1
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Marchetto F, Santaeufemia S, Lebiedzińska-Arciszewska M, Śliwińska MA, Pich M, Kurek E, Naziębło A, Strawski M, Solymosi D, Szklarczyk M, Bulska E, Szymański J, Wierzbicka M, Allahverdiyeva Y, Więckowski MR, Kargul J. Dynamic adaptation of the extremophilic red microalga Cyanidioschyzon merolae to high nickel stress. Plant Physiol Biochem 2024; 207:108365. [PMID: 38266563 DOI: 10.1016/j.plaphy.2024.108365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 12/23/2023] [Accepted: 01/10/2024] [Indexed: 01/26/2024]
Abstract
The order of Cyanidiales comprises seven acido-thermophilic red microalgal species thriving in hot springs of volcanic origin characterized by extremely low pH, moderately high temperatures and the presence of high concentrations of sulphites and heavy metals that are prohibitive for most other organisms. Little is known about the physiological processes underlying the long-term adaptation of these extremophiles to such hostile environments. Here, we investigated the long-term adaptive responses of a red microalga Cyanidioschyzon merolae, a representative of Cyanidiales, to extremely high nickel concentrations. By the comprehensive physiological, microscopic and elemental analyses we dissected the key physiological processes underlying the long-term adaptation of this model extremophile to high Ni exposure. These include: (i) prevention of significant Ni accumulation inside the cells; (ii) activation of the photoprotective response of non-photochemical quenching; (iii) significant changes of the chloroplast ultrastructure associated with the formation of prolamellar bodies and plastoglobuli together with loosening of the thylakoid membranes; (iv) activation of ROS amelioration machinery; and (v) maintaining the efficient respiratory chain functionality. The dynamically regulated processes identified in this study are discussed in the context of the mechanisms driving the remarkable adaptability of C. merolae to extremely high Ni levels exceeding by several orders of magnitude those found in the natural environment of the microalga. The processes identified in this study provide a solid basis for the future investigation of the specific molecular components and pathways involved in the adaptation of Cyanidiales to the extremely high Ni concentrations.
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Affiliation(s)
- Francesca Marchetto
- Solar Fuels Laboratory, Center of New Technologies, University of Warsaw, 02-097, Warsaw, Poland
| | - Sergio Santaeufemia
- Solar Fuels Laboratory, Center of New Technologies, University of Warsaw, 02-097, Warsaw, Poland
| | | | - Małgorzata A Śliwińska
- Laboratory of Imaging Tissue Structure and Function, Nencki Institute of Experimental Biology PAS, 02-093, Warsaw, Poland
| | - Magdalena Pich
- Biological and Chemical Research Center, Faculty of Chemistry, University of Warsaw, 02-089, Warsaw, Poland
| | - Eliza Kurek
- Biological and Chemical Research Center, Faculty of Chemistry, University of Warsaw, 02-089, Warsaw, Poland
| | - Aleksandra Naziębło
- Laboratory of Ecotoxicology, Institute of Botany, Faculty of Biology, University of Warsaw, 02-089, Warsaw, Poland
| | - Marcin Strawski
- Laboratory of Electrochemistry, Faculty of Chemistry, University of Warsaw, 02-089, Warsaw, Poland
| | - Daniel Solymosi
- Molecular Plant Biology Unit, Department of Life Technologies, University of Turku, Turku, FI-20014, Finland
| | - Marek Szklarczyk
- Laboratory of Electrochemistry, Faculty of Chemistry, University of Warsaw, 02-089, Warsaw, Poland
| | - Ewa Bulska
- Biological and Chemical Research Center, Faculty of Chemistry, University of Warsaw, 02-089, Warsaw, Poland
| | - Jędrzej Szymański
- Laboratory of Imaging Tissue Structure and Function, Nencki Institute of Experimental Biology PAS, 02-093, Warsaw, Poland
| | - Małgorzata Wierzbicka
- Laboratory of Ecotoxicology, Institute of Botany, Faculty of Biology, University of Warsaw, 02-089, Warsaw, Poland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology Unit, Department of Life Technologies, University of Turku, Turku, FI-20014, Finland
| | - Mariusz R Więckowski
- Laboratory of Mitochondrial Biology and Metabolism, Nencki Institute of Experimental Biology PAS, Warsaw, Poland
| | - Joanna Kargul
- Solar Fuels Laboratory, Center of New Technologies, University of Warsaw, 02-097, Warsaw, Poland.
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2
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Virkkala T, Kosourov S, Rissanen V, Siitonen V, Arola S, Allahverdiyeva Y, Tammelin T. Bioinspired mechanically stable all-polysaccharide based scaffold for photosynthetic production. J Mater Chem B 2023; 11:8788-8803. [PMID: 37668222 DOI: 10.1039/d3tb00919j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
We demonstrate the construction of water-stable, biocompatible and self-standing hydrogels as scaffolds for the photosynthetic production of ethylene using a bioinspired all-polysaccharidic design combining TEMPO-oxidised cellulose nanofibers (TCNF) and a cereal plant hemicellulose called mixed-linkage glucan (MLG). We compared three different molecular weight MLGs from barley to increase the wet strength of TCNF hydrogels, and to reveal the mechanisms defining the favourable interactions between the scaffold components. The interactions between MLGs and TCNF were revealed via adsorption studies and interfacial rheology investigations using quartz crystal microbalance with dissipation monitoring (QCM-D). Our results show that both the MLG solution stability and adsorption behaviour did not exactly follow the well-known polymer adsorption and solubility theories especially in the presence of co-solute ions, in this case nitrates. We prepared hydrogel scaffolds for microalgal immobilisation, and high wet strength hydrogels were achieved with very low dosages of MLG (0.05 wt%) to the TCNF matrix. The all-polysaccharic biocatalytic architectures remained stable and produced ethylene for 120 h with yields comparable to the state-of-the-art scaffolds. Due to its natural origin and biodegradability, MLG offers a clear advantage in comparison to synthetic scaffold components, allowing the mechanical properties and water interactions to be tailored.
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Affiliation(s)
- Tuuli Virkkala
- VTT Technical Research Centre of Finland Ltd, VTT, PO Box 1000, FI-02044 Espoo, Finland.
| | - Sergey Kosourov
- Molecular Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland.
| | - Ville Rissanen
- VTT Technical Research Centre of Finland Ltd, VTT, PO Box 1000, FI-02044 Espoo, Finland.
| | - Vilja Siitonen
- Molecular Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland.
| | - Suvi Arola
- VTT Technical Research Centre of Finland Ltd, VTT, PO Box 1000, FI-02044 Espoo, Finland.
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland.
| | - Tekla Tammelin
- VTT Technical Research Centre of Finland Ltd, VTT, PO Box 1000, FI-02044 Espoo, Finland.
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3
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Levä T, Rissanen V, Nikkanen L, Siitonen V, Heilala M, Phiri J, Maloney TC, Kosourov S, Allahverdiyeva Y, Mäkelä M, Tammelin T. Mapping Nanocellulose- and Alginate-Based Photosynthetic Cell Factory Scaffolds: Interlinking Porosity, Wet Strength, and Gas Exchange. Biomacromolecules 2023; 24:3484-3497. [PMID: 37384553 PMCID: PMC10428157 DOI: 10.1021/acs.biomac.3c00261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/20/2023] [Indexed: 07/01/2023]
Abstract
To develop efficient solid-state photosynthetic cell factories for sustainable chemical production, we present an interdisciplinary experimental toolbox to investigate and interlink the structure, operative stability, and gas transfer properties of alginate- and nanocellulose-based hydrogel matrices with entrapped wild-type Synechocystis PCC 6803 cyanobacteria. We created a rheological map based on the mechanical performance of the hydrogel matrices. The results highlighted the importance of Ca2+-cross-linking and showed that nanocellulose matrices possess higher yield properties, and alginate matrices possess higher rest properties. We observed higher porosity for nanocellulose-based matrices in a water-swollen state via calorimetric thermoporosimetry and scanning electron microscopy imaging. Finally, by pioneering a gas flux analysis via membrane-inlet mass spectrometry for entrapped cells, we observed that the porosity and rigidity of the matrices are connected to their gas exchange rates over time. Overall, these findings link the dynamic properties of the life-sustaining matrix to the performance of the immobilized cells in tailored solid-state photosynthetic cell factories.
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Affiliation(s)
- Tuukka Levä
- VTT
Technical Research Centre of Finland Ltd., VTT, P.O. Box 1000, FI-02044 Espoo, Finland
| | - Ville Rissanen
- VTT
Technical Research Centre of Finland Ltd., VTT, P.O. Box 1000, FI-02044 Espoo, Finland
| | - Lauri Nikkanen
- Molecular
Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland
| | - Vilja Siitonen
- Molecular
Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland
| | - Maria Heilala
- Department
of Applied Physics, Aalto University, FI-00076 Espoo, Finland
| | - Josphat Phiri
- Department
of Bioproducts and Biosystems, Aalto University, FI-00076 Espoo, Finland
| | - Thaddeus C. Maloney
- Department
of Bioproducts and Biosystems, Aalto University, FI-00076 Espoo, Finland
| | - Sergey Kosourov
- Molecular
Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular
Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland
| | - Mikko Mäkelä
- VTT
Technical Research Centre of Finland Ltd., VTT, P.O. Box 1000, FI-02044 Espoo, Finland
| | - Tekla Tammelin
- VTT
Technical Research Centre of Finland Ltd., VTT, P.O. Box 1000, FI-02044 Espoo, Finland
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Chovanček E, Salazar J, Şirin S, Allahverdiyeva Y. Microalgae from Nordic collections demonstrate biostimulant effect by enhancing plant growth and photosynthetic performance. Physiol Plant 2023; 175:e13911. [PMID: 37043258 DOI: 10.1111/ppl.13911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/31/2023] [Accepted: 04/06/2023] [Indexed: 06/19/2023]
Abstract
We investigated the biostimulant potential of six microalgal species from Nordic collections extracted with two different procedures: thermal hydrolysis with a weak solution of sulfuric acid accompanied by ultrasonication and bead-milling with aqueous extraction followed by centrifugation. To this aim, we designed a phenotyping pipeline consisting of a root growth assay in the model plant Arabidopsis thaliana, complemented with greenhouse experiments to evaluate lettuce yield (Lactuca sativa L. cv. Finstar) and photosynthetic performance. The best-performing hydrolyzed extracts stimulated Arabidopsis root elongation by 8%-13% and lettuce yield by 12%-15%. The in situ measured photosynthetic performance of lettuce was upregulated in the efficient extracts: PSII quantum yield increased by 26%-34%, and thylakoid proton flux increase was in the range of 34%-60%. In contrast, aqueous extracts acquired by bead-milling showed high dependence on biomass concentration in the extract and an overall plant growth enhancement was not attained in any of the applied dosages. Our results indicate that hydrolysis of the biomass can be a decisive factor for rendering effective plant biostimulants from microalgae.
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Affiliation(s)
- Erik Chovanček
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - João Salazar
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Sema Şirin
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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5
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Barone GD, Hubáček M, Malihan-Yap L, Grimm HC, Nikkanen L, Pacheco CC, Tamagnini P, Allahverdiyeva Y, Kourist R. Towards the rate limit of heterologous biotechnological reactions in recombinant cyanobacteria. Biotechnol Biofuels Bioprod 2023; 16:4. [PMID: 36609316 PMCID: PMC9825001 DOI: 10.1186/s13068-022-02237-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/04/2022] [Indexed: 01/09/2023]
Abstract
BACKGROUND Cyanobacteria have emerged as highly efficient organisms for the production of chemicals and biofuels. Yet, the productivity of the cell has been low for commercial application. Cyanobacterial photobiotransformations utilize photosynthetic electrons to form reducing equivalents, such as NADPH-to-fuel biocatalytic reactions. These photobiotransformations are a measure to which extent photosynthetic electrons can be deviated toward heterologous biotechnological processes, such as the production of biofuels. By expressing oxidoreductases, such as YqjM from Bacillus subtilis in Synechocystis sp. PCC 6803, a high specific activity was obtained in the reduction of maleimides. Here, we investigated the possibility to accelerate the NAD(P)H-consuming redox reactions by addition of carbohydrates as exogenous carbon sources such as D-Glucose under light and darkness. RESULTS A 1.7-fold increase of activity (150 µmol min-1 gDCW-1) was observed upon addition of D-Glucose at an OD750 = 2.5 (DCW = 0.6 g L-1) in the biotransformation of 2-methylmaleimide. The stimulating effect of D-Glucose was also observed at higher cell densities in light and dark conditions as well as in the reduction of other substrates. No increase in both effective photosynthetic yields of Photosystem II and Photosystem I was found upon D-Glucose addition. However, we observed higher NAD(P)H fluorescence when D-Glucose was supplemented, suggesting increased glycolytic activity. Moreover, the system was scaled-up (working volume of 200 mL) in an internally illuminated Bubble Column Reactor exhibiting a 2.4-fold increase of specific activity under light-limited conditions. CONCLUSIONS Results show that under photoautotrophic conditions at a specific activity of 90 µmol min-1 gDCW-1, the ene-reductase YqjM in Synechocystis sp. PCC 6803 is not NAD(P)H saturated, which is an indicator that an increase of the rates of heterologous electron consuming processes for catalysis and biofuel production will require funnelling further reducing power from the photosynthetic chain toward heterologous processes.
