1
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Wannitikul P, Dachphun I, Sakulkoo J, Suttangkakul A, Wonnapinij P, Simister R, Gomez LD, Vuttipongchaikij S. In Vivo Proximity Cross-Linking and Immunoprecipitation of Cell Wall Epitopes Identify Proteins Associated with the Biosynthesis of Matrix Polysaccharides. ACS OMEGA 2024; 9:31438-31454. [PMID: 39072051 PMCID: PMC11270709 DOI: 10.1021/acsomega.4c00534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 06/21/2024] [Accepted: 06/27/2024] [Indexed: 07/30/2024]
Abstract
Identification of proteins involved in cell wall matrix polysaccharide biosynthesis is crucial to understand plant cell wall biology. We utilized in vivo cross-linking and immunoprecipitation with cell wall antibodies that recognized xyloglucan, xylan, mannan, and homogalacturonan to capture proteins associated with matrix polysaccharides in Arabidopsis protoplasts. The use of cross-linkers allowed us to capture proteins actively associated with cell wall polymers, including those directly interacting with glycans via glycan-protein (GP) cross-linkers and those associated with proteins linked to glycans via a protein-protein (PP) cross-linker. Immunoprecipitations led to the identification of 65 Arabidopsis protein IDs localized in the Golgi, ER, plasma membrane, and others without subcellular localization data. Among these, we found several glycosyltransferases directly involved in polysaccharide synthesis, along with proteins related to cell wall modification and vesicle trafficking. Protein interaction networks from DeepAraPPI and AtMAD databases showed interactions between various IDs, including those related to cell-wall-associated proteins and membrane/vesicle trafficking proteins. Gene expression and coexpression analyses supported the presence and relevance of the proteins to the cell wall processes. Reverse genetic studies using T-DNA insertion mutants of selected proteins revealed changes in cell wall composition and saccharification, further supporting their potential roles in cell wall biosynthesis. Overall, our approach represents a novel approach for studying cell wall polysaccharide biosynthesis and associated proteins, providing advantages over traditional immunoprecipitation techniques. This study provides a list of putative proteins associated with different matrix polysaccharides for further investigation and highlights the complexity of cell wall biosynthesis and trafficking within plant cells.
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Affiliation(s)
- Pitchaporn Wannitikul
- Department
of Genetics, Faculty of Science, Kasetsart
University, 50 Ngarm Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
| | - Issariya Dachphun
- Department
of Genetics, Faculty of Science, Kasetsart
University, 50 Ngarm Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
| | - Jenjira Sakulkoo
- Department
of Genetics, Faculty of Science, Kasetsart
University, 50 Ngarm Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
| | - Anongpat Suttangkakul
- Department
of Genetics, Faculty of Science, Kasetsart
University, 50 Ngarm Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Center
of Advanced Studies for Tropical Natural Resources, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Omics
Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - Passorn Wonnapinij
- Department
of Genetics, Faculty of Science, Kasetsart
University, 50 Ngarm Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Center
of Advanced Studies for Tropical Natural Resources, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Omics
Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - Rachael Simister
- CNAP,
Department of Biology, University of York, Heslington, York YO10 5DD, United
Kingdom
| | - Leonardo D. Gomez
- CNAP,
Department of Biology, University of York, Heslington, York YO10 5DD, United
Kingdom
| | - Supachai Vuttipongchaikij
- Department
of Genetics, Faculty of Science, Kasetsart
University, 50 Ngarm Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Center
of Advanced Studies for Tropical Natural Resources, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Omics
Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
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2
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Bai Y, Tian D, Chen P, Wu D, Du K, Zheng B, Shi X. A Pectate Lyase Gene Plays a Critical Role in Xylem Vascular Development in Arabidopsis. Int J Mol Sci 2023; 24:10883. [PMID: 37446058 DOI: 10.3390/ijms241310883] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/23/2023] [Accepted: 06/25/2023] [Indexed: 07/15/2023] Open
Abstract
As a major component of the plant primary cell wall, structure changes in pectin may affect the formation of the secondary cell wall and lead to serious consequences on plant growth and development. Pectin-modifying enzymes including pectate lyase-like proteins (PLLs) participate in the remodeling of pectin during organogenesis, especially during fruit ripening. In this study, we used Arabidopsis as a model system to identify critical PLL genes that are of particular importance for vascular development. Four PLL genes, named AtPLL15, AtPLL16, AtPLL19, and AtPLL26, were identified for xylem-specific expression. A knock-out T-DNA mutant of AtPLL16 displayed an increased amount of pectin, soluble sugar, and acid-soluble lignin (ASL). Interestingly, the atpll16 mutant exhibited an irregular xylem phenotype, accompanied by disordered xylem ray cells and an absence of interfascicular phloem fibers. The xylem fiber cell walls in the atpll16 mutant were thicker than those of the wild type. On the contrary, AtPLL16 overexpression resulted in expansion of the phloem and a dramatic change in the xylem-to-phloem ratios. Altogether, our data suggest that AtPLL16 as a pectate lyase plays an important role during vascular development in Arabidopsis.
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Affiliation(s)
- Yun Bai
- College of Horticulture, Jilin Agricultural University, Changchun 130118, China
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Dongdong Tian
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Peng Chen
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Dan Wu
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Kebing Du
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- Poplar Research Center, Huazhong Agricultural University, Wuhan 430070, China
| | - Bo Zheng
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- Poplar Research Center, Huazhong Agricultural University, Wuhan 430070, China
| | - Xueping Shi
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- Poplar Research Center, Huazhong Agricultural University, Wuhan 430070, China
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3
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McFarlane HE. Open questions in plant cell wall synthesis. JOURNAL OF EXPERIMENTAL BOTANY 2023:erad110. [PMID: 36961357 DOI: 10.1093/jxb/erad110] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Indexed: 06/18/2023]
Abstract
Plant cells are surrounded by strong yet flexible polysaccharide-based cell walls that support the cell while also allowing growth by cell expansion. Plant cell wall research has advanced tremendously in recent years. Sequenced genomes of many model and crop plants have facilitated cataloging and characterization of many enzymes involved in cell wall synthesis. Structural information has been generated for several important cell wall synthesizing enzymes. Important tools have been developed including antibodies raised against a variety of cell wall polysaccharides and glycoproteins, collections of enzyme clones and synthetic glycan arrays for characterizing enzymes, herbicides that specifically affect cell wall synthesis, live-cell imaging probes to track cell wall synthesis, and an inducible secondary cell wall synthesis system. Despite these advances, and often because of the new information they provide, many open questions about plant cell wall polysaccharide synthesis persist. This article highlights some of the key questions that remain open, reviews the data supporting different hypotheses that address these questions, and discusses technological developments that may answer these questions in the future.
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Affiliation(s)
- Heather E McFarlane
- Department of Cell & Systems Biology, University of Toronto, 25 Harbord St., Toronto, ON, M5S 3G5, Canada
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4
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Sinclair R, Hsu G, Davis D, Chang M, Rosquete M, Iwasa JH, Drakakaki G. Plant cytokinesis and the construction of new cell wall. FEBS Lett 2022; 596:2243-2255. [PMID: 35695093 DOI: 10.1002/1873-3468.14426] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 11/10/2022]
Abstract
Cytokinesis in plants is fundamentally different from that in animals and fungi. In plant cells, a cell plate forms through the fusion of cytokinetic vesicles and then develops into the new cell wall, partitioning the cytoplasm of the dividing cell. The formation of the cell plate entails multiple stages that involve highly orchestrated vesicle accumulation, fusion, and membrane maturation, which occur concurrently with the timely deposition of polysaccharides such as callose, cellulose, and cross-linking glycans. This review summarizes the major stages in cytokinesis, endomembrane components involved in cell plate assembly and its transition to a new cell wall. An animation that can be widely used for educational purposes further summarizes the process.
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Affiliation(s)
- Rosalie Sinclair
- Department of Plant Sciences University of California Davis, Davis, CA, 95616, USA
| | - Grace Hsu
- Department of Biochemistry University of Utah, School of Medicine, Salt Lake City, UT, 84112, USA
| | - Destiny Davis
- Department of Plant Sciences University of California Davis, Davis, CA, 95616, USA.,Current address: Lawrence Berkeley National Lab, Emeryville, CA, 94608, USA
| | - Mingqin Chang
- Department of Plant Sciences University of California Davis, Davis, CA, 95616, USA
| | - Michel Rosquete
- Department of Plant Sciences University of California Davis, Davis, CA, 95616, USA.,Current address: Plant Biology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Janet H Iwasa
- Department of Biochemistry University of Utah, School of Medicine, Salt Lake City, UT, 84112, USA
| | - Georgia Drakakaki
- Department of Plant Sciences University of California Davis, Davis, CA, 95616, USA
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5
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Kang BH, Anderson CT, Arimura SI, Bayer E, Bezanilla M, Botella MA, Brandizzi F, Burch-Smith TM, Chapman KD, Dünser K, Gu Y, Jaillais Y, Kirchhoff H, Otegui MS, Rosado A, Tang Y, Kleine-Vehn J, Wang P, Zolman BK. A glossary of plant cell structures: Current insights and future questions. THE PLANT CELL 2022; 34:10-52. [PMID: 34633455 PMCID: PMC8846186 DOI: 10.1093/plcell/koab247] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/29/2021] [Indexed: 05/03/2023]
Abstract
In this glossary of plant cell structures, we asked experts to summarize a present-day view of plant organelles and structures, including a discussion of outstanding questions. In the following short reviews, the authors discuss the complexities of the plant cell endomembrane system, exciting connections between organelles, novel insights into peroxisome structure and function, dynamics of mitochondria, and the mysteries that need to be unlocked from the plant cell wall. These discussions are focused through a lens of new microscopy techniques. Advanced imaging has uncovered unexpected shapes, dynamics, and intricate membrane formations. With a continued focus in the next decade, these imaging modalities coupled with functional studies are sure to begin to unravel mysteries of the plant cell.
