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Rydzy M, Kolesiński P, Szczepaniak A, Grzyb J. DnaK and DnaJ proteins from Hsp70/40 family are involved in Rubisco biosynthesis in Synechocystis sp. PCC6803 and sustain the enzyme assembly in a heterologous system. BMC PLANT BIOLOGY 2023; 23:109. [PMID: 36814186 PMCID: PMC9948308 DOI: 10.1186/s12870-023-04121-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 02/14/2023] [Indexed: 06/01/2023]
Abstract
Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) catalyzes the first step of carbon fixation performed by photosynthetic organisms. Form I of this enzyme found in plants and cyanobacteria is composed of eight large (RbcL) and eight small (RbcS) subunits. To form a functional enzyme, Rubisco subunits need to be properly folded, with the assistance of cellular chaperone machinery, and consecutively assembled in a strictly orchestrated manner, with the help of multiple auxiliary factors. In recent years, multiple Rubisco assembly chaperones and their function in enzyme biogenesis have been extensively characterized. Little is known about the potential specialized factors involved in Rubisco subunits folding at the pre-chaperonin stage, yet this knowledge is greatly needed for the fast and efficient testing of new Rubisco variants.Synechococcus sp. PCC 6803 Rubisco shows limited solubility and a lack of assembly in the Escherichia coli expression system. In this study, we aim to identify which additional chaperones are necessary and sufficient in sustaining the heterologous assembly of native Rubisco. Our findings prove that upon the introduction of Synechocystis DnaK2 to the E. coli system, RbcL is produced in soluble form. The addition of specific DnaJ (Sll1384) enhances this effect. We explain these combined effects based on binding constancies, measured for particular partners in vitro, as well as our analysis of the putative tertiary structure of the proteins. Our results have potential implications for Rubisco engineering.
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Affiliation(s)
- Małgorzata Rydzy
- Department of Biophysics, Faculty of Biotechnology, University of Wrocław, F. Joliot-Curie 14a, Wrocław, Poland
| | - Piotr Kolesiński
- Department of Biophysics, Faculty of Biotechnology, University of Wrocław, F. Joliot-Curie 14a, Wrocław, Poland
| | - Andrzej Szczepaniak
- Department of Biophysics, Faculty of Biotechnology, University of Wrocław, F. Joliot-Curie 14a, Wrocław, Poland
| | - Joanna Grzyb
- Department of Biophysics, Faculty of Biotechnology, University of Wrocław, F. Joliot-Curie 14a, Wrocław, Poland.
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2
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Tang J, Zhou H, Yao D, Riaz S, You D, Klepacz-Smółka A, Daroch M. Comparative Genomic Analysis Revealed Distinct Molecular Components and Organization of CO 2-Concentrating Mechanism in Thermophilic Cyanobacteria. Front Microbiol 2022; 13:876272. [PMID: 35602029 PMCID: PMC9120777 DOI: 10.3389/fmicb.2022.876272] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/04/2022] [Indexed: 12/30/2022] Open
Abstract
Cyanobacteria evolved an inorganic carbon-concentrating mechanism (CCM) to perform effective oxygenic photosynthesis and prevent photorespiratory carbon losses. This process facilitates the acclimation of cyanobacteria to various habitats, particularly in CO2-limited environments. To date, there is limited information on the CCM of thermophilic cyanobacteria whose habitats limit the solubility of inorganic carbon. Here, genome-based approaches were used to identify the molecular components of CCM in 17 well-described thermophilic cyanobacteria. These cyanobacteria were from the genus Leptodesmis, Leptolyngbya, Leptothermofonsia, Thermoleptolyngbya, Thermostichus, and Thermosynechococcus. All the strains belong to β-cyanobacteria based on their β-carboxysome shell proteins with 1B form of Rubisco. The diversity in the Ci uptake systems and carboxysome composition of these thermophiles were analyzed based on their genomic information. For Ci uptake systems, two CO2 uptake systems (NDH-13 and NDH-14) and BicA for HCO3– transport were present in all the thermophilic cyanobacteria, while most strains did not have the Na+/HCO3– Sbt symporter and HCO3– transporter BCT1 were absent in four strains. As for carboxysome, the β-carboxysomal shell protein, ccmK2, was absent only in Thermoleptolyngbya strains, whereas ccmK3/K4 were absent in all Thermostichus and Thermosynechococcus strains. Besides, all Thermostichus and Thermosynechococcus strains lacked carboxysomal β-CA, ccaA, the carbonic anhydrase activity of which may be replaced by ccmM proteins as indicated by comparative domain analysis. The genomic distribution of CCM-related genes was different among the thermophiles, suggesting probably distinct expression regulation. Overall, the comparative genomic analysis revealed distinct molecular components and organization of CCM in thermophilic cyanobacteria. These findings provided insights into the CCM components of thermophilic cyanobacteria and fundamental knowledge for further research regarding photosynthetic improvement and biomass yield of thermophilic cyanobacteria with biotechnological potentials.
