101
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Busch AWU, Montgomery BL. The Tryptophan-Rich Sensory Protein (TSPO) is Involved in Stress-Related and Light-Dependent Processes in the Cyanobacterium Fremyella diplosiphon. Front Microbiol 2015; 6:1393. [PMID: 26696996 PMCID: PMC4677103 DOI: 10.3389/fmicb.2015.01393] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 11/23/2015] [Indexed: 11/20/2022] Open
Abstract
The tryptophan-rich sensory protein (TSPO) is a membrane protein, which is a member of the 18 kDa translocator protein/peripheral-type benzodiazepine receptor (MBR) family of proteins that is present in most organisms and is also referred to as Translocator protein 18 kDa. Although TSPO is associated with stress- and disease-related processes in organisms from bacteria to mammals, full elucidation of the functional role of the TSPO protein is lacking for most organisms in which it is found. In this study, we describe the regulation and function of a TSPO homolog in the cyanobacterium Fremyella diplosiphon, designated FdTSPO. Accumulation of the FdTSPO transcript is upregulated by green light and in response to nutrient deficiency and stress. A F. diplosiphon TSPO deletion mutant (i.e., ΔFdTSPO) showed altered responses compared to the wild type (WT) strain under stress conditions, including salt treatment, osmotic stress, and induced oxidative stress. Under salt stress, the FdTSPO transcript is upregulated and a ΔFdTSPO mutant accumulates lower levels of reactive oxygen species (ROS) and displays increased growth compared to WT. In response to osmotic stress, FdTSPO transcript levels are upregulated and ΔFdTSPO mutant cells exhibit impaired growth compared to the WT. By comparison, methyl viologen-induced oxidative stress results in higher ROS levels in the ΔFdTSPO mutant compared to the WT strain. Taken together, our results provide support for the involvement of membrane-localized FdTSPO in mediating cellular responses to stress in F. diplosiphon and represent detailed functional analysis of a cyanobacterial TSPO. This study advances our understanding of the functional roles of TSPO homologs in vivo.
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Affiliation(s)
- Andrea W. U. Busch
- Department of Energy – Plant Research Laboratory, Michigan State University, East LansingMI, USA
| | - Beronda L. Montgomery
- Department of Energy – Plant Research Laboratory, Michigan State University, East LansingMI, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, East LansingMI, USA
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102
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Zhuang X, Cui Y, Gao C, Jiang L. Endocytic and autophagic pathways crosstalk in plants. CURRENT OPINION IN PLANT BIOLOGY 2015; 28:39-47. [PMID: 26453966 DOI: 10.1016/j.pbi.2015.08.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 07/25/2015] [Accepted: 08/30/2015] [Indexed: 05/19/2023]
Abstract
The vacuole is the central site for both storage and metabolism in plant cells and mediates multiple cellular events during plant development and growth. Cargo proteins are usually sequestered into membrane-bound organelles and delivered into the vacuole upon membrane fusion. Two major organelles are responsible for the recognition and transport of cargos targeted to the vacuole: the single-membrane multivesicular body (MVB) or prevacuolar compartment (PVC) and the double-membrane autophagosome. Here, we will highlight recent discoveries about MVB/PVC-mediated and autophagosome-mediated protein trafficking and degradation, and will pay special attention to a possible interplay between the endocytic and autophagic pathways in regulating vacuolar degradation in plants.
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Affiliation(s)
- Xiaohong Zhuang
- School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Yong Cui
- School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Caiji Gao
- School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Liwen Jiang
- School of Life Sciences, Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China; CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen 518057, China.
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103
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Li L, Wang H, Gago J, Cui H, Qian Z, Kodama N, Ji H, Tian S, Shen D, Chen Y, Sun F, Xia Z, Ye Q, Sun W, Flexas J, Dong H. Harpin Hpa1 Interacts with Aquaporin PIP1;4 to Promote the Substrate Transport and Photosynthesis in Arabidopsis. Sci Rep 2015; 5:17207. [PMID: 26607179 PMCID: PMC4660436 DOI: 10.1038/srep17207] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 10/27/2015] [Indexed: 12/12/2022] Open
Abstract
Harpin proteins produced by plant-pathogenic Gram-negative bacteria are the venerable player in regulating bacterial virulence and inducing plant growth and defenses. A major gap in these effects is plant sensing linked to cellular responses, and plant sensor for harpin Hpa1 from rice bacterial blight pathogen points to plasma membrane intrinsic protein (PIP). Here we show that Arabidopsis AtPIP1;4 is a plasma membrane sensor of Hpa1 and plays a dual role in plasma membrane permeability of CO2 and H2O. In particular, AtPIP1;4 mediates CO2 transport with a substantial contribute to photosynthesis and further increases this function upon interacting with Hpa1 at the plasma membrane. As a result, leaf photosynthesis rates are increased and the plant growth is enhanced in contrast to the normal process without Hpa1-AtPIP1;4 interaction. Our findings demonstrate the first case that plant sensing of a bacterial harpin protein is connected with photosynthetic physiology to regulate plant growth.