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Affiliation(s)
- Byung-Ho Kang
- 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
| | - Charles T Anderson
- Department of Biology and Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, Pennsylvania 16802 USA
| | - Shin-ichi Arimura
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
| | - Emmanuelle Bayer
- Université de Bordeaux, CNRS, Laboratoire de Biogenèse Membranaire, UMR 5200, Villenave d'Ornon F-33140, France
| | - Magdalena Bezanilla
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755, USA
| | - Miguel A Botella
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortifruticultura Subtropical y Mediterránea “La Mayora,” Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Universidad de Málaga, Málaga 29071, Spain
| | - Federica Brandizzi
- MSU-DOE Plant Research Lab, Michigan State University, East Lansing, Michigan 48824 USA
- Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824, USA
- Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, Michigan 48824, USA
| | - Tessa M Burch-Smith
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Kent D Chapman
- BioDiscovery Institute and Department of Biological Sciences, University of North Texas, Denton, Texas 76203, USA
| | - Kai Dünser
- Faculty of Biology, Chair of Molecular Plant Physiology (MoPP) University of Freiburg, Freiburg 79104, Germany
- Center for Integrative Biological Signalling Studies (CIBSS), University of Freiburg, Freiburg 79104, Germany
| | - Yangnan Gu
- Department of Plant and Microbial Biology, Innovative Genomics Institute, University of California, Berkeley, California 94720, USA
| | - Yvon Jaillais
- Laboratoire Reproduction et Développement des Plantes (RDP), Université de Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, Lyon, France
| | - Helmut Kirchhoff
- Institute of Biological Chemistry, Washington State University, Pullman, Washington 99164, USA
| | - Marisa S Otegui
- Department of Botany and Center for Quantitative Cell Imaging, University of Wisconsin-Madison, Wisconsin 53706, USA
| | - Abel Rosado
- Department of Botany, University of British Columbia, Vancouver V6T1Z4, Canada
| | - Yu Tang
- Department of Plant and Microbial Biology, Innovative Genomics Institute, University of California, Berkeley, California 94720, USA
| | - Jürgen Kleine-Vehn
- Faculty of Biology, Chair of Molecular Plant Physiology (MoPP) University of Freiburg, Freiburg 79104, Germany
- Center for Integrative Biological Signalling Studies (CIBSS), University of Freiburg, Freiburg 79104, Germany
| | - Pengwei Wang
- Key Laboratory of Horticultural Plant Biology (MOE), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Bethany Karlin Zolman
- Department of Biology, University of Missouri, St. Louis, St. Louis, Missouri 63121, USA
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6
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An Y, Lu W, Li W, Pan L, Lu M, Cesarino I, Li Z, Zeng W. Dietary Fiber in Plant Cell Walls—The Healthy Carbohydrates. FOOD QUALITY AND SAFETY 2022. [DOI: 10.1093/fqsafe/fyab037] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Dietary fiber (DF) is one of the major classes of nutrients for humans. It is widely distributed in the edible parts of natural plants, with the cell wall being the main DF-containing structure. The DF content varies significantly in different plant species and organs, and the processing procedure can have a dramatic effect on the DF composition of plant-based foods. Given the considerable nutritional value of DF, a deeper understanding of DF in food plants, including its composition and biosynthesis, is fundamental to the establishment of a daily intake reference of DF and is also critical to molecular breeding programs for modifying DF content. In the past decades, plant cell wall biology has seen dramatic progress, and such knowledge is of great potential to be translated into DF-related food science research and may provide future research directions for improving the health benefits of food crops. In this review, to spark interdisciplinary discussions between food science researchers and plant cell wall biologists, we focus on a specific category of DF—cell wall carbohydrates. We first summarize the content and composition of carbohydrate DF in various plant-based foods, and then discuss the structure and biosynthesis mechanism of each carbohydrate DF category, in particular the respective biosynthetic enzymes. Health impacts of DF are highlighted, and finally, future directions of DF research are also briefly outlined.
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Affiliation(s)
| | | | | | | | | | - Igor Cesarino
- Department of Botany, Institute of Biosciences, University of São Paulo, Rua do Matão, São Paulo, Brazil
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7
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Lamberti C, Nebbia S, Antoniazzi S, Cirrincione S, Marengo E, Manfredi M, Smorgon D, Monti G, Faccio A, Giuffrida MG, Balestrini R, Cavallarin L. Effect of hot air and infrared roasting on hazelnut allergenicity. Food Chem 2020; 342:128174. [PMID: 33077287 DOI: 10.1016/j.foodchem.2020.128174] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 08/26/2020] [Accepted: 09/21/2020] [Indexed: 01/23/2023]
Abstract
Roasting is known to affect the protein profile and allergenicity of hazelnuts (Corylus avellana cv TGL). The aim of the study was to investigate whether roasting techniques based on different heat transfer methods (hot air and infrared), differently affect the protein solubility and the IgE-binding capacities of both the soluble and insoluble hazelnut protein fractions. The immune-reactivity of the Cor a 9, Cor a 11 and Cor a 14 allergens resulted to be stable after roasting at 140 °C, for both types of treatment, while roasting at 170 °C caused a reduction in IgE-binding, which was particularly noticeable after infrared processing, that led to an almost complete disappearance of allergenicity. Microscopical analyses showed that roasting caused cytoplasmic network disruption, with a loss of lipid compartmentalization, as well as an alteration of the structure of the protein bodies and of the cell wall organization.
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Affiliation(s)
- Cristina Lamberti
- Institute of the Science of Food Production - National Research Council, Largo Braccini 2, 10095 Grugliasco, TO, Italy.
| | - Stefano Nebbia
- Institute of the Science of Food Production - National Research Council, Largo Braccini 2, 10095 Grugliasco, TO, Italy.
| | - Sara Antoniazzi
- Institute of the Science of Food Production - National Research Council, Largo Braccini 2, 10095 Grugliasco, TO, Italy.
| | - Simona Cirrincione
- Institute of the Science of Food Production - National Research Council, Largo Braccini 2, 10095 Grugliasco, TO, Italy.
| | - Emilio Marengo
- Center for Translational Research on Autoimmune and Allergic Disease - CAAD, University of Piemonte Orientale, Corso Trieste 15/A, 28100 Novara, Italy.
| | - Marcello Manfredi
- Center for Translational Research on Autoimmune and Allergic Disease - CAAD, University of Piemonte Orientale, Corso Trieste 15/A, 28100 Novara, Italy.
| | - Denis Smorgon
- Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Torino, Italy.
| | - Giovanna Monti
- SC Pediatria, Regina Margherita Children's Hospital, Città della Scienza e della Salute, Piazza Polonia 94, 10126 Torino, Italy.
| | - Antonella Faccio
- Institute for Sustainable Plant Protection - National Research Council, Viale Mattioli 25, 10125 Torino, Italy.
| | - Maria Gabriella Giuffrida
- Institute of the Science of Food Production - National Research Council, Largo Braccini 2, 10095 Grugliasco, TO, Italy.
| | - Raffaella Balestrini
- Institute for Sustainable Plant Protection - National Research Council, Viale Mattioli 25, 10125 Torino, Italy.
| | - Laura Cavallarin
- Institute of the Science of Food Production - National Research Council, Largo Braccini 2, 10095 Grugliasco, TO, Italy.
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8
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Vieira V, Pain C, Wojcik S, Spatola Rossi T, Denecke J, Osterrieder A, Hawes C, Kriechbaumer V. Living on the edge: the role of Atgolgin-84A at the plant ER-Golgi interface. J Microsc 2020; 280:158-173. [PMID: 32700322 DOI: 10.1111/jmi.12946] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/15/2020] [Accepted: 07/20/2020] [Indexed: 12/18/2022]
Abstract
The plant Golgi apparatus is responsible for the processing of proteins received from the endoplasmic reticulum (ER) and their distribution to multiple destinations within the cell. Golgi matrix components, such as golgins, have been identified and suggested to function as putative tethering factors to mediate the physical connections between Golgi bodies and the ER network. Golgins are proteins anchored to the Golgi membrane by the C-terminus either through transmembrane domains or interaction with small regulatory GTPases. The golgin N-terminus contains long coiled-coil domains, which consist of a number of α-helices wrapped around each other to form a structure similar to a rope being made from several strands, reaching into the cytoplasm. In animal cells, golgins are also implicated in specific recognition of cargo at the Golgi.Here, we investigate the plant golgin Atgolgin-84A for its subcellular localization and potential role as a tethering factor at the ER-Golgi interface. For this, fluorescent fusions of Atgolgin-84A and an Atgolgin-84A truncation lacking the coiled-coil domains (Atgolgin-84AΔ1-557) were transiently expressed in tobacco leaf epidermal cells and imaged using high-resolution confocal microscopy. We show that Atgolgin-84A localizes to a pre-cis-Golgi compartment that is also labelled by one of the COPII proteins as well as by the tether protein AtCASP. Upon overexpression of Atgolgin-84A or its deletion mutant, transport between the ER and Golgi bodies is impaired and cargo proteins are redirected to the vacuole. LAY DESCRIPTION: The Golgi apparatus is a specialised compartment found in mammalian and plant cells. It is the post office of the cell and packages proteins into small membrane boxes for transport to their destination in the cell. The plant Golgi apparatus consist of many separate Golgi bodies and is responsible for the processing of proteins received from the endoplasmic reticulum (ER) and their distribution to multiple destinations within the cell. Specialised proteins called golgins have been suggested to tether Golgi bodies and the ER. Here we investigate the plant golgin Atgolgin-84A for its exact within the Golgi body and its potential role as a tethering factor at the ER-Golgi interface. For this, we have fused Atgolgin-84A with a fluorescent protein from jellyfish and we are producing this combination in tobacco leaf cells. This allows us to see the protein using laser microscopy. We show that Atgolgin-84A localises to a compartment between the ER and Golgi that is also labelled by the tether protein AtCASP. When Atgolgin-84A is produced in high amounts in the cell, transport between the ER and Golgi bodies is inhibited and proteins are redirected to the vacuole.
