1
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Hao GJ, Ying J, Li LS, Yu F, Dun SS, Su LY, Zhao XY, Li S, Zhang Y. Two functionally interchangeable Vps9 isoforms mediate pollen tube penetration of style. THE NEW PHYTOLOGIST 2024; 244:840-854. [PMID: 39262026 DOI: 10.1111/nph.20088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 08/07/2024] [Indexed: 09/13/2024]
Abstract
Style penetration by pollen tubes is essential for reproductive success, a process requiring canonical Rab5s in Arabidopsis. However, functional loss of Arabidopsis Vps9a, the gene encoding for guanine nucleotide exchange factor (GEF) of Rab5s, did not affect male transmission, implying the presence of a compensation program or redundancy. By combining genetic, cytological, and molecular approaches, we report that Arabidopsis Vps9b is a pollen-preferential gene, redundantly mediating pollen tube penetration of style with Vps9a. Vps9b is functionally interchangeable with Vps9a, whose functional distinction results from distinct expression profiles. Functional loss of Vps9a and Vps9b results in the mis-targeting of Rab5-dependent tonoplast proteins, defective vacuolar biogenesis, disturbed distribution of post-Golgi vesicles, increased cellular turgor, cytosolic acidification, and disrupted organization of actin microfilaments (MF) in pollen tubes, which collectively lead to the failure of pollen tubes to grow through style.
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Affiliation(s)
- Guang-Jiu Hao
- Frontiers Science Center for Cell Responses, College of Life Sciences, Nankai University, Tian'jin, 300017, China
| | - Jun Ying
- College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Lu-Shen Li
- Frontiers Science Center for Cell Responses, College of Life Sciences, Nankai University, Tian'jin, 300017, China
| | - Fei Yu
- College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Shan-Shan Dun
- College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Le-Yan Su
- College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Xin-Ying Zhao
- College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Sha Li
- College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Yan Zhang
- Frontiers Science Center for Cell Responses, College of Life Sciences, Nankai University, Tian'jin, 300017, China
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2
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Ma L, Yuan J, Qin H, Zhang M, Zhang F, Yu F, Tian Z, Wang G. GmMATE100 Is Involved in the Import of Soyasaponins A and B into Vacuoles in Soybean Plants ( Glycine max L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:9994-10004. [PMID: 38648468 DOI: 10.1021/acs.jafc.4c01774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Triterpenoid saponins, synthesized via the mevalonic acid (MVA) pathway in the cytoplasm, provide protection against pathogens and pests in plants and health benefits for humans. However, the mechanisms by which triterpenoid saponins are transported between cellular compartments remain uncharacterized. Here, we characterize a tonoplast localized multidrug and toxic compound extrusion transporter, GmMATE100 (encoded by Glyma.18G143700), from soybean (Glycine max L.). GmMATE100 is co-expressed with soyasaponin biosynthetic genes, and its expression was induced by MeJA treatment, which also led to soyasaponin accumulation in soybean roots. GmMATE100 efficiently transports multiple type-B soyasaponins as well as type-A soyasaponins with low affinity from the cytosol to the vacuole in a yeast system. The GmMATE100 loss-of-function mutant showed a significant decrease in type-A and type-B soyasaponin contents in soybean roots. This study not only characterized the first soybean triterpenoid saponin transporter but also provided new knowledge for the rational engineering of soyasaponin content and composition in soybean plants to modulate their levels within crop environments.
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Affiliation(s)
- Liya Ma
- Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Jia Yuan
- Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Hao Qin
- Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Mengxia Zhang
- School of Biological Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, People's Republic of China
| | - Fengxia Zhang
- Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Fang Yu
- School of Biological Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, People's Republic of China
| | - Zhixi Tian
- Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Guodong Wang
- Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China
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3
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Testi S, Kuhn ML, Allasia V, Auroy P, Kong F, Peltier G, Pagnotta S, Cazareth J, Keller H, Panabières F. The Phytophthora parasitica effector AVH195 interacts with ATG8, attenuates host autophagy, and promotes biotrophic infection. BMC Biol 2024; 22:100. [PMID: 38679707 PMCID: PMC11057187 DOI: 10.1186/s12915-024-01899-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/22/2024] [Indexed: 05/01/2024] Open
Abstract
BACKGROUND Plant pathogens secrete effector proteins into host cells to suppress immune responses and manipulate fundamental cellular processes. One of these processes is autophagy, an essential recycling mechanism in eukaryotic cells that coordinates the turnover of cellular components and contributes to the decision on cell death or survival. RESULTS We report the characterization of AVH195, an effector from the broad-spectrum oomycete plant pathogen, Phytophthora parasitica. We show that P. parasitica expresses AVH195 during the biotrophic phase of plant infection, i.e., the initial phase in which host cells are maintained alive. In tobacco, the effector prevents the initiation of cell death, which is caused by two pathogen-derived effectors and the proapoptotic BAX protein. AVH195 associates with the plant vacuolar membrane system and interacts with Autophagy-related protein 8 (ATG8) isoforms/paralogs. When expressed in cells from the green alga, Chlamydomonas reinhardtii, the effector delays vacuolar fusion and cargo turnover upon stimulation of autophagy, but does not affect algal viability. In Arabidopsis thaliana, AVH195 delays the turnover of ATG8 from endomembranes and promotes plant susceptibility to P. parasitica and the obligate biotrophic oomycete pathogen Hyaloperonospora arabidopsidis. CONCLUSIONS Taken together, our observations suggest that AVH195 targets ATG8 to attenuate autophagy and prevent associated host cell death, thereby favoring biotrophy during the early stages of the infection process.
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Affiliation(s)
- Serena Testi
- Université Côte d'Azur, INRAE, CNRS, Institut Sophia Agrobiotech, 06903, Sophia Antipolis, France
- Present Address: Station Biologique de Roscoff, UMR8227 LBI2M, CNRS-Sorbonne Unversité, 29680, Roscoff, France
| | - Marie-Line Kuhn
- Université Côte d'Azur, INRAE, CNRS, Institut Sophia Agrobiotech, 06903, Sophia Antipolis, France
| | - Valérie Allasia
- Université Côte d'Azur, INRAE, CNRS, Institut Sophia Agrobiotech, 06903, Sophia Antipolis, France
| | - Pascaline Auroy
- Aix Marseille Université, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, 13108, Saint Paul-Lez-Durance, France
| | - Fantao Kong
- Aix Marseille Université, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, 13108, Saint Paul-Lez-Durance, France
- Present address: School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Gilles Peltier
- Aix Marseille Université, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache, 13108, Saint Paul-Lez-Durance, France
| | - Sophie Pagnotta
- Université Côte d'Azur, Centre Commun de Microscopie Appliquée, 06108, Nice, France
| | - Julie Cazareth
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, 06903, Sophia Antipolis, France
| | - Harald Keller
- Université Côte d'Azur, INRAE, CNRS, Institut Sophia Agrobiotech, 06903, Sophia Antipolis, France.
