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Chojnacka A, Smoczynska A, Bielewicz D, Pacak A, Hensel G, Kumlehn J, Maciej Karlowski W, Grabsztunowicz M, Sobieszczuk-Nowicka E, Jarmolowski A, Szweykowska-Kulinska Z. PEP444c encoded within the MIR444c gene regulates microRNA444c accumulation in barley. Physiol Plant 2023; 175:e14018. [PMID: 37882256 DOI: 10.1111/ppl.14018] [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] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/15/2023] [Indexed: 10/27/2023]
Abstract
MicroRNAs are small, noncoding RNA molecules that regulate the expression of their target genes. The MIR444 gene family is present exclusively in monocotyledons, and microRNAs444 from this family have been shown to target certain MADS-box transcription factors in rice and barley. We identified three barley MIR444 (MIR444a/b/c) genes and comprehensively characterised their structure and the processing pattern of the primary transcripts (pri-miRNAs444). Pri-microRNAs444 undergo extensive alternative splicing, generating functional and nonfunctional pri-miRNA444 isoforms. We show that barley pri-miRNAs444 contain numerous open reading frames (ORFs) whose transcripts associate with ribosomes. Using specific antibodies, we provide evidence that selected ORFs encoding PEP444a within MIR444a and PEP444c within MIR444c are expressed in barley plants. Moreover, we demonstrate that CRISPR-associated endonuclease 9 (Cas9)-mediated mutagenesis of the PEP444c-encoding sequence results in a decreased level of PEP444 transcript in barley shoots and roots and a 5-fold reduced level of mature microRNA444c in roots. Our observations suggest that PEP444c encoded by the MIR444c gene is involved in microRNA444c biogenesis in barley.
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Affiliation(s)
- Aleksandra Chojnacka
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Aleksandra Smoczynska
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Dawid Bielewicz
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
- Centre for Advanced Technologies, Adam Mickiewicz University, Poznan, Poland
| | - Andrzej Pacak
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Goetz Hensel
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Seeland, Germany
| | - Jochen Kumlehn
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Seeland, Germany
| | - Wojciech Maciej Karlowski
- Department of Computational Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Magda Grabsztunowicz
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Ewa Sobieszczuk-Nowicka
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Artur Jarmolowski
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
| | - Zofia Szweykowska-Kulinska
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznan, Poland
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Stolarska E, Tanwar UK, Guan Y, Grabsztunowicz M, Arasimowicz-Jelonek M, Phanstiel O, Sobieszczuk-Nowicka E. Genetic portrait of polyamine transporters in barley: insights in the regulation of leaf senescence. Front Plant Sci 2023; 14:1194737. [PMID: 37332717 PMCID: PMC10272464 DOI: 10.3389/fpls.2023.1194737] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 05/02/2023] [Indexed: 06/20/2023]
Abstract
Nitrogen (N) is one of the most expensive nutrients to supply, therefore, improving the efficiency of N use is essential to reduce the cost of commercial fertilization in plant production. Since cells cannot store reduced N as NH3 or NH4 +, polyamines (PAs), the low molecular weight aliphatic nitrogenous bases, are important N storage compounds in plants. Manipulating polyamines may provide a method to increase nitrogen remobilization efficiency. Homeostasis of PAs is maintained by intricate multiple feedback mechanisms at the level of biosynthesis, catabolism, efflux, and uptake. The molecular characterization of the PA uptake transporter (PUT) in most crop plants remains largely unknown, and knowledge of polyamine exporters in plants is lacking. Bi-directional amino acid transporters (BATs) have been recently suggested as possible PAs exporters for Arabidopsis and rice, however, detailed characterization of these genes in crops is missing. This report describes the first systematic study to comprehensively analyze PA transporters in barley (Hordeum vulgare, Hv), specifically the PUT and BAT gene families. Here, seven PUTs (HvPUT1-7) and six BATs (HvBAT1-6) genes were identified as PA transporters in the barley genome and the detailed characterization of these HvPUT and HvBAT genes and proteins is provided. Homology modeling of all studied PA transporters provided 3D structures prediction of the proteins of interest with high accuracy. Moreover, molecular docking studies provided insights into the PA-binding pockets of HvPUTs and HvBATs facilitating improved understanding of the mechanisms and interactions involved in HvPUT/HvBAT-mediated transport of PAs. We also examined the physiochemical characteristics of PA transporters and discuss the function of PA transporters in barley development, and how they help barley respond to stress, with a particular emphasis on leaf senescence. Insights gained here could lead to improved barley production via modulation of polyamine homeostasis.