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Affiliation(s)
- Giovanni Davide Barone
- grid.410413.30000 0001 2294 748XBiocatalysis and Protein Engineering, Institute of Molecular Biotechnology, Graz University of Technology, 8010 Graz, Austria ,grid.5808.50000 0001 1503 7226i3S - Instituto de Investigação e Inovação em Saúde, IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Michal Hubáček
- grid.1374.10000 0001 2097 1371Laboratory of Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Lenny Malihan-Yap
- grid.410413.30000 0001 2294 748XBiocatalysis and Protein Engineering, Institute of Molecular Biotechnology, Graz University of Technology, 8010 Graz, Austria
| | - Hanna C. Grimm
- grid.410413.30000 0001 2294 748XBiocatalysis and Protein Engineering, Institute of Molecular Biotechnology, Graz University of Technology, 8010 Graz, Austria
| | - Lauri Nikkanen
- grid.1374.10000 0001 2097 1371Laboratory of Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Catarina C. Pacheco
- grid.5808.50000 0001 1503 7226i3S - Instituto de Investigação e Inovação em Saúde, IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal
| | - Paula Tamagnini
- grid.5808.50000 0001 1503 7226i3S - Instituto de Investigação e Inovação em Saúde, IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal ,grid.5808.50000 0001 1503 7226Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Yagut Allahverdiyeva
- grid.1374.10000 0001 2097 1371Laboratory of Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Robert Kourist
- grid.410413.30000 0001 2294 748XBiocatalysis and Protein Engineering, Institute of Molecular Biotechnology, Graz University of Technology, 8010 Graz, Austria
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6
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Santana‐Sánchez A, Nikkanen L, Werner E, Tóth G, Ermakova M, Kosourov S, Walter J, He M, Aro E, Allahverdiyeva Y. Flv3A facilitates O 2 photoreduction and affects H 2 photoproduction independently of Flv1A in diazotrophic Anabaena filaments. New Phytol 2023; 237:126-139. [PMID: 36128660 PMCID: PMC10092803 DOI: 10.1111/nph.18506] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 09/10/2022] [Indexed: 05/23/2023]
Abstract
The model heterocyst-forming filamentous cyanobacterium Anabaena sp. PCC 7120 (Anabaena) is a typical example of a multicellular organism capable of simultaneously performing oxygenic photosynthesis in vegetative cells and O2 -sensitive N2 -fixation inside heterocysts. The flavodiiron proteins have been shown to participate in photoprotection of photosynthesis by driving excess electrons to O2 (a Mehler-like reaction). Here, we performed a phenotypic and biophysical characterization of Anabaena mutants impaired in vegetative-specific Flv1A and Flv3A in order to address their physiological relevance in the bioenergetic processes occurring in diazotrophic Anabaena under variable CO2 conditions. We demonstrate that both Flv1A and Flv3A are required for proper induction of the Mehler-like reaction upon a sudden increase in light intensity, which is likely important for the activation of carbon-concentrating mechanisms and CO2 fixation. Under ambient CO2 diazotrophic conditions, Flv3A is responsible for moderate O2 photoreduction, independently of Flv1A, but only in the presence of Flv2 and Flv4. Strikingly, the lack of Flv3A resulted in strong downregulation of the heterocyst-specific uptake hydrogenase, which led to enhanced H2 photoproduction under both oxic and micro-oxic conditions. These results reveal a novel regulatory network between the Mehler-like reaction and the diazotrophic metabolism, which is of great interest for future biotechnological applications.
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Affiliation(s)
- Anita Santana‐Sánchez
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Lauri Nikkanen
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Elisa Werner
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Gábor Tóth
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Maria Ermakova
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Sergey Kosourov
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Julia Walter
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Meilin He
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Eva‐Mari Aro
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life TechnologiesUniversity of TurkuTurkuFI‐20014Finland
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7
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Salazar J, Santana-Sánchez A, Näkkilä J, Sirin S, Allahverdiyeva Y. Complete N and P removal from hydroponic greenhouse wastewater by Tetradesmus obliquus: A strategy for algal bioremediation and cultivation in Nordic countries. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.102988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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8
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Tóth GS, Siitonen V, Nikkanen L, Sovic L, Kallio P, Kourist R, Kosourov S, Allahverdiyeva Y. Photosynthetically produced sucrose by immobilized Synechocystis sp. PCC 6803 drives biotransformation in E. coli. Biotechnol Biofuels Bioprod 2022; 15:146. [PMID: 36575466 PMCID: PMC9795604 DOI: 10.1186/s13068-022-02248-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 12/14/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND Whole-cell biotransformation is a promising emerging technology for the production of chemicals. When using heterotrophic organisms such as E. coli and yeast as biocatalysts, the dependence on organic carbon source impairs the sustainability and economic viability of the process. As a promising alternative, photosynthetic cyanobacteria with low nutrient requirements and versatile metabolism, could offer a sustainable platform for the heterologous production of organic compounds directly from sunlight and CO2. This strategy has been applied for the photoautotrophic production of sucrose by a genetically engineered cyanobacterium, Synechocystis sp. PCC 6803 strain S02. As the key concept in the current work, this can be further used to generate organic carbon compounds for different heterotrophic applications, including for the whole-cell biotransformation by yeast and bacteria. RESULTS Entrapment of Synechocystis S02 cells in Ca2+-cross-linked alginate hydrogel beads improves the specific sucrose productivity by 86% compared to suspension cultures during 7 days of cultivation under salt stress. The process was further prolonged by periodically changing the medium in the vials for up to 17 days of efficient production, giving the final sucrose yield slightly above 3000 mg l-1. We successfully demonstrated that the medium enriched with photosynthetically produced sucrose by immobilized Synechocystis S02 cells supports the biotransformation of cyclohexanone to ε-caprolactone by the E. coli WΔcscR Inv:Parvi strain engineered to (i) utilize low concentrations of sucrose and (ii) perform biotransformation of cyclohexanone to ε-caprolactone. CONCLUSION We conclude that cell entrapment in Ca2+-alginate beads is an effective method to prolong sucrose production by the engineered cyanobacteria, while allowing efficient separation of the cells from the medium. This advantage opens up novel possibilities to create advanced autotroph-heterotroph coupled cultivation systems for solar-driven production of chemicals via biotransformation, as demonstrated in this work by utilizing the photosynthetically produced sucrose to drive the conversion of cyclohexanone to ε-caprolactone by engineered E. coli.
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Affiliation(s)
- Gábor Szilveszter Tóth
- grid.1374.10000 0001 2097 1371Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Vilja Siitonen
- grid.1374.10000 0001 2097 1371Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Lauri Nikkanen
- grid.1374.10000 0001 2097 1371Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Lucija Sovic
- grid.410413.30000 0001 2294 748XCell and Protein Engineering, Institute of Molecular Biotechnology, Graz University of Technology, 8010 Graz, Austria
| | - Pauli Kallio
- grid.1374.10000 0001 2097 1371Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Robert Kourist
- grid.410413.30000 0001 2294 748XCell and Protein Engineering, Institute of Molecular Biotechnology, Graz University of Technology, 8010 Graz, Austria
| | - Sergey Kosourov
- grid.1374.10000 0001 2097 1371Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
| | - Yagut Allahverdiyeva
- grid.1374.10000 0001 2097 1371Molecular Plant Biology, Department of Life Technologies, University of Turku, 20014 Turku, Finland
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9
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Muth-Pawlak D, Kreula S, Gollan PJ, Huokko T, Allahverdiyeva Y, Aro EM. Patterning of the Autotrophic, Mixotrophic, and Heterotrophic Proteomes of Oxygen-Evolving Cyanobacterium Synechocystis sp. PCC 6803. Front Microbiol 2022; 13:891895. [PMID: 35694301 PMCID: PMC9175036 DOI: 10.3389/fmicb.2022.891895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 03/25/2022] [Indexed: 11/13/2022] Open
Abstract
Proteomes of an oxygenic photosynthetic cyanobacterium, Synechocystis sp. PCC 6803, were analyzed under photoautotrophic (low and high CO2, assigned as ATLC and ATHC), photomixotrophic (MT), and light-activated heterotrophic (LAH) conditions. Allocation of proteome mass fraction to seven sub-proteomes and differential expression of individual proteins were analyzed, paying particular attention to photosynthesis and carbon metabolism–centered sub-proteomes affected by the quality and quantity of the carbon source and light regime upon growth. A distinct common feature of the ATHC, MT, and LAH cultures was low abundance of inducible carbon-concentrating mechanisms and photorespiration-related enzymes, independent of the inorganic or organic carbon source. On the other hand, these cells accumulated a respiratory NAD(P)H dehydrogenase I (NDH-11) complex in the thylakoid membrane (TM). Additionally, in glucose-supplemented cultures, a distinct NDH-2 protein, NdbA, accumulated in the TM, while the plasma membrane-localized NdbC and terminal oxidase decreased in abundance in comparison to both AT conditions. Photosynthetic complexes were uniquely depleted under the LAH condition but accumulated under the ATHC condition. The MT proteome displayed several heterotrophic features typical of the LAH proteome, particularly including the high abundance of ribosome as well as amino acid and protein biosynthesis machinery-related components. It is also noteworthy that the two equally light-exposed ATHC and MT cultures allocated similar mass fractions of the total proteome to the seven distinct sub-proteomes. Unique trophic condition-specific expression patterns were likewise observed among individual proteins, including the accumulation of phosphate transporters and polyphosphate polymers storing energy surplus in highly energetic bonds under the MT condition and accumulation under the LAH condition of an enzyme catalyzing cyanophycin biosynthesis. It is concluded that the rigor of cell growth in the MT condition results, to a great extent, by combining photosynthetic activity with high intracellular inorganic carbon conditions created upon glucose breakdown and release of CO2, besides the direct utilization of glucose-derived carbon skeletons for growth. This combination provides the MT cultures with excellent conditions for growth that often exceeds that of mere ATHC.
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10
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Erdem E, Malihan-Yap L, Assil-Companioni L, Grimm H, Barone GD, Serveau-Avesque C, Amouric A, Duquesne K, de Berardinis V, Allahverdiyeva Y, Alphand V, Kourist R. Photobiocatalytic Oxyfunctionalization with High Reaction Rate using a Baeyer-Villiger Monooxygenase from Burkholderia xenovorans in Metabolically Engineered Cyanobacteria. ACS Catal 2022; 12:66-72. [PMID: 35036041 PMCID: PMC8751089 DOI: 10.1021/acscatal.1c04555] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 12/03/2021] [Indexed: 01/26/2023]
Abstract
![]()
Baeyer–Villiger
monooxygenases (BVMOs) catalyze the oxidation
of ketones to lactones under very mild reaction conditions. This enzymatic
route is hindered by the requirement of a stoichiometric supply of
auxiliary substrates for cofactor recycling and difficulties with
supplying the necessary oxygen. The recombinant production of BVMO
in cyanobacteria allows the substitution of auxiliary organic cosubstrates
with water as an electron donor and the utilization of oxygen generated
by photosynthetic water splitting. Herein, we report the identification
of a BVMO from Burkholderia xenovorans (BVMOXeno) that exhibits higher reaction
rates in comparison to currently identified BVMOs. We report a 10-fold
increase in specific activity in comparison to cyclohexanone monooxygenase
(CHMOAcineto) in Synechocystis sp. PCC 6803 (25 vs 2.3 U gDCW–1 at
an optical density of OD750 = 10) and an initial rate of
3.7 ± 0.2 mM h–1. While the cells containing
CHMOAcineto showed a considerable reduction
of cyclohexanone to cyclohexanol, this unwanted side reaction was
almost completely suppressed for BVMOXeno, which was attributed to the much faster lactone formation and a
10-fold lower KM value of BVMOXeno toward cyclohexanone. Furthermore, the whole-cell
catalyst showed outstanding stereoselectivity. These results show
that, despite the self-shading of the cells, high specific activities
can be obtained at elevated cell densities and even further increased
through manipulation of the photosynthetic electron transport chain
(PETC). The obtained rates of up to 3.7 mM h–1 underline
the usefulness of oxygenic cyanobacteria as a chassis for enzymatic
oxidation reactions. The photosynthetic oxygen evolution can contribute
to alleviating the highly problematic oxygen mass-transfer limitation
of oxygen-dependent enzymatic processes.