| | - Franck Panabières
- Université Côte d'Azur, INRAE, CNRS, Institut Sophia Agrobiotech, 06903, Sophia Antipolis, France
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4
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Khan A, Cheng J, Kitashova A, Fürtauer L, Nägele T, Picco C, Scholz-Starke J, Keller I, Neuhaus HE, Pommerrenig B. Vacuolar sugar transporter EARLY RESPONSE TO DEHYDRATION6-LIKE4 affects fructose signaling and plant growth. PLANT PHYSIOLOGY 2023; 193:2141-2163. [PMID: 37427783 DOI: 10.1093/plphys/kiad403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 06/02/2023] [Accepted: 06/11/2023] [Indexed: 07/11/2023]
Abstract
Regulation of intracellular sugar homeostasis is maintained by regulation of activities of sugar import and export proteins residing at the tonoplast. We show here that the EARLY RESPONSE TO DEHYDRATION6-LIKE4 (ERDL4) protein, a member of the monosaccharide transporter family, resides in the vacuolar membrane in Arabidopsis (Arabidopsis thaliana). Gene expression and subcellular fractionation studies indicated that ERDL4 participates in fructose allocation across the tonoplast. Overexpression of ERDL4 increased total sugar levels in leaves due to a concomitantly induced stimulation of TONOPLAST SUGAR TRANSPORTER 2 (TST2) expression, coding for the major vacuolar sugar loader. This conclusion is supported by the finding that tst1-2 knockout lines overexpressing ERDL4 lack increased cellular sugar levels. ERDL4 activity contributing to the coordination of cellular sugar homeostasis is also indicated by 2 further observations. First, ERDL4 and TST genes exhibit an opposite regulation during a diurnal rhythm, and second, the ERDL4 gene is markedly expressed during cold acclimation, representing a situation in which TST activity needs to be upregulated. Moreover, ERDL4-overexpressing plants show larger rosettes and roots, a delayed flowering time, and increased total seed yield. Consistently, erdl4 knockout plants show impaired cold acclimation and freezing tolerance along with reduced plant biomass. In summary, we show that modification of cytosolic fructose levels influences plant organ development and stress tolerance.
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Affiliation(s)
- Azkia Khan
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| | - Jintao Cheng
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University and Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan 430070, China
| | - Anastasia Kitashova
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians- Universität München, D-82152 Planegg-Martinsried, Germany
| | - Lisa Fürtauer
- Institute for Biology III, Unit of Plant Molecular Systems Biology, RWTH Aachen University, Aachen, Germany
| | - Thomas Nägele
- Plant Evolutionary Cell Biology, Faculty of Biology, Ludwig-Maximilians- Universität München, D-82152 Planegg-Martinsried, Germany
| | - Cristiana Picco
- Institute of Biophysics, Consiglio Nazionale delle Ricerche (CNR), Via De Marini 6, I-16149 Genova, Italy
| | - Joachim Scholz-Starke
- Institute of Biophysics, Consiglio Nazionale delle Ricerche (CNR), Via De Marini 6, I-16149 Genova, Italy
| | - Isabel Keller
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| | - H Ekkehard Neuhaus
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
| | - Benjamin Pommerrenig
- Plant Physiology, RPTU Kaiserslautern-Landau, Paul-Ehrlich Straße 22, D-67653 Kaiserslautern, Germany
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5
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Wang P, Siao W, Zhao X, Arora D, Wang R, Eeckhout D, Van Leene J, Kumar R, Houbaert A, De Winne N, Mylle E, Vandorpe M, Korver RA, Testerink C, Gevaert K, Vanneste S, De Jaeger G, Van Damme D, Russinova E. Adaptor protein complex interaction map in Arabidopsis identifies P34 as a common stability regulator. NATURE PLANTS 2023; 9:355-371. [PMID: 36635451 PMCID: PMC7615410 DOI: 10.1038/s41477-022-01328-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Adaptor protein (AP) complexes are evolutionarily conserved vesicle transport regulators that recruit coat proteins, membrane cargoes and coated vesicle accessory proteins. As in plants endocytic and post-Golgi trafficking intersect at the trans-Golgi network, unique mechanisms for sorting cargoes of overlapping vesicular routes are anticipated. The plant AP complexes are part of the sorting machinery, but despite some functional information, their cargoes, accessory proteins and regulation remain largely unknown. Here, by means of various proteomics approaches, we generated the overall interactome of the five AP and the TPLATE complexes in Arabidopsis thaliana. The interactome converged on a number of hub proteins, including the thus far unknown adaptin binding-like protein, designated P34. P34 interacted with the clathrin-associated AP complexes, controlled their stability and, subsequently, influenced clathrin-mediated endocytosis and various post-Golgi trafficking routes. Altogether, the AP interactome network offers substantial resources for further discoveries of unknown endomembrane trafficking regulators in plant cells.
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Affiliation(s)
- Peng Wang
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Wei Siao
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.
- Center for Plant Systems Biology, VIB, Ghent, Belgium.
| | - Xiuyang Zhao
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Deepanksha Arora
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Ren Wang
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Dominique Eeckhout
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Jelle Van Leene
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Rahul Kumar
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
- Department of Plant Sciences, University of Hyderabad, Hyderabad, India
| | - Anaxi Houbaert
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Nancy De Winne
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Evelien Mylle
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Michael Vandorpe
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Ruud A Korver
- Plant Physiology and Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, the Netherlands
| | - Christa Testerink
- Plant Physiology and Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, the Netherlands
- Laboratory of Plant Physiology, Wageningen University & Research, Wageningen, the Netherlands
| | - Kris Gevaert
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Center for Medical Biotechnology, VIB, Ghent, Belgium
| | - Steffen Vanneste
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Geert De Jaeger
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Daniël Van Damme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Eugenia Russinova
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.
- Center for Plant Systems Biology, VIB, Ghent, Belgium.
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6
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Lv QY, Han ML, Gao YQ, Zhang CY, Wang YL, Chao ZF, Zhong LY, Chao DY. Sec24C mediates a Golgi-independent trafficking pathway that is required for tonoplast localisation of ABCC1 and ABCC2. THE NEW PHYTOLOGIST 2022; 235:1486-1500. [PMID: 35510797 DOI: 10.1111/nph.18201] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
Protein sorting is an essential biological process in all organisms. Trafficking membrane proteins generally relies on the sorting machinery of the Golgi apparatus. However, many proteins have been found to be delivered to target locations via Golgi-independent pathways, but the mechanisms underlying this delivery system remain unknown. Here, we report that Sec24C mediates the direct secretory trafficking of the phytochelatin transporters ABCC1 and ABCC2 from the endoplasmic reticulum (ER) to prevacuolar compartments (PVCs) in Arabidopsis thaliana. Genetic analysis showed that the sec24c mutants are hypersensitive to cadmium (Cd) and arsenic (As) treatments due to mislocalisation of ABCC1 and ABCC2, which results in defects in the vacuole compartmentalisation of the toxic metals. Furthermore, we found that Sec24C recognises ABCC1 and ABCC2 through direct interactions to mediate their exit from the ER to PVCs, which is independent of brefeldin A-sensitive post-Golgi trafficking pathway. These findings expand our understanding of Golgi-independent trafficking, which also provide key insights regarding the mechanism of tonoplast protein sorting and open a new perspective on the function of Sec24 proteins.