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Affiliation(s)
- Liang Li
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Hao Wang
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Jorge Gago
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears, Palma de Mallorca, Illes Balears 07122, Spain
| | - Haiying Cui
- Institute of Grassland Science, Northeast Normal University and National Ministry of Education Key Laboratory of Vegetation Ecology, Changchun 130024, China
| | - Zhengjiang Qian
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Naomi Kodama
- Agro-Meteorology Division, National Institute for Agro-Environmental Sciences, Tsukuba 305-8604, Japan
| | - Hongtao Ji
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shan Tian
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Dan Shen
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yanjuan Chen
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Fengli Sun
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhonglan Xia
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
| | - Qing Ye
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Wei Sun
- Institute of Grassland Science, Northeast Normal University and National Ministry of Education Key Laboratory of Vegetation Ecology, Changchun 130024, China
| | - Jaume Flexas
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears, Palma de Mallorca, Illes Balears 07122, Spain
| | - Hansong Dong
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
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104
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Kriechbaumer V, Botchway SW, Slade SE, Knox K, Frigerio L, Oparka K, Hawes C. Reticulomics: Protein-Protein Interaction Studies with Two Plasmodesmata-Localized Reticulon Family Proteins Identify Binding Partners Enriched at Plasmodesmata, Endoplasmic Reticulum, and the Plasma Membrane. PLANT PHYSIOLOGY 2015; 169:1933-45. [PMID: 26353761 PMCID: PMC4634090 DOI: 10.1104/pp.15.01153] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 09/08/2015] [Indexed: 05/19/2023]
Abstract
The endoplasmic reticulum (ER) is a ubiquitous organelle that plays roles in secretory protein production, folding, quality control, and lipid biosynthesis. The cortical ER in plants is pleomorphic and structured as a tubular network capable of morphing into flat cisternae, mainly at three-way junctions, and back to tubules. Plant reticulon family proteins (RTNLB) tubulate the ER by dimerization and oligomerization, creating localized ER membrane tensions that result in membrane curvature. Some RTNLB ER-shaping proteins are present in the plasmodesmata (PD) proteome and may contribute to the formation of the desmotubule, the axial ER-derived structure that traverses primary PD. Here, we investigate the binding partners of two PD-resident reticulon proteins, RTNLB3 and RTNLB6, that are located in primary PD at cytokinesis in tobacco (Nicotiana tabacum). Coimmunoprecipitation of green fluorescent protein-tagged RTNLB3 and RTNLB6 followed by mass spectrometry detected a high percentage of known PD-localized proteins as well as plasma membrane proteins with putative membrane-anchoring roles. Förster resonance energy transfer by fluorescence lifetime imaging microscopy assays revealed a highly significant interaction of the detected PD proteins with the bait RTNLB proteins. Our data suggest that RTNLB proteins, in addition to a role in ER modeling, may play important roles in linking the cortical ER to the plasma membrane.
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Affiliation(s)
- Verena Kriechbaumer
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
| | - Stanley W Botchway
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
| | - Susan E Slade
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
| | - Kirsten Knox
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
| | - Lorenzo Frigerio
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
| | - Karl Oparka
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
| | - Chris Hawes
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, United Kingdom (V.K., C.H.);Central Laser Facility, Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory, Research Complex at Harwell, Didcot OX11 0QX, United Kingdom (S.W.B.);Warwickshire Private Hospital (WPH) Proteomics Facility Research Technology Platform (S.E.S.) and School of Life Sciences (S.E.S., L.F.), University of Warwick, Coventry CV4 7AL, United Kingdom; andInstitute of Molecular Plant Sciences, University of Edinburgh, Edinburgh EH9 3JR, United Kingdom (K.K., K.O.)