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Affiliation(s)
- Elif Erdem
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria.,Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 UMR7313, 13397 Marseille, France
| | - Lenny Malihan-Yap
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Leen Assil-Companioni
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria.,ACIB GmbH, 8010 Graz, Austria
| | - Hanna Grimm
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Giovanni Davide Barone
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria.,i3S, Instituto de Investigação em Saúde Universidade do Porto & IBMC, Instituto de Biologia Molecular e Celular, R. Alfredo Allen 208, 4200-135 Porto, Portugal.,Departamento de Biologia Faculdade de Ciências, Universidade do Porto Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal
| | | | - Agnes Amouric
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 UMR7313, 13397 Marseille, France
| | - Katia Duquesne
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 UMR7313, 13397 Marseille, France
| | - Véronique de Berardinis
- Génomique métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, 91057 Evry, France
| | - Yagut Allahverdiyeva
- Molecular Plant Biology Unit, Department of Life Technologies, Faculty of Technology, University of Turku, Turku 20014, Finland
| | - Véronique Alphand
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 UMR7313, 13397 Marseille, France
| | - Robert Kourist
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria.,ACIB GmbH, 8010 Graz, Austria
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11
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Solymosi D, Shevela D, Allahverdiyeva Y. Nitric oxide represses photosystem II and NDH-1 in the cyanobacterium Synechocystis sp. PCC 6803. Biochim Biophys Acta Bioenerg 2022; 1863:148507. [PMID: 34728155 DOI: 10.1016/j.bbabio.2021.148507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 10/20/2021] [Accepted: 10/27/2021] [Indexed: 11/16/2022]
Abstract
Photosynthetic electron transfer comprises a series of light-induced redox reactions catalysed by multiprotein machinery in the thylakoid. These protein complexes possess cofactors susceptible to redox modifications by reactive small molecules. The gaseous radical nitric oxide (NO), a key signalling molecule in green algae and plants, has earlier been shown to bind to Photosystem (PS) II and obstruct electron transfer in plants. The effects of NO on cyanobacterial bioenergetics however, have long remained obscure. In this study, we exposed the model cyanobacterium Synechocystis sp. PCC 6803 to NO under anoxic conditions and followed changes in whole-cell fluorescence and oxidoreduction of P700 in vivo. Our results demonstrate that NO blocks photosynthetic electron transfer in cells by repressing PSII, PSI, and likely the NDH dehydrogenase-like complex 1 (NDH-1). We propose that iron‑sulfur clusters of NDH-1 complex may be affected by NO to such an extent that ferredoxin-derived electron injection to the plastoquinone pool, and thus cyclic electron transfer, may be inhibited. These findings reveal the profound effects of NO on Synechocystis cells and demonstrate the importance of controlled NO homeostasis in cyanobacteria.
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Affiliation(s)
- Daniel Solymosi
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, FI 20014, Finland
| | - Dmitry Shevela
- Chemical Biological Centre, Department of Chemistry, Umeå University, 90187 Umeå, Sweden
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, FI 20014, Finland.
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12
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Nikkanen L, Solymosi D, Jokel M, Allahverdiyeva Y. Regulatory electron transport pathways of photosynthesis in cyanobacteria and microalgae: Recent advances and biotechnological prospects. Physiol Plant 2021; 173:514-525. [PMID: 33764547 DOI: 10.1111/ppl.13404] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Cyanobacteria and microalgae perform oxygenic photosynthesis where light energy is harnessed to split water into oxygen and protons. This process releases electrons that are used by the photosynthetic electron transport chain to form reducing equivalents that provide energy for the cell metabolism. Constant changes in environmental conditions, such as light availability, temperature, and access to nutrients, create the need to balance the photochemical reactions and the metabolic demands of the cell. Thus, cyanobacteria and microalgae evolved several auxiliary electron transport (AET) pathways to disperse the potentially harmful over-supply of absorbed energy. AET pathways are comprised of electron sinks, e.g. flavodiiron proteins (FDPs) or other terminal oxidases, and pathways that recycle electrons around photosystem I, like NADPH-dehydrogenase-like complexes (NDH) or the ferredoxin-plastoquinone reductase (FQR). Under controlled conditions the need for these AET pathways is decreased and AET can even be energetically wasteful. Therefore, redirecting photosynthetic reducing equivalents to biotechnologically useful reactions, catalyzed by i.e. innate hydrogenases or heterologous enzymes, offers novel possibilities to apply photosynthesis research.
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Affiliation(s)
- Lauri Nikkanen
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Daniel Solymosi
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Martina Jokel
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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13
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Kallio P, Kugler A, Pyytövaara S, Stensjö K, Allahverdiyeva Y, Gao X, Lindblad P, Lindberg P. Photoautotrophic production of renewable ethylene by engineered cyanobacteria: Steering the cell metabolism towards biotechnological use. Physiol Plant 2021; 173:579-590. [PMID: 33864400 DOI: 10.1111/ppl.13430] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/05/2021] [Accepted: 04/13/2021] [Indexed: 06/12/2023]
Abstract
Ethylene is a volatile hydrocarbon with a massive global market in the plastic industry. The ethylene now used for commercial applications is produced exclusively from nonrenewable petroleum sources, while competitive biotechnological production systems do not yet exist. This review focuses on the currently developed photoautotrophic bioproduction strategies that enable direct solar-driven conversion of CO2 into ethylene, based on the use of genetically engineered photosynthetic cyanobacteria expressing heterologous ethylene forming enzyme (EFE) from Pseudomonas syringae. The emphasis is on the different engineering strategies to express EFE and to direct the cellular carbon flux towards the primary metabolite 2-oxoglutarate, highlighting associated metabolic constraints, and technical considerations on cultivation strategies and conditional parameters. While the research field has progressed towards more robust strains with better production profiles, and deeper understanding of the associated metabolic limitations, it is clear that there is room for significant improvement to reach industrial relevance. At the same time, existing information and the development of synthetic biology tools for engineering cyanobacteria open new possibilities for improving the prospects for the sustainable production of renewable ethylene.
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Affiliation(s)
- Pauli Kallio
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Amit Kugler
- Microbial Chemistry, Department of Chemistry-Ångström, Uppsala University, Uppsala, Sweden
| | - Samuli Pyytövaara
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Karin Stensjö
- Microbial Chemistry, Department of Chemistry-Ångström, Uppsala University, Uppsala, Sweden
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Xiang Gao
- Microbial Chemistry, Department of Chemistry-Ångström, Uppsala University, Uppsala, Sweden
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, China
| | - Peter Lindblad
- Microbial Chemistry, Department of Chemistry-Ångström, Uppsala University, Uppsala, Sweden
| | - Pia Lindberg
- Microbial Chemistry, Department of Chemistry-Ångström, Uppsala University, Uppsala, Sweden
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14
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Kosourov S, Böhm M, Senger M, Berggren G, Stensjö K, Mamedov F, Lindblad P, Allahverdiyeva Y. Photosynthetic hydrogen production: Novel protocols, promising engineering approaches and application of semi-synthetic hydrogenases. Physiol Plant 2021; 173:555-567. [PMID: 33860946 DOI: 10.1111/ppl.13428] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
Photosynthetic production of molecular hydrogen (H2 ) by cyanobacteria and green algae is a potential source of renewable energy. These organisms are capable of water biophotolysis by taking advantage of photosynthetic apparatus that links water oxidation at Photosystem II and reduction of protons to H2 downstream of Photosystem I. Although the process has a theoretical potential to displace fossil fuels, photosynthetic H2 production in its current state is not yet efficient enough for industrial applications due to a number of physiological, biochemical, and engineering barriers. This article presents a short overview of the metabolic pathways and enzymes involved in H2 photoproduction in cyanobacteria and green algae and our present understanding of the mechanisms of this process. We also summarize recent advances in engineering photosynthetic cell factories capable of overcoming the major barriers to efficient and sustainable H2 production.
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Affiliation(s)
- Sergey Kosourov
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Maximilian Böhm
- Molecular Biomimetics, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Moritz Senger
- Molecular Biomimetics, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Gustav Berggren
- Molecular Biomimetics, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Karin Stensjö
- Microbial Chemistry, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Fikret Mamedov
- Molecular Biomimetics, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Peter Lindblad
- Microbial Chemistry, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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15
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Allahverdiyeva Y, Aro EM, van Bavel B, Escudero C, Funk C, Heinonen J, Herfindal L, Lindblad P, Mäkinen S, Penttilä M, Sivonen K, Skogen Chauton M, Skomedal H, Skjermo J. NordAqua, a Nordic Center of Excellence to develop an algae-based photosynthetic production platform. Physiol Plant 2021; 173:507-513. [PMID: 33709388 DOI: 10.1111/ppl.13394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/25/2021] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
NordAqua is a multidisciplinary Nordic Center of Excellence funded by NordForsk Bioeconomy program (2017-2022). The research center promotes Blue Bioeconomy and endeavours to reform the use of natural resources in a environmentally sustainable way. In this short communication, we summarize particular outcomes of the consortium. The key research progress of NordAqua includes (1) improving of photosynthetisis, (2) developing novel photosynthetic cell factories that function in a "solar-driven direct CO2 capture to target bioproducts" mode, (3) promoting the diversity of Nordic cyanobacteria and algae as an abundant and resilient alternative for less sustainable forest biomass and for innovative production of biochemicals, and (4) improving the bio-based wastewater purification and nutrient recycling technologies to provide new tools for integrative circular economy platforms.
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Affiliation(s)
- Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Bert van Bavel
- Section of Environmental Pollutants, Norwegian Institute for Water Research, Oslo, Norway
| | - Carlos Escudero
- Section of Environmental Pollutants, Norwegian Institute for Water Research, Oslo, Norway
| | | | - Jarna Heinonen
- Department of Management and Entrepreneurship, School of Economics, University of Turku, Turku, Finland
| | - Lars Herfindal
- Centre for Pharmacy, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Peter Lindblad
- Microbial Chemistry, Department of Chemistry-Ångström, Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Sari Mäkinen
- Department of Production Systems, Natural Resources Institute Finland, Jokioinen, Finland
| | - Merja Penttilä
- Devision of Industrial Biotechnology and Food Solutions, VTT Technical Research Centre of Finland Ltd, Espoo, Finland
| | - Kaarina Sivonen
- Department of Microbiology, University of Helsinki, Helsinki, Finland
| | | | - Hanne Skomedal
- Division of Biotechnology and Plant Health, NIBIO, Ås, Norway
| | - Jorunn Skjermo
- Department of Fisheries and New Biomarine Industry, SINTEF Ocean, Trondheim, Norway
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16
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Santana-Sánchez A, Lynch F, Sirin S, Allahverdiyeva Y. Nordic cyanobacterial and algal lipids: Triacylglycerol accumulation, chemotaxonomy and bioindustrial potential. Physiol Plant 2021; 173:591-602. [PMID: 33928648 DOI: 10.1111/ppl.13443] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to capture and convert sunlight, water and nutrients into useful compounds make photosynthetic microbes ideal candidates for the bio-industrial factories of the future. However, the suitability of isolates from temperate regions to grow under Nordic conditions is questionable. In this work, we explore the chemotaxonomy of Nordic strains of cyanobacteria and one green alga and evaluate their potential as raw materials for the production of lipid-based bio-industrial compounds. Thin-layer chromatography was used to identify the presence of triacylglycerol, which were detected in the majority of strains. Fatty acid methyl ester profiles were analysed to determine the suitability of strains for the production of biodiesel or the production of polyunsaturated fatty acids for the nutraceutical industry. The Nordic Synechococcus strains were unique in demonstrating fatty acid profiles comprised mostly C14:0, C16:0 and C16:1 and lacking polyunsaturated fatty acids. These properties translated to superior predicted biodiesel qualities, including cetane number, cold filter plugging point and oxidative stability compared to the other evaluated strains. Polyunsaturated fatty acids were detected at high levels (38-53%), with Calothrix sp. 336/3 being abundant in two essential fatty acids, linoleic and alpha-linolenic acid (21 and 17%, respectively). Gamma-linoleic acid was the predominant polyunsaturated fatty acid for the remaining strains (13-21%). In addition to assessing the potential of Nordic strains for bio-industrial production, this work also discusses issues such as taxonomy and predictive modelling, which can affect the identification of prospective high-performing strains.
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Affiliation(s)
- Anita Santana-Sánchez
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Fiona Lynch
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Sema Sirin
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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17
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Plöhn M, Spain O, Sirin S, Silva M, Escudero-Oñate C, Ferrando-Climent L, Allahverdiyeva Y, Funk C. Wastewater treatment by microalgae. Physiol Plant 2021; 173:568-578. [PMID: 33860948 DOI: 10.1111/ppl.13427] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
The growth of the world's population increases the demand for fresh water, food, energy, and technology, which in turn leads to increasing amount of wastewater, produced both by domestic and industrial sources. These different wastewaters contain a wide variety of organic and inorganic compounds which can cause tremendous environmental problems if released untreated. Traditional treatment systems are usually expensive, energy demanding and are often still incapable of solving all challenges presented by the produced wastewaters. Microalgae are promising candidates for wastewater reclamation as they are capable of reducing the amount of nitrogen and phosphate as well as other toxic compounds including heavy metals or pharmaceuticals. Compared to the traditional systems, photosynthetic microalgae require less energy input since they use sunlight as their energy source, and at the same time lower the carbon footprint of the overall reclamation process. This mini-review focuses on recent advances in wastewater reclamation using microalgae. The most common microalgal strains used for this purpose are described as well as the challenges of using wastewater from different origins. We also describe the impact of climate with a particular focus on a Nordic climate.