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Affiliation(s)
- Qiao-Yan Lv
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mei-Ling Han
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Yi-Qun Gao
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Chu-Ying Zhang
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- School of Life Science, Henan University, Kaifeng, 475000, China
| | - Ya-Ling Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Zhen-Fei Chao
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Li-Yuan Zhong
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dai-Yin Chao
- National Key Laboratory of Plant Molecular Genetics, CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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7
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Dahhan DA, Reynolds GD, Cárdenas JJ, Eeckhout D, Johnson A, Yperman K, Kaufmann WA, Vang N, Yan X, Hwang I, Heese A, De Jaeger G, Friml J, Van Damme D, Pan J, Bednarek SY. Proteomic characterization of isolated Arabidopsis clathrin-coated vesicles reveals evolutionarily conserved and plant-specific components. THE PLANT CELL 2022; 34:2150-2173. [PMID: 35218346 PMCID: PMC9134090 DOI: 10.1093/plcell/koac071] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/22/2022] [Indexed: 05/26/2023]
Abstract
In eukaryotes, clathrin-coated vesicles (CCVs) facilitate the internalization of material from the cell surface as well as the movement of cargo in post-Golgi trafficking pathways. This diversity of functions is partially provided by multiple monomeric and multimeric clathrin adaptor complexes that provide compartment and cargo selectivity. The adaptor-protein assembly polypeptide-1 (AP-1) complex operates as part of the secretory pathway at the trans-Golgi network (TGN), while the AP-2 complex and the TPLATE complex jointly operate at the plasma membrane to execute clathrin-mediated endocytosis. Key to our further understanding of clathrin-mediated trafficking in plants will be the comprehensive identification and characterization of the network of evolutionarily conserved and plant-specific core and accessory machinery involved in the formation and targeting of CCVs. To facilitate these studies, we have analyzed the proteome of enriched TGN/early endosome-derived and endocytic CCVs isolated from dividing and expanding suspension-cultured Arabidopsis (Arabidopsis thaliana) cells. Tandem mass spectrometry analysis results were validated by differential chemical labeling experiments to identify proteins co-enriching with CCVs. Proteins enriched in CCVs included previously characterized CCV components and cargos such as the vacuolar sorting receptors in addition to conserved and plant-specific components whose function in clathrin-mediated trafficking has not been previously defined. Notably, in addition to AP-1 and AP-2, all subunits of the AP-4 complex, but not AP-3 or AP-5, were found to be in high abundance in the CCV proteome. The association of AP-4 with suspension-cultured Arabidopsis CCVs is further supported via additional biochemical data.
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Affiliation(s)
| | | | - Jessica J Cárdenas
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Dominique Eeckhout
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Alexander Johnson
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | | | - Walter A Kaufmann
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Nou Vang
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Xu Yan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Inhwan Hwang
- Department of Life Sciences, Pohang University of Science & Technology, Pohang 37673, Korea
| | - Antje Heese
- Division of Biochemistry, Interdisciplinary Plant Group, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Geert De Jaeger
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jiří Friml
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Daniël Van Damme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jianwei Pan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
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8
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Dahhan DA, Reynolds GD, Cárdenas JJ, Eeckhout D, Johnson A, Yperman K, Kaufmann WA, Vang N, Yan X, Hwang I, Heese A, De Jaeger G, Friml J, Van Damme D, Pan J, Bednarek SY. Proteomic characterization of isolated Arabidopsis clathrin-coated vesicles reveals evolutionarily conserved and plant-specific components. THE PLANT CELL 2022; 34:2150-2173. [PMID: 35218346 DOI: 10.1101/2021.09.16.460678] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/22/2022] [Indexed: 05/26/2023]
Abstract
In eukaryotes, clathrin-coated vesicles (CCVs) facilitate the internalization of material from the cell surface as well as the movement of cargo in post-Golgi trafficking pathways. This diversity of functions is partially provided by multiple monomeric and multimeric clathrin adaptor complexes that provide compartment and cargo selectivity. The adaptor-protein assembly polypeptide-1 (AP-1) complex operates as part of the secretory pathway at the trans-Golgi network (TGN), while the AP-2 complex and the TPLATE complex jointly operate at the plasma membrane to execute clathrin-mediated endocytosis. Key to our further understanding of clathrin-mediated trafficking in plants will be the comprehensive identification and characterization of the network of evolutionarily conserved and plant-specific core and accessory machinery involved in the formation and targeting of CCVs. To facilitate these studies, we have analyzed the proteome of enriched TGN/early endosome-derived and endocytic CCVs isolated from dividing and expanding suspension-cultured Arabidopsis (Arabidopsis thaliana) cells. Tandem mass spectrometry analysis results were validated by differential chemical labeling experiments to identify proteins co-enriching with CCVs. Proteins enriched in CCVs included previously characterized CCV components and cargos such as the vacuolar sorting receptors in addition to conserved and plant-specific components whose function in clathrin-mediated trafficking has not been previously defined. Notably, in addition to AP-1 and AP-2, all subunits of the AP-4 complex, but not AP-3 or AP-5, were found to be in high abundance in the CCV proteome. The association of AP-4 with suspension-cultured Arabidopsis CCVs is further supported via additional biochemical data.
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Affiliation(s)
- Dana A Dahhan
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Gregory D Reynolds
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Jessica J Cárdenas
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Dominique Eeckhout
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Alexander Johnson
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Klaas Yperman
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Walter A Kaufmann
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Nou Vang
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Xu Yan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Inhwan Hwang
- Department of Life Sciences, Pohang University of Science & Technology, Pohang 37673, Korea
| | - Antje Heese
- Division of Biochemistry, Interdisciplinary Plant Group, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Geert De Jaeger
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jiří Friml
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Daniël Van Damme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jianwei Pan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Sebastian Y Bednarek
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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9
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Zhou Y, Sun M, Sun P, Gao H, Yang H, Jing Y, Hussain MA, Saxena RK, Carther FI, Wang Q, Li H. Tonoplast inositol transporters: Roles in plant abiotic stress response and crosstalk with other signals. JOURNAL OF PLANT PHYSIOLOGY 2022; 271:153660. [PMID: 35240513 DOI: 10.1016/j.jplph.2022.153660] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 02/22/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
Inositol transporters (INT) are thought to be the pivotal transporters for vital metabolites, in particular lipids, minerals, and sugars. These transporters play an important role in transitional metabolism and various signaling pathways in plants through regulating the transduction of messages from hormones, neurotransmitters, and immunologic and growth factors. Extensive studies have been conducted on animal INT, with promising outcomes. However, only few recent studies have highlighted the importance and complexity of INT genes in the regulation of plant physiology stages, including growth and tolerance to stress conditions. The present review summarizes the most recent findings concerning the role of INT or inositol genes in plant metabolism and the response mechanisms triggered by external stressors. Moreover, we highlight the emerging role of vacuoles and vacuolar INT in plant molecular transition and their related roles in plant growth and development. INTs are the essential mediators of inositol uptake and its intracellular broadcasting for various metabolic pathways where they play crucial roles. Additionally, we report evidence on Na+/inositol transporters, which until now have only been characterized in animals, as well as H+/inositol symporters and their kinetic functions and physiological role and suggest their roles and operating mode in plants. A more comprehensive understanding of the INT functioning system, in particular the coordinated movement of inositol and the relation between inositol generation and other important plant signaling pathways, would greatly advance the study of plant stress adaptation.
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Affiliation(s)
- Yonggang Zhou
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Monan Sun
- College of Plant Science, Jilin University, Changchun, 130062, China.
| | - Pengyu Sun
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Hongtao Gao
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - He Yang
- RDFZ Sanya School, Sanya, 572025, China.
| | - Yan Jing
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Muhammad Azhar Hussain
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Rachit K Saxena
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, 502324, India.
| | - Foka Idrice Carther
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Qingyu Wang
- College of Plant Science, Jilin University, Changchun, 130062, China.
| | - Haiyan Li
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
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10
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Hao G, Zhao X, Zhang M, Ying J, Yu F, Li S, Zhang Y. Vesicle trafficking in
Arabidopsis
pollen tubes. FEBS Lett 2022; 596:2231-2242. [DOI: 10.1002/1873-3468.14343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/08/2022] [Accepted: 03/08/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Guang‐Jiu Hao
- State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Tai’an, Shandong China
| | - Xin‐Ying Zhao
- State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Tai’an, Shandong China
| | | | - Jun Ying
- State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Tai’an, Shandong China
| | - Fei Yu
- State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Tai’an, Shandong China
| | - Sha Li
- State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Tai’an, Shandong China
| | - Yan Zhang
- State Key Laboratory of Crop Biology College of Life Sciences Shandong Agricultural University Tai’an, Shandong China
- College of Life Sciences Nankai University China
- Frontiers Science Center for Cell Responses Nankai University China
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11
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Current Methods to Unravel the Functional Properties of Lysosomal Ion Channels and Transporters. Cells 2022; 11:cells11060921. [PMID: 35326372 PMCID: PMC8946281 DOI: 10.3390/cells11060921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 02/07/2023] Open
Abstract
A distinct set of channels and transporters regulates the ion fluxes across the lysosomal membrane. Malfunctioning of these transport proteins and the resulting ionic imbalance is involved in various human diseases, such as lysosomal storage disorders, cancer, as well as metabolic and neurodegenerative diseases. As a consequence, these proteins have stimulated strong interest for their suitability as possible drug targets. A detailed functional characterization of many lysosomal channels and transporters is lacking, mainly due to technical difficulties in applying the standard patch-clamp technique to these small intracellular compartments. In this review, we focus on current methods used to unravel the functional properties of lysosomal ion channels and transporters, stressing their advantages and disadvantages and evaluating their fields of applicability.