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Affiliation(s)
- Ewelina Stolarska
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Umesh Kumar Tanwar
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Yufeng Guan
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Magda Grabsztunowicz
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | | | - Otto Phanstiel
- Department of Medical Education, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Ewa Sobieszczuk-Nowicka
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
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Rudy E, Grabsztunowicz M, Arasimowicz-Jelonek M, Tanwar UK, Maciorowska J, Sobieszczuk-Nowicka E. N 6-methyladenosine (m 6A) RNA modification as a metabolic switch between plant cell survival and death in leaf senescence. Front Plant Sci 2023; 13:1064131. [PMID: 36684776 PMCID: PMC9846058 DOI: 10.3389/fpls.2022.1064131] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
Crop losses caused by climate change and various (a)biotic stressors negatively affect agriculture and crop production. Therefore, it is vital to develop a proper understanding of the complex response(s) to (a)biotic stresses and delineate them for each crop plant as a means to enable translational research. In plants, the improvement of crop quality by m6A editing is believed to be a promising strategy. As a reaction to environmental changes, m6A modification showed a high degree of sensitivity and complexity. We investigated differences in gene medleys between dark-induced leaf senescence (DILS) and developmental leaf senescence in barley, including inter alia RNA modifications active in DILS. The identified upregulated genes in DILS include RNA methyltransferases of different RNA types, embracing enzymes modifying mRNA, tRNA, and rRNA. We have defined a decisive moment in the DILS model which determines the point of no return, but the mechanism of its control is yet to be uncovered. This indicates the possibility of an unknown additional switch between cell survival and cell death. Discoveries of m6A RNA modification changes in certain RNA species in different stages of leaf senescence may uncover the role of such modifications in metabolic reprogramming. Nonetheless, there is no such data about the process of leaf senescence in plants. In this scope, the prospect of finding connections between the process of senescence and m6A modification of RNA in plants seems to be compelling.
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Affiliation(s)
- Elżbieta Rudy
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, Poznań, Poland
| | - Magda Grabsztunowicz
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, Poznań, Poland
| | - Magdalena Arasimowicz-Jelonek
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, Poznań, Poland
| | - Umesh Kumar Tanwar
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, Poznań, Poland
| | - Julia Maciorowska
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, Poznań, Poland
| | - Ewa Sobieszczuk-Nowicka
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, Poznań, Poland
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Tanwar UK, Stolarska E, Rudy E, Paluch-Lubawa E, Grabsztunowicz M, Arasimowicz-Jelonek M, Sobieszczuk-Nowicka E. Metal tolerance gene family in barley: an in silico comprehensive analysis. J Appl Genet 2022; 64:197-215. [PMID: 36586056 PMCID: PMC10076399 DOI: 10.1007/s13353-022-00744-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 01/01/2023]
Abstract
Metal-tolerance proteins (MTPs) are divalent cation transporters that play critical roles in metal tolerance and ion homeostasis in plants. However, a comprehensive study of MTPs is still lacking in crop plants. The current study aimed to comprehensively identify and characterize the MTP gene family in barley (Hordeum vulgare, Hv), an important crop. In total, 12 HvMTPs were identified in the barley genome in this study. They were divided into three phylogenetic groups (Zn-cation diffusion facilitator proteins [CDFs], Fe/Zn-CDFs, and Mn-CDFs) and further subdivided into seven groups (G1, G5, G6, G7, G8, G9, and G12). The majority of MTPs were hydrophobic proteins found in the vacuolar membrane. Gene duplication analysis of HvMTPs revealed one pair of segmental-like duplications in the barley genome. Evolutionary analysis suggested that barley MTPs underwent purifying natural selection. Additionally, the HvMTPs were analyzed in the pan-genome sequences of barley (20 accessions), which suggests that HvMTPs are highly conserved in barley evolution. Cis-acting regulatory elements, microRNA target sites, and protein-protein interaction analysis indicated the role of HvMTPs in a variety of biological processes. Expression profiling suggests that HvMTPs play an active role in maintaining barley nutrient homeostasis throughout its life cycle, and their expression levels were not significantly altered by abiotic stresses like cold, drought, or heat. The expression of barley HvMTP genes in the presence of heavy metals such as Zn2+, Cu2+, As3+, and Cd2+ revealed that these MTPs were induced by at least one metal ion, implying their involvement in metal tolerance or transportation. The identification and comprehensive investigation of MTP gene family members will provide important gene resources for the genetic improvement of crops for metal tolerance, bioremediation, or biofortification of staple crops.