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Affiliation(s)
- Jie Tang
- School of Food and Bioengineering, Chengdu University, Chengdu, China
| | - Huizhen Zhou
- School of Food and Bioengineering, Chengdu University, Chengdu, China
| | - Dan Yao
- School of Food and Bioengineering, Chengdu University, Chengdu, China
| | - Sadaf Riaz
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Dawei You
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Anna Klepacz-Smółka
- Department of Bioprocess Engineering, Faculty of Process and Environmental Engineering, Łódź University of Technology, Łódź, Poland
| | - Maurycy Daroch
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, China
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3
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In vitro activity of reconstituted rubisco enzyme from Gloeobacter violaceus. J Biosci 2021. [DOI: 10.1007/s12038-021-00188-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Yoon YE, Cho HM, Bae DW, Lee SJ, Choe H, Kim MC, Cheong MS, Lee YB. Erythromycin Treatment of Brassica campestris Seedlings Impacts the Photosynthetic and Protein Synthesis Pathways. Life (Basel) 2020; 10:life10120311. [PMID: 33255918 PMCID: PMC7759809 DOI: 10.3390/life10120311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/20/2020] [Accepted: 11/24/2020] [Indexed: 11/16/2022] Open
Abstract
Erythromycin (Ery) is a commonly used veterinary drug that prevents infections and promotes the growth of farm animals. Ery is often detected in agricultural fields due to the effects of manure application in the ecosystem. However, there is a lack of information on Ery toxicity in crops. In this study, we performed a comparative proteomic analysis to identify the molecular mechanisms of Ery toxicity during seedling growth based on our observation of a decrease in chlorophyll (Chl) contents using Brassica campestris. A total of 452 differentially abundant proteins (DAPs) were identified including a ribulose-1,5-bisphosphate carboxylase (RuBisCO). The proteomic analysis according to gene ontology (GO) classification revealed that many of these DAPs responding to Ery treatment functioned in a cellular process and a metabolic process. The molecular function analysis showed that DAPs classified within catalytic activity were predominantly changed by Ery, including metabolite interconversion enzyme and protein modifying enzyme. An analysis of functional pathways using MapMan revealed that many photosynthesis components were downregulated, whereas many protein biosynthesis components were upregulated. A good relationship was observed between protein and transcript abundance in a photosynthetic pathway, as determined by qPCR analysis. These combined results suggest that Ery affects plant physiological activity by downregulating protein abundance in the photosynthetic pathway.
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Affiliation(s)
- Young-Eun Yoon
- Division of Applied Life Science (BK21four), Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea; (Y.-E.Y.); (H.M.C.); (H.C.); (M.C.K.)
| | - Hyun Min Cho
- Division of Applied Life Science (BK21four), Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea; (Y.-E.Y.); (H.M.C.); (H.C.); (M.C.K.)
| | - Dong-won Bae
- Center for Research Facilities, Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea;
| | - Sung Joong Lee
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea;
| | - Hyeonji Choe
- Division of Applied Life Science (BK21four), Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea; (Y.-E.Y.); (H.M.C.); (H.C.); (M.C.K.)
| | - Min Chul Kim
- Division of Applied Life Science (BK21four), Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea; (Y.-E.Y.); (H.M.C.); (H.C.); (M.C.K.)