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12
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Aniento F, Sánchez de Medina Hernández V, Dagdas Y, Rojas-Pierce M, Russinova E. Molecular mechanisms of endomembrane trafficking in plants. THE PLANT CELL 2022; 34:146-173. [PMID: 34550393 PMCID: PMC8773984 DOI: 10.1093/plcell/koab235] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/12/2021] [Indexed: 05/10/2023]
Abstract
Endomembrane trafficking is essential for all eukaryotic cells. The best-characterized membrane trafficking organelles include the endoplasmic reticulum (ER), Golgi apparatus, early and recycling endosomes, multivesicular body, or late endosome, lysosome/vacuole, and plasma membrane. Although historically plants have given rise to cell biology, our understanding of membrane trafficking has mainly been shaped by the much more studied mammalian and yeast models. Whereas organelles and major protein families that regulate endomembrane trafficking are largely conserved across all eukaryotes, exciting variations are emerging from advances in plant cell biology research. In this review, we summarize the current state of knowledge on plant endomembrane trafficking, with a focus on four distinct trafficking pathways: ER-to-Golgi transport, endocytosis, trans-Golgi network-to-vacuole transport, and autophagy. We acknowledge the conservation and commonalities in the trafficking machinery across species, with emphasis on diversity and plant-specific features. Understanding the function of organelles and the trafficking machinery currently nonexistent in well-known model organisms will provide great opportunities to acquire new insights into the fundamental cellular process of membrane trafficking.
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Affiliation(s)
| | - Víctor Sánchez de Medina Hernández
- Gregor Mendel Institute, Austrian Academy of Sciences, Vienna BioCenter, 1030 Vienna, Austria
- Vienna BioCenter PhD Program, Doctoral School of the University of Vienna and Medical University of Vienna, A-1030, Vienna, Austria
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13
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Zhu RM, Li M, Li SW, Liang X, Li S, Zhang Y. Arabidopsis ADP-RIBOSYLATION FACTOR-A1s mediate tapetum-controlled pollen development. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 108:268-280. [PMID: 34309928 DOI: 10.1111/tpj.15440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Propagation of angiosperms mostly relies on sexual reproduction, in which gametophytic development is a pre-requisite. Male gametophytic development requires both gametophytic and sporophytic factors, most importantly early secretion and late programmed cell death of the tapetum. In addition to transcriptional factors, proteins at endomembrane compartments, such as receptor-like kinases and vacuolar proteases, control tapetal function. The cellular machinery that regulates their distribution is beginning to be revealed. We report here that ADP-RIBOSYLATION FACTOR-A1s (ArfA1s) are critical for tapetum-controlled pollen development. All six ArfA1s in the Arabidopsis genome are expressed during anther development, among which ArfA1b is specific to the tapetum and developing microspores. Although the ArfA1b loss-of-function mutant showed no pollen defects, probably due to redundancy, interference with ArfA1s by a dominant negative approach in the tapetum resulted in tapetal dysfunction and pollen abortion. We further showed that all six ArfA1s are associated with the Golgi and the trans-Golgi network/early endosome, suggesting that they have roles in regulating post-Golgi trafficking to the plasma membrane or to vacuoles. Indeed, we demonstrated that the expression of ArfA1bDN interfered with the targeting of proteins critical for tapetal development. The results presented here demonstrate a key role of ArfA1s in tapetum-controlled pollen development by mediating protein targeting through post-Golgi trafficking routes.
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Affiliation(s)
- Rui-Min Zhu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Min Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Shan-Wei Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Xin Liang
- Department of Plant Biology and Ecology, College of Life Sciences, Nankai University, Tianjin, China
| | - Sha Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Yan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
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14
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Zhao C, Pratelli R, Yu S, Shelley B, Collakova E, Pilot G. Detailed characterization of the UMAMIT proteins provides insight into their evolution, amino acid transport properties, and role in the plant. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:6400-6417. [PMID: 34223868 DOI: 10.1093/jxb/erab288] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/11/2021] [Indexed: 05/02/2023]
Abstract
Amino acid transporters play a critical role in distributing amino acids within the cell compartments and between plant organs. Despite this importance, relatively few amino acid transporter genes have been characterized and their role elucidated with certainty. Two main families of proteins encode amino acid transporters in plants: the amino acid-polyamine-organocation superfamily, containing mostly importers, and the UMAMIT (usually multiple acids move in and out transporter) family, apparently encoding exporters, totaling 63 and 44 genes in Arabidopsis, respectively. Knowledge of UMAMITs is scarce, based on six Arabidopsis genes and a handful of genes from other species. To gain insight into the role of the members of this family and provide data to be used for future characterization, we studied the evolution of the UMAMITs in plants, and determined the functional properties, the structure, and localization of the 47 Arabidopsis UMAMITs. Our analysis showed that the AtUMAMITs are essentially localized at the tonoplast or the plasma membrane, and that most of them are able to export amino acids from the cytosol, confirming a role in intra- and intercellular amino acid transport. As an example, this set of data was used to hypothesize the role of a few AtUMAMITs in the plant and the cell.
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Affiliation(s)
- Chengsong Zhao
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Réjane Pratelli
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Shi Yu
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Brett Shelley
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Eva Collakova
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Guillaume Pilot
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA 24061, USA
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15
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Ogasawara S, Ezaki M, Ishida R, Sueyoshi K, Saito S, Hiradate Y, Kudo T, Obara M, Kojima S, Uozumi N, Tanemura K, Hayakawa T. Rice amino acid transporter-like 6 (OsATL6) is involved in amino acid homeostasis by modulating the vacuolar storage of glutamine in roots. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 107:1616-1630. [PMID: 34216173 DOI: 10.1111/tpj.15403] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 06/02/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Glutamine is a product of ammonium (NH4+ ) assimilation catalyzed by glutamine synthetase (GS) and glutamate synthase (GOGAT). The growth of NH4+ -preferring paddy rice (Oryza sativa L.) depends on root NH4+ assimilation and the subsequent root-to-shoot allocation of glutamine; however, little is known about the mechanism of glutamine storage in roots. Here, using transcriptome and reverse genetics analyses, we show that the rice amino acid transporter-like 6 (OsATL6) protein exports glutamine to the root vacuoles under NH4+ -replete conditions. OsATL6 was expressed, along with OsGS1;2 and OsNADH-GOGAT1, in wild-type (WT) roots fed with sufficient NH4 Cl, and was induced by glutamine treatment. We generated two independent Tos17 retrotransposon insertion mutants showing reduced OsATL6 expression to determine the function of OsATL6. Compared with segregants lacking the Tos17 insertion, the OsATL6 knock-down mutant seedlings exhibited lower root glutamine content but higher glutamine concentration in the xylem sap and greater shoot growth under NH4+ -replete conditions. The transient expression of monomeric red fluorescent protein-fused OsATL6 in onion epidermal cells confirmed the tonoplast localization of OsATL6. When OsATL6 was expressed in Xenopus laevis oocytes, glutamine efflux from the cell into the acidic bath solution increased. Under sufficient NH4+ supply, OsATL6 transiently accumulated in sclerenchyma and pericycle cells, which are located adjacent to the Casparian strip, thus obstructing the apoplastic solute path, and in vascular parenchyma cells of WT roots before the peak accumulation of GS1;2 and NADH-GOGAT1 occurred. These findings suggest that OsATL6 temporarily stores excess glutamine, produced by NH4+ assimilation, in root vacuoles before it can be translocated to the shoot.