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Affiliation(s)
- Martin Plöhn
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Olivia Spain
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Sema Sirin
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
| | - Mario Silva
- Institute for Energy Technology (IFE), Kjeller, Norway
| | | | | | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Life Technologies, University of Turku, Turku, Finland
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18
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Mustila H, Muth-Pawlak D, Aro EM, Allahverdiyeva Y. Global proteomic response of unicellular cyanobacterium Synechocystis sp. PCC 6803 to fluctuating light upon CO 2 step-down. Physiol Plant 2021; 173:305-320. [PMID: 34145600 DOI: 10.1111/ppl.13482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 06/09/2021] [Accepted: 06/14/2021] [Indexed: 06/12/2023]
Abstract
Photosynthetic cyanobacteria are exposed to rapid changes in light intensity in their natural habitats, as well as in photobioreactors. To understand the effects of such fluctuations on Synechocystis sp. PCC 6803, the global proteome of cells grown under a fluctuating light condition (low background light interrupted with high light pulses) was compared to the proteome of cells grown under constant light with concomitant acclimation of cells to low CO2 level. The untargeted global proteome of Synechocystis sp. PCC 6803 was analyzed by data-dependent acquisition (DDA), which relies on the high mass accuracy and sensitivity of orbitrap-based tandem mass spectrometry. In addition, a targeted selected reaction monitoring (SRM) approach was applied to monitor the proteomic changes in a strain lacking flavodiiron proteins Flv1 and Flv3. This strain is characterized by impaired growth and photosynthetic activity under fluctuating light. An obvious reprogramming of cell metabolism was observed in this study and was compared to a previous transcriptional analysis performed under the same fluctuating light regime. Cyanobacterial responses to fluctuating light correlated at mRNA and protein levels to some extent, but discrepancies indicate that several proteins are post-transcriptionally regulated (affecting observed protein abundances). The data suggest that Synechocystis sp. PCC 6803 maintain higher nitrogen assimilation, serving as an electron valve, for long-term acclimation to fluctuating light upon CO2 step-down. Although Flv1 and Flv3 are known to be crucial for the cells at the onset of illumination, the flavodiiron proteins, as well as components of carbon assimilation pathways, were less abundant under fluctuating light.
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Affiliation(s)
- Henna Mustila
- Molecular Plant Biology Unit, Department of Life Technologies, University of Turku, Turku, Finland
| | - Dorota Muth-Pawlak
- Molecular Plant Biology Unit, Department of Life Technologies, University of Turku, Turku, Finland
| | - Eva-Mari Aro
- Molecular Plant Biology Unit, Department of Life Technologies, University of Turku, Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology Unit, Department of Life Technologies, University of Turku, Turku, Finland
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19
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Salazar J, Valev D, Näkkilä J, Tyystjärvi E, Sirin S, Allahverdiyeva Y. Nutrient removal from hydroponic effluent by Nordic microalgae: From screening to a greenhouse photobioreactor operation. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102247] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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20
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Latonen RM, Cabrera JAW, Lund S, Kosourov S, Vajravel S, Boeva Z, Wang X, Xu C, Allahverdiyeva Y. Electrospinning of Electroconductive Water-Resistant Nanofibers of PEDOT-PSS, Cellulose Nanofibrils and PEO: Fabrication, Characterization, and Cytocompatibility. ACS Appl Bio Mater 2021; 4:483-493. [PMID: 35014302 DOI: 10.1021/acsabm.0c00989] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrically conductive composite nanofibers were fabricated using poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT-PSS) and cellulose nanofibrils (CNFs) via the electrospinning technique. Poly(ethylene oxide) (PEO) was used to assist the electrospinning process, and poly(ethylene glycol) diglycidyl ether was used to induce chemical cross-linking, enabling stability of the formed fibrous mats in water. The experimental parameters regarding the electrospinning polymer dispersion and electrospinning process were carefully studied to achieve a reproducible method to obtain bead-free nanofibrous mats with high stability after water contact, with an electrical conductivity of 13 ± 5 S m-1, thus making them suitable for bioelectrochemical applications. The morphology of the electrospun nanofibers was characterized by scanning electron microscopy, and the C/S ratio was determined with energy dispersive X-ray analysis. Cyclic voltammetric studies showed that the PEDOT-PSS/CNF/PEO composite fibers exhibited high electroactivity and high stability in water for at least two months. By infrared spectroscopy, the slightly modified fiber morphology after water contact was demonstrated to be due to dissolution of some part of the PEO in the fiber structure. The biocompatibility of the PEDOT-PSS/CNF/PEO composite fibers when used as an electroconductive substrate to immobilize microalgae and cyanobacteria in a photosynthetic bioelectrochemical cell was also demonstrated.
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Affiliation(s)
- Rose-Marie Latonen
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Jose Antonio Wrzosek Cabrera
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Sara Lund
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Sergey Kosourov
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Sindhujaa Vajravel
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Zhanna Boeva
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Xiaoju Wang
- Johan Gadolin Process Chemistry Centre, Laboratory of Natural Materials Technology, Åbo Akademi University, Porthansgatan 3, FI-20500 Turku/Åbo, Finland
| | - Chunlin Xu
- Johan Gadolin Process Chemistry Centre, Laboratory of Natural Materials Technology, Åbo Akademi University, Porthansgatan 3, FI-20500 Turku/Åbo, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
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21
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Heise K, Kontturi E, Allahverdiyeva Y, Tammelin T, Linder MB, Ikkala O. Nanocellulose: Recent Fundamental Advances and Emerging Biological and Biomimicking Applications. Adv Mater 2021; 33:e2004349. [PMID: 33289188 DOI: 10.1002/adma.202004349] [Citation(s) in RCA: 116] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/01/2020] [Indexed: 06/12/2023]
Abstract
In the effort toward sustainable advanced functional materials, nanocelluloses have attracted extensive recent attention. Nanocelluloses range from rod-like highly crystalline cellulose nanocrystals to longer and more entangled cellulose nanofibers, earlier denoted also as microfibrillated celluloses and bacterial cellulose. In recent years, they have spurred research toward a wide range of applications, ranging from nanocomposites, viscosity modifiers, films, barrier layers, fibers, structural color, gels, aerogels and foams, and energy applications, until filtering membranes, to name a few. Still, nanocelluloses continue to show surprisingly high challenges to master their interactions and tailorability to allow well-controlled assemblies for functional materials. Rather than trying to review the already extensive nanocellulose literature at large, here selected aspects of the recent progress are the focus. Water interactions, which are central for processing for the functional properties, are discussed first. Then advanced hybrid gels toward (multi)stimuli responses, shape-memory materials, self-healing, adhesion and gluing, biological scaffolding, and forensic applications are discussed. Finally, composite fibers are discussed, as well as nanocellulose as a strategy for improvement of photosynthesis-based chemicals production. In summary, selected perspectives toward new directions for sustainable high-tech functional materials science based on nanocelluloses are described.
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Affiliation(s)
- Katja Heise
- Department of Bioproducts and Biosystems, Aalto University, Espoo, FI-00076, Finland
- Center of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials Research, Aalto University, FI-00076, Finland
| | - Eero Kontturi
- Department of Bioproducts and Biosystems, Aalto University, Espoo, FI-00076, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
| | - Tekla Tammelin
- VTT Technical Research Centre of Finland Ltd, VTT, PO Box 1000, FIN-02044, Espoo, Finland
| | - Markus B Linder
- Department of Bioproducts and Biosystems, Aalto University, Espoo, FI-00076, Finland
- Center of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials Research, Aalto University, FI-00076, Finland
| | - Olli Ikkala
- Department of Bioproducts and Biosystems, Aalto University, Espoo, FI-00076, Finland
- Center of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials Research, Aalto University, FI-00076, Finland
- Department of Applied Physics, Aalto University, Espoo, FI-00076, Finland
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22
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Assil-Companioni L, Büchsenschütz HC, Solymosi D, Dyczmons-Nowaczyk NG, Bauer KKF, Wallner S, Macheroux P, Allahverdiyeva Y, Nowaczyk MM, Kourist R. Engineering of NADPH Supply Boosts Photosynthesis-Driven Biotransformations. ACS Catal 2020; 10:11864-11877. [PMID: 33101760 PMCID: PMC7574619 DOI: 10.1021/acscatal.0c02601] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 09/04/2020] [Indexed: 02/08/2023]
Abstract
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Light-driven biocatalysis
in recombinant cyanobacteria provides
highly atom-efficient cofactor regeneration via photosynthesis,
thereby remediating constraints associated with sacrificial cosubstrates.
However, despite the remarkable specific activities of photobiocatalysts,
self-shading at moderate-high cell densities limits efficient space-time-yields
of heterologous enzymatic reactions. Moreover, efficient integration
of an artificial electron sink into the tightly regulated network
of cyanobacterial electron pathways can be highly challenging. Here,
we used C=C bond reduction of 2-methylmaleimide by the NADPH-dependent
ene-reductase YqjM as a model reaction for light-dependent biotransformations.
Time-resolved NADPH fluorescence spectroscopy allowed direct monitoring
of in-cell YqjM activity and revealed differences in NADPH steady-state
levels and oxidation kinetics between different genetic constructs.
This effect correlates with specific activities of whole-cells, which
demonstrated conversions of >99%. Further channelling of electrons
toward heterologous YqjM by inactivation of the flavodiiron proteins
(Flv1/Flv3) led to a 2-fold improvement in specific activity at moderate
cell densities, thereby elucidating the possibility of accelerating
light-driven biotransformations by the removal of natural competing
electron sinks. In the best case, an initial product formation rate
of 18.3 mmol h–1 L–1 was reached,
allowing the complete conversion of a 60 mM substrate solution within
4 h.
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Affiliation(s)
- Leen Assil-Companioni
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010 Graz, Austria
- ACIB GmbH, Petersgasse 14, 8010 Graz, Austria
| | - Hanna C. Büchsenschütz
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010 Graz, Austria
| | - Dániel Solymosi
- Molecular Plant Biology unit, Department of Biochemistry, Faculty of Science and Engineering, University of Turku, Turku 20014, Finland
| | - Nina G. Dyczmons-Nowaczyk
- Department of Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - Kristin K. F. Bauer
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010 Graz, Austria
| | - Silvia Wallner
- Institute of Biochemistry, Graz University of Technology, Petersgasse 10, 8010 Graz, Austria
| | - Peter Macheroux
- Institute of Biochemistry, Graz University of Technology, Petersgasse 10, 8010 Graz, Austria
| | - Yagut Allahverdiyeva
- Molecular Plant Biology unit, Department of Biochemistry, Faculty of Science and Engineering, University of Turku, Turku 20014, Finland
| | - Marc M. Nowaczyk
- Department of Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany
| | - Robert Kourist
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010 Graz, Austria
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23
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Nikkanen L, Santana Sánchez A, Ermakova M, Rögner M, Cournac L, Allahverdiyeva Y. Functional redundancy between flavodiiron proteins and NDH-1 in Synechocystis sp. PCC 6803. Plant J 2020; 103:1460-1476. [PMID: 32394539 DOI: 10.1111/tpj.14812] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/30/2020] [Accepted: 05/05/2020] [Indexed: 05/09/2023]
Abstract
In oxygenic photosynthetic organisms, excluding angiosperms, flavodiiron proteins (FDPs) catalyze light-dependent reduction of O2 to H2 O. This alleviates electron pressure on the photosynthetic apparatus and protects it from photodamage. In Synechocystis sp. PCC 6803, four FDP isoforms function as hetero-oligomers of Flv1 and Flv3 and/or Flv2 and Flv4. An alternative electron transport pathway mediated by the NAD(P)H dehydrogenase-like complex (NDH-1) also contributes to redox hemostasis and the photoprotection of photosynthesis. Four NDH-1 types have been characterized in cyanobacteria: NDH-11 and NDH-12 , which function in respiration; and NDH-13 and NDH-14 , which function in CO2 uptake. All four types are involved in cyclic electron transport. Along with single FDP mutants (∆flv1 and Δflv3) and the double NDH-1 mutants (∆d1d2, which is deficient in NDH-11,2 and ∆d3d4, which is deficient in NDH-13,4 ), we studied triple mutants lacking one of Flv1 or Flv3, and NDH-11,2 or NDH-13,4 . We show that the presence of either Flv1/3 or NDH-11,2 , but not NDH-13,4 , is indispensable for survival during changes in growth conditions from high CO2 /moderate light to low CO2 /high light. Our results show functional redundancy between FDPs and NDH-11,2 under the studied conditions. We suggest that ferredoxin probably functions as a primary electron donor to both Flv1/3 and NDH-11,2 , allowing their functions to be dynamically coordinated for efficient oxidation of photosystem I and for photoprotection under variable CO2 and light availability.
