitutive expression of AmGPAT in Arabidopsis increased the levels of cis-unsaturated fatty acids, especially that of linolenic acid (18:3), mainly in PG but also in other chloroplast lipids in transgenic lines. More importantly, the transgene significantly increased the tolerance of the transgenics not only to chilling but also to freezing and oxidative stress at both the cellular and whole-plant levels. In contrast, this gene reduced heat tolerance of the transgenic plants. This study improves the current understanding of chloroplast GPAT in plant tolerance against abiotic stressors through regulating the unsaturation of chloroplast lipids, mainly that of PG.
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Affiliation(s)
- Min Xue
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
| | - Ting Guo
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
| | - Meiyan Ren
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
| | - Zhilin Wang
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
| | - Kuangang Tang
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
| | - Wenjun Zhang
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
| | - Maoyan Wang
- College of Life Sciences, Inner Mongolia Agricultural University, No. 306 Zhaowuda Street, Hohhot, 010018, China.
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22
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On the interface of light-harvesting antenna complexes and reaction centers in oxygenic photosynthesis. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2019; 1860:148079. [PMID: 31518567 DOI: 10.1016/j.bbabio.2019.148079] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/30/2019] [Accepted: 09/01/2019] [Indexed: 02/07/2023]
Abstract
Photosynthetic pigment-protein complexes (PPCs) accomplish light-energy capture and photochemistry in natural photosynthesis. In this review, we examine three pigment protein complexes in oxygenic photosynthesis: light-harvesting antenna complexes and two reaction centers: Photosystem II (PSII), and Photosystem I (PSI). Recent technological developments promise unprecedented insights into how these multi-component protein complexes are assembled into higher order structures and thereby execute their function. Furthermore, the interfacial domain between light-harvesting antenna complexes and PSII, especially the potential roles of the structural loops from CP29 and the PB-loop of ApcE in higher plant and cyanobacteria, respectively, are discussed. It is emphasized that the structural nuances are required for the structural dynamics and consequently for functional regulation in response to an ever-changing and challenging environment.
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23
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Petrova N, Todinova S, Paunov M, Kovács L, Taneva S, Krumova S. Thylakoid membrane unstacking increases LHCII thermal stability and lipid phase fluidity. J Bioenerg Biomembr 2018; 50:425-435. [PMID: 30607760 DOI: 10.1007/s10863-018-9783-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 12/20/2018] [Indexed: 11/26/2022]
Abstract
Thylakoids are highly protein-enriched membranes that harbor a number of multicomponent photosynthetic complexes. Similarly to other biological membranes the protein constituents are heterogeneously distributed laterally in the plane of the membrane, however the specific segregation into stacked (grana patches) and unstacked (stroma lamellae) membrane layers is a unique feature of the thylakoid. Both the lateral and the vertical arrangements of the integral membrane proteins within the three-dimensional thylakoid ultrastructure are thought to have important physiological function. In this work we explore the role of membrane stacking for the thermal stability of the photosynthetic complexes in thylakoid membranes. By means of circular dichroism and differential scanning calorimetry we demonstrate that the thermal stability of the monomeric and trimeric forms of the major light harvesting complex of photosystem II (LHCII) increases upon unstacking. This effect was suggested to be due to the detachment of LHCII from photosystem II and consequent attachment to photosystem I subunits and/or the fluidization of the lipid matrix upon unstacking. The changes in the physical properties of the protein and lipid membrane components upon unstacking result in strongly reduced photosystem II excitation energy utilization.
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Affiliation(s)
- Nia Petrova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Svetla Todinova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Momchil Paunov
- Department of Biophysics and Radiobiology, Faculty of Biology, Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
| | - Lászlo Kovács
- Biological Research Centre, Institute of Plant Biology, Szeged, Hungary
| | - Stefka Taneva
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Sashka Krumova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria.
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