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Affiliation(s)
- Saori Ogasawara
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Masataka Ezaki
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Ryusuke Ishida
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Kuni Sueyoshi
- Faculty of Agriculture, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata, 950-2181, Japan
| | - Shunya Saito
- Graduate School of Engineering, Tohoku University, 6-6-07 Aobayama, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
| | - Yuki Hiradate
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Toru Kudo
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Mitsuhiro Obara
- Biological Resources and Post-harvest Division, Japan International Research Center for Agricultural Sciences, 1-1 Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan
| | - Soichi Kojima
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Nobuyuki Uozumi
- Graduate School of Engineering, Tohoku University, 6-6-07 Aobayama, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
| | - Kentaro Tanemura
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
| | - Toshihiko Hayakawa
- Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8572, Japan
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16
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Li CH, Tien HJ, Wen MF, Yen HE. Myo-inositol transport and metabolism participate in salt tolerance of halophyte ice plant seedlings. PHYSIOLOGIA PLANTARUM 2021; 172:1619-1629. [PMID: 33511710 DOI: 10.1111/ppl.13353] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 01/06/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
Myo-inositol and its metabolic derivatives such as pinitol, galactinol, and raffinose affect growth and development and are also involved in stress adaptation. Previous studies have identified myo-inositol transporters (INTs) as transporters of Na+ from root to shoot in the halophyte ice plant (Mesembryanthemum crystallinum). We found that the supply of myo-inositol could alleviate the dehydration effects of salt-stressed ice plant seedlings by decreasing the Na/K ratio in roots and increasing the Na/K ratio in shoots. Analyses of the uptake of exogenous myo-inositol revealed that ice plant seedlings contained intrinsic high-affinity transporters and inducible low-affinity uptake systems. The presence of Na+ facilitated both high- and low-affinity myo-inositol uptake. Six INT genes were identified from the ice plant transcriptome and named McINT1a, 1b, 2, 4a, 4b, and 4c, according to the classification of the Arabidopsis INT family. In seedlings treated with myo-inositol, salt, or myo-inositol plus salt, the expression patterns of all McINT members differed in shoot and root, which indicates organ-specific regulation of McINTs by salt and myo-inositol. The expression of McINT2, 4a, 4b, and 4c was induced by salt stress in shoot and root, but that of McINT1a and 1b was salt-induced only in shoot. The expression of pinitol biosynthesis gene IMT1 was induced by salt and myo-inositol, and their combination had a synergistic effect on the accumulation of pinitol. Supply of myo-inositol to salt-treated seedlings alleviated the detrimental effects by maintaining a low root Na/K ratio and providing precursors for the synthesis of compatible solute to maintain the osmotic balance.
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Affiliation(s)
- Cheng-Hsun Li
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Hsing-Jung Tien
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Meng-Fang Wen
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Hungchen Emilie Yen
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
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17
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Srinivasan P, Smolke CD. Engineering cellular metabolite transport for biosynthesis of computationally predicted tropane alkaloid derivatives in yeast. Proc Natl Acad Sci U S A 2021; 118:e2104460118. [PMID: 34140414 PMCID: PMC8237673 DOI: 10.1073/pnas.2104460118] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Microbial biosynthesis of plant natural products (PNPs) can facilitate access to valuable medicinal compounds and derivatives. Such efforts are challenged by metabolite transport limitations, which arise when complex plant pathways distributed across organelles and tissues are reconstructed in unicellular hosts without concomitant transport machinery. We recently reported an engineered yeast platform for production of the tropane alkaloid (TA) drugs hyoscyamine and scopolamine, in which product accumulation is limited by vacuolar transport. Here, we demonstrate that alleviation of transport limitations at multiple steps in an engineered pathway enables increased production of TAs and screening of useful derivatives. We first show that supervised classifier models trained on a tissue-delineated transcriptome from the TA-producing plant Atropa belladonna can predict TA transporters with greater efficacy than conventional regression- and clustering-based approaches. We demonstrate that two of the identified transporters, AbPUP1 and AbLP1, increase TA production in engineered yeast by facilitating vacuolar export and cellular reuptake of littorine and hyoscyamine. We incorporate four different plant transporters, cofactor regeneration mechanisms, and optimized growth conditions into our yeast platform to achieve improvements in de novo hyoscyamine and scopolamine production of over 100-fold (480 μg/L) and 7-fold (172 μg/L). Finally, we leverage computational tools for biosynthetic pathway prediction to produce two different classes of TA derivatives, nortropane alkaloids and tropane N-oxides, from simple precursors. Our work highlights the importance of cellular transport optimization in recapitulating complex PNP biosyntheses in microbial hosts and illustrates the utility of computational methods for gene discovery and expansion of heterologous biosynthetic diversity.
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Affiliation(s)
| | - Christina D Smolke
- Department of Bioengineering, Stanford University, Stanford, CA 94305;
- Chan Zuckerberg Biohub, San Francisco, CA 94158
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18
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Arora D, Damme DV. Motif-based endomembrane trafficking. PLANT PHYSIOLOGY 2021; 186:221-238. [PMID: 33605419 PMCID: PMC8154067 DOI: 10.1093/plphys/kiab077] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/17/2021] [Indexed: 05/08/2023]
Abstract
Endomembrane trafficking, which allows proteins and lipids to flow between the different endomembrane compartments, largely occurs by vesicle-mediated transport. Transmembrane proteins intended for transport are concentrated into a vesicle or carrier by undulation of a donor membrane. This is followed by vesicle scission, uncoating, and finally, fusion at the target membrane. Three major trafficking pathways operate inside eukaryotic cells: anterograde, retrograde, and endocytic. Each pathway involves a unique set of machinery and coat proteins that pack the transmembrane proteins, along with their associated lipids, into specific carriers. Adaptor and coatomer complexes are major facilitators that function in anterograde transport and in endocytosis. These complexes recognize the transmembrane cargoes destined for transport and recruit the coat proteins that help form the carriers. These complexes use either linear motifs or posttranslational modifications to recognize the cargoes, which are then packaged and delivered along the trafficking pathways. In this review, we focus on the different trafficking complexes that share a common evolutionary branch in Arabidopsis (Arabidopsis thaliana), and we discuss up-to-date knowledge about the cargo recognition motifs they use.
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Affiliation(s)
- Deepanksha Arora
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Technologiepark 71, Ghent 9052, Belgium
| | - Daniёl Van Damme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Technologiepark 71, Ghent 9052, Belgium
- Author for communication:
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19
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Garg V, Kühn C. What determines the composition of the phloem sap? Is there any selectivity filter for macromolecules entering the phloem sieve elements? PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:284-291. [PMID: 32248039 DOI: 10.1016/j.plaphy.2020.03.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
In view of recent findings, it is still a matter of debate whether the composition of the phloem sap of higher plants is specific and based on a plasmodesmal selectivity filter for macromolecular transport, or whether simply related to size, abundance and half-life of the macromolecules within the phloem sap. A range of reports indicates specific function of phloem-mobile signaling molecules such as the florigen making it indispensable to discriminate specific macromolecules entering the phloem from others which cannot cross this selectivity filter. Nevertheless, several findings have discussed for a non-selective transport via plasmodesmata, or contamination of the phloem sap by degradation products coming from immature still developing young sieve elements undergoing differentiation. Here, we discuss several possibilities, and raise the question how selectivity of the phloem sap composition could be achieved thereby focusing on mobility and dynamics of sucrose transporter mRNA and proteins.