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Affiliation(s)
- V Vieira
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K.,Department of Animal and Plant Sciences, The University of Sheffield, Western Bank, Sheffield, U.K
| | - C Pain
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K
| | - S Wojcik
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K
| | - T Spatola Rossi
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K
| | - J Denecke
- Centre for Plant Sciences, School of Biology, University of Leeds, Leeds, U.K
| | - A Osterrieder
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K.,Bioethics and Engagement, Mahidol Oxford Tropical Medicine Research Unit (MORU), Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, U.K
| | - C Hawes
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K
| | - V Kriechbaumer
- Plant Cell Biology, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford, U.K
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9
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Optimization of nucleotide sugar supply for polysaccharide formation via thermodynamic buffering. Biochem J 2020; 477:341-356. [PMID: 31967651 DOI: 10.1042/bcj20190807] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/16/2019] [Accepted: 12/18/2019] [Indexed: 02/07/2023]
Abstract
Plant polysaccharides (cellulose, hemicellulose, pectin, starch) are either direct (i.e. leaf starch) or indirect products of photosynthesis, and they belong to the most abundant organic compounds in nature. Although each of these polymers is made by a specific enzymatic machinery, frequently in different cell locations, details of their synthesis share certain common features. Thus, the production of these polysaccharides is preceded by the formation of nucleotide sugars catalyzed by fully reversible reactions of various enzymes, mostly pyrophosphorylases. These 'buffering' enzymes are, generally, quite active and operate close to equilibrium. The nucleotide sugars are then used as substrates for irreversible reactions of various polysaccharide-synthesizing glycosyltransferases ('engine' enzymes), e.g. plastidial starch synthases, or plasma membrane-bound cellulose synthase and callose synthase, or ER/Golgi-located variety of glycosyltransferases forming hemicellulose and pectin backbones. Alternatively, the irreversible step might also be provided by a carrier transporting a given immediate precursor across a membrane. Here, we argue that local equilibria, established within metabolic pathways and cycles resulting in polysaccharide production, bring stability to the system via the arrangement of a flexible supply of nucleotide sugars. This metabolic system is itself under control of adenylate kinase and nucleoside-diphosphate kinase, which determine the availability of nucleotides (adenylates, uridylates, guanylates and cytidylates) and Mg2+, the latter serving as a feedback signal from the nucleotide metabolome. Under these conditions, the supply of nucleotide sugars to engine enzymes is stable and constant, and the metabolic process becomes optimized in its load and consumption, making the system steady and self-regulated.
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10
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The Expression of Potato Expansin A3 ( StEXPA3) and Extensin4 ( StEXT4) Genes with Distribution of StEXPAs and HRGPs-Extensin Changes as an Effect of Cell Wall Rebuilding in Two Types of PVY NTN- Solanum tuberosum Interactions. Viruses 2020; 12:v12010066. [PMID: 31948116 PMCID: PMC7020060 DOI: 10.3390/v12010066] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 12/18/2019] [Accepted: 01/03/2020] [Indexed: 01/06/2023] Open
Abstract
The plant cell wall acts not only as a physical barrier, but also as a complex and dynamic structure that actively changes under different biotic and abiotic stress conditions. The question is, how are the different cell wall compounds modified during different interactions with exogenous stimuli such as pathogens? Plants exposed to viral pathogens respond to unfavorable conditions on multiple levels. One challenge that plants face under viral stress is the number of processes required for differential cell wall remodeling. The key players in these conditions are the cell wall genes and proteins, which can be regulated in specific ways during the interactions and have direct influences on the rebuilding of the cell wall structure. The cell wall modifications occurring in plants during viral infection remain poorly described. Therefore, this study focuses on cell wall dynamics as an effect of incompatible interactions between the potato virus Y (PVYNTN) and resistant potatoes (hypersensitive plant), as well as compatible (susceptible plant) interactions. Our analysis describes, for the first time, the expression of the potato expansin A3 (StEXPA3) and potato extensin 4 (StEXT4) genes in PVYNTN-susceptible and -resistant potato plant interactions. The results indicated a statistically significant induction of the StEXPA3 gene during a susceptible response. By contrast, we demonstrated the predominantly gradual activation of the StEXT4 gene during the hypersensitive response to PVYNTN inoculation. Moreover, the in situ distributions of expansins (StEXPAs), which are essential cell wall-associated proteins, and the hydroxyproline-rich glycoprotein (HRGP) extensin were investigated in two types of interactions. Furthermore, cell wall loosening was accompanied by an increase in StEXPA deposition in a PVYNTN-susceptible potato, whereas the HRGP content dynamically increased during the hypersensitive response, when the cell wall was reinforced. Ultrastructural localization and quantification revealed that the HRGP extensin was preferably located in the apoplast, but deposition in the symplast was also observed in resistant plants. Interestingly, during the hypersensitive response, StEXPA proteins were mainly located in the symplast area, in contrast to the susceptible potato where StEXPA proteins were mainly observed in the cell wall. These findings revealed that changes in the intracellular distribution and abundance of StEXPAs and HRGPs can be differentially regulated, depending on different types of PVYNTN–potato plant interactions, and confirmed the involvement of apoplast and symplast activation as a defense response mechanism.
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11
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Meents MJ, Motani S, Mansfield SD, Samuels AL. Organization of Xylan Production in the Golgi During Secondary Cell Wall Biosynthesis. PLANT PHYSIOLOGY 2019; 181:527-546. [PMID: 31431513 PMCID: PMC6776863 DOI: 10.1104/pp.19.00715] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/02/2019] [Indexed: 05/16/2023]
Abstract
Secondary cell wall (SCW) production during xylem development requires massive up-regulation of hemicellulose (e.g. glucuronoxylan) biosynthesis in the Golgi. Although mutant studies have revealed much of the xylan biosynthetic machinery, the precise arrangement of these proteins and their products in the Golgi apparatus is largely unknown. We used a fluorescently tagged xylan backbone biosynthetic protein (IRREGULAR XYLEM9; IRX9) as a marker of xylan production in the Golgi of developing protoxylem tracheary elements in Arabidopsis (Arabidopsis thaliana). Both live-cell confocal and transmission electron microscopy (TEM) revealed SCW deposition is accompanied by a significant proliferation of Golgi stacks. Furthermore, although Golgi stacks were randomly distributed, the organization of the cytoplasm ensured their close proximity to developing SCWs. Quantitative immuno-TEM revealed IRX9 is present in a specific subdomain of the Golgi stack and was most abundant in the ring of the inner margins of medial cisternae where fenestrations are abundant. Conversely, the xylan product accumulated in swollen trans cisternal margins and the Trans-Golgi network (TGN). The irx9 mutant lacked this expansion for both the cisternal margins and the TGN, whereas Golgi stack proliferation was unaffected. Golgi in irx9 also displayed dramatic changes in their structure, with increases in cisternal fenestration and tubulation. Our data support a new model where xylan biosynthesis and packaging into secretory vesicles are localized in distinct structural and functional domains of the Golgi. Rather than polysaccharide biosynthesis occurring in the center of the cisternae, IRX9 and the xylan product are arranged in successive concentric rings in Golgi cisternae.
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Affiliation(s)
- Miranda J Meents
- Department of Botany, University of British Columbia, Vancouver V6T 1Z4 British Columbia
- Department of Wood Science, University of British Columbia, Vancouver V6T 1Z4 British Columbia
| | - Sanya Motani
- Department of Botany, University of British Columbia, Vancouver V6T 1Z4 British Columbia
| | - Shawn D Mansfield
- Department of Wood Science, University of British Columbia, Vancouver V6T 1Z4 British Columbia
| | - A Lacey Samuels
- Department of Botany, University of British Columbia, Vancouver V6T 1Z4 British Columbia
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12
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Wilkop T, Pattathil S, Ren G, Davis DJ, Bao W, Duan D, Peralta AG, Domozych DS, Hahn MG, Drakakaki G. A Hybrid Approach Enabling Large-Scale Glycomic Analysis of Post-Golgi Vesicles Reveals a Transport Route for Polysaccharides. THE PLANT CELL 2019; 31:627-644. [PMID: 30760563 PMCID: PMC6482635 DOI: 10.1105/tpc.18.00854] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/22/2019] [Accepted: 02/12/2019] [Indexed: 05/10/2023]
Abstract
The plant endomembrane system facilitates the transport of polysaccharides, associated enzymes, and glycoproteins through its dynamic pathways. Although enzymes involved in cell wall biosynthesis have been identified, little is known about the endomembrane-based transport of glycan components. This is partially attributed to technical challenges in biochemically determining polysaccharide cargo in specific vesicles. Here, we introduce a hybrid approach addressing this limitation. By combining vesicle isolation with a large-scale carbohydrate antibody arraying technique, we charted an initial large-scale map describing the glycome profile of the SYNTAXIN OF PLANTS61 (SYP61) trans-Golgi network compartment in Arabidopsis (Arabidopsis thaliana). A library of antibodies recognizing specific noncellulosic carbohydrate epitopes allowed us to identify a range of diverse glycans, including pectins, xyloglucans (XyGs), and arabinogalactan proteins in isolated vesicles. Changes in XyG- and pectin-specific epitopes in the cell wall of an Arabidopsis SYP61 mutant corroborate our findings. Our data provide evidence that SYP61 vesicles are involved in the transport and deposition of structural polysaccharides and glycoproteins. Adaptation of our methodology can enable studies characterizing the glycome profiles of various vesicle populations in plant and animal systems and their respective roles in glycan transport defined by subcellular markers, developmental stages, or environmental stimuli.
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Affiliation(s)
- Thomas Wilkop
- Department of Plant Sciences, University of California, Davis, California 95616
- Light Microscopy Core, University of Kentucky, Lexington, Kentucky 40536
| | - Sivakumar Pattathil
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602-4712
| | - Guangxi Ren
- Department of Plant Sciences, University of California, Davis, California 95616
| | - Destiny J Davis
- Department of Plant Sciences, University of California, Davis, California 95616
| | - Wenlong Bao
- Department of Plant Sciences, University of California, Davis, California 95616
| | - Dechao Duan
- Department of Plant Sciences, University of California, Davis, California 95616
| | - Angelo G Peralta
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602-4712
| | - David S Domozych
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866
| | - Michael G Hahn
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602-4712
- Department of Plant Biology, University of Georgia, Athens, Georgia 30602-7271
| | - Georgia Drakakaki
- Department of Plant Sciences, University of California, Davis, California 95616
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13
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Anderson CT. Finding order in a bustling construction zone: quantitative imaging and analysis of cell wall assembly in plants. CURRENT OPINION IN PLANT BIOLOGY 2018; 46:62-67. [PMID: 30107305 DOI: 10.1016/j.pbi.2018.07.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 07/16/2018] [Accepted: 07/25/2018] [Indexed: 06/08/2023]
Abstract
Assembly of polysaccharide-based walls by plant cells involves the rapid synthesis, trafficking, and deposition of complex biopolymers, but how these events are controlled and coordinated to achieve a strong, resilient extracellular matrix has remained obscure for decades. Recent quantitative analyses of fluorescence microscopy data have revealed details of the trafficking and synthetic activity of cellulose synthases, and new methods for labeling matrix polymers have unveiled aspects of their regulated deposition in the wall. Detailed studies of the identity, architecture, activity, and trafficking of the proteins and protein complexes that synthesize wall polymers, combined with advances in image acquisition and analysis, will aid future efforts to dissect wall assembly.
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Affiliation(s)
- Charles T Anderson
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA; Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA.