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea;
| | - Mi Sun Cheong
- Division of Applied Life Science (BK21four), Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea; (Y.-E.Y.); (H.M.C.); (H.C.); (M.C.K.)
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea;
- Correspondence: (M.S.C.); (Y.B.L.); Tel.: +82-55-772-1967 (M.S.C. & Y.B.L.)
| | - Yong Bok Lee
- Division of Applied Life Science (BK21four), Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea; (Y.-E.Y.); (H.M.C.); (H.C.); (M.C.K.)
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju-daero 501, Jinju 52665, Korea;
- Correspondence: (M.S.C.); (Y.B.L.); Tel.: +82-55-772-1967 (M.S.C. & Y.B.L.)
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5
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Flamholz AI, Prywes N, Moran U, Davidi D, Bar-On YM, Oltrogge LM, Alves R, Savage D, Milo R. Revisiting Trade-offs between Rubisco Kinetic Parameters. Biochemistry 2019; 58:3365-3376. [PMID: 31259528 PMCID: PMC6686151 DOI: 10.1021/acs.biochem.9b00237] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
![]()
Rubisco
is the primary carboxylase of the Calvin cycle, the most
abundant enzyme in the biosphere, and one of the best-characterized
enzymes. On the basis of correlations between Rubisco kinetic parameters,
it is widely posited that constraints embedded in the catalytic mechanism
enforce trade-offs between CO2 specificity, SC/O, and maximum carboxylation rate, kcat,C. However, the reasoning that established this view
was based on data from ≈20 organisms. Here, we re-examine models
of trade-offs in Rubisco catalysis using a data set from ≈300
organisms. Correlations between kinetic parameters are substantially
attenuated in this larger data set, with the inverse relationship
between kcat,C and SC/O being a key example. Nonetheless, measured kinetic parameters
display extremely limited variation, consistent with a view of Rubisco
as a highly constrained enzyme. More than 95% of kcat,C values are between 1 and 10 s–1, and no measured kcat,C exceeds 15 s–1. Similarly, SC/O varies
by only 30% among Form I Rubiscos and <10% among C3 plant
enzymes. Limited variation in SC/O forces
a strong positive correlation between the catalytic efficiencies (kcat/KM) for carboxylation
and oxygenation, consistent with a model of Rubisco catalysis in which
increasing the rate of addition of CO2 to the enzyme–substrate
complex requires an equal increase in the O2 addition rate.
Altogether, these data suggest that Rubisco evolution is tightly constrained
by the physicochemical limits of CO2/O2 discrimination.
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Affiliation(s)
- Avi I Flamholz
- Department of Molecular and Cell Biology , University of California , Berkeley , California 94720 , United States
| | - Noam Prywes
- Innovative Genomics Institute , University of California , Berkeley , California 94704 , United States
| | - Uri Moran
- Department of Plant and Environmental Sciences , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Dan Davidi
- Department of Plant and Environmental Sciences , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Yinon M Bar-On
- Department of Plant and Environmental Sciences , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Luke M Oltrogge
- Department of Molecular and Cell Biology , University of California , Berkeley , California 94720 , United States
| | - Rui Alves
- Institute of Biomedical Research of Lleida , IRBLleida , 25198 Lleida , Catalunya , Spain.,Departament de Ciències Mèdiques Bàsiques , University of Lleida , 25198 Lleida , Catalunya , Spain
| | - David Savage
- Department of Molecular and Cell Biology , University of California , Berkeley , California 94720 , United States
| | - Ron Milo
- Department of Plant and Environmental Sciences , Weizmann Institute of Science , Rehovot 76100 , Israel
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6
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Stoichiometric Network Analysis of Cyanobacterial Acclimation to Photosynthesis-Associated Stresses Identifies Heterotrophic Niches. Processes (Basel) 2017. [DOI: 10.3390/pr5020032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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7
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Kolesinski P, Rydzy M, Szczepaniak A. Is RAF1 protein from Synechocystis sp. PCC 6803 really needed in the cyanobacterial Rubisco assembly process? PHOTOSYNTHESIS RESEARCH 2017; 132:135-148. [PMID: 28108864 PMCID: PMC5387032 DOI: 10.1007/s11120-017-0336-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 01/02/2017] [Indexed: 05/29/2023]
Abstract
Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is responsible for carbon dioxide conversion during photosynthesis and, therefore, is the most important protein in biomass generation. Modifications of this biocatalyst toward improvements in its properties are hindered by the complicated and not yet fully understood assembly process required for the formation of active holoenzymes. An entire set of auxiliary factors, including chaperonin GroEL/GroES and assembly chaperones RbcX or Rubisco accumulation factor 1 (RAF1), is involved in the folding and subsequent assembly of Rubisco subunits. Recently, it has been shown that cyanobacterial RAF1 acts during the formation of the large Rubisco subunit (RbcL) dimer. However, both its physiological function and its necessity in the prokaryotic Rubisco formation process remain elusive. Here, we demonstrate that the Synechocystis sp. PCC 6803 strain with raf1 gene disruption shows the same growth rate as wild-type cells under standard conditions. Moreover, the Rubisco biosynthesis process seems to be unperturbed in mutant cells despite the absence of RbcL-RAF1 complexes. However, in the tested environmental conditions, sulfur starvation triggers the degradation of RbcL and subsequent proteolysis of other polypeptides in wild-type but not Δraf1 strains. Pull-down experiments also indicate that, apart from Rubisco, RAF1 co-purifies with phycocyanins. We postulate that RAF1 is not an obligatory factor in cyanobacterial Rubisco assembly, but rather participates in environmentally regulated Rubisco homeostasis.
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Affiliation(s)
- Piotr Kolesinski
- Laboratory of Biophysics, Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383, Wroclaw, Poland.
| | - Malgorzata Rydzy
- Laboratory of Biophysics, Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383, Wroclaw, Poland
| | - Andrzej Szczepaniak
- Laboratory of Biophysics, Faculty of Biotechnology, University of Wroclaw, F. Joliot-Curie 14a, 50-383, Wroclaw, Poland
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8
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Photorespiration and Rate Synchronization in a Phototroph-Heterotroph Microbial Consortium. Processes (Basel) 2017. [DOI: 10.3390/pr5010011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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9
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Galmés J, Hermida-Carrera C, Laanisto L, Niinemets Ü. A compendium of temperature responses of Rubisco kinetic traits: variability among and within photosynthetic groups and impacts on photosynthesis modeling. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:5067-91. [PMID: 27406782 PMCID: PMC5014154 DOI: 10.1093/jxb/erw267] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The present study provides a synthesis of the in vitro and in vivo temperature responses of Rubisco Michaelis-Menten constants for CO2 (Kc) and O2 (Ko), specificity factor (Sc,o) and maximum carboxylase turnover rate (kcatc) for 49 species from all the main photosynthetic kingdoms of life. Novel correction routines were developed for in vitro data to remove the effects of study-to-study differences in Rubisco assays. The compilation revealed differences in the energy of activation (∆Ha) of Rubisco kinetics between higher plants and other photosynthetic groups, although photosynthetic bacteria and algae were under-represented and very few species have been investigated so far. Within plants, the variation in Rubisco temperature responses was related to species' climate and photosynthetic mechanism, with differences in ∆Ha for kcatc among C3 plants from cool and warm environments, and in ∆Ha for kcatc and Kc among C3 and C4 plants. A negative correlation was observed among ∆Ha for Sc/o and species' growth temperature for all data pooled, supporting the convergent adjustment of the temperature sensitivity of Rubisco kinetics to species' thermal history. Simulations of the influence of varying temperature dependences of Rubisco kinetics on Rubisco-limited photosynthesis suggested improved photosynthetic performance of C3 plants from cool habitats at lower temperatures, and C3 plants from warm habitats at higher temperatures, especially at higher CO2 concentration. Thus, variation in Rubisco kinetics for different groups of photosynthetic organisms might need consideration to improve prediction of photosynthesis in future climates. Comparisons between in vitro and in vivo data revealed common trends, but also highlighted a large variability among both types of Rubisco kinetics currently used to simulate photosynthesis, emphasizing the need for more experimental work to fill in the gaps in Rubisco datasets and improve scaling from enzyme kinetics to realized photosynthesis.