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Affiliation(s)
- Varsha Garg
- Institute of Biology, Department of Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13, Building 12, 10115, Berlin, Germany
| | - Christina Kühn
- Institute of Biology, Department of Plant Physiology, Humboldt-Universität zu Berlin, Philippstr. 13, Building 12, 10115, Berlin, Germany.
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20
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Chai S, Ge FR, Zhang Y, Li S. S-acylation of CBL10/SCaBP8 by PAT10 is crucial for its tonoplast association and function in salt tolerance. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:718-722. [PMID: 31441225 DOI: 10.1111/jipb.12864] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/19/2019] [Indexed: 05/23/2023]
Abstract
Crop yield is sensitive to salt stresses, for which Calcineurin B-like proteins (CBLs) are major response factors. This study shows that Arabidopsis CBL10, through protein S-acylation by protein S-acyl transferase10, targets to the vacuolar membrane to confer salt tolerance.
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Affiliation(s)
- Sen Chai
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271000, China
| | - Fu-Rong Ge
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271000, China
| | - Yan Zhang
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271000, China
| | - Sha Li
- College of Life Sciences, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271000, China
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21
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Peng Q, Cai Y, Lai E, Nakamura M, Liao L, Zheng B, Ogutu C, Cherono S, Han Y. The sucrose transporter MdSUT4.1 participates in the regulation of fruit sugar accumulation in apple. BMC PLANT BIOLOGY 2020; 20:191. [PMID: 32375636 PMCID: PMC7203859 DOI: 10.1186/s12870-020-02406-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 04/27/2020] [Indexed: 05/24/2023]
Abstract
BACKGROUND Sugar content is an important determinant of fruit sweetness, but details on the complex molecular mechanism underlying fruit sugar accumulation remain scarce. Here, we report the role of sucrose transporter (SUT) family in regulating fruit sugar accumulation in apple. RESULTS Gene-tagged markers were developed to conduct candidate gene-based association study, and an SUT4 member MdSUT4.1 was found to be significantly associated with fruit sugar accumulation. MdSUT4.1 encodes a tonoplast localized protein and its expression level had a negative correlation with fruit sugar content. Overexpression of MdSUT4.1 in strawberry and apple callus had an overall negative impact on sugar accumulation, suggesting that it functions to remobilize sugar out of the vacuole. In addition, MdSUT4.1 is located on chromosomal region harboring a previously reported QTL for sugar content, suggesting that it is a candidate gene for fruit sugar accumulation in apple. CONCLUSIONS MdSUT4.1 is involved in the regulation of fruit sugar accumulation in apple. This study is not only helpful for understanding the complex mechanism of fruit sugar accumulation, but it also provides molecular tools for genetic improvement of fruit quality in breeding programs of apple.
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Affiliation(s)
- Qian Peng
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Yaming Cai
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Enhui Lai
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Masayoshi Nakamura
- Institute of Transformative Bio-Molecules, Nagoya University, Nagoya, Japan
| | - Liao Liao
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan, 430074, China
| | - Beibei Zheng
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan, 430074, China
| | - Collins Ogutu
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Sylvia Cherono
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Yuepeng Han
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan, 430074, China.
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan, 430074, China.
- Sino-African Joint Research Center, Chinese Academy of Sciences, Wuhan, 430074, China.
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22
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Nielsen E. The Small GTPase Superfamily in Plants: A Conserved Regulatory Module with Novel Functions. ANNUAL REVIEW OF PLANT BIOLOGY 2020; 71:247-272. [PMID: 32442390 DOI: 10.1146/annurev-arplant-112619-025827] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Small GTP-binding proteins represent a highly conserved signaling module in eukaryotes that regulates diverse cellular processes such as signal transduction, cytoskeletal organization and cell polarity, cell proliferation and differentiation, intracellular membrane trafficking and transport vesicle formation, and nucleocytoplasmic transport. These proteins function as molecular switches that cycle between active and inactive states, and this cycle is linked to GTP binding and hydrolysis. In this review, the roles of the plant complement of small GTP-binding proteins in these cellular processes are described, as well as accessory proteins that control their activity, and current understanding of the functions of individual members of these families in plants-with a focus on the model organism Arabidopsis-is presented. Some potential novel roles of these GTPases in plants, relative to their established roles in yeast and/or animal systems, are also discussed.
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Affiliation(s)
- Erik Nielsen
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109, USA;
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23
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MTV proteins unveil ER- and microtubule-associated compartments in the plant vacuolar trafficking pathway. Proc Natl Acad Sci U S A 2020; 117:9884-9895. [PMID: 32321832 DOI: 10.1073/pnas.1919820117] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The factors and mechanisms involved in vacuolar transport in plants, and in particular those directing vesicles to their target endomembrane compartment, remain largely unknown. To identify components of the vacuolar trafficking machinery, we searched for Arabidopsis modified transport to the vacuole (mtv) mutants that abnormally secrete the synthetic vacuolar cargo VAC2. We report here on the identification of 17 mtv mutations, corresponding to mutant alleles of MTV2/VSR4, MTV3/PTEN2A MTV7/EREL1, MTV8/ARFC1, MTV9/PUF2, MTV10/VPS3, MTV11/VPS15, MTV12/GRV2, MTV14/GFS10, MTV15/BET11, MTV16/VPS51, MTV17/VPS54, and MTV18/VSR1 Eight of the MTV proteins localize at the interface between the trans-Golgi network (TGN) and the multivesicular bodies (MVBs), supporting that the trafficking step between these compartments is essential for segregating vacuolar proteins from those destined for secretion. Importantly, the GARP tethering complex subunits MTV16/VPS51 and MTV17/VPS54 were found at endoplasmic reticulum (ER)- and microtubule-associated compartments (EMACs). Moreover, MTV16/VPS51 interacts with the motor domain of kinesins, suggesting that, in addition to tethering vesicles, the GARP complex may regulate the motors that transport them. Our findings unveil a previously uncharacterized compartment of the plant vacuolar trafficking pathway and support a role for microtubules and kinesins in GARP-dependent transport of soluble vacuolar cargo in plants.
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24
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Genome-wide identification, expression, and association analysis of the monosaccharide transporter (MST) gene family in peanut ( Arachis hypogaea L.). 3 Biotech 2020; 10:130. [PMID: 32154043 DOI: 10.1007/s13205-020-2123-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/05/2020] [Indexed: 10/25/2022] Open
Abstract
In this study, we reported the genome-wide analysis of the whole sugar transporter gene family of a legume species, peanut (Arachis hypogaea L.), including the chromosome locations, gene structures, phylogeny, expression patterns, as well as comparative genomic analysis with Arabidopsis, rice, grape, and soybean. A total of 76 AhMST genes (AhMST1-76) were identified from the peanut genome and located unevenly in 20 chromosomes. Phylogeny analysis indicated that the AhMSTs can be divided into eight groups including two undefined peanut-specific groups. Transcriptional profiles revealed that many AhMST genes showed tissue-specific expression, the majority of the AhMST genes mainly expressed in sink organs and floral organ of peanut. Chromosome distribution pattern and synteny analysis strongly indicated that genome-wide segmental and tandem duplication contributed to the expansion of peanut MST genes. Four common orthologs (AhMST9, AhMST13, AhMST40, and AhMST43) between peanut and the other four species were identified by comparative genomic analysis, which might play important roles in maintaining the growth and development of plant. Furthermore, four polymorphic sites in AhMST11, AhMST13, and AhMST60 were significantly correlated with hundred pod weight (HPW) and hundred seed weight (HSW) by association analysis. In a word, these results will provide new insights for understanding the functions of AhMST family members to sugar transporting and the potential for yield improvement in peanut.