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Affiliation(s)
- Lauri Nikkanen
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Anita Santana Sánchez
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Maria Ermakova
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Matthias Rögner
- Plant Biochemistry, Faculty of Biology & Biotechnology, Ruhr-University Bochum, Bochum, Germany
| | - Laurent Cournac
- Eco&Sols, University of Montpellier, IRD, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
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24
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Solymosi D, Nikkanen L, Muth-Pawlak D, Fitzpatrick D, Vasudevan R, Howe CJ, Lea-Smith DJ, Allahverdiyeva Y. Cytochrome c M Decreases Photosynthesis under Photomixotrophy in Synechocystis sp. PCC 6803. Plant Physiol 2020; 183:700-716. [PMID: 32317358 PMCID: PMC7271781 DOI: 10.1104/pp.20.00284] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 03/23/2020] [Indexed: 05/26/2023]
Abstract
Photomixotrophy is a metabolic state that enables photosynthetic microorganisms to simultaneously perform photosynthesis and metabolism of imported organic carbon substrates. This process is complicated in cyanobacteria, since many, including Synechocystis sp. PCC 6803, conduct photosynthesis and respiration in an interlinked thylakoid membrane electron transport chain. Under photomixotrophy, the cell must therefore tightly regulate electron fluxes from photosynthetic and respiratory complexes. In this study, we demonstrate, via characterization of photosynthetic apparatus and the proteome, that photomixotrophic growth results in a gradual inhibition of QA - reoxidation in wild-type Synechocystis, which largely decreases photosynthesis over 3 d of growth. This process is circumvented by deleting the gene encoding cytochrome c M (CytM), a cryptic c-type heme protein widespread in cyanobacteria. The ΔCytM strain maintained active photosynthesis over the 3-d period, demonstrated by high photosynthetic O2 and CO2 fluxes and effective yields of PSI and PSII. Overall, this resulted in a higher growth rate compared to that of the wild type, which was maintained by accumulation of proteins involved in phosphate and metal uptake, and cofactor biosynthetic enzymes. While the exact role of CytM has not been determined, a mutant deficient in the thylakoid-localized respiratory terminal oxidases and CytM (ΔCox/Cyd/CytM) displayed a phenotype similar to that of ΔCytM under photomixotrophy. This, in combination with other physiological data, and in contrast to a previous hypothesis, suggests that CytM does not transfer electrons to these complexes. In summary, our data suggest that CytM may have a regulatory role in photomixotrophy by modulating the photosynthetic capacity of cells.
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Affiliation(s)
- Daniel Solymosi
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Lauri Nikkanen
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Dorota Muth-Pawlak
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Duncan Fitzpatrick
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Ravendran Vasudevan
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, United Kingdom
| | - Christopher J Howe
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, United Kingdom
| | - David J Lea-Smith
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, United Kingdom
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
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25
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Santana-Sanchez A, Solymosi D, Mustila H, Bersanini L, Aro EM, Allahverdiyeva Y. Flavodiiron proteins 1-to-4 function in versatile combinations in O 2 photoreduction in cyanobacteria. eLife 2019; 8:e45766. [PMID: 31294693 PMCID: PMC6658166 DOI: 10.7554/elife.45766] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 07/10/2019] [Indexed: 12/15/2022] Open
Abstract
Flavodiiron proteins (FDPs) constitute a group of modular enzymes widespread in Bacteria, Archaea and Eukarya. Synechocystis sp. PCC 6803 has four FDPs (Flv1-4), which are essential for the photoprotection of photosynthesis. A direct comparison of light-induced O2 reduction (Mehler-like reaction) under high (3% CO2, HC) and low (air level CO2, LC) inorganic carbon conditions demonstrated that the Flv1/Flv3 heterodimer is solely responsible for an efficient steady-state O2 photoreduction under HC, with flv2 and flv4 expression strongly down-regulated. Conversely, under LC conditions, Flv1/Flv3 acts only as a transient electron sink, due to the competing withdrawal of electrons by the highly induced NDH-1 complex. Further, in vivo evidence is provided indicating that Flv2/Flv4 contributes to the Mehler-like reaction when naturally expressed under LC conditions, or, when artificially overexpressed under HC. The O2 photoreduction driven by Flv2/Flv4 occurs down-stream of PSI in a coordinated manner with Flv1/Flv3 and supports slow and steady-state O2 photoreduction.
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Affiliation(s)
| | - Daniel Solymosi
- Molecular Plant Biology, Department of BiochemistryUniversity of TurkuTurkuFinland
| | - Henna Mustila
- Molecular Plant Biology, Department of BiochemistryUniversity of TurkuTurkuFinland
| | - Luca Bersanini
- Molecular Plant Biology, Department of BiochemistryUniversity of TurkuTurkuFinland
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of BiochemistryUniversity of TurkuTurkuFinland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of BiochemistryUniversity of TurkuTurkuFinland
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26
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Volgusheva A, Kosourov S, Lynch F, Allahverdiyeva Y. Immobilized heterocysts as microbial factories for sustainable nitrogen fixation. J Biotechnol 2019; 306S:100016. [DOI: 10.1016/j.btecx.2020.100016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 02/14/2020] [Accepted: 02/21/2020] [Indexed: 12/22/2022]
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27
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Jokel M, Nagy V, Tóth SZ, Kosourov S, Allahverdiyeva Y. Elimination of the flavodiiron electron sink facilitates long-term H 2 photoproduction in green algae. Biotechnol Biofuels 2019; 12:280. [PMID: 31827608 PMCID: PMC6894204 DOI: 10.1186/s13068-019-1618-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/23/2019] [Indexed: 05/14/2023]
Abstract
BACKGROUND The development of renewable and sustainable biofuels to cover the future energy demand is one of the most challenging issues of our time. Biohydrogen, produced by photosynthetic microorganisms, has the potential to become a green biofuel and energy carrier for the future sustainable world, since it provides energy without CO2 emission. The recent development of two alternative protocols to induce hydrogen photoproduction in green algae enables the function of the O2-sensitive [FeFe]-hydrogenases, located at the acceptor side of photosystem I, to produce H2 for several days. These protocols prevent carbon fixation and redirect electrons toward H2 production. In the present work, we employed these protocols to a knockout Chlamydomonas reinhardtii mutant lacking flavodiiron proteins (FDPs), thus removing another possible electron competitor with H2 production. RESULTS The deletion of the FDP electron sink resulted in the enhancement of H2 photoproduction relative to wild-type C. reinhardtii. Additionally, the lack of FDPs leads to a more effective obstruction of carbon fixation even under elongated light pulses. CONCLUSIONS We demonstrated that the rather simple adjustment of cultivation conditions together with genetic manipulation of alternative electron pathways of photosynthesis results in efficient re-routing of electrons toward H2 photoproduction. Furthermore, the introduction of a short recovery phase by regular switching from H2 photoproduction to biomass accumulation phase allows to maintain cell fitness and use photosynthetic cells as long-term H2-producing biocatalysts.
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Affiliation(s)
- Martina Jokel
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Valéria Nagy
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Szilvia Z. Tóth
- Institute of Plant Biology, Biological Research Centre, Szeged, Temesvári krt. 62, Szeged, 6726 Hungary
| | - Sergey Kosourov
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
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28
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Jokel M, Johnson X, Peltier G, Aro EM, Allahverdiyeva Y. Hunting the main player enabling Chlamydomonas reinhardtii growth under fluctuating light. Plant J 2018; 94:822-835. [PMID: 29575329 DOI: 10.1111/tpj.13897] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 02/28/2018] [Accepted: 03/02/2018] [Indexed: 05/19/2023]
Abstract
Photosynthetic organisms have evolved numerous photoprotective mechanisms and alternative electron sinks/pathways to fine-tune the photosynthetic apparatus under dynamic environmental conditions, such as varying carbon supply or fluctuations in light intensity. In cyanobacteria flavodiiron proteins (FDPs) protect the photosynthetic apparatus from photodamage under fluctuating light (FL). In Arabidopsis thaliana, which does not possess FDPs, the PGR5-related pathway enables FL photoprotection. The direct comparison of the pgr5, pgrl1 and flv knockout mutants of Chlamydomonas reinhardtii grown under ambient air demonstrates that all three proteins contribute to the survival of cells under FL, but to varying extents. The FDPs are crucial in providing a rapid electron sink, with flv mutant lines unable to survive even mild FL conditions. In contrast, the PGRL1 and PGR5-related pathways operate over relatively slower and longer time-scales. Whilst deletion of PGR5 inhibits growth under mild FL, the pgrl1 mutant line is only impacted under severe FL conditions. This suggests distinct roles, yet a close relationship, between the function of PGR5, PGRL1 and FDP proteins in photoprotection.
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Affiliation(s)
- Martina Jokel
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
| | - Xenie Johnson
- Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA, CNRS, Aix-Marseille Université, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint-Paul-lez-Durance, F-13108, France
| | - Gilles Peltier
- Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA, CNRS, Aix-Marseille Université, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, Saint-Paul-lez-Durance, F-13108, France
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
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29
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Kosourov SN, He M, Allahverdiyeva Y, Seibert M. CHAPTER 15. Immobilization of Microalgae as a Tool for Efficient Light Utilization in H2 Production and Other Biotechnology Applications. Microalgal Hydrogen Production 2018. [DOI: 10.1039/9781849737128-00355] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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30
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Jämsä M, Lynch F, Santana-Sánchez A, Laaksonen P, Zaitsev G, Solovchenko A, Allahverdiyeva Y. Nutrient removal and biodiesel feedstock potential of green alga UHCC00027 grown in municipal wastewater under Nordic conditions. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.06.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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31
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Volgusheva AA, Jokel M, Allahverdiyeva Y, Kukarskikh GP, Lukashev EP, Lambreva MD, Krendeleva TE, Antal TK. Comparative analyses of H 2 photoproduction in magnesium- and sulfur-starved Chlamydomonas reinhardtii cultures. Physiol Plant 2017; 161:124-137. [PMID: 28386962 DOI: 10.1111/ppl.12576] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 02/09/2017] [Accepted: 02/27/2017] [Indexed: 05/27/2023]
Abstract
Magnesium (Mg)-deprived Chlamydomonas reinhardtii cells are capable to sustain hydrogen (H2 ) photoproduction at relatively high photosystem II (PSII) activity levels for an extended time period as compared with sulfur (S)-deprived cells. Herein, we present a comparative study of H2 photoproduction induced by Mg and S shortage to unravel the specific rearrangements of the photosynthetic machinery and cell metabolism occurring under the two deprivation protocols. The exhaustive analysis of photosynthetic activity and regulatory pathways, respiration and starch metabolism revealed the specific rearrangements of the photosynthetic machinery and cellular metabolism, which occur under the two deprivation conditions. The obtained results allowed us to conclude that the expanded time period of H2 production upon Mg-deprivation is due to the less harmful effects that Mg-depletion has on viability and metabolic performance of the cells. Unlike S-deprivation, the photosynthetic light and dark reactions in Mg-deprived cells remained active over the whole H2 production period. However, the elevated PSII activity in Mg-deprived cells was counteracted by the operation of pathways for O2 consumption that maintain anaerobic conditions in the presence of active water splitting.
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Affiliation(s)
- Alena A Volgusheva
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Martina Jokel
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
| | - Galina P Kukarskikh
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Eugeni P Lukashev
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Maya D Lambreva
- Institute of Crystallography, National Research Council of Italy, Rome, Italy
| | - Tatayana E Krendeleva
- 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
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32
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Huokko T, Muth-Pawlak D, Battchikova N, Allahverdiyeva Y, Aro EM. Role of Type 2 NAD(P)H Dehydrogenase NdbC in Redox Regulation of Carbon Allocation in Synechocystis. Plant Physiol 2017; 174:1863-1880. [PMID: 28533358 PMCID: PMC5490909 DOI: 10.1104/pp.17.00398] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/19/2017] [Indexed: 05/21/2023]
Abstract
NAD(P)H dehydrogenases comprise type 1 (NDH-1) and type 2 (NDH-2s) enzymes. Even though the NDH-1 complex is a well-characterized protein complex in the thylakoid membrane of Synechocystis sp. PCC 6803 (hereafter Synechocystis), the exact roles of different NDH-2s remain poorly understood. To elucidate this question, we studied the function of NdbC, one of the three NDH-2s in Synechocystis, by constructing a deletion mutant (ΔndbC) for a corresponding protein and submitting the mutant to physiological and biochemical characterization as well as to comprehensive proteomics analysis. We demonstrate that the deletion of NdbC, localized to the plasma membrane, affects several metabolic pathways in Synechocystis in autotrophic growth conditions without prominent effects on photosynthesis. Foremost, the deletion of NdbC leads, directly or indirectly, to compromised sugar catabolism, to glycogen accumulation, and to distorted cell division. Deficiencies in several sugar catabolic routes were supported by severe retardation of growth of the ΔndbC mutant under light-activated heterotrophic growth conditions but not under mixotrophy. Thus, NdbC has a significant function in regulating carbon allocation between storage and the biosynthesis pathways. In addition, the deletion of NdbC increases the amount of cyclic electron transfer, possibly via the NDH-12 complex, and decreases the expression of several transporters in ambient CO2 growth conditions.