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Affiliation(s)
- Umesh Kumar Tanwar
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland.
| | - Ewelina Stolarska
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Elżbieta Rudy
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Ewelina Paluch-Lubawa
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Magda Grabsztunowicz
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Magdalena Arasimowicz-Jelonek
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland
| | - Ewa Sobieszczuk-Nowicka
- Department of Plant Physiology, Faculty of Biology, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland.
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Grabsztunowicz M, Rantala M, Ivanauskaite A, Blomster T, Koskela MM, Vuorinen K, Tyystjärvi E, Burow M, Overmyer K, Mähönen AP, Mulo P. Root-type ferredoxin-NADP + oxidoreductase isoforms in Arabidopsis thaliana: Expression patterns, location and stress responses. Plant Cell Environ 2021; 44:548-558. [PMID: 33131061 DOI: 10.1111/pce.13932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 06/11/2023]
Abstract
In Arabidopsis, two leaf-type ferredoxin-NADP+ oxidoreductase (LFNR) isoforms function in photosynthetic electron flow in reduction of NADP+ , while two root-type FNR (RFNR) isoforms catalyse reduction of ferredoxin in non-photosynthetic plastids. As the key to understanding, the function of RFNRs might lie in their spatial and temporal distribution in different plant tissues and cell types, we examined expression of RFNR1 and RFNR2 genes using β-glucuronidase (GUS) reporter lines and investigated accumulation of distinct RFNR isoforms using a GFP approach and Western blotting upon various stresses. We show that while RFNR1 promoter is active in leaf veins, root tips and in the stele of roots, RFNR2 promoter activity is present in leaf tips and root stele, epidermis and cortex. RFNR1 protein accumulates as a soluble protein within the plastids of root stele cells, while RFNR2 is mainly present in the outer root layers. Ozone treatment of plants enhanced accumulation of RFNR1, whereas low temperature treatment specifically affected RFNR2 accumulation in roots. We further discuss the physiological roles of RFNR1 and RFNR2 based on characterization of rfnr1 and rfnr2 knock-out plants and show that although the function of these proteins is partly redundant, the RFNR proteins are essential for plant development and survival.
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Affiliation(s)
- Magda Grabsztunowicz
- Department of Biochemistry, Molecular Plant Biology, University of Turku, Turku, Finland
| | - Marjaana Rantala
- Department of Biochemistry, Molecular Plant Biology, University of Turku, Turku, Finland
| | - Aiste Ivanauskaite
- Department of Biochemistry, Molecular Plant Biology, University of Turku, Turku, Finland
| | - Tiina Blomster
- Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland
- Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Minna M Koskela
- Department of Biochemistry, Molecular Plant Biology, University of Turku, Turku, Finland
| | - Katariina Vuorinen
- Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland
| | - Esa Tyystjärvi
- Department of Biochemistry, Molecular Plant Biology, University of Turku, Turku, Finland
| | - Meike Burow
- DynaMo Center, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
- Copenhagen Plant Science Centre, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Kirk Overmyer
- Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland
| | - Ari P Mähönen
- Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland
- Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Paula Mulo
- Department of Biochemistry, Molecular Plant Biology, University of Turku, Turku, Finland
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6