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105
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Leneveu-Jenvrin C, Bouffartigues E, Maillot O, Cornelis P, Feuilloley MGJ, Connil N, Chevalier S. Expression of the translocator protein (TSPO) from Pseudomonas fluorescens Pf0-1 requires the stress regulatory sigma factors AlgU and RpoH. Front Microbiol 2015; 6:1023. [PMID: 26441945 PMCID: PMC4585239 DOI: 10.3389/fmicb.2015.01023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 09/08/2015] [Indexed: 11/19/2022] Open
Abstract
The translocator protein (TSPO), previously designated as peripheral-type benzodiazepine receptor, is an evolutionary conserved protein that is found in many Eukarya, Archae, and Bacteria, in which it plays several important functions including for example membrane biogenesis, signaling, and stress response. A tspo homolog gene has been identified in several members of the Pseudomonas genus, among which the soil bacterium P. fluorescens Pf0-1. In this bacterium, the tspo gene is located in the vicinity of a putative hybrid histidine kinase-encoding gene. Since tspo has been involved in water stress related response in plants, we explored the effects of hyperosmolarity and temperature on P. fluorescens Pf0-1 tspo expression using a strategy based on lux-reporter fusions. We show that the two genes Pfl01_2810 and tspo are co-transcribed forming a transcription unit. The expression of this operon is growth phase-dependent and is increased in response to high concentrations of NaCl, sucrose and to a D-cycloserine treatment, which are conditions leading to activity of the major cell wall stress responsive extracytoplasmic sigma factor AlgU. Interestingly, the promoter region activity is strongly lowered in a P. aeruginosa algU mutant, suggesting that AlgU may be involved at least partly in the molecular mechanism leading to Pfl01_2810-tspo expression. In silico analysis of this promoter region failed to detect an AlgU consensus binding site; however, a putative binding site for the heat shock response RpoH sigma factor was detected. Accordingly, the promoter activity of the region containing this sequence is increased in response to high growth temperature and slightly lowered in a P. aeruginosa rpoH mutant strain. Taken together, our data suggest that P. fluorescens tspo gene may belong at least partly to the cell wall stress response.
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Affiliation(s)
| | - Emeline Bouffartigues
- Laboratory of Microbiology Signals and Microenvironment, University of Rouen Evreux, France
| | - Olivier Maillot
- Laboratory of Microbiology Signals and Microenvironment, University of Rouen Evreux, France
| | - Pierre Cornelis
- Laboratory of Microbiology Signals and Microenvironment, University of Rouen Evreux, France
| | - Marc G J Feuilloley
- Laboratory of Microbiology Signals and Microenvironment, University of Rouen Evreux, France
| | - Nathalie Connil
- Laboratory of Microbiology Signals and Microenvironment, University of Rouen Evreux, France
| | - Sylvie Chevalier
- Laboratory of Microbiology Signals and Microenvironment, University of Rouen Evreux, France
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106
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Maurel C, Boursiac Y, Luu DT, Santoni V, Shahzad Z, Verdoucq L. Aquaporins in Plants. Physiol Rev 2015; 95:1321-58. [DOI: 10.1152/physrev.00008.2015] [Citation(s) in RCA: 486] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Aquaporins are membrane channels that facilitate the transport of water and small neutral molecules across biological membranes of most living organisms. In plants, aquaporins occur as multiple isoforms reflecting a high diversity of cellular localizations, transport selectivity, and regulation properties. Plant aquaporins are localized in the plasma membrane, endoplasmic reticulum, vacuoles, plastids and, in some species, in membrane compartments interacting with symbiotic organisms. Plant aquaporins can transport various physiological substrates in addition to water. Of particular relevance for plants is the transport of dissolved gases such as carbon dioxide and ammonia or metalloids such as boron and silicon. Structure-function studies are developed to address the molecular and cellular mechanisms of plant aquaporin gating and subcellular trafficking. Phosphorylation plays a central role in these two processes. These mechanisms allow aquaporin regulation in response to signaling intermediates such as cytosolic pH and calcium, and reactive oxygen species. Combined genetic and physiological approaches are now integrating this knowledge, showing that aquaporins play key roles in hydraulic regulation in roots and leaves, during drought but also in response to stimuli as diverse as flooding, nutrient availability, temperature, or light. A general hydraulic control of plant tissue expansion by aquaporins is emerging, and their role in key developmental processes (seed germination, emergence of lateral roots) has been established. Plants with genetically altered aquaporin functions are now tested for their ability to improve plant tolerance to stresses. In conclusion, research on aquaporins delineates ever expanding fields in plant integrative biology thereby establishing their crucial role in plants.