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Affiliation(s)
- Tuomas Huokko
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Dorota Muth-Pawlak
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Natalia Battchikova
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
| | - Eva-Mari Aro
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland
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33
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Georg J, Kostova G, Vuorijoki L, Schön V, Kadowaki T, Huokko T, Baumgartner D, Müller M, Klähn S, Allahverdiyeva Y, Hihara Y, Futschik ME, Aro EM, Hess WR. Acclimation of Oxygenic Photosynthesis to Iron Starvation Is Controlled by the sRNA IsaR1. Curr Biol 2017; 27:1425-1436.e7. [PMID: 28479323 DOI: 10.1016/j.cub.2017.04.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/06/2017] [Accepted: 04/10/2017] [Indexed: 01/01/2023]
Abstract
Oxygenic photosynthesis crucially depends on proteins that possess Fe2+ or Fe/S complexes as co-factors or prosthetic groups. Here, we show that the small regulatory RNA (sRNA) IsaR1 (Iron-Stress-Activated RNA 1) plays a pivotal role in acclimation to low-iron conditions. The IsaR1 regulon consists of more than 15 direct targets, including Fe2+-containing proteins involved in photosynthetic electron transfer, detoxification of anion radicals, citrate cycle, and tetrapyrrole biogenesis. IsaR1 is essential for maintaining physiological levels of Fe/S cluster biogenesis proteins during iron deprivation. Consequently, IsaR1 affects the acclimation of the photosynthetic apparatus to iron starvation at three levels: (1) directly, via posttranscriptional repression of gene expression; (2) indirectly, via suppression of pigment; and (3) Fe/S cluster biosynthesis. Homologs of IsaR1 are widely conserved throughout the cyanobacterial phylum. We conclude that IsaR1 is a critically important riboregulator. These findings provide a new perspective for understanding the regulation of iron homeostasis in photosynthetic organisms.
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Affiliation(s)
- Jens Georg
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
| | - Gergana Kostova
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
| | - Linda Vuorijoki
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Verena Schön
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
| | - Taro Kadowaki
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Tuomas Huokko
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Desirée Baumgartner
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
| | - Maximilian Müller
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
| | - Stephan Klähn
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Yukako Hihara
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Matthias E Futschik
- CCMAR - Center of Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal; School of Biomedical and Healthcare Sciences, Plymouth University, Plymouth, Devon PL4 8AA, UK
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland
| | - Wolfgang R Hess
- Genetics & Experimental Bioinformatics, Institute of Biology III, Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany.
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Ilík P, Pavlovič A, Kouřil R, Alboresi A, Morosinotto T, Allahverdiyeva Y, Aro EM, Yamamoto H, Shikanai T. Alternative electron transport mediated by flavodiiron proteins is operational in organisms from cyanobacteria up to gymnosperms. New Phytol 2017; 214:967-972. [PMID: 28304077 DOI: 10.1111/nph.14536] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 02/28/2017] [Indexed: 05/09/2023]
Abstract
Photo-reduction of O2 to water mediated by flavodiiron proteins (FDPs) represents a safety valve for the photosynthetic electron transport chain in fluctuating light. So far, the FDP-mediated O2 photo-reduction has been evidenced only in cyanobacteria and the moss Physcomitrella; however, a recent phylogenetic analysis of transcriptomes of photosynthetic organisms has also revealed the presence of FDP genes in several nonflowering plant groups. What remains to be clarified is whether the FDP-dependent O2 photo-reduction is actually operational in these organisms. We have established a simple method for the monitoring of FDP-mediated O2 photo-reduction, based on the measurement of redox kinetics of P700 (the electron donor of photosystem I) upon dark-to-light transition. The O2 photo-reduction is manifested as a fast re-oxidation of P700. The validity of the method was verified by experiments with transgenic organisms, namely FDP knock-out mutants of Synechocystis and Physcomitrella and transgenic Arabidopsis plants expressing FDPs from Physcomitrella. We observed the fast P700 re-oxidation in representatives of all green plant groups excluding angiosperms. Our results provide strong evidence that the FDP-mediated O2 photo-reduction is functional in all nonflowering green plant groups. This finding suggests a major change in the strategy of photosynthetic regulation during the evolution of angiosperms.
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Affiliation(s)
- Petr Ilík
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University, 783 71, Olomouc, Czech Republic
| | - Andrej Pavlovič
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University, 783 71, Olomouc, Czech Republic
| | - Roman Kouřil
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University, 783 71, Olomouc, Czech Republic
| | | | | | - Yagut Allahverdiyeva
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20014, Turku, Finland
| | - Eva-Mari Aro
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20014, Turku, Finland
| | - Hiroshi Yamamoto
- Department of Botany, Graduate School of Science, Kyoto University, 606-8502, Kyoto, Japan
- CREST, Japan Science and Technology Agency, Chiyoda-ku, 102-0076, Tokyo, Japan
| | - Toshiharu Shikanai
- Department of Botany, Graduate School of Science, Kyoto University, 606-8502, Kyoto, Japan
- CREST, Japan Science and Technology Agency, Chiyoda-ku, 102-0076, Tokyo, Japan
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Bersanini L, Allahverdiyeva Y, Battchikova N, Heinz S, Lespinasse M, Ruohisto E, Mustila H, Nickelsen J, Vass I, Aro EM. Dissecting the Photoprotective Mechanism Encoded by the flv4-2 Operon: a Distinct Contribution of Sll0218 in Photosystem II Stabilization. Plant Cell Environ 2017; 40:378-389. [PMID: 27928824 DOI: 10.1111/pce.12872] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/17/2016] [Accepted: 11/20/2016] [Indexed: 06/06/2023]
Abstract
In Synechocystis sp. PCC 6803, the flv4-2 operon encodes the flavodiiron proteins Flv2 and Flv4 together with a small protein, Sll0218, providing photoprotection for Photosystem II (PSII). Here, the distinct roles of Flv2/Flv4 and Sll0218 were addressed, using a number of flv4-2 operon mutants. In the ∆sll0218 mutant, the presence of Flv2/Flv4 rescued PSII functionality as compared with ∆sll0218-flv2, where neither Sll0218 nor the Flv2/Flv4 heterodimer are expressed. Nevertheless, both the ∆sll0218 and ∆sll0218-flv2 mutants demonstrated deficiency in accumulation of PSII proteins suggesting a role for Sll0218 in PSII stabilization, which was further supported by photoinhibition experiments. Moreover, the accumulation of PSII assembly intermediates occurred in Sll0218-lacking mutants. The YFP-tagged Sll0218 protein localized in a few spots per cell at the external side of the thylakoid membrane, and biochemical membrane fractionation revealed clear enrichment of Sll0218 in the PratA-defined membranes, where the early biogenesis steps of PSII occur. Further, the characteristic antenna uncoupling feature of the ∆flv4-2 operon mutants is shown to be related to PSII destabilization in the absence of Sll0218. It is concluded that the Flv2/Flv4 heterodimer supports PSII functionality, while the Sll0218 protein assists PSII assembly and stabilization, including optimization of light harvesting.
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Affiliation(s)
- Luca Bersanini
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Yagut Allahverdiyeva
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Natalia Battchikova
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Steffen Heinz
- Molecular Plant Sciences, Ludwig-Maximillians-Universität München, Biozentrum, Grosshaderner Straße 2-4, 82152, Planegg-Martinsried, Germany
| | - Maija Lespinasse
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Essi Ruohisto
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Henna Mustila
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Jörg Nickelsen
- Molecular Plant Sciences, Ludwig-Maximillians-Universität München, Biozentrum, Grosshaderner Straße 2-4, 82152, Planegg-Martinsried, Germany
| | - Imre Vass
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, P.O. Box 521, H-6701, Szeged, Hungary
| | - Eva-Mari Aro
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
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Alirzayeva E, Neumann G, Horst W, Allahverdiyeva Y, Specht A, Alizade V. Multiple mechanisms of heavy metal tolerance are differentially expressed in ecotypes of Artemisia fragrans. Environ Pollut 2017; 220:1024-1035. [PMID: 27890587 DOI: 10.1016/j.envpol.2016.11.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 10/31/2016] [Accepted: 11/14/2016] [Indexed: 06/06/2023]
Abstract
Artemisia fragrans is a plant species with ability of growing on heavy metal-polluted soils. Ecotypes of this species naturally growing in polluted areas can accumulate and tolerate different amounts of heavy metals (HM), depending on soil contamination level at their origin. Heavy metal tolerance of various ecotypes collected from contaminated (AP, SP) and non-contaminated (BG) sites was compared by cultivation on a highly HM-contaminated river sediment and a non-contaminated agricultural control soil. Tissue-specific HM distribution was analyzed by laser ablation-inductively-coupled plasma-mass spectroscopy (LA-ICP-MS) and photosynthetic activity by non-invasive monitoring of chlorophyll fluorescence. Plant-mineral analysis did not reveal ecotype-differences in concentrations of Cd, Zn, Cu in shoots of Artemisia plants, suggesting no differential expression of root uptake or root to shoot translocation of HM. There was also no detectable rhizosphere effect on HM concentrations on the contaminated soil. However, despite high soil contaminations, all ecotypes accumulated Zn only in the concentration range of generally reported for normal growth of plants, while Cu and Cd concentrations were close to or even higher than the toxicity level for most plants. As a visible symptom of differences in HM tolerance, only the AP ecotype was able to enter the generative phase to complete its life cycle. Analysis of tissue-specific metal distribution revealed significantly lower concentrations of Cd in the leaf mesophyll of this ecotype, accumulating Cd mainly in the leaf petioles. A similar mesophyll exclusion was detectable also for Cu, although not associated with preferential accumulation in the leaf petioles. However, high mesophyll concentrations of Cd and Cu in the SP and BG ecotypes were associated with disturbances of the photosynthetic activity. The findings demonstrate differential expression of HM exclusion strategies in Artemisia ecotypes and suggest Cd and Cu exclusion from the photosynthetically active tissues as a major tolerance mechanism of the AP ecotype.
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Affiliation(s)
- Esmira Alirzayeva
- Institute of Botany of Azerbaijan National Academy of Sciences, Badamdar Highway, 40, AZ1004, Baku, Azerbaijan.
| | - Gunter Neumann
- Institute of Crop Science (340h), University of Hohenheim, Fruwirthstr., 20, D-70599, Stuttgart, Germany.
| | - Walter Horst
- Institute for Plant Nutrition, Leibniz University of Hannover, Herrenhaeuser Str. 2, 30419, Hannover, Germany.
| | | | - Andre Specht
- Institute for Plant Nutrition, Leibniz University of Hannover, Herrenhaeuser Str. 2, 30419, Hannover, Germany.
| | - Valida Alizade
- Institute of Botany of Azerbaijan National Academy of Sciences, Badamdar Highway, 40, AZ1004, Baku, Azerbaijan.
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Kosourov S, Murukesan G, Jokela J, Allahverdiyeva Y. Carotenoid Biosynthesis in Calothrix sp. 336/3: Composition of Carotenoids on Full Medium, During Diazotrophic Growth and After Long-Term H2 Photoproduction. Plant Cell Physiol 2016; 57:2269-2282. [PMID: 27519311 DOI: 10.1093/pcp/pcw143] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 08/06/2016] [Indexed: 06/06/2023]
Abstract
The carotenoid composition of the filamentous heterocystous N2-fixing cyanobacterium Calothrix sp. 336/3 was investigated under three conditions: in full medium (non-diazotrophic growth); in the absence of combined nitrogen (diazotrophic growth); and after long-term H2 photoproduction (diazotrophic medium and absence of nitrogen in the atmosphere). Anabaena sp. PCC 7120 and its ΔhupL mutant with disrupted uptake hydrogenase were used as reference strains. Analysis of identified carotenoids and enzymes involved in carotenogenesis showed the presence of three distinct biosynthetic pathways in Calothrix sp. 336/3. The first one is directed towards biosynthesis of myxoxanthophylls, such as myxol 2'-methylpentoside and 2-hydroxymyxol 2'-methylpentoside. The second pathway results in production of hydroxylated carotenoids, such as zeaxanthin, caloxanthin and nostoxanthin, and the last pathway is responsible for biosynthesis of echinenone and hydroxylated forms of ketocarotenoids, such as 3'-hydroxyechinenone and adonixanthin. We found that carotenogenesis in filamentous heterocystous cyanobacteria varies depending on the nitrogen status of the cultures, with significant accumulation of echinenone during diazotrophic growth at the expense of β-carotene. Under the severe N deficiency and high CO2 supply, which leads to efficient H2 photoproduction, cyanobacteria degrade echinenone and β-carotene, and accumulate glycosylated and hydroxylated carotenoids, such as myxol (or ketomyxol) 2'-methylpentosides, 3'-hydroxyechinenone and zeaxanthin. We suggest that the stability of the photosynthetic apparatus in Calothrix sp. 336/3 cells under N deficiency and high carbon conditions, which also appeared as the partial recovery of the pigment composition by the end of the long-term (∼1 month) H2 photoproduction process, might be mediated by a high content of hydroxycarotenoids.