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Affiliation(s)
- Jeroni Galmés
- Research Group in Plant Biology under Mediterranean Conditions, Department of Biology, Universitat de les Illes Balears, Carretera de Valldemossa km 7.5, 07122 Palma, Illes Balears, Spain
| | - Carmen Hermida-Carrera
- Research Group in Plant Biology under Mediterranean Conditions, Department of Biology, Universitat de les Illes Balears, Carretera de Valldemossa km 7.5, 07122 Palma, Illes Balears, Spain
| | - Lauri Laanisto
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014, Estonia
| | - Ülo Niinemets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014, Estonia Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia
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Unlocking the Constraints of Cyanobacterial Productivity: Acclimations Enabling Ultrafast Growth. mBio 2016; 7:mBio.00949-16. [PMID: 27460798 PMCID: PMC4981716 DOI: 10.1128/mbio.00949-16] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Harnessing the metabolic potential of photosynthetic microbes for next-generation biotechnology objectives requires detailed scientific understanding of the physiological constraints and regulatory controls affecting carbon partitioning between biomass, metabolite storage pools, and bioproduct synthesis. We dissected the cellular mechanisms underlying the remarkable physiological robustness of the euryhaline unicellular cyanobacterium Synechococcus sp. strain PCC 7002 (Synechococcus 7002) and identify key mechanisms that allow cyanobacteria to achieve unprecedented photoautotrophic productivities (~2.5-h doubling time). Ultrafast growth of Synechococcus 7002 was supported by high rates of photosynthetic electron transfer and linked to significantly elevated transcription of precursor biosynthesis and protein translation machinery. Notably, no growth or photosynthesis inhibition signatures were observed under any of the tested experimental conditions. Finally, the ultrafast growth in Synechococcus 7002 was also linked to a 300% expansion of average cell volume. We hypothesize that this cellular adaptation is required at high irradiances to support higher cell division rates and reduce deleterious effects, corresponding to high light, through increased carbon and reductant sequestration. Efficient coupling between photosynthesis and productivity is central to the development of biotechnology based on solar energy. Therefore, understanding the factors constraining maximum rates of carbon processing is necessary to identify regulatory mechanisms and devise strategies to overcome productivity constraints. Here, we interrogate the molecular mechanisms that operate at a systems level to allow cyanobacteria to achieve ultrafast growth. This was done by considering growth and photosynthetic kinetics with global transcription patterns. We have delineated putative biological principles that allow unicellular cyanobacteria to achieve ultrahigh growth rates through photophysiological acclimation and effective management of cellular resource under different growth regimes.
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12
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Wiciarz M, Gubernator B, Kruk J, Niewiadomska E. Enhanced chloroplastic generation of H2O2 in stress-resistant Thellungiella salsuginea in comparison to Arabidopsis thaliana. PHYSIOLOGIA PLANTARUM 2015; 153:467-76. [PMID: 24961163 PMCID: PMC4359041 DOI: 10.1111/ppl.12248] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/23/2014] [Accepted: 05/27/2014] [Indexed: 05/08/2023]
Abstract
In order to find some basis of salinity resistance in the chloroplastic metabolism, a halophytic Thellungiella salsuginea was compared with glycophytic Arabidopsis thaliana. In control T.s. plants the increased ratios of chlorophyll a/b and of fluorescence emission at 77 K (F730 /F685 ) were documented, in comparison to A.t.. This was accompanied by a higher YII and lower NPQ (non-photochemical quenching) values, and by a more active PSI (photosystem I). Another prominent feature of the photosynthetic electron transport (PET) in T.s. was the intensive production of H2 O2 from PQ (plastoquinone) pool. Salinity treatment (0.15 and 0.30 M NaCl for A.t. and T.s., respectively) led to a decrease in ratios of chl a/b and F730 /F685 . In A.t., a salinity-driven enhancement of YII and NPQ was found, in association with the stimulation of H2 O2 production from PQ pool. In contrast, in salinity-treated T.s., these variables were similar as in controls. The intensive H2 O2 generation was accompanied by a high activity of PTOX (plastid terminal oxidase), whilst inhibition of this enzyme led to an increased H2 O2 formation. It is hypothesized, that the intensive H2 O2 generation from PQ pool might be an important element of stress preparedness in Thellungiella plants. In control T.s. plants, a higher activation state of carboxylase ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco, EC 4.1.1.39) was also documented in concert with the attachment of Rubisco activase (RCA) to the thylakoid membranes. It is supposed, that a closer contact of RCA with PSI in T.s. enables a more efficient Rubisco activation than in A.t.