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Affiliation(s)
- Christophe Maurel
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Yann Boursiac
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Doan-Trung Luu
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Véronique Santoni
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Zaigham Shahzad
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
| | - Lionel Verdoucq
- Biochimie et Physiologie Moléculaire des Plantes, Unité Mixte de Recherche 5004, CNRS/INRA/Montpellier SupAgro/Université de Montpellier, Montpellier, France
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107
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Wudick MM, Li X, Valentini V, Geldner N, Chory J, Lin J, Maurel C, Luu DT. Subcellular Redistribution of Root Aquaporins Induced by Hydrogen Peroxide. MOLECULAR PLANT 2015; 8:1103-14. [PMID: 25749111 DOI: 10.1016/j.molp.2015.02.017] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/18/2015] [Accepted: 02/27/2015] [Indexed: 05/08/2023]
Abstract
Aquaporins are water channel proteins that mediate the fine-tuning of cell membrane water permeability during development or in response to environmental stresses. The present work focuses on the oxidative stress-induced redistribution of plasma membrane intrinsic protein (PIP) aquaporins from the plasma membrane (PM) to intracellular membranes. This process was investigated in the Arabidopsis root. Sucrose density gradient centrifugation showed that exposure of roots to 0.5 mM H2O2 induces significant depletion in PM fractions of several abundant PIP homologs after 15 min. Analyses by single-particle tracking and fluorescence correlative spectroscopy showed that, in the PM of epidermal cells, H2O2 treatment induces an increase in lateral motion and a reduction in the density of a fluorescently tagged form of the prototypal AtPIP2;1 isoform, respectively. Co-expression analyses of AtPIP2;1 with endomembrane markers revealed that H2O2 triggers AtPIP2;1 accumulation in the late endosomal compartments. Life-time analyses established that the high stability of PIPs was maintained under oxidative stress conditions, suggesting that H2O2 triggers a mechanism for intracellular sequestration of PM aquaporins without further degradation. In addition to information on cellular regulation of aquaporins, this study provides novel and complementary insights into the dynamic remodeling of plant internal membranes during oxidative stress responses.
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Affiliation(s)
- Michael M Wudick
- Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes, UMR 5004 CNRS/UMR 0386 INRA/Montpellier SupAgro/Université Montpellier 2, 2, Place Viala, F-34060 Montpellier Cedex 2, France
| | - Xiaojuan Li
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Valeria Valentini
- Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes, UMR 5004 CNRS/UMR 0386 INRA/Montpellier SupAgro/Université Montpellier 2, 2, Place Viala, F-34060 Montpellier Cedex 2, France
| | - Niko Geldner
- Department of Plant Molecular Biology, Université de Lausanne, 1015 Lausanne, Switzerland
| | - Joanne Chory
- Plant Molecular and Cellular Biology Laboratory, The Salk Institute, La Jolla, CA 92037, USA
| | - Jinxing Lin
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Christophe Maurel
- Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes, UMR 5004 CNRS/UMR 0386 INRA/Montpellier SupAgro/Université Montpellier 2, 2, Place Viala, F-34060 Montpellier Cedex 2, France.
| | - Doan-Trung Luu
- Biochimie et Physiologie Moléculaire des Plantes, Institut de Biologie Intégrative des Plantes, UMR 5004 CNRS/UMR 0386 INRA/Montpellier SupAgro/Université Montpellier 2, 2, Place Viala, F-34060 Montpellier Cedex 2, France.
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108
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Batoko H, Jurkiewicz P, Veljanovski V. Translocator proteins, porphyrins and abiotic stress: new light? TRENDS IN PLANT SCIENCE 2015; 20:261-263. [PMID: 25814326 DOI: 10.1016/j.tplants.2015.03.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/10/2015] [Accepted: 03/11/2015] [Indexed: 06/04/2023]
Abstract
After four decades of extensive studies, the role of membrane-bound Translocator proteins (TSPOs) remains unclear and even controversial. In light of recent insights into the structure and activity of TSPOs, showing that they cannot only bind, but also enzymatically photodegrade protoporphyrin IX, we discuss their emerging physiological roles and regulation.
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Affiliation(s)
- Henri Batoko
- Institut des Sciences de la Vie (ISV), Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium.
| | - Pawel Jurkiewicz
- Institut des Sciences de la Vie (ISV), Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - Vasko Veljanovski
- Institut des Sciences de la Vie (ISV), Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
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