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Affiliation(s)
- Sergey Kosourov
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Gayathri Murukesan
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Jouni Jokela
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
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Mustila H, Paananen P, Battchikova N, Santana-Sánchez A, Muth-Pawlak D, Hagemann M, Aro EM, Allahverdiyeva Y. The Flavodiiron Protein Flv3 Functions as a Homo-Oligomer During Stress Acclimation and is Distinct from the Flv1/Flv3 Hetero-Oligomer Specific to the O2 Photoreduction Pathway. Plant Cell Physiol 2016; 57:1468-1483. [PMID: 26936793 PMCID: PMC4937785 DOI: 10.1093/pcp/pcw047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 02/23/2016] [Indexed: 05/06/2023]
Abstract
The flavodiiron proteins (FDPs) Flv1 and Flv3 in cyanobacteria function in photoreduction of O2 to H2O, without concomitant formation of reactive oxygen species, known as the Mehler-like reaction. Both Flv1 and Flv3 are essential for growth under fluctuating light (FL) intensities, providing protection for PSI. Here we compared the global transcript profiles of the wild type (WT), Δflv1 and Δflv1/Δflv3 grown under constant light (GL) and FL. In the WT, FL induced the largest down-regulation in transcripts involved in carbon-concentrating mechanisms (CCMs), while those of the nitrogen assimilation pathways increased as compared with GL. Already under GL the Δflv1/Δflv3 double mutant demonstrated a partial down-regulation of transcripts for CCM and nitrogen metabolism, while in FL conditions the transcripts for nitrogen assimilation were strongly down-regulated. Many alterations were specific only for Δflv1/Δflv3, and not detected in Δflv1, suggesting that certain transcripts are affected primarily because of the lack of flv3 By constructing the strains overproducing solely either Flv1 or Flv3, we demonstrate that the homo-oligomers of these proteins also function in acclimation of cells to FL, by catalyzing reactions with as yet unidentified components, while the presence of both Flv1 and Flv3 is a prerequisite for the Mehler-like reaction and thus the electron transfer to O2 Considering the low expression of flv1, it is unlikely that the Flv1 homo-oligomer is present in the WT.
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Affiliation(s)
- Henna Mustila
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Pasi Paananen
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Natalia Battchikova
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Anita Santana-Sánchez
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Dorota Muth-Pawlak
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Martin Hagemann
- Institut Biowissenschaften, Pflanzenphysiologie, Universität Rostock, Albert-Einstein-Str. 3, D-18059 Rostock, Germany
| | - Eva-Mari Aro
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
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Järvi S, Suorsa M, Tadini L, Ivanauskaite A, Rantala S, Allahverdiyeva Y, Leister D, Aro EM. Thylakoid-Bound FtsH Proteins Facilitate Proper Biosynthesis of Photosystem I. Plant Physiol 2016; 171:1333-43. [PMID: 27208291 PMCID: PMC4902603 DOI: 10.1104/pp.16.00200] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 04/29/2016] [Indexed: 05/23/2023]
Abstract
Thylakoid membrane-bound FtsH proteases have a well-characterized role in degradation of the photosystem II (PSII) reaction center protein D1 upon repair of photodamaged PSII. Here, we show that the Arabidopsis (Arabidopsis thaliana) var1 and var2 mutants, devoid of the FtsH5 and FtsH2 proteins, respectively, are capable of normal D1 protein turnover under moderate growth light intensity. Instead, they both demonstrate a significant scarcity of PSI complexes. It is further shown that the reduced level of PSI does not result from accelerated photodamage of the PSI centers in var1 or var2 under moderate growth light intensity. On the contrary, radiolabeling experiments revealed impaired synthesis of the PsaA/B reaction center proteins of PSI, which was accompanied by the accumulation of PSI-specific assembly factors. psaA/B transcript accumulation and translation initiation, however, occurred in var1 and var2 mutants as in wild-type Arabidopsis, suggesting problems in later stages of PsaA/B protein expression in the two var mutants. Presumably, the thylakoid membrane-bound FtsH5 and FtsH2 have dual functions in the maintenance of photosynthetic complexes. In addition to their function as a protease in the degradation of the photodamaged D1 protein, they also are required, either directly or indirectly, for early assembly of the PSI complexes.
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Affiliation(s)
- Sari Järvi
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Marjaana Suorsa
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Luca Tadini
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Aiste Ivanauskaite
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Sanna Rantala
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Dario Leister
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20520 Turku, Finland (S.J., M.S., A.I., S.R., Y.A., E.-M.A.); andPlant Molecular Biology (Botany), Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany (L.T., D.L.)
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40
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Ermakova M, Huokko T, Richaud P, Bersanini L, Howe CJ, Lea-Smith DJ, Peltier G, Allahverdiyeva Y. Distinguishing the Roles of Thylakoid Respiratory Terminal Oxidases in the Cyanobacterium Synechocystis sp. PCC 6803. Plant Physiol 2016; 171:1307-19. [PMID: 27208274 PMCID: PMC4902628 DOI: 10.1104/pp.16.00479] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 04/11/2016] [Indexed: 05/03/2023]
Abstract
Various oxygen-utilizing electron sinks, including the soluble flavodiiron proteins (Flv1/3), and the membrane-localized respiratory terminal oxidases (RTOs), cytochrome c oxidase (Cox) and cytochrome bd quinol oxidase (Cyd), are present in the photosynthetic electron transfer chain of Synechocystis sp. PCC 6803. However, the role of individual RTOs and their relative importance compared with other electron sinks are poorly understood, particularly under light. Via membrane inlet mass spectrometry gas exchange, chlorophyll a fluorescence, P700 analysis, and inhibitor treatment of the wild type and various mutants deficient in RTOs, Flv1/3, and photosystem I, we investigated the contribution of these complexes to the alleviation of excess electrons in the photosynthetic chain. To our knowledge, for the first time, we demonstrated the activity of Cyd in oxygen uptake under light, although it was detected only upon inhibition of electron transfer at the cytochrome b6f site and in ∆flv1/3 under fluctuating light conditions, where linear electron transfer was drastically inhibited due to impaired photosystem I activity. Cox is mostly responsible for dark respiration and competes with P700 for electrons under high light. Only the ∆cox/cyd double mutant, but not single mutants, demonstrated a highly reduced plastoquinone pool in darkness and impaired gross oxygen evolution under light, indicating that thylakoid-based RTOs are able to compensate partially for each other. Thus, both electron sinks contribute to the alleviation of excess electrons under illumination: RTOs continue to function under light, operating on slower time ranges and on a limited scale, whereas Flv1/3 responds rapidly as a light-induced component and has greater capacity.
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Affiliation(s)
- Maria Ermakova
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - Tuomas Huokko
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - Pierre Richaud
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - Luca Bersanini
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - Christopher J Howe
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - David J Lea-Smith
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - Gilles Peltier
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku FI-20014, Finland (M.E., T.H., L.B., Y.A.);Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Centre National de la Recherche Scientifique, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13108 Saint-Paul-lez-Durance, France (P.R., G.P.);Aix Marseille Université, Biologie Végétale et Microbiologie Environnementales, Unité Mixte de Recherche 7265, F-13284 Marseille, France (P.R., G.P.); andDepartment of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (C.J.H., D.J.L.-S.)
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Allahverdiyeva Y, Battchikova N, Brosché M, Fujii H, Kangasjärvi S, Mulo P, Mähönen AP, Nieminen K, Overmyer K, Salojärvi J, Wrzaczek M. Integration of photosynthesis, development and stress as an opportunity for plant biology. New Phytol 2015; 208:647-55. [PMID: 26174112 DOI: 10.1111/nph.13549] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
With the tremendous progress of the past decades, molecular plant science is becoming more unified than ever. We now have the exciting opportunity to further connect subdisciplines and understand plants as whole organisms, as will be required to efficiently utilize them in natural and agricultural systems to meet human needs. The subfields of photosynthesis, plant developmental biology and plant stress are used as examples to discuss how plant science can become better integrated. The challenges, strategies and rich opportunities for the integration of the plant sciences are discussed. In recent years, more and more overlap between various subdisciplines has been inadvertently discovered including tradeoffs that may occur in plants engineered for biotechnological applications. Already important, bioinformatics and computational modelling will become even more central to structuring and understanding the ever growing amounts of data. The process of integrating and overlapping fields in plant biology research is advancing, but plant science will benefit from dedicating more effort and urgency to reach across its boundaries.
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Affiliation(s)
- Yagut Allahverdiyeva
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Natalia Battchikova
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Mikael Brosché
- Department of Biosciences, Plant Biology, and Viikki Plant Science Centre (ViPS), University of Helsinki, FI-00014, Helsinki, Finland
- Institute of Technology, University of Tartu, EE-50411, Tartu, Estonia
| | - Hiroaki Fujii
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Saijaliisa Kangasjärvi
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Paula Mulo
- Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014, Turku, Finland
| | - Ari Pekka Mähönen
- Department of Biosciences, Plant Biology, and Viikki Plant Science Centre (ViPS), University of Helsinki, FI-00014, Helsinki, Finland
- Institute of Biotechnology, University of Helsinki, FI-00014, Helsinki, Finland
| | - Kaisa Nieminen
- Department of Biosciences, Plant Biology, and Viikki Plant Science Centre (ViPS), University of Helsinki, FI-00014, Helsinki, Finland
- Institute of Biotechnology, University of Helsinki, FI-00014, Helsinki, Finland
- Natural Resources Institute Finland (Luke), Green Technology, FI-01301, Vantaa, Finland
| | - Kirk Overmyer
- Department of Biosciences, Plant Biology, and Viikki Plant Science Centre (ViPS), University of Helsinki, FI-00014, Helsinki, Finland
| | - Jarkko Salojärvi
- Department of Biosciences, Plant Biology, and Viikki Plant Science Centre (ViPS), University of Helsinki, FI-00014, Helsinki, Finland
| | - Michael Wrzaczek
- Department of Biosciences, Plant Biology, and Viikki Plant Science Centre (ViPS), University of Helsinki, FI-00014, Helsinki, Finland
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Lynch F, Santana-Sánchez A, Jämsä M, Sivonen K, Aro EM, Allahverdiyeva Y. Screening native isolates of cyanobacteria and a green alga for integrated wastewater treatment, biomass accumulation and neutral lipid production. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.05.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jokel M, Kosourov S, Battchikova N, Tsygankov AA, Aro EM, Allahverdiyeva Y. Chlamydomonas Flavodiiron Proteins Facilitate Acclimation to Anoxia During Sulfur Deprivation. Plant Cell Physiol 2015; 56:1598-607. [PMID: 26063391 PMCID: PMC4523385 DOI: 10.1093/pcp/pcv085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/02/2015] [Indexed: 05/04/2023]
Abstract
The flavodiiron proteins (FDPs) are involved in the detoxification of oxidative compounds, such as nitric oxide (NO) or O(2) in Archaea and Bacteria. In cyanobacteria, the FDPs Flv1 and Flv3 are essential in the light-dependent reduction of O(2) downstream of PSI. Phylogenetic analysis revealed that two genes (flvA and flvB) in the genome of Chlamydomonas reinhardtii show high homology to flv1 and flv3 genes of the cyanobacterium Synechocystis sp. PCC 6803. The physiological role of these FDPs in eukaryotic green algae is not known, but it is of a special interest since these phototrophic organisms perform oxygenic photosynthesis similar to higher plants, which do not possess FDP homologs. We have analyzed the levels of flvA and flvB transcripts in C. reinhardtii cells under various environmental conditions and showed that these genes are highly expressed under ambient CO(2) levels and during the early phase of acclimation to sulfur deprivation, just before the onset of anaerobiosis and the induction of efficient H(2) photoproduction. Importantly, the increase in transcript levels of the flvA and flvB genes was also corroborated by protein levels. These results strongly suggest the involvement of FLVA and FLVB proteins in alternative electron transport.