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Transient expression of a bovine leukemia virus envelope glycoprotein in plants by a recombinant TBSV vector. J Virol Methods 2018; 255:1-7. [PMID: 29410083 DOI: 10.1016/j.jviromet.2018.01.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 01/31/2018] [Accepted: 01/31/2018] [Indexed: 11/23/2022]
Abstract
Plants offer a unique combination of advantages for the production of valuable recombinant proteins in a relatively short time. For instance, a variety of diagnostic tests have been developed that use recombinant antigens expressed in plants. The envelope glycoprotein gp51 encoded by Bovine leukemia virus (BLV) is one of the essential subunits for viral infectivity. It was indicated that the recombinant gp51 (rgp51) of BLV сan be used as an synthetic alternative antigen useful in the diagnosis of BLV infection in cattle. Here we evaluate the potential for using a viral vector based on the genome of Tomato bushy stunt virus (TBSV) for the efficient expression of BLV envelope glycoprotein rgp51 in Nicotiana benthamiana plants. The codon-optimized gene encoding rgp51 was synthesized by the de novo DNA synthesis to replace the GFP gene in the TBSV-derived viral vector that was then delivered into 4-5 week old N. benthamiana plants by agroinfiltration. Expression of recombinant his-tagged rgp51 was verified by protein extraction followed by western blot procedures, and by purification using Ni2+-affinity chromatography. The molecular weight of this plant-expressed rgp51 ranged from 43 to 55 kDa and it was shown to be glycosylated. Important for potential use in diagnostic tests, purified rgp51 specifically reacted with BLV infected bovine sera while no reaction was observed with the negative serum samples.
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Sinclair R, Rosquete MR, Drakakaki G. Post-Golgi Trafficking and Transport of Cell Wall Components. FRONTIERS IN PLANT SCIENCE 2018; 9:1784. [PMID: 30581448 PMCID: PMC6292943 DOI: 10.3389/fpls.2018.01784] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 11/16/2018] [Indexed: 05/13/2023]
Abstract
The cell wall, a complex macromolecular composite structure surrounding and protecting plant cells, is essential for development, signal transduction, and disease resistance. This structure is also integral to cell expansion, as its tensile resistance is the primary balancing mechanism against internal turgor pressure. Throughout these processes, the biosynthesis, transport, deposition, and assembly of cell wall polymers are tightly regulated. The plant endomembrane system facilitates transport of polysaccharides, polysaccharide biosynthetic and modifying enzymes and glycoproteins through vesicle trafficking pathways. Although a number of enzymes involved in cell wall biosynthesis have been identified, comparatively little is known about the transport of cell wall polysaccharides and glycoproteins by the endomembrane system. This review summarizes our current understanding of trafficking of cell wall components during cell growth and cell division. Emerging technologies, such as vesicle glycomics, are also discussed as promising avenues to gain insights into the trafficking of structural polysaccharides to the apoplast.
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Wang X, Chung KP, Lin W, Jiang L. Protein secretion in plants: conventional and unconventional pathways and new techniques. JOURNAL OF EXPERIMENTAL BOTANY 2017; 69:21-37. [PMID: 28992209 DOI: 10.1093/jxb/erx262] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Protein secretion is an essential process in all eukaryotic cells and its mechanisms have been extensively studied. Proteins with an N-terminal leading sequence or transmembrane domain are delivered through the conventional protein secretion (CPS) pathway from the endoplasmic reticulum (ER) to the Golgi apparatus. This feature is conserved in yeast, animals, and plants. In contrast, the transport of leaderless secretory proteins (LSPs) from the cytosol to the cell exterior is accomplished via the unconventional protein secretion (UPS) pathway. So far, the CPS pathway has been well characterized in plants, with several recent studies providing new information about the regulatory mechanisms involved. On the other hand, studies on UPS pathways in plants remain descriptive, although a connection between UPS and the plant defense response is becoming more and more apparent. In this review, we present an update on CPS and UPS. With the emergence of new techniques, a more comprehensive understanding of protein secretion in plants can be expected in the future.
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Affiliation(s)
- Xiangfeng Wang
- State Key Laboratory of Agrobiotechnology, Centre for Cell and Developmental Biology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, China
| | - Kin Pan Chung
- State Key Laboratory of Agrobiotechnology, Centre for Cell and Developmental Biology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, China
| | - Weili Lin
- State Key Laboratory of Agrobiotechnology, Centre for Cell and Developmental Biology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, China
| | - Liwen Jiang
- State Key Laboratory of Agrobiotechnology, Centre for Cell and Developmental Biology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, China
- CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, China
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17
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Brandizzi F. Transport from the endoplasmic reticulum to the Golgi in plants: Where are we now? Semin Cell Dev Biol 2017; 80:94-105. [PMID: 28688928 DOI: 10.1016/j.semcdb.2017.06.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 05/11/2017] [Accepted: 06/27/2017] [Indexed: 11/26/2022]
Abstract
The biogenesis of about one third of the cellular proteome is initiated in the endoplasmic reticulum (ER), which exports proteins to the Golgi apparatus for sorting to their final destination. Notwithstanding the close proximity of the ER with other secretory membranes (e.g., endosomes, plasma membrane), the ER is also important for the homeostasis of non-secretory organelles such as mitochondria, peroxisomes, and chloroplasts. While how the plant ER interacts with most of the non-secretory membranes is largely unknown, the knowledge on the mechanisms for ER-to-Golgi transport is relatively more advanced. Indeed, over the last fifteen years or so, a large number of exciting results have contributed to draw parallels with non-plant species but also to highlight the complexity of the plant ER-Golgi interface, which bears unique features. This review reports and discusses results on plant ER-to-Golgi traffic, focusing mainly on research on COPII-mediated transport in the model species Arabidopsis thaliana.
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Affiliation(s)
- Federica Brandizzi
- MSU-DOE Plant Research Lab and Plant Biology Department, Michigan State University, East Lansing, MI 48824, USA; Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA; Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI 48824, USA.
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18
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Lee MH, Yoo YJ, Kim DH, Hanh NH, Kwon Y, Hwang I. The Prenylated Rab GTPase Receptor PRA1.F4 Contributes to Protein Exit from the Golgi Apparatus. PLANT PHYSIOLOGY 2017; 174:1576-1594. [PMID: 28487479 PMCID: PMC5490915 DOI: 10.1104/pp.17.00466] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 05/04/2017] [Indexed: 05/28/2023]
Abstract
Prenylated Rab acceptor1 (PRA1) functions in the recruitment of prenylated Rab proteins to their cognate organelles. Arabidopsis (Arabidopsis thaliana) contains a large number of proteins belonging to the AtPRA1 family. However, their physiological roles remain largely unknown. Here, we investigated the physiological role of AtPRA1.F4, a member of the AtPRA1 family. A T-DNA insertion knockdown mutant of AtPRA1.F4, atpra1.f4, was smaller in stature than parent plants and possessed shorter roots, whereas transgenic plants overexpressing HA:AtPRA1.F4 showed enhanced development of secondary roots and root hairs. However, both overexpression and knockdown plants exhibited increased sensitivity to high-salt stress, lower vacuolar Na+/K+-ATPase and plasma membrane ATPase activities, lower and higher pH in the vacuole and apoplast, respectively, and highly vesiculated Golgi apparatus. HA:AtPRA1.F4 localized to the Golgi apparatus and assembled into high-molecular-weight complexes. atpra1.f4 plants displayed a defect in vacuolar trafficking, which was complemented by low but not high levels of HA:AtPRA1.F4 Overexpression of HA:AtPRA1.F4 also inhibited protein trafficking at the Golgi apparatus, albeit differentially depending on the final destination or type of protein: trafficking of vacuolar proteins, plasma membrane proteins, and trans-Golgi network (TGN)-localized SYP61 was strongly inhibited; trafficking of TGN-localized SYP51 was slightly inhibited; and trafficking of secretory proteins and TGN-localized SYP41 was negligibly or not significantly inhibited. Based on these results, we propose that Golgi-localized AtPRA1.F4 is involved in the exit of many but not all types of post-Golgi proteins from the Golgi apparatus. Additionally, an appropriate level of AtPRA1.F4 is crucial for its function at the Golgi apparatus.
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Affiliation(s)
- Myoung Hui Lee
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Yun-Joo Yoo
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Dae Heon Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Nguyen Hong Hanh
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Yun Kwon
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Inhwan Hwang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
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19
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Fang L, Ishikawa T, Rennie EA, Murawska GM, Lao J, Yan J, Tsai AYL, Baidoo EEK, Xu J, Keasling JD, Demura T, Kawai-Yamada M, Scheller HV, Mortimer JC. Loss of Inositol Phosphorylceramide Sphingolipid Mannosylation Induces Plant Immune Responses and Reduces Cellulose Content in Arabidopsis. THE PLANT CELL 2016; 28:2991-3004. [PMID: 27895225 PMCID: PMC5240734 DOI: 10.1105/tpc.16.00186] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 11/11/2016] [Accepted: 11/22/2016] [Indexed: 05/03/2023]
Abstract
Glycosylinositol phosphorylceramides (GIPCs) are a class of glycosylated sphingolipids found in plants, fungi, and protozoa. These lipids are abundant in the plant plasma membrane, forming ∼25% of total plasma membrane lipids. Little is known about the function of the glycosylated headgroup, but two recent studies have indicated that they play a key role in plant signaling and defense. Here, we show that a member of glycosyltransferase family 64, previously named ECTOPICALLY PARTING CELLS1, is likely a Golgi-localized GIPC-specific mannosyl-transferase, which we renamed GIPC MANNOSYL-TRANSFERASE1 (GMT1). Sphingolipid analysis revealed that the Arabidopsis thaliana gmt1 mutant almost completely lacks mannose-carrying GIPCs. Heterologous expression of GMT1 in Saccharomyces cerevisiae and tobacco (Nicotiana tabacum) cv Bright Yellow 2 resulted in the production of non-native mannosylated GIPCs. gmt1 displays a severe dwarfed phenotype and a constitutive hypersensitive response characterized by elevated salicylic acid and hydrogen peroxide levels, similar to that we previously reported for the Golgi-localized, GIPC-specific, GDP-Man transporter GONST1 (Mortimer et al., 2013). Unexpectedly, we show that gmt1 cell walls have a reduction in cellulose content, although other matrix polysaccharides are unchanged.