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25
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Minamino N, Ueda T. RAB GTPases and their effectors in plant endosomal transport. CURRENT OPINION IN PLANT BIOLOGY 2019; 52:61-68. [PMID: 31454706 DOI: 10.1016/j.pbi.2019.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/18/2019] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
The plant endomembrane system comprises distinctive membrane-bounded organelles connected with one another by the membrane trafficking system. The RAB GTPase is a key component of the membrane trafficking machinery that regulates the targeting and tethering of trafficking vesicles to target compartments by acting as a molecular switch cycling between active and inactive states. The functions of RAB GTPases are fulfilled through their interactions with several classes of interacting factors, including guanine nucleotide exchange factors (GEFs) and effector proteins. Effector proteins for plant RAB GTPases consist of evolutionarily conserved and plant-unique factors, which are involved in various membrane trafficking events in plant cells in ways unique to plants. In this review, we summarize recent findings on the functions of endosomal RAB GTPases that underwent unique diversification during plant evolution, with a special focus on RAB5/RABF and RAB11/RABA.
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Affiliation(s)
- Naoki Minamino
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
| | - Takashi Ueda
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan; Department of Basic Biology, SOKENDAI (Graduate University of Advanced Studies), Okazaki, Aichi 444-8585, Japan.
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26
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AP3M harbors actin filament binding activity that is crucial for vacuole morphology and stomatal closure in Arabidopsis. Proc Natl Acad Sci U S A 2019; 116:18132-18141. [PMID: 31431522 DOI: 10.1073/pnas.1901431116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Stomatal movement is essential for plant growth. This process is precisely regulated by various cellular activities in guard cells. F-actin dynamics and vacuole morphology are both involved in stomatal movement. The sorting of cargoes by clathrin adaptor protein (AP) complexes from the Golgi to the vacuole is critical for establishing a normal vacuole morphology. In this study, we demonstrate that the medium subunit of the AP3 complex (AP3M) binds to and severs actin filaments in vitro and that it participates in the sorting of cargoes (such as the sucrose exporter SUC4) to the tonoplast, and thereby regulates stomatal closure in Arabidopsis thaliana Defects in AP3 or SUC4 led to more rapid water loss and delayed stomatal closure, as well as hypersensitivity to drought stress. In ap3m mutants, the F-actin status was altered compared to the wild type, and the sorted cargoes failed to localize to the tonoplast. AP3M contains a previously unidentified F-actin binding domain that is conserved in AP3M homologs in both plants and animals. Mutations in the F-actin binding domain of AP3M abolished its F-actin binding activity in vitro, leading to an aberrant vacuole morphology and reduced levels of SUC4 on the tonoplast in guard cells. Our findings indicate that the F-actin binding activity of AP3M is required for the precise localization of AP3-dependent cargoes to the tonoplast and for the regulation of vacuole morphology in guard cells during stomatal closure.
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27
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Yoshinari A, Hosokawa T, Amano T, Beier MP, Kunieda T, Shimada T, Hara-Nishimura I, Naito S, Takano J. Polar Localization of the Borate Exporter BOR1 Requires AP2-Dependent Endocytosis. PLANT PHYSIOLOGY 2019; 179:1569-1580. [PMID: 30710051 PMCID: PMC6446798 DOI: 10.1104/pp.18.01017] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 01/24/2019] [Indexed: 05/19/2023]
Abstract
Boron (B) is an essential element in plants but is toxic when it accumulates to high levels. In root cells of Arabidopsis (Arabidopsis thaliana), the borate exporter BOR1 is polarly localized in the plasma membrane toward the stele side for directional transport of B. Upon high-B supply, BOR1 is rapidly internalized and degraded in the vacuole. The polar localization and B-induced vacuolar sorting of BOR1 are mediated by endocytosis from the plasma membrane. To dissect the endocytic pathways mediating the polar localization and vacuolar sorting, we investigated the contribution of the clathrin adaptor protein, ADAPTOR PROTEIN2 (AP2) complex, to BOR1 trafficking. In the mutants lacking µ- or σ-subunits of the AP2 complex, the polar localization and constitutive endocytosis of BOR1 under low-B conditions were dramatically disturbed. A coimmunoprecipitation assay showed association of the AP2 complex with BOR1, while it was independent of YxxΦ sorting motifs, which are in a cytosolic loop of BOR1. A yeast two-hybrid assay supported the interaction of the AP2 complex µ-subunit with the C-terminal tail but not with the YxxΦ motifs in the cytosolic loop of BOR1. Intriguingly, lack of the AP2 subunit did not affect the B-induced rapid internalization/vacuolar sorting of BOR1. Consistent with defects in the polar localization, the AP2 complex mutants showed hypersensitivity to B deficiency. Our results indicate that AP2-dependent endocytosis maintains the polar localization of BOR1 to support plant growth under low-B conditions, whereas the B-induced vacuolar sorting of BOR1 is mediated through an AP2-independent endocytic pathway.
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Affiliation(s)
- Akira Yoshinari
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai 599-8531, Japan
- Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Takuya Hosokawa
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai 599-8531, Japan
| | - Taro Amano
- Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Marcel Pascal Beier
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai 599-8531, Japan
| | - Tadashi Kunieda
- Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Tomoo Shimada
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Ikuko Hara-Nishimura
- Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Satoshi Naito
- Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
- Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Junpei Takano
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai 599-8531, Japan
- Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
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28
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Maruyama H, Sasaki T, Yamamoto Y, Wasaki J. AtALMT3 is Involved in Malate Efflux Induced by Phosphorus Deficiency in Arabidopsis thaliana Root Hairs. PLANT & CELL PHYSIOLOGY 2019; 60:107-115. [PMID: 30239977 DOI: 10.1093/pcp/pcy190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
Under phosphorus (P)-deficient conditions, organic acid secretion from roots plays an important role in P mobilization from insoluble P in the soil. In this study, we characterized AtALMT3, a homolog of the Arabidopsis thaliana aluminum-activated malate transporter family gene. Among the 14 AtALMT family genes, only AtALMT3 was significantly up-regulated in P-deficient roots. AtALMT3 promoter::β-glucuronidase is expressed in the epidermis in roots, especially in root hair cells. AtALMT3 protein was localized in the plasma membrane and in small vesicles. Fluorescence of AtALMT3::GFP was not observed on the vacuole membrane of protoplast after lysis, indicating that AtALMT3 localizes mainly in the plasma membrane. Compared with the wild-type (WT) line, malate exudation in the AtALMT3-knockdown line (atalmt3-1) and overexpression line (atalmt3-2) under P deficiency were, respectively, 37% and 126%. In contrast, no significant difference was found in citrate exudation among these lines. The complementation of the atalmt3-1 line with AtALMT3 recovered the malate exudation to the level of the WT. Taken together, these results suggest that AtALMT3 localized in root hair membranes is involved in malate efflux in response to P deficiency.