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Affiliation(s)
- Martina Jokel
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Sergey Kosourov
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland Institute of Basic Biological Problems, RAS, Pushchino, 142290 Russia
| | - Natalia Battchikova
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | | | - Eva Mari Aro
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
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Abstract
Oxygenic photosynthetic organisms experience strong fluctuations in light intensity in their natural terrestrial and aquatic growth environments. Recent studies with both plants and cyanobacteria have revealed that Photosystem (PS) I is the potential target of damage upon abrupt changes in light intensity. Photosynthetic organisms have, however, developed powerful mechanisms in order to protect their photosynthetic apparatus against such potentially hazardous light conditions. Although the electron transfer chain has remained relatively unchanged in both plant chloroplasts and their cyanobacterial ancestors, the photoprotective and regulatory mechanisms of photosynthetic light reactions have experienced conspicuous evolutionary changes. In cyanobacteria, the specific flavodiiron proteins (Flv1 and Flv3) are responsible for safeguarding PSI under rapidly fluctuating light intensities, whilst the thylakoid located terminal oxidases are involved in the protection of PSII during 12h diurnal cycles involving abrupt, square-wave, changes from dark to high light. Higher plants such as Arabidopsis thaliana have evolved different protective mechanisms. In particular, the PGR5 protein controls electron flow during sudden changes in light intensity by allowing the regulation mostly via the Cytochrome b6f complex. Besides the function of PGR5, plants have also acquired other dynamic regulatory mechanisms, among them the STN7-related LHCII protein phosphorylation that is similarly responsible for protection against rapid changes in the light environment. The green alga Chlamydomonas reinhardtii, as an evolutionary intermediate between cyanobacteria and higher plants, probably possesses both protective mechanisms. In this review, evolutionarily different photoprotective mechanisms under fluctuating light conditions are described and their contributions to cyanobacterial and plant photosynthesis are discussed.
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Affiliation(s)
- Yagut Allahverdiyeva
- Molecular Plant Biology laboratory, Department of Biochemistry, University of Turku, Turku 20520, Finland
| | - Marjaana Suorsa
- Molecular Plant Biology laboratory, Department of Biochemistry, University of Turku, Turku 20520, Finland
| | - Mikko Tikkanen
- Molecular Plant Biology laboratory, Department of Biochemistry, University of Turku, Turku 20520, Finland
| | - Eva-Mari Aro
- Molecular Plant Biology laboratory, Department of Biochemistry, University of Turku, Turku 20520, Finland
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Allahverdiyeva Y, Isojärvi J, Zhang P, Aro EM. Cyanobacterial Oxygenic Photosynthesis is Protected by Flavodiiron Proteins. Life (Basel) 2015; 5:716-43. [PMID: 25761262 PMCID: PMC4390876 DOI: 10.3390/life5010716] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 02/04/2015] [Accepted: 02/25/2015] [Indexed: 12/13/2022] Open
Abstract
Flavodiiron proteins (FDPs, also called flavoproteins, Flvs) are modular enzymes widely present in Bacteria and Archaea. The evolution of cyanobacteria and oxygenic photosynthesis occurred in concert with the modulation of typical bacterial FDPs. Present cyanobacterial FDPs are composed of three domains, the β-lactamase-like, flavodoxin-like and flavin-reductase like domains. Cyanobacterial FDPs function as hetero- and homodimers and are involved in the regulation of photosynthetic electron transport. Whilst Flv2 and Flv4 proteins are limited to specific cyanobacterial species (β-cyanobacteria) and function in photoprotection of Photosystem II, Flv1 and Flv3 proteins, functioning in the "Mehler-like" reaction and safeguarding Photosystem I under fluctuating light conditions, occur in nearly all cyanobacteria and additionally in green algae, mosses and lycophytes. Filamentous cyanobacteria have additional FDPs in heterocyst cells, ensuring a microaerobic environment for the function of the nitrogenase enzyme under the light. Here, the evolution, occurrence and functional mechanisms of various FDPs in oxygenic photosynthetic organisms are discussed.
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Affiliation(s)
- Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland.
| | - Janne Isojärvi
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland.
| | - Pengpeng Zhang
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland.
| | - Eva-Mari Aro
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland.
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Ermakova M, Battchikova N, Richaud P, Leino H, Kosourov S, Isojärvi J, Peltier G, Flores E, Cournac L, Allahverdiyeva Y, Aro EM. Heterocyst-specific flavodiiron protein Flv3B enables oxic diazotrophic growth of the filamentous cyanobacterium Anabaena sp. PCC 7120. Proc Natl Acad Sci U S A 2014; 111:11205-10. [PMID: 25002499 PMCID: PMC4121841 DOI: 10.1073/pnas.1407327111] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Flavodiiron proteins are known to have crucial and specific roles in photoprotection of photosystems I and II in cyanobacteria. The filamentous, heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120 contains, besides the four flavodiiron proteins Flv1A, Flv2, Flv3A, and Flv4 present in vegetative cells, two heterocyst-specific flavodiiron proteins, Flv1B and Flv3B. Here, we demonstrate that Flv3B is responsible for light-induced O2 uptake in heterocysts, and that the absence of the Flv3B protein severely compromises the growth of filaments in oxic, but not in microoxic, conditions. It is further demonstrated that Flv3B-mediated photosynthetic O2 uptake has a distinct role in heterocysts which cannot be substituted by respiratory O2 uptake in the protection of nitrogenase from oxidative damage and, thus, in an efficient provision of nitrogen to filaments. In line with this conclusion, the Δflv3B strain has reduced amounts of nitrogenase NifHDK subunits and shows multiple symptoms of nitrogen deficiency in the filaments. The apparent imbalance of cytosolic redox state in Δflv3B heterocysts also has a pronounced influence on the amounts of different transcripts and proteins. Therefore, an O2-related mechanism for control of gene expression is suggested to take place in heterocysts.
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Affiliation(s)
- Maria Ermakova
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland
| | - Natalia Battchikova
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland
| | - Pierre Richaud
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France;Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales; F-13108 Saint-Paul-lez-Durance, France;Aix Marseille Université, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13284 Marseille, France; and
| | - Hannu Leino
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland
| | - Sergey Kosourov
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland
| | - Janne Isojärvi
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland
| | - Gilles Peltier
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France;Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales; F-13108 Saint-Paul-lez-Durance, France;Aix Marseille Université, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13284 Marseille, France; and
| | - Enrique Flores
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas and Universidad de Sevilla, E-41092 Seville, Spain
| | - Laurent Cournac
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, Cadarache, F-13108 Saint-Paul-lez-Durance, France;Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales; F-13108 Saint-Paul-lez-Durance, France;Aix Marseille Université, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13284 Marseille, France; and
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland;
| | - Eva-Mari Aro
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014, Turku, Finland;
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Dang KV, Plet J, Tolleter D, Jokel M, Cuiné S, Carrier P, Auroy P, Richaud P, Johnson X, Alric J, Allahverdiyeva Y, Peltier G. Combined increases in mitochondrial cooperation and oxygen photoreduction compensate for deficiency in cyclic electron flow in Chlamydomonas reinhardtii. Plant Cell 2014; 26:3036-50. [PMID: 24989042 PMCID: PMC4145130 DOI: 10.1105/tpc.114.126375] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
During oxygenic photosynthesis, metabolic reactions of CO2 fixation require more ATP than is supplied by the linear electron flow operating from photosystem II to photosystem I (PSI). Different mechanisms, such as cyclic electron flow (CEF) around PSI, have been proposed to participate in reequilibrating the ATP/NADPH balance. To determine the contribution of CEF to microalgal biomass productivity, here, we studied photosynthesis and growth performances of a knockout Chlamydomonas reinhardtii mutant (pgrl1) deficient in PROTON GRADIENT REGULATION LIKE1 (PGRL1)-mediated CEF. Steady state biomass productivity of the pgrl1 mutant, measured in photobioreactors operated as turbidostats, was similar to its wild-type progenitor under a wide range of illumination and CO2 concentrations. Several changes were observed in pgrl1, including higher sensitivity of photosynthesis to mitochondrial inhibitors, increased light-dependent O2 uptake, and increased amounts of flavodiiron (FLV) proteins. We conclude that a combination of mitochondrial cooperation and oxygen photoreduction downstream of PSI (Mehler reactions) supplies extra ATP for photosynthesis in the pgrl1 mutant, resulting in normal biomass productivity under steady state conditions. The lower biomass productivity observed in the pgrl1 mutant in fluctuating light is attributed to an inability of compensation mechanisms to respond to a rapid increase in ATP demand.
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Affiliation(s)
- Kieu-Van Dang
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Julie Plet
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Dimitri Tolleter
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Martina Jokel
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Stéphan Cuiné
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Patrick Carrier
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Pascaline Auroy
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Pierre Richaud
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Xenie Johnson
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Jean Alric
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
| | - Yagut Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Gilles Peltier
- CEA, Institut de Biologie Environnementale et de Biotechnologie, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, CEA Cadarache, F-13108 Saint-Paul-lez-Durance, France CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13108 Saint-Paul-lez-Durance, France Aix Marseille Université, UMR 7265 Biologie Végétale et Microbiologie Environnementale, F-13284 Marseille, France
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Shunmugam S, Jokela J, Wahlsten M, Battchikova N, Vass I, Karonen M, Sinkkonen J, Permi P, Sivonen K, Aro EM, Allahverdiyeva Y. Secondary metabolite from Nostoc XPORK14A inhibits photosynthesis and growth of Synechocystis PCC 6803. Plant Cell Environ 2014; 37:1371-1381. [PMID: 24895757 DOI: 10.1111/pce.12243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Screening of 55 different cyanobacterial strains revealed that an extract from Nostoc XPORK14A drastically modifies the amplitude and kinetics of chlorophyll a fluorescence induction of Synechocystis PCC6803 cells.After 2 d exposure to the Nostoc XPORK14A extract, Synechocystis PCC 6803 cells displayed reduced net photosynthetic activity and significantly modified electron transport properties of photosystem II under both light and dark conditions. However, the maximum oxidizable amount of P700 was not strongly affected. The extract also induced strong oxidative stress in Synechocystis PCC 6803 cells in both light and darkness. We identified the secondary metabolite of Nostoc XPORK14A causing these pronounced effects on Synechocystis cells. Mass spectrometry and nuclear magnetic resonance analyses revealed that this compound, designated as M22, has a non-peptide structure. We propose that M22 possesses a dualaction mechanism: firstly, by photogeneration of reactive oxygen species in the presence of light, which in turn affects the photosynthetic machinery of Synechocystis PCC 6803; and secondly, by altering the in vivo redox status of cells, possibly through inhibition of protein kinases.
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Mustila H, Allahverdiyeva Y, Isojärvi J, Aro EM, Eisenhut M. The bacterial-type [4Fe-4S] ferredoxin 7 has a regulatory function under photooxidative stress conditions in the cyanobacterium Synechocystis sp. PCC 6803. Biochim Biophys Acta 2014; 1837:1293-304. [PMID: 24780314 DOI: 10.1016/j.bbabio.2014.04.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 04/10/2014] [Accepted: 04/13/2014] [Indexed: 12/15/2022]
Abstract
Ferredoxins function as electron carrier in a wide range of metabolic and regulatory reactions. It is not clear yet, whether the multiplicity of ferredoxin proteins is also reflected in functional multiplicity in photosynthetic organisms. We addressed the biological function of the bacterial-type ferredoxin, Fed7 in the cyanobacterium Synechocystis sp. PCC 6803. The expression of fed7 is induced under low CO₂ conditions and further enhanced by additional high light treatment. These conditions are considered as promoting photooxidative stress, and prompted us to investigate the biological function of Fed7 under these conditions. Loss of Fed7 did not inhibit growth of the mutant strain Δfed7 but significantly modulated photosynthesis parameters when the mutant was grown under low CO₂ and high light conditions. Characteristics of the Δfed7 mutant included elevated chlorophyll and photosystem I levels as well as reduced abundance and activity of photosystem II. Transcriptional profiling of the mutant under low CO₂ conditions demonstrated changes in gene regulation of the carbon concentrating mechanism and photoprotective mechanisms such as the Flv2/4 electron valve, the PSII dimer stabilizing protein Sll0218, and chlorophyll biosynthesis. We conclude that the function of Fed7 is connected to coping with photooxidative stress, possibly by constituting a redox-responsive regulatory element in photoprotection. In photosynthetic eukaryotes domains homologous to Fed7 are exclusively found in chloroplast DnaJ-like proteins that are likely involved in remodeling of regulator protein complexes. It is conceivable that the regulatory function of Fed7 evolved in cyanobacteria and was recruited by Viridiplantae as the controller for the chloroplast DnaJ-like proteins.
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Affiliation(s)
- H Mustila
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland.
| | - Y Allahverdiyeva
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland.
| | - J Isojärvi
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland.
| | - E M Aro
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland.
| | - M Eisenhut
- Laboratory of Molecular Plant Biology, Department of Biochemistry, University of Turku, 20014 Turku, Finland.
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