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Affiliation(s)
- Lin Fang
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Toshiki Ishikawa
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Emilie A Rennie
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Gosia M Murawska
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jeemeng Lao
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jingwei Yan
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Alex Yi-Lin Tsai
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Edward E K Baidoo
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jun Xu
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720
| | - Jay D Keasling
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720
| | - Taku Demura
- Cellulose Production Research Team, Biomass Engineering Program, Center for Sustainable Resource Science, RIKEN, Yokohama 230-0045, Japan
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, 630-0192 Nara, Japan
| | - Maki Kawai-Yamada
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Henrik V Scheller
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
- Plant and Microbial Biology, University of California, Berkeley, California 94720
| | - Jenny C Mortimer
- Joint BioEnergy Institute, Emeryville, California 94608
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory, Berkeley, California 94720
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720
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20
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Anderson CT. We be jammin': an update on pectin biosynthesis, trafficking and dynamics. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:495-502. [PMID: 26590862 DOI: 10.1093/jxb/erv501] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Pectins are complex polysaccharides that contain acidic sugars and are major determinants of the cohesion, adhesion, extensibility, porosity and electrostatic potential of plant cell walls. Recent evidence has solidified their positions as key regulators of cellular growth and tissue morphogenesis, although important details of how they achieve this regulation are still missing. Pectins are also hypothesized to function as ligands for wall integrity sensors that enable plant cells to respond to intrinsic defects in wall biomechanics and to wall degradation by attacking pathogens. This update highlights recent advances in our understanding of the biosynthesis of pectins, how they are delivered to the cell surface and become incorporated into the cell wall matrix and how pectins are modified over time in the apoplast. It also poses unanswered questions for further research into this enigmatic but essential class of carbohydrate polymers.
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Affiliation(s)
- Charles T Anderson
- Department of Biology, The Pennsylvania State University, University Park, PA 16802, USA Center for Lignocellulose Structure and Formation, The Pennsylvania State University, University Park, PA 16802, USA
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22
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Lin D, Lopez-Sanchez P, Gidley MJ. Binding of arabinan or galactan during cellulose synthesis is extensive and reversible. Carbohydr Polym 2015; 126:108-21. [DOI: 10.1016/j.carbpol.2015.03.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/05/2015] [Accepted: 03/06/2015] [Indexed: 02/05/2023]
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Generation of Adducts of 4-Hydroxy-2-nonenal with Heat Shock 60 kDa Protein 1 in Human Promyelocytic HL-60 and Monocytic THP-1 Cell Lines. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:296146. [PMID: 26078803 PMCID: PMC4452872 DOI: 10.1155/2015/296146] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 04/20/2015] [Accepted: 04/29/2015] [Indexed: 11/25/2022]
Abstract
Heat shock 60 kDa protein 1 (HSP60) is a chaperone and stress response protein responsible for protein folding and delivery of endogenous peptides to antigen-presenting cells and also a target of autoimmunity implicated in the pathogenesis of atherosclerosis. By two-dimensional electrophoresis and mass spectrometry, we found that exposure of human promyelocytic HL-60 cells to a nontoxic concentration (10 μM) of 4-hydroxy-2-nonenal (HNE) yielded a HSP60 modified with HNE. We also detected adducts of HNE with putative uncharacterized protein CXorf49, the product of an open reading frame identified in various cell and tissue proteomes. Moreover, exposure of human monocytic THP-1 cells differentiated with phorbol 12-myristate 13-acetate to 10 μM HNE, and to light density lipoprotein modified with HNE (HNE-LDL) or by copper-catalyzed oxidation (oxLDL), but not to native LDL, stimulated the formation of HNE adducts with HSP60, as detected by immunoprecipitation and western blot, well over basal levels. The identification of HNE-HSP60 adducts outlines a framework of mutually reinforcing interactions between endothelial cell stressors, like oxLDL and HSP60, whose possible outcomes, such as the amplification of endothelial dysfunction, the spreading of lipoxidative damage to other proteins, such as CXorf49, the activation of antigen-presenting cells, and the breaking of tolerance to HSP60 are discussed.
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Ito Y, Uemura T, Nakano A. Formation and maintenance of the Golgi apparatus in plant cells. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2014; 310:221-87. [PMID: 24725428 DOI: 10.1016/b978-0-12-800180-6.00006-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The Golgi apparatus plays essential roles in intracellular trafficking, protein and lipid modification, and polysaccharide synthesis in eukaryotic cells. It is well known for its unique stacked structure, which is conserved among most eukaryotes. However, the mechanisms of biogenesis and maintenance of the structure, which are deeply related to ER-Golgi and intra-Golgi transport systems, have long been mysterious. Now having extremely powerful microscopic technologies developed for live-cell imaging, the plant Golgi apparatus provides an ideal system to resolve the question. The plant Golgi apparatus has unique features that are not conserved in other kingdoms, which will also give new insights into the Golgi functions in plant life. In this review, we will summarize the features of the plant Golgi apparatus and transport mechanisms around it, with a focus on recent advances in Golgi biogenesis by live imaging of plants cells.
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Affiliation(s)
- Yoko Ito
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Tomohiro Uemura
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Akihiko Nakano
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan; Live Cell Molecular Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama, Japan.
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Kim SJ, Brandizzi F. The plant secretory pathway: an essential factory for building the plant cell wall. PLANT & CELL PHYSIOLOGY 2014; 55:687-93. [PMID: 24401957 DOI: 10.1093/pcp/pct197] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
For building and maintaining the complex structure of the surrounding wall throughout their life, plant cells rely on the endomembrane system, which functions as the main provider and transporter of cell wall constituents. Efforts to understand the mechanisms of synthesis and transport of cell wall materials have been generating valuable information for diverse practical applications. Nonetheless, the identity of the endomembrane components necessary for the transport of cell wall enzymes and polysaccharides is not well known. Evidence indicates that plant cells can accomplish secretion of cell wall constituents through multiple pathways during development or under stress conditions and, that compared with other eukaryotes, they rely on a highly diversified toolkit of proteins for membrane traffic. This suggests that production of the cell wall in plants consists of intricate and highly regulated pathways. In this review, we summarize important discoveries that have allowed the activities of the plant secretory pathway to be linked to the production and deposition of cell wall-synthesizing enzymes and polysaccharides.
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Affiliation(s)
- Sang-Jin Kim
- Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA
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BONFANTE P, PERETTO R. Cell-wall separation during the outgrowth of lateral roots inAllium porrumL. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/j.1438-8677.1993.tb00695.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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CIAMPOLINI F, LI YQ, CRESTI M, CALZONI GL, SPERANZA A. Disorganization of dictyosomes by monensin treatment ofin-vitrogerminated pollen ofMalus domesticaBorkh. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/j.1438-8677.1993.tb00711.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Lunn D, Gaddipati SR, Tucker GA, Lycett GW. Null mutants of individual RABA genes impact the proportion of different cell wall components in stem tissue of Arabidopsis thaliana. PLoS One 2013; 8:e75724. [PMID: 24124508 PMCID: PMC3790814 DOI: 10.1371/journal.pone.0075724] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 08/21/2013] [Indexed: 12/18/2022] Open
Abstract
In Arabidopsis, and other plants, the RABA GTPases (orthologous to the Rab11a of mammals) have expanded in number and diversity and have been shown to belong to eight sub clades, some of which have been implicated in controlling vesicles that traffic cell wall polymers and enzymes that synthesise or modify them to the cell wall. In order to investigate this, we have investigated whether T-DNA insertion knockouts of individual RABA genes belonging to different sub clades, impact on the composition of the plant cell wall. Single gene knockouts of the RABA1, RABA2 and RABA4 sub clades primarily affected the percentage composition of pectin, cellulose and hemicellulose within the cell wall, respectively, despite having no obvious phenotype in the whole plant. We hypothesise that vesicles carrying specific types of cargoes from the Golgi to the cell surface may be regulated by particular sub types of RABA proteins, a finding that could have wider implications for how trafficking systems work and could be a useful tool in cell wall research and other fields of plant biology.
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Affiliation(s)
- Daniel Lunn
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Sanyasi R. Gaddipati
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Gregory A. Tucker
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Grantley W. Lycett
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
- * E-mail:
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Zhou DX, Zheng LY, Qu HX, Yu FH, Zou SS, Hong Y, Tan YX, Wang H, Hu HP, Wang HY. Identification and differential expression of human carcinoma-associated antigens in hepatocellular carcinoma tissues. Exp Biol Med (Maywood) 2013; 238:167-75. [PMID: 23576798 DOI: 10.1177/1535370212474599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
This study was designed to identify and verify hepatocellular carcinoma (HCC)-associated human carcinoma antigens (HCAs) that may be useful as tumor markers for HCC. We found that BCE075 and BCD021 anti-HCA antibodies were immunostained in the liver tissue samples and showed specific staining. Their expression was increased in HCC compared with normal liver tissues (P = 0.008). Immunoprecipitation and mass spectrometry analyses of the proteins precipitated by these two antibodies were identified to be cytoskeleton-associated protein 4 (CLIMP63) and brain-type glycogen phosphorylase (PYGB). This study demonstrated that HCC tissues expressed specific HCA glycoproteins, suggesting that our mouse monoclonal anti-HCA antibodies could be useful for immunohistochemical analysis of HCA expression as potential biomarkers for HCC diagnosis.
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Affiliation(s)
- Dong-Xun Zhou
- Department of Hepatobiliary Disease I, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai 200438, China
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Donohoe BS, Kang BH, Gerl MJ, Gergely ZR, McMichael CM, Bednarek SY, Staehelin LA. Cis-Golgi cisternal assembly and biosynthetic activation occur sequentially in plants and algae. Traffic 2013; 14:551-67. [PMID: 23369235 DOI: 10.1111/tra.12052] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 01/28/2013] [Accepted: 01/31/2013] [Indexed: 12/18/2022]
Abstract
The cisternal progression/maturation model of Golgi trafficking predicts that cis-Golgi cisternae are formed de novo on the cis-side of the Golgi. Here we describe structural and functional intermediates of the cis cisterna assembly process in high-pressure frozen algae (Scherffelia dubia, Chlamydomonas reinhardtii) and plants (Arabidopsis thaliana, Dionaea muscipula; Venus flytrap) as determined by electron microscopy, electron tomography and immuno-electron microscopy techniques. Our findings are as follows: (i) The cis-most (C1) Golgi cisternae are generated de novo from cisterna initiators produced by the fusion of 3-5 COPII vesicles in contact with a C2 cis cisterna. (ii) COPII vesicles fuel the growth of the initiators, which then merge into a coherent C1 cisterna. (iii) When a C1 cisterna nucleates its first cisterna initiator it becomes a C2 cisterna. (iv) C2-Cn cis cisternae grow through COPII vesicle fusion. (v) ER-resident proteins are recycled from cis cisternae to the ER via COPIa-type vesicles. (vi) In S. dubia the C2 cisternae are capable of mediating the self-assembly of scale protein complexes. (vii) In plants, ∼90% of native α-mannosidase I localizes to medial Golgi cisternae. (viii) Biochemical activation of cis cisternae appears to coincide with their conversion to medial cisternae via recycling of medial cisterna enzymes. We propose how the different cis cisterna assembly intermediates of plants and algae may actually be related to those present in the ERGIC and in the pre-cis Golgi cisterna layer in mammalian cells.