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Affiliation(s)
- Monika Wiciarz
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University30-387, Kraków, Poland
| | - Beata Gubernator
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw51-148, Wrocław, Poland
| | - Jerzy Kruk
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University30-387, Kraków, Poland
| | - Ewa Niewiadomska
- Institute of Plant Physiology, Polish Academy of Sciences30-239, Kraków, Poland
- Correspondence*Corresponding author, e-mail:
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13
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Kolesinski P, Belusiak I, Czarnocki-Cieciura M, Szczepaniak A. Rubisco Accumulation Factor 1 from Thermosynechococcus elongatus participates in the final stages of ribulose-1,5-bisphosphate carboxylase/oxygenase assembly in Escherichia coli cells and in vitro. FEBS J 2014; 281:3920-32. [PMID: 25041569 DOI: 10.1111/febs.12928] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 07/06/2014] [Accepted: 07/10/2014] [Indexed: 11/27/2022]
Abstract
Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) biosynthesis is a multi-step process in which specific chaperones are involved. Recently, a novel polypeptide, Rubisco Accumulation Factor 1 (RAF1), has been identified as a protein that is necessary for proper assembly of this enzyme in maize cells (Zea mays). However, neither its specific function nor its mode of action have as yet been determined. The results presented here show that the prokaryotic homolog of RAF1 from Thermosynechococcus elongatus is expressed in cyanobacterial cells and interacts with a large Rubisco subunit (RbcL). Using a heterologous expression system, it was demonstrated that this protein promotes Rubisco assembly in Escherichia coli cells. Moreover, when co-expressed with RbcL alone, a stable RbcL-RAF1 complex is formed. Molecular mass determination for this Rubisco assembly intermediate by size-exclusion chromatography coupled with multi-angle light scattering indicates that it consists of an RbcL dimer and two RAF1 molecules. A purified RbcL-RAF1 complex dissociated upon addition of a small Rubisco subunit (RbcS), leading to formation of the active holoenzyme. Moreover, titration of the octameric (RbcL8) core of Rubisco with RAF1 results in disassembly of such a stucture and creation of an RbcL-RAF1 intermediate. The results presented here are the first attempt to elucidate the role of cyanobacterial Rubisco Accumulation Factor 1 in the Rubisco biosynthesis process.
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Affiliation(s)
- Piotr Kolesinski
- Laboratory of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
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14
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Tarnawski M, Krzywda S, Szczepaniak A, Jaskolski M. Rational 'correction' of the amino-acid sequence of RbcX protein from the thermophilic cyanobacterium Thermosynechococcus elongatus dramatically improves crystallization. Acta Crystallogr Sect F Struct Biol Cryst Commun 2008; 64:870-4. [PMID: 18765926 DOI: 10.1107/s174430910802678x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Accepted: 08/19/2008] [Indexed: 11/10/2022]
Abstract
RbcX is a dimeric protein found in cyanobacteria that assists in the assembly of the oligomeric RuBisCO complex. RbcX from the thermophile Thermosynechococcus elongatus (TeRbcX) contains an unusual Cys103 residue in its sequence and when expressed recombinantly the protein aggregates and cannot be crystallized. Site-directed mutagenesis of Cys103 to either Arg or Ala produced non-aggregating proteins that could be readily crystallized in several crystal forms. Synchrotron-radiation X-ray diffraction data were collected to 1.96 A resolution and formed the basis of crystal structure analysis of TeRbcX.
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Affiliation(s)
- Miroslaw Tarnawski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland
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