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Grabsztunowicz M, Rokka A, Farooq I, Aro EM, Mulo P. Gel-based proteomic map of Arabidopsis thaliana root plastids and mitochondria. BMC Plant Biol 2020; 20:413. [PMID: 32887556 PMCID: PMC7650296 DOI: 10.1186/s12870-020-02635-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 08/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Non-photosynthetic plastids of plants are known to be involved in a range of metabolic and biosynthetic reactions, even if they have been difficult to study due to their small size and lack of color. The morphology of root plastids is heterogeneous and also the plastid size, density and subcellular distribution varies depending on the cell type and developmental stage, and therefore the functional features have remained obscure. Although the root plastid proteome is likely to reveal specific functional features, Arabidopsis thaliana root plastid proteome has not been studied to date. RESULTS In the present study, we separated Arabidopsis root protein fraction enriched with plastids and mitochondria by 2D-PAGE and identified 84 plastid-targeted and 77 mitochondrion-targeted proteins using LC-MS/MS. The most prevalent root plastid protein categories represented amino acid biosynthesis, carbohydrate metabolism and lipid biosynthesis pathways, while the enzymes involved in starch and sucrose metabolism were not detected. Mitochondrion-targeted proteins were classified mainly into the energetics category. CONCLUSIONS This is the first study presenting gel-based map of Arabidopsis thaliana root plastid and mitochondrial proteome. Our findings suggest that Arabidopsis root plastids have broad biosynthetic capacity, and that they do not play a major role in a long-term storage of carbohydrates. The proteomic map provides a tool for further studies to compare changes in the proteome, e.g. in response to environmental cues, and emphasizes the role of root plastids in nitrogen and sulfur metabolism as well as in amino acid and fatty acid biosynthesis. The results enable taking a first step towards an integrated view of root plastid/mitochondrial proteome and metabolic functions in Arabidopsis thaliana roots.
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Affiliation(s)
| | - Anne Rokka
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, 20520, Turku, Finland
| | - Irum Farooq
- Molecular Plant Biology, University of Turku, 20520, Turku, Finland
| | - Eva-Mari Aro
- Molecular Plant Biology, University of Turku, 20520, Turku, Finland
| | - Paula Mulo
- Molecular Plant Biology, University of Turku, 20520, Turku, Finland.
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Grabsztunowicz M, Mulo P, Baymann F, Mutoh R, Kurisu G, Sétif P, Beyer P, Krieger-Liszkay A. Electron transport pathways in isolated chromoplasts from Narcissus pseudonarcissus L. Plant J 2019; 99:245-256. [PMID: 30888718 DOI: 10.1111/tpj.14319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 03/05/2019] [Accepted: 03/11/2019] [Indexed: 06/09/2023]
Abstract
During daffodil flower development, chloroplasts differentiate into photosynthetically inactive chromoplasts having lost functional photosynthetic reaction centers. Chromoplasts exhibit a respiratory activity reducing oxygen to water and generating ATP. Immunoblots revealed the presence of the plastid terminal oxidase (PTOX), the NAD(P)H dehydrogenase (NDH) complex, the cytochrome b6 f complex, ATP synthase and several isoforms of ferredoxin-NADP+ oxidoreductase (FNR), and ferredoxin (Fd). Fluorescence spectroscopy allowed the detection of chlorophyll a in the cytochrome b6 f complex. Here we characterize the electron transport pathway of chromorespiration by using specific inhibitors for the NDH complex, the cytochrome b6 f complex, FNR and redox-inactive Fd in which the iron was replaced by gallium. Our data suggest an electron flow via two separate pathways, both reducing plastoquinone (PQ) and using PTOX as oxidase. The first oxidizes NADPH via FNR, Fd and cytochrome bh of the cytochrome b6 f complex, and does not result in the pumping of protons across the membrane. In the second, electron transport takes place via the NDH complex using both NADH and NADPH as electron donor. FNR and Fd are not involved in this pathway. The NDH complex is responsible for the generation of the proton gradient. We propose a model for chromorespiration that may also be relevant for the understanding of chlororespiration and for the characterization of the electron input from Fd to the cytochrome b6 f complex during cyclic electron transport in chloroplasts.