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Affiliation(s)
- Bryon S Donohoe
- Molecular Cellular and Developmental Biology, University of Colorado at Boulder, Boulder, CO 80306, USA.
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Xiao C, Anderson CT. Roles of pectin in biomass yield and processing for biofuels. FRONTIERS IN PLANT SCIENCE 2013; 4:67. [PMID: 23543255 PMCID: PMC3608898 DOI: 10.3389/fpls.2013.00067] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 03/10/2013] [Indexed: 05/02/2023]
Abstract
Pectin is a component of the cell walls of plants that is composed of acidic sugar-containing backbones with neutral sugar-containing side chains. It functions in cell adhesion and wall hydration, and pectin crosslinking influences wall porosity and plant morphogenesis. Despite its low abundance in the secondary cell walls that make up the majority of lignocellulosic biomass, recent results have indicated that pectin influences secondary wall formation in addition to its roles in primary wall biosynthesis and modification. This mini-review will examine these and other recent results in the context of biomass yield and digestibility and discuss how these traits might be enhanced by the genetic and molecular modification of pectin. The utility of pectin as a high-value, renewable biomass co-product will also be highlighted.
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Affiliation(s)
- Chaowen Xiao
- Department of Biology, The Pennsylvania State UniversityUniversity Park, PA, USA
- Center for Lignocellulose Structure and Formation, The Pennsylvania State UniversityUniversity Park, PA, USA
| | - Charles T. Anderson
- Department of Biology, The Pennsylvania State UniversityUniversity Park, PA, USA
- Center for Lignocellulose Structure and Formation, The Pennsylvania State UniversityUniversity Park, PA, USA
- *Correspondence: Charles T. Anderson, Department of Biology, The Pennsylvania State University, 201 Huck Life Sciences Building, University Park, PA 16802, USA. e-mail:
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Balestrini R, Ott T, Güther M, Bonfante P, Udvardi MK, De Tullio MC. Ascorbate oxidase: the unexpected involvement of a 'wasteful enzyme' in the symbioses with nitrogen-fixing bacteria and arbuscular mycorrhizal fungi. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2012; 59:71-9. [PMID: 22863656 DOI: 10.1016/j.plaphy.2012.07.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 07/03/2012] [Indexed: 05/20/2023]
Abstract
Ascorbate oxidase (AO, EC 1.10.3.3) catalyzes the oxidation of ascorbate (AsA) to yield water. AO over-expressing plants are prone to ozone and salt stresses, whereas lower expression apparently confers resistance to unfavorable environmental conditions. Previous studies have suggested a role for AO as a regulator of oxygen content in photosynthetic tissues. For the first time we show here that the expression of a Lotus japonicus AO gene is induced in the symbiotic interaction with both nitrogen-fixing bacteria and arbuscular mycorrhizal (AM) fungi. In this framework, high AO expression is viewed as a possible strategy to down-regulate oxygen diffusion in root nodules, and a component of AM symbiosis. A general model of AO function in plants is discussed.
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Sobol MA, Philimonenko VV, Philimonenko AA, Hozák P. Quantitative evaluation of freeze-substitution effects on preservation of nuclear antigens during preparation of biological samples for immunoelectron microscopy. Histochem Cell Biol 2012; 138:167-77. [DOI: 10.1007/s00418-012-0931-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2012] [Indexed: 10/28/2022]
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Metabolic click-labeling with a fucose analog reveals pectin delivery, architecture, and dynamics in Arabidopsis cell walls. Proc Natl Acad Sci U S A 2012; 109:1329-34. [PMID: 22232683 DOI: 10.1073/pnas.1120429109] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Polysaccharide-rich cell walls are a defining feature of plants that influence cell division and growth, but many details of cell-wall organization and dynamics are unknown because of a lack of suitable chemical probes. Metabolic labeling using sugar analogs compatible with click chemistry has the potential to provide new insights into cell-wall structure and dynamics. Using this approach, we found that an alkynylated fucose analog (FucAl) is metabolically incorporated into the cell walls of Arabidopsis thaliana roots and that a significant fraction of the incorporated FucAl is present in pectic rhamnogalacturonan-I (RG-I). Time-course experiments revealed that FucAl-containing RG-I first localizes in cell walls as uniformly distributed punctae that likely mark the sites of vesicle-mediated delivery of new polysaccharides to growing cell walls. In addition, we found that the pattern of incorporated FucAl differs markedly along the developmental gradient of the root. Using pulse-chase experiments, we also discovered that the pectin network is reoriented in elongating root epidermal cells. These results reveal previously undescribed details of polysaccharide delivery, organization, and dynamics in cell walls.
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Driouich A, Follet-Gueye ML, Bernard S, Kousar S, Chevalier L, Vicré-Gibouin M, Lerouxel O. Golgi-mediated synthesis and secretion of matrix polysaccharides of the primary cell wall of higher plants. FRONTIERS IN PLANT SCIENCE 2012; 3:79. [PMID: 22639665 PMCID: PMC3355623 DOI: 10.3389/fpls.2012.00079] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 04/09/2012] [Indexed: 05/17/2023]
Abstract
The Golgi apparatus of eukaryotic cells is known for its central role in the processing, sorting, and transport of proteins to intra- and extra-cellular compartments. In plants, it has the additional task of assembling and exporting the non-cellulosic polysaccharides of the cell wall matrix including pectin and hemicelluloses, which are important for plant development and protection. In this review, we focus on the biosynthesis of complex polysaccharides of the primary cell wall of eudicotyledonous plants. We present and discuss the compartmental organization of the Golgi stacks with regards to complex polysaccharide assembly and secretion using immuno-electron microscopy and specific antibodies recognizing various sugar epitopes. We also discuss the significance of the recently identified Golgi-localized glycosyltransferases responsible for the biosynthesis of xyloglucan (XyG) and pectin.
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Affiliation(s)
- Azeddine Driouich
- Laboratoire ‶Glycobiologie et Matrice Extracellulaire Végétale″, UPRES EA 4358, Institut Federatif de Recherche Multidisciplinaire sur les Peptides, Plate-forme de Recherche en Imagerie Cellulaire de Haute Normandie, Université de RouenMont Saint Aignan, France
- *Correspondence: Azeddine Driouich, Laboratoire “Glycobiologie et Matrice Extracellulaire Végétale” UPRES EA 4358, Institut Federatif de Recherche Multidisciplinaire sur les Peptides, Plate-forme de Recherche en Imagerie Cellulaire de Haute Normandie, Université de Rouen, Rue Tesnière, Bâtiment Henri Gadeau de Kerville, 76821. Mont Saint Aignan, Cedex, France. e-mail:
| | - Marie-Laure Follet-Gueye
- Laboratoire ‶Glycobiologie et Matrice Extracellulaire Végétale″, UPRES EA 4358, Institut Federatif de Recherche Multidisciplinaire sur les Peptides, Plate-forme de Recherche en Imagerie Cellulaire de Haute Normandie, Université de RouenMont Saint Aignan, France
| | - Sophie Bernard
- Laboratoire ‶Glycobiologie et Matrice Extracellulaire Végétale″, UPRES EA 4358, Institut Federatif de Recherche Multidisciplinaire sur les Peptides, Plate-forme de Recherche en Imagerie Cellulaire de Haute Normandie, Université de RouenMont Saint Aignan, France
| | - Sumaira Kousar
- Centre de Recherches sur les Macromolécules végétales–CNRS, Université Joseph FourierGrenoble, France
| | - Laurence Chevalier
- Institut des Matériaux/UMR6634/CNRS, Faculté des Sciences et Techniques, Université de RouenSt. Etienne du Rouvray Cedex, France
| | - Maïté Vicré-Gibouin
- Laboratoire ‶Glycobiologie et Matrice Extracellulaire Végétale″, UPRES EA 4358, Institut Federatif de Recherche Multidisciplinaire sur les Peptides, Plate-forme de Recherche en Imagerie Cellulaire de Haute Normandie, Université de RouenMont Saint Aignan, France
| | - Olivier Lerouxel
- Centre de Recherches sur les Macromolécules végétales–CNRS, Université Joseph FourierGrenoble, France
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Wallace IS, Anderson CT. Small molecule probes for plant cell wall polysaccharide imaging. FRONTIERS IN PLANT SCIENCE 2012; 3:89. [PMID: 22639673 PMCID: PMC3355672 DOI: 10.3389/fpls.2012.00089] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Accepted: 04/19/2012] [Indexed: 05/21/2023]
Abstract
Plant cell walls are composed of interlinked polymer networks consisting of cellulose, hemicelluloses, pectins, proteins, and lignin. The ordered deposition of these components is a dynamic process that critically affects the development and differentiation of plant cells. However, our understanding of cell wall synthesis and remodeling, as well as the diverse cell wall architectures that result from these processes, has been limited by a lack of suitable chemical probes that are compatible with live-cell imaging. In this review, we summarize the currently available molecular toolbox of probes for cell wall polysaccharide imaging in plants, with particular emphasis on recent advances in small molecule-based fluorescent probes. We also discuss the potential for further development of small molecule probes for the analysis of cell wall architecture and dynamics.