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Affiliation(s)
- Hayato Maruyama
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, Japan
| | - Takayuki Sasaki
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Yoko Yamamoto
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Jun Wasaki
- Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, Japan
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29
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Strobl SM, Kischka D, Heilmann I, Mouille G, Schneider S. The Tonoplastic Inositol Transporter INT1 From Arabidopsis thaliana Impacts Cell Elongation in a Sucrose-Dependent Way. FRONTIERS IN PLANT SCIENCE 2018; 9:1657. [PMID: 30505313 PMCID: PMC6250803 DOI: 10.3389/fpls.2018.01657] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/25/2018] [Indexed: 05/29/2023]
Abstract
The tonoplastic inositol transporter INT1 is the only known transport protein in Arabidopsis that facilitates myo-inositol import from the vacuole into the cytoplasm. Impairment of the release of vacuolar inositol by knockout of INT1 results in a severe inhibition of cell elongation in roots as well as in etiolated hypocotyls. Importantly, a more strongly reduced cell elongation was observed when sucrose was supplied in the growth medium, and this sucrose-dependent effect can be complemented by the addition of exogenous myo-inositol. Comparing int1 mutants (defective in transport) with mutants defective in myo-inositol biosynthesis (mips1 mutants) revealed that the sucrose-induced inhibition in cell elongation does not just depend on inositol depletion. Secondary effects as observed for altered availability of inositol in biosynthesis mutants, as disturbed membrane turnover, alterations in PIN protein localization or alterations in inositol-derived signaling molecules could be ruled out to be responsible for impairing the cell elongation in int1 mutants. Although the molecular mechanism remains to be elucidated, our data implicate a crucial role of INT1-transported myo-inositol in regulating cell elongation in a sucrose-dependent manner and underline recent reports of regulatory roles for sucrose and other carbohydrate intermediates as metabolic semaphores.
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Affiliation(s)
- Sabrina Maria Strobl
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Dominik Kischka
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Ingo Heilmann
- Department of Cellular Biochemistry, Institute for Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Grégory Mouille
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris Saclay, Versailles, France
| | - Sabine Schneider
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
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30
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Song SJ, Feng QN, Li CL, Li E, Liu Q, Kang H, Zhang W, Zhang Y, Li S. A Tonoplast-Associated Calcium-Signaling Module Dampens ABA Signaling during Stomatal Movement. PLANT PHYSIOLOGY 2018; 177:1666-1678. [PMID: 29898977 PMCID: PMC6084651 DOI: 10.1104/pp.18.00377] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 06/05/2018] [Indexed: 05/22/2023]
Abstract
Stomatal movement, critical for photobiosynthesis, respiration, and stress responses, is regulated by many factors, among which abscisic acid (ABA) is critical. Early events of ABA signaling involve Ca2+ influx and an increase of cytoplasmic calcium ([Ca2+]cyt). Positive regulators of this process have been extensively studied, whereas negative regulators are obscure. ABA-induced stomatal closure involves K+ flux and vacuolar convolution. How these processes are connected with Ca2+ is not fully understood. We report that pat10-1, a null mutant of Arabidopsis (Arabidopsis thaliana) PROTEIN S-ACYL TRANSFERASE10 (PAT10), is hypersensitive to ABA-induced stomatal closure and vacuolar convolution. A similar phenotype was observed in cbl2;cbl3, the double mutant of CBL2 and CBL3, whose tonoplast association depends on PAT10. Functional loss of the PAT10-CBL2/CBL3 system resulted in enhanced Ca2+ influx and [Ca2+]cyt elevation. Promoting vacuolar K+ accumulation by overexpressing NHX2 suppressed ABA-hypersensitive stomatal closure and vacuolar convolution of the mutants, suggesting that PAT10-CBL2/CBL3 positively mediates vacuolar K+ accumulation. We have identified CBL-interacting protein kinases (CIPKs) that mediate CBL2/CBL3 signaling during ABA-induced stomatal movement. Functional loss of the PAT10-CBL2/3-CIPK9/17 system in guard cells enhanced drought tolerance. We propose that the tonoplast CBL-CIPK complexes form a signaling module that negatively regulates ABA signaling during stomatal movement.
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Affiliation(s)
- Shi-Jian Song
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Qiang-Nan Feng
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Chun-Long Li
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan 250100, China
| | - En Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Qi Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Hui Kang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Wei Zhang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan 250100, China
| | - Yan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Sha Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
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31
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Feng QN, Liang X, Li S, Zhang Y. The ADAPTOR PROTEIN-3 Complex Mediates Pollen Tube Growth by Coordinating Vacuolar Targeting and Organization. PLANT PHYSIOLOGY 2018; 177:216-225. [PMID: 29523712 PMCID: PMC5933126 DOI: 10.1104/pp.17.01722] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 02/27/2018] [Indexed: 05/19/2023]
Abstract
Pollen tube growth is an essential step for successful plant reproduction. Vacuolar trafficking and dynamic organization are important for pollen tube growth; however, the key proteins involved in these processes are not well understood. Here, we report that the ADAPTOR PROTEIN-3 (AP-3) complex and its tonoplast cargo PROTEIN S-ACYL TRANSFERASE10 (PAT10) are critical for pollen tube growth in Arabidopsis (Arabidopsis thaliana). AP-3 is a heterotetrameric protein complex consisting of four subunits, δ, β, µ, and σ. AP-3 regulates tonoplast targeting of several cargoes, such as PAT10. We show that functional loss of any of the four AP-3 subunits reduces plant fertility. In ap-3 mutants, pollen development was normal but pollen tube growth was compromised, leading to reduced male transmission. Functional loss of PAT10 caused a similar reduction in pollen tube growth, suggesting that the tonoplast association of PAT10 mediated by AP-3 is crucial for this process. Indeed, the Ca2+ gradient during pollen tube growth was reduced significantly due to AP-3 loss of function, consistent with the abnormal targeting of CALCINUERIN B-LIKE2 (CBL2) and CBL3, whose tonoplast association depends on PAT10. Furthermore, we show that the pollen tubes of ap-3 mutants have vacuoles with simplified tubules and bulbous structures, indicating that AP-3 affects vacuolar organization. Our results demonstrate a role for AP-3 in plant reproduction and provide insights into the role of vacuoles in polarized cell growth.
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Affiliation(s)
- Qiang-Nan Feng
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Xin Liang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Sha Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Yan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
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32
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Radchuk V, Tran V, Radchuk R, Diaz-Mendoza M, Weier D, Fuchs J, Riewe D, Hensel G, Kumlehn J, Munz E, Heinzel N, Rolletschek H, Martinez M, Borisjuk L. Vacuolar processing enzyme 4 contributes to maternal control of grain size in barley by executing programmed cell death in the pericarp. THE NEW PHYTOLOGIST 2018; 218:1127-1142. [PMID: 28836669 DOI: 10.1111/nph.14729] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 06/25/2017] [Indexed: 05/12/2023]
Abstract
The angiosperm embryo and endosperm are limited in space because they grow inside maternal seed tissues. The elimination of cell layers of the maternal seed coat by programmed cell death (PCD) could provide space and nutrition to the filial organs. Using the barley (Hordeum vulgare L.) seed as a model, we elucidated the role of vacuolar processing enzyme 4 (VPE4) in cereals by using an RNAi approach and targeting the enzymatic properties of the recombinant protein. A comparative characterization of transgenic versus wild-type plants included transcriptional and metabolic profiling, flow cytometry, histology and nuclear magnetic imaging of grains. The recombinant VPE4 protein exhibited legumain and caspase-1 properties in vitro. Pericarp disintegration was delayed in the transgenic grains. Although the VPE4 gene and enzymatic activity was decreased in the early developing pericarp, storage capacity and the size of the endosperm and embryo were reduced in the mature VPE4-repressed grains. The persistence of the pericarp in the VPE4-affected grains constrains endosperm and embryo growth and leads to transcriptional reprogramming, perturbations in signalling and adjustments in metabolism. We conclude that VPE4 expression executes PCD in the pericarp, which is required for later endosperm filling, and argue for a role of PCD in maternal control of seed size in cereals.
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Affiliation(s)
- Volodymyr Radchuk
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Van Tran
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Ruslana Radchuk
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Mercedes Diaz-Mendoza
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid, 28223, Spain
| | - Diana Weier
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Joerg Fuchs
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - David Riewe
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Goetz Hensel
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Jochen Kumlehn
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Eberhard Munz
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Nicolas Heinzel
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