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Affiliation(s)
| | - Paula Mulo
- Molecular Plant Biology, University of Turku, 20520, Turku, Finland
| | - Frauke Baymann
- Bioénergétique et Ingénierie des Protéines, UMR 7281, CNRS - Aix-Marseille Université, 31, chemin Joseph Aiguier, 13009, Marseille, France
| | - Risa Mutoh
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Genji Kurisu
- Institute for Protein Research, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Pierre Sétif
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Peter Beyer
- Faculty of Biology, University of Freiburg, 79104, Freiburg, Germany
| | - Anja Krieger-Liszkay
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
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Koskela MM, Brünje A, Ivanauskaite A, Grabsztunowicz M, Lassowskat I, Neumann U, Dinh TV, Sindlinger J, Schwarzer D, Wirtz M, Tyystjärvi E, Finkemeier I, Mulo P. Chloroplast Acetyltransferase NSI Is Required for State Transitions in Arabidopsis thaliana. Plant Cell 2018; 30:1695-1709. [PMID: 29967049 PMCID: PMC6139681 DOI: 10.1105/tpc.18.00155] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 06/15/2018] [Accepted: 06/29/2018] [Indexed: 05/18/2023]
Abstract
The amount of light energy received by the photosynthetic reaction centers photosystem II (PSII) and photosystem I (PSI) is balanced through state transitions. Reversible phosphorylation of a light-harvesting antenna trimer (L-LHCII) orchestrates the association between L-LHCII and the photosystems, thus adjusting the amount of excitation energy received by the reaction centers. In this study, we identified the enzyme NUCLEAR SHUTTLE INTERACTING (NSI; AT1G32070) as an active lysine acetyltransferase in the chloroplasts of Arabidopsis thaliana Intriguingly, nsi knockout mutant plants were defective in state transitions, even though they had a similar LHCII phosphorylation pattern as the wild type. Accordingly, nsi plants were not able to accumulate the PSI-LHCII state transition complex, even though the LHCII docking site of PSI and the overall amounts of photosynthetic protein complexes remained unchanged. Instead, the nsi mutants showed a decreased Lys acetylation status of specific photosynthetic proteins including PSI, PSII, and LHCII subunits. Our work demonstrates that the chloroplast acetyltransferase NSI is needed for the dynamic reorganization of thylakoid protein complexes during photosynthetic state transitions.
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Affiliation(s)
- Minna M Koskela
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20520 Turku, Finland
| | - Annika Brünje
- Plant Physiology, Institute of Plant Biology and Biotechnology, University of Muenster, 48149 Münster, Germany
| | - Aiste Ivanauskaite
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20520 Turku, Finland
| | - Magda Grabsztunowicz
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20520 Turku, Finland
| | - Ines Lassowskat
- Plant Physiology, Institute of Plant Biology and Biotechnology, University of Muenster, 48149 Münster, Germany
- Plant Proteomics, Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Ulla Neumann
- Central Microscopy, Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Trinh V Dinh
- Department of Plant Molecular Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Julia Sindlinger
- Interfaculty Institute of Biochemistry, University of Tübingen, 72076 Tübingen, Germany
| | - Dirk Schwarzer
- Interfaculty Institute of Biochemistry, University of Tübingen, 72076 Tübingen, Germany
| | - Markus Wirtz
- Department of Plant Molecular Biology, Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Esa Tyystjärvi
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20520 Turku, Finland
| | - Iris Finkemeier
- Plant Physiology, Institute of Plant Biology and Biotechnology, University of Muenster, 48149 Münster, Germany
- Plant Proteomics, Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Paula Mulo
- Department of Biochemistry, Molecular Plant Biology, University of Turku, 20520 Turku, Finland
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Grabsztunowicz M, Koskela MM, Mulo P. Post-translational Modifications in Regulation of Chloroplast Function: Recent Advances. Front Plant Sci 2017; 8:240. [PMID: 28280500 PMCID: PMC5322211 DOI: 10.3389/fpls.2017.00240] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 02/08/2017] [Indexed: 05/08/2023]
Abstract
Post-translational modifications (PTMs) of proteins enable fast modulation of protein function in response to metabolic and environmental changes. Phosphorylation is known to play a major role in regulating distribution of light energy between the Photosystems (PS) I and II (state transitions) and in PSII repair cycle. In addition, thioredoxin-mediated redox regulation of Calvin cycle enzymes has been shown to determine the efficiency of carbon assimilation. Besides these well characterized modifications, recent methodological progress has enabled identification of numerous other types of PTMs in various plant compartments, including chloroplasts. To date, at least N-terminal and Lys acetylation, Lys methylation, Tyr nitration and S-nitrosylation, glutathionylation, sumoylation and glycosylation of chloroplast proteins have been described. These modifications impact DNA replication, control transcriptional efficiency, regulate translational machinery and affect metabolic activities within the chloroplast. Moreover, light reactions of photosynthesis as well as carbon assimilation are regulated at multiple levels by a number of PTMs. It is likely that future studies will reveal new metabolic pathways to be regulated by PTMs as well as detailed molecular mechanisms of PTM-mediated regulation.
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Affiliation(s)
| | | | - Paula Mulo
- Molecular Plant Biology, Department of Biochemistry, University of TurkuTurku, Finland
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Yang C, Hu H, Ren H, Kong Y, Lin H, Guo J, Wang L, He Y, Ding X, Grabsztunowicz M, Mulo P, Chen T, Liu Y, Wu Z, Wu Y, Mao C, Wu P, Mo X. LIGHT-INDUCED RICE1 Regulates Light-Dependent Attachment of LEAF-TYPE FERREDOXIN-NADP+ OXIDOREDUCTASE to the Thylakoid Membrane in Rice and Arabidopsis. Plant Cell 2016; 28:712-28. [PMID: 26941088 PMCID: PMC4826015 DOI: 10.1105/tpc.15.01027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 02/04/2016] [Accepted: 03/02/2016] [Indexed: 05/27/2023]
Abstract
LIR1 (LIGHT-INDUCED RICE1) encodes a 13-kD, chloroplast-targeted protein containing two nearly identical motifs of unknown function. LIR1 is present in the genomes of vascular plants, mosses, liverworts, and algae, but not in cyanobacteria. Using coimmunoprecipitation assays, pull-down assays, and yeast two-hybrid analyses, we showed that LIR1 interacts with LEAF-TYPE FERREDOXIN-NADP(+) OXIDOREDUCTASE (LFNR), an essential chloroplast enzyme functioning in the last step of photosynthetic linear electron transfer. LIR1 and LFNR formed high molecular weight thylakoid protein complexes with the TIC62 and TROL proteins, previously shown to anchor LFNR to the membrane. We further showed that LIR1 increases the affinity of LFNRs for TIC62 and that the rapid light-triggered degradation of the LIR1 coincides with the release of the LFNR from the thylakoid membrane. Loss of LIR1 resulted in a marked decrease in the accumulation of LFNR-containing thylakoid protein complexes without a concomitant decrease in total LFNR content. In rice (Oryza sativa), photosynthetic capacity of lir1 plants was slightly impaired, whereas no such effect was observed in Arabidopsis thaliana knockout mutants. The consequences of LIR1 deficiency in different species are discussed.
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Affiliation(s)
- Chao Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Hongtao Hu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China National Engineering Technology Research Center for Slow and Controlled Release Fertilizers, Kingenta Ecological Engineering Group Co., Linyi, Shandong 276700, P.R. China
| | - Hongyan Ren
- College of Life Science, Shaanxi Normal University, Xi'an, Shaanxi Province 710062, P.R. China
| | - Yuzhu Kong
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Hongwei Lin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Jiangfan Guo
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Lingling Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Yi He
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Xiaomeng Ding
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Magda Grabsztunowicz
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Paula Mulo
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland
| | - Tao Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Yu Liu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Zhongchang Wu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Yunrong Wu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Chuanzao Mao
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Ping Wu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
| | - Xiaorong Mo
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, Hangzhou 310058, P.R. China
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Grabsztunowicz M, Górski Z, Luciński R, Jackowski G. A reversible decrease in ribulose 1,5-bisphosphate carboxylase/oxygenase carboxylation activity caused by the aggregation of the enzyme's large subunit is triggered in response to the exposure of moderate irradiance-grown plants to low irradiance. Physiol Plant 2015; 154:591-608. [PMID: 25594504 DOI: 10.1111/ppl.12322] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 12/11/2014] [Accepted: 12/20/2014] [Indexed: 06/04/2023]
Abstract
Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is highly regulated in response to fluctuations in the environment, including changes in irradiance. However, no complex data are available on Rubisco regulatory mechanisms triggered in plants which are submitted to moderate-low irradiance shift. Therefore, we investigated in a comprehensive way the changes at the level of amount of Rubisco protein, its structural organization and carboxylase activity of the holoenzyme as triggered by exposure of moderate irradiance-grown Arabidopsis thaliana plants to low irradiance conditions. An exposure of moderate irradiance-grown plants to low irradiance for a single photoperiod caused the exclusion of a certain pool of Rubisco under altered conditions owing to oxidative modifications resulting in the formation of protein aggregates involving Rubisco large subunit (LS). As a result, both initial and total Rubisco carboxylase activities were reduced, whereas Rubisco activation state remained largely unchanged. The results of the determination of reactive oxygen species indicated that a moderate/low irradiance transition had stimulated (1) O2 accumulation and we strongly suggest that Rubisco oxidative modifications leading to formation of aggregates encompassing Rubisco-LS were triggered by (1) O2 . When moderate irradiance regime was resumed, the majority of Rubisco-LS containing aggregates tended to be resolubilized, and this allowed Rubisco carboxylation activities to be largely recovered, without changes in the activation state of the enzyme. In the longer term, these results allow us to better understand a complexity of Rubisco regulatory mechanisms activated in response to abiotic stresses and during recovery from the stresses.
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Affiliation(s)
- Magda Grabsztunowicz
- Department of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Poznań, 61 614, Poland
| | - Zbigniew Górski
- Department of Physical Chemistry, Institute of Chemistry & Technical Electrochemistry, University of Technology, Poznań, 60 965, Poland
| | - Robert Luciński
- Department of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Poznań, 61 614, Poland
| | - Grzegorz Jackowski
- Department of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Poznań, 61 614, Poland
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12
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Baranek M, Grabsztunowicz M, Sikora B, Jackowski G. [ATP-dependent FtsH and Lon chloroplast proteases]. Postepy Biochem 2011; 57:101-108. [PMID: 21735825] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Arabidopsis thaliana proteome contains 667 proteases; some tens of them are chloroplast-targeted proteins, encoded by genes orthologous to the ones coding for bacterial proteolytic enzymes. It is thought that chloroplast proteases are involved in chloroplasts' proteins turnover and quality control (maturation of nucleus-encoded proteins and removal of nonfunctional ones). Some ATP-dependent chloroplast proteases belonging to FtsH family (especially FtsH2 and FtsH5) are considered to be involved in numerous aspects of chloroplast and whole plant maintenance under non-stressing as well as stressing conditions. This notion is supported by severe phenotype appearance of mutants deficient in these proteases. In contrast to seemingly high physiological importance of chloroplast members of FtsH protease family, only a few individual proteins have been identified so far as their physiological targets (i.e. Lhcb1, Lhcb3, PsbA and Rieske protein). Our knowledge regarding structure and molecular mechanisms of these enzymes' action is limited when compared with what is known about FtsHs of bacterial origin. Equally limited is the knowledge about ATP-dependent Lon4 protease being the single known chloroplast-targeted ortholog of Lon protease of Escherichia coli.
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Grabsztunowicz M, Luciński R, Baranek M, Sikora B, Jackowski G. [Chloroplast Deg proteases]. Postepy Biochem 2011; 57:109-114. [PMID: 21735826] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
For some chloroplast proteases ATP binding and hydrolysis is not necessary for their catalytic activity, most probably because even strongly unfolded substrates may penetrate their catalytic chamber. Deg1, 2, 5 and 8 are the best known of Arabidopsis thaliana ATP- independent chloroplast proteases, encoded by orthologues of genes coding for DegP, DegQ and DegS proteases of Escherichia coli. Current awareness in the area of structure and functions of chloroplast Degs is much more limited vs the one about their bacterial counterparts. Deg5 and Deg8 form a catalytic heterododecamer which is loosely attached to luminal side of thylakoid membrane. The complex catalyses--supported by Deg1 and one of FtsH proteases--the degradation of PsbA damaged due to plant exposition to elevated irradiance and thus these protease are of key importance for the plants' sensitivity to photoinhibition. Deg2 role in the disposal of damaged PsbA has not been elucidated. Recombinant Deg1 may degrade PsbO and plastocyanin in vitro but it is not clear whether this reaction is performed in vivo as well.
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