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Affiliation(s)
- Ian S. Wallace
- Energy Biosciences Institute, University of CaliforniaBerkeley, CA, USA
- Department of Plant and Microbial Biology, University of CaliforniaBerkeley, CA, USA
| | - Charles T. Anderson
- Department of Biology, The Pennsylvania State UniversityUniversity Park, PA, USA
- *Correspondence: Charles T. Anderson, Department of Biology, The Pennsylvania State University, 201 Life Sciences Building, University Park, PA 16802, USA. e-mail:
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Günl M, Neumetzler L, Kraemer F, de Souza A, Schultink A, Pena M, York WS, Pauly M. AXY8 encodes an α-fucosidase, underscoring the importance of apoplastic metabolism on the fine structure of Arabidopsis cell wall polysaccharides. THE PLANT CELL 2011; 23:4025-40. [PMID: 22080600 PMCID: PMC3246338 DOI: 10.1105/tpc.111.089193] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 10/10/2011] [Accepted: 10/25/2011] [Indexed: 05/18/2023]
Abstract
An Arabidopsis thaliana mutant with an altered structure of its hemicellulose xyloglucan (XyG; axy-8) identified by a forward genetic screen facilitating oligosaccharide mass profiling was characterized. axy8 exhibits increased XyG fucosylation and the occurrence of XyG fragments not present in the wild-type plant. AXY8 was identified to encode an α-fucosidase acting on XyG that was previously designated FUC95A. Green fluorescent protein fusion localization studies and analysis of nascent XyG in microsomal preparations demonstrated that this glycosylhydrolase acts mainly on XyG in the apoplast. Detailed structural analysis of XyG in axy8 gave unique insights into the role of the fucosidase in XyG metabolism in vivo. The genetic evidence indicates that the activity of glycosylhydrolases in the apoplast plays a major role in generating the heterogeneity of XyG side chains in the wall. Furthermore, without the dominant apoplastic glycosylhydrolases, the XyG structure in the wall is mainly composed of XXXG and XXFG subunits.
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Affiliation(s)
- Markus Günl
- University of California, Berkeley, California, 94720
| | - Lutz Neumetzler
- Max-Planck-Institute for Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
| | | | | | | | - Maria Pena
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
| | - William S. York
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
| | - Markus Pauly
- University of California, Berkeley, California, 94720
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40
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Conserved Arabidopsis ECHIDNA protein mediates trans-Golgi-network trafficking and cell elongation. Proc Natl Acad Sci U S A 2011; 108:8048-53. [PMID: 21512130 DOI: 10.1073/pnas.1018371108] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Multiple steps of plant growth and development rely on rapid cell elongation during which secretory and endocytic trafficking via the trans-Golgi network (TGN) plays a central role. Here, we identify the ECHIDNA (ECH) protein from Arabidopsis thaliana as a TGN-localized component crucial for TGN function. ECH partially complements loss of budding yeast TVP23 function and a Populus ECH complements the Arabidopsis ech mutant, suggesting functional conservation of the genes. Compared with wild-type, the Arabidopsis ech mutant exhibits severely perturbed cell elongation as well as defects in TGN structure and function, manifested by the reduced association between Golgi bodies and TGN as well as mislocalization of several TGN-localized proteins including vacuolar H(+)-ATPase subunit a1 (VHA-a1). Strikingly, ech is defective in secretory trafficking, whereas endocytosis appears unaffected in the mutant. Some aspects of the ech mutant phenotype can be phenocopied by treatment with a specific inhibitor of vacuolar H(+)-ATPases, concanamycin A, indicating that mislocalization of VHA-a1 may account for part of the defects in ech. Hence, ECH is an evolutionarily conserved component of the TGN with a central role in TGN structure and function.
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41
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Carpita NC, McCann MC. The maize mixed-linkage (1->3),(1->4)-beta-D-glucan polysaccharide is synthesized at the golgi membrane. PLANT PHYSIOLOGY 2010; 153:1362-71. [PMID: 20488897 PMCID: PMC2899932 DOI: 10.1104/pp.110.156158] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 05/19/2010] [Indexed: 05/18/2023]
Abstract
With the exception of cellulose and callose, the cell wall polysaccharides are synthesized in Golgi membranes, packaged into vesicles, and exported to the plasma membrane where they are integrated into the microfibrillar structure. Consistent with this paradigm, several published reports have shown that the maize (Zea mays) mixed-linkage (1-->3),(1-->4)-beta-D-glucan, a polysaccharide that among angiosperms is unique to the grasses and related Poales species, is synthesized in vitro with isolated maize coleoptile Golgi membranes and the nucleotide-sugar substrate, UDP-glucose. However, a recent study reported the inability to detect the beta-glucan immunocytochemically at the Golgi, resulting in a hypothesis that the mixed-linkage beta-glucan oligomers may be initiated at the Golgi but are polymerized at the plasma membrane surface. Here, we demonstrate that (1-->3),(1-->4)-beta-D-glucans are detected immunocytochemically at the Golgi of the developing maize coleoptiles. Further, when maize seedlings at the third-leaf stage were pulse labeled with [(14)C]O(2) and Golgi membranes were isolated from elongating cells at the base of the developing leaves, (1-->3),(1-->4)-beta-D-glucans of an average molecular mass of 250 kD and higher were detected in isolated Golgi membranes. When the pulse was followed by a chase period, the labeled polysaccharides of the Golgi membrane diminished with subsequent transfer to the cell wall. (1-->3),(1-->4)-beta-D-Glucans of at least 250 kD were isolated from cell walls, but much larger aggregates were also detected, indicating a potential for intermolecular interactions with glucuronoarabinoxylans or intermolecular grafting in muro.
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Affiliation(s)
- Nicholas C Carpita
- Department of Botany and Plant Pathology, Bindley Biosciences Center, Purdue University, West Lafayette, Indiana 47907-2054, USA.
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Viotti C, Bubeck J, Stierhof YD, Krebs M, Langhans M, van den Berg W, van Dongen W, Richter S, Geldner N, Takano J, Jürgens G, de Vries SC, Robinson DG, Schumacher K. Endocytic and secretory traffic in Arabidopsis merge in the trans-Golgi network/early endosome, an independent and highly dynamic organelle. THE PLANT CELL 2010; 22:1344-57. [PMID: 20435907 PMCID: PMC2879741 DOI: 10.1105/tpc.109.072637] [Citation(s) in RCA: 352] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 03/22/2010] [Accepted: 04/09/2010] [Indexed: 05/17/2023]
Abstract
Plants constantly adjust their repertoire of plasma membrane proteins that mediates transduction of environmental and developmental signals as well as transport of ions, nutrients, and hormones. The importance of regulated secretory and endocytic trafficking is becoming increasingly clear; however, our knowledge of the compartments and molecular machinery involved is still fragmentary. We used immunogold electron microscopy and confocal laser scanning microscopy to trace the route of cargo molecules, including the BRASSINOSTEROID INSENSITIVE1 receptor and the REQUIRES HIGH BORON1 boron exporter, throughout the plant endomembrane system. Our results provide evidence that both endocytic and secretory cargo pass through the trans-Golgi network/early endosome (TGN/EE) and demonstrate that cargo in late endosomes/multivesicular bodies is destined for vacuolar degradation. Moreover, using spinning disc microscopy, we show that TGN/EEs move independently and are only transiently associated with an individual Golgi stack.
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Affiliation(s)
- Corrado Viotti
- Department of Cell Biology, Heidelberg Institute for Plant Sciences, University of Heidelberg, 69120 Heidelberg, Germany
| | - Julia Bubeck
- Department of Developmental Biology, Heidelberg Institute for Plant Sciences, University of Heidelberg, 69120 Heidelberg, Germany
| | - York-Dieter Stierhof
- Microscopy Unit, Center for Plant Molecular Biology, University of Tübingen, 72076 Tübingen, Germany
| | - Melanie Krebs
- Department of Developmental Biology, Heidelberg Institute for Plant Sciences, University of Heidelberg, 69120 Heidelberg, Germany
| | - Markus Langhans
- Department of Cell Biology, Heidelberg Institute for Plant Sciences, University of Heidelberg, 69120 Heidelberg, Germany
| | - Willy van den Berg
- Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - Walter van Dongen
- Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - Sandra Richter
- Developmental Genetics, Center for Plant Molecular Biology, University of Tübingen, 72076 Tübingen, Germany
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Junpei Takano
- Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Gerd Jürgens
- Developmental Genetics, Center for Plant Molecular Biology, University of Tübingen, 72076 Tübingen, Germany
| | - Sacco C. de Vries
- Laboratory of Biochemistry, Wageningen University, 6703 HA Wageningen, The Netherlands
| | - David G. Robinson
- Department of Cell Biology, Heidelberg Institute for Plant Sciences, University of Heidelberg, 69120 Heidelberg, Germany
| | - Karin Schumacher
- Department of Developmental Biology, Heidelberg Institute for Plant Sciences, University of Heidelberg, 69120 Heidelberg, Germany
- Address correspondence to
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Abstract
In this chapter, we will discuss methods and protocols for high-pressure freezing (HPF) and freeze substitution (FS) to examine Arabidopsis tissues by transmission electron microscopy (TEM). By use of HPF in combination with FS, it is possible to obtain Arabidopsis samples that are far better preserved for both ultrastructural analysis and immunogold labeling than by conventional chemical fixation. Like other cryofixation methods, ice crystal growth is still a problem in HPF if samples are too thick (> 200 μm) or if their water content is too high. Furthermore, damage done to cells/tissues prior to freezing cannot be "reverted" by HPF. In general, FS of plant tissues is more difficult than that of nonplant tissues because plant cell walls impede removal of water from the enclosed cells as well as from the walls themselves. To overcome these challenges, we describe the details of a HPF, FS, and resin-embedding protocol for Arabidopsis tissues here. In addition, the generation of ribbons of serial sections from Arabidopsis TEM blocks, three-dimensional (3D) analysis of organelle shapes and distribution within the tissue, and immunogold labeling are also explained. The Arabidopsis research community has developed many research tools to investigate gene functions such as knockout mutant lines, antibodies, and transgenic lines expressing epitope-tagged proteins. The TEM techniques explained here have been combined with these tools to elucidate how a particular gene of interest functions in the Arabidopsis cell.
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Affiliation(s)
- Byung-Ho Kang
- Microbiology and Cell Science Department, Electron Microscopy and Bioimaging Lab, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, Florida 32611, USA
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44
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Klepek YS, Volke M, Konrad KR, Wippel K, Hoth S, Hedrich R, Sauer N. Arabidopsis thaliana POLYOL/MONOSACCHARIDE TRANSPORTERS 1 and 2: fructose and xylitol/H+ symporters in pollen and young xylem cells. JOURNAL OF EXPERIMENTAL BOTANY 2010; 61:537-50. [PMID: 19969532 PMCID: PMC2803217 DOI: 10.1093/jxb/erp322] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2009] [Revised: 10/12/2009] [Accepted: 10/19/2009] [Indexed: 05/20/2023]
Abstract
The genome of Arabidopsis thaliana contains six genes, AtPMT1 to AtPMT6 (Arabidopsis thaliana POLYOL/MONOSACCHARIDE TRANSPORTER 1-6), which form a distinct subfamily within the large family of more than 50 monosaccharide transporter-like (MST-like) genes. So far, only AtPMT5 [formerly named AtPLT5 (At3g18830)] has been characterized and was shown to be a plasma membrane-localized H(+)-symporter with broad substrate specificity. The characterization of AtPMT1 (At2g16120) and AtPMT2 (At2g16130), two other, almost identical, members of this transporter subfamily, are presented here. Expression of the AtPMT1 and AtPMT2 cDNAs in baker's yeast (Saccharomyces cerevisiae) revealed that these proteins catalyse the energy-dependent, high-capacity transport of fructose and xylitol, and the transport of several other compounds with lower rates. Expression of their cRNAs in Xenopus laevis oocytes showed that both proteins are voltage-dependent and catalyse the symport of their substrates with protons. Fusions of AtPMT1 or AtPMT2 with the green fluorescent protein (GFP) localized to Arabidopsis plasma membranes. Analyses of reporter genes performed with AtPMT1 or AtPMT2 promoter sequences showed expression in mature (AtPMT2) or germinating (AtPMT1) pollen grains, as well as in growing pollen tubes, hydathodes, and young xylem cells (both genes). The expression was confirmed with an anti-AtPMT1/AtPMT2 antiserum (alphaAtPMT1/2) raised against peptides conserved in AtPMT1 and AtPMT2. The physiological roles of the proteins are discussed and related to plant cell wall modifications.
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Affiliation(s)
- Yvonne-Simone Klepek
- Molekulare Pflanzenphysiologie, Universität Erlangen-Nürnberg, Staudtstrasse 5, D-91058 Erlangen, Germany
| | - Melanie Volke
- Molekulare Pflanzenphysiologie, Universität Erlangen-Nürnberg, Staudtstrasse 5, D-91058 Erlangen, Germany
| | - Kai R. Konrad
- Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl Botanik I, Molekulare Pflanzenphysiologie und Biophysik, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
| | - Kathrin Wippel
- Molekulare Pflanzenphysiologie, Universität Erlangen-Nürnberg, Staudtstrasse 5, D-91058 Erlangen, Germany
| | - Stefan Hoth
- Molekulare Pflanzenphysiologie, Universität Erlangen-Nürnberg, Staudtstrasse 5, D-91058 Erlangen, Germany
| | - Rainer Hedrich
- Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl Botanik I, Molekulare Pflanzenphysiologie und Biophysik, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany
| | - Norbert Sauer
- Molekulare Pflanzenphysiologie, Universität Erlangen-Nürnberg, Staudtstrasse 5, D-91058 Erlangen, Germany
- To whom correspondence should be addressed: E-mail:
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Toyooka K, Matsuoka K. Exo- and endocytotic trafficking of SCAMP2. PLANT SIGNALING & BEHAVIOR 2009; 4:1196-8. [PMID: 20514246 PMCID: PMC2819456 DOI: 10.4161/psb.4.12.10075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 09/14/2009] [Accepted: 09/14/2009] [Indexed: 05/24/2023]
Abstract
Exo- and endocytotic membrane trafficking is an essential process for transport of secretory proteins, extracellular glycans, transporters and lipids in plant cells. Using secretory carrier membrane protein 2 (SCAMP2) as a marker for secretory vesicles and tobacco BY-2 cells as a model system, we recently demonstrated that SCAMP2 positive structures containing secretory materials are transported from the Golgi apparatus to the plasma membrane (PM) and/or cell plate. This structure is consisted with clustered vesicles and was thus named the secretory vesicle cluster (SVC). Here, we have utilized the reversible photoswitching fluorescent protein Dronpa1 to trace the movement of SCAMP2 on the PM and cell plate. Activated SCAMP2-Dronpa fluorescence on the PM and cell plate moved into the BY-2 cells within several minutes, but did not spread around PM. This is consistent with recycling of SCAMP2 among endomembrane compartments such as the TGN, PM and cell plate. The relationship between SVC-mediated trafficking and exo- and endocytosis of plant cells is discussed taking into account this new data and knowledge provided by recent reports.
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Affiliation(s)
| | - Ken Matsuoka
- RIKEN Plant Science Center, Tsurumi-ku, Yokohama Japan
- Laboratory of Plant Nutrition; Faculty of Agriculture; Kyushu University, Higashi-ku, Fukuoka Japan
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de O Buanafina MM. Feruloylation in grasses: current and future perspectives. MOLECULAR PLANT 2009; 2:861-72. [PMID: 19825663 DOI: 10.1093/mp/ssp067] [Citation(s) in RCA: 212] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
In the cell walls of forage grasses, ferulic acid is esterified to arabinoxylans and participates with lignin monomers in oxidative coupling pathways to generate ferulate-polysaccharide-lignin complexes that cross-link the cell wall. The accumulation of ferulates and the cross-linking of arabinoxylans via diferulate esters are hypothesized to function in various processes in plants. The specific roles of arabinoxylan feruloylation as well as the nature, cellular localization, and substrate for arabinoxylans feruloylation of cell walls are reviewed. The various approaches that have been used for assessing the specific roles of feruloylation are described and assessed. I argue that, until recently, the specific role of feruloylation in these various processes has been established largely by indirect experiments and, although these studies reached similar conclusions about the potential importance of wall feruloylation, they suffer from a common problem: namely they depend on correlations between two processes and do not stem from a detailed understanding of the mechanisms of feruloylation. I also argue that the nature of arabinoxylan feruloylation remains uncertain.
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Affiliation(s)
- Marcia M de O Buanafina
- Department of Biology, 208 Mueller Laboratory, Pennsylvania University, University Park, PA 16802, USA.
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Exposure of HL-60 human leukaemic cells to 4-hydroxynonenal promotes the formation of adduct(s) with alpha-enolase devoid of plasminogen binding activity. Biochem J 2009; 422:285-94. [PMID: 19508232 DOI: 10.1042/bj20090564] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
HNE (4-hydroxynonenal), the major product of lipoperoxidation, easily reacts with proteins through adduct formation between its three main functional groups and lysyl, histidyl and cysteinyl residues of proteins. HNE is considered to be an ultimate mediator of toxic effects elicited by oxidative stress. It can be detected in several patho-physiological conditions, in which it affects cellular processes by addition to functional proteins. We demonstrated in the present study, by MS and confirmed by immunoblotting experiments, the formation of HNE-alpha-enolase adduct(s) in HL-60 human leukaemic cells. Alpha-enolase is a multifunctional protein that acts as a glycolytic enzyme, transcription factor [MBP-1 (c-myc binding protein-1)] and plasminogen receptor. HNE did not affect alpha-enolase enzymatic activity, expression or intracellular localization, and did not change the expression and localization of MBP-1 either. Confocal and electronic microscopy results confirmed the plasma membrane, cytosolic and nuclear localization of alpha-enolase in HL-60 cells and demonstrated that HNE was colocalized with alpha-enolase at the surface of cells early after its addition. HNE caused a dose- and time-dependent reduction of the binding of plasminogen to alpha-enolase. As a consequence, HNE reduced adhesion of HL-60 cells to HUVECs (human umbilical vein endothelial cells). These results could suggest a new role for HNE in the control of tumour growth and invasion.
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48
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Caffall KH, Mohnen D. The structure, function, and biosynthesis of plant cell wall pectic polysaccharides. Carbohydr Res 2009; 344:1879-900. [PMID: 19616198 DOI: 10.1016/j.carres.2009.05.021] [Citation(s) in RCA: 947] [Impact Index Per Article: 63.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Revised: 05/04/2009] [Accepted: 05/06/2009] [Indexed: 11/15/2022]
Abstract
Plant cell walls consist of carbohydrate, protein, and aromatic compounds and are essential to the proper growth and development of plants. The carbohydrate components make up approximately 90% of the primary wall, and are critical to wall function. There is a diversity of polysaccharides that make up the wall and that are classified as one of three types: cellulose, hemicellulose, or pectin. The pectins, which are most abundant in the plant primary cell walls and the middle lamellae, are a class of molecules defined by the presence of galacturonic acid. The pectic polysaccharides include the galacturonans (homogalacturonan, substituted galacturonans, and RG-II) and rhamnogalacturonan-I. Galacturonans have a backbone that consists of alpha-1,4-linked galacturonic acid. The identification of glycosyltransferases involved in pectin synthesis is essential to the study of cell wall function in plant growth and development and for maximizing the value and use of plant polysaccharides in industry and human health. A detailed synopsis of the existing literature on pectin structure, function, and biosynthesis is presented.
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Affiliation(s)
- Kerry Hosmer Caffall
- University of Georgia, Department of Biochemistry and Molecular Biology and Complex Carbohydrate Research Center, Athens, 30602, United States
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Boyer JS. Cell wall biosynthesis and the molecular mechanism of plant enlargement. FUNCTIONAL PLANT BIOLOGY : FPB 2009; 36:383-394. [PMID: 32688655 DOI: 10.1071/fp09048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Accepted: 03/24/2009] [Indexed: 05/06/2023]
Abstract
Recently discovered reactions allow the green alga Chara corallina (Klien ex. Willd., em. R.D.W.) to grow well without the benefit of xyloglucan or rhamnogalactan II in its cell wall. Growth rates are controlled by polygalacturonic acid (pectate) bound with calcium in the primary wall, and the reactions remove calcium from these bonds when new pectate is supplied. The removal appears to occur preferentially in bonds distorted by wall tension produced by the turgor pressure (P). The loss of calcium accelerates irreversible wall extension if P is above a critical level. The new pectate (now calcium pectate) then binds to the wall and decelerates wall extension, depositing new wall material on and within the old wall. Together, these reactions create a non-enzymatic but stoichiometric link between wall growth and wall deposition. In green plants, pectate is one of the most conserved components of the primary wall, and it is therefore proposed that the acceleration-deceleration-wall deposition reactions are of wide occurrence likely to underlie growth in virtually all green plants. C. corallina is one of the closest relatives of the progenitors of terrestrial plants, and this review focuses on the pectate reactions and how they may fit existing theories of plant growth.
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Affiliation(s)
- John S Boyer
- College of Marine and Earth Studies and College of Agriculture and Natural Resources, University of Delaware, Lewes, DE 19958, USA. Email
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Staehelin LA, Kang BH. Nanoscale architecture of endoplasmic reticulum export sites and of Golgi membranes as determined by electron tomography. PLANT PHYSIOLOGY 2008; 147:1454-68. [PMID: 18678738 PMCID: PMC2492626 DOI: 10.1104/pp.108.120618] [Citation(s) in RCA: 138] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Affiliation(s)
- L Andrew Staehelin
- Molecular Cellular and Developmental Biology, University of Colorado, Boulder, Colorado 80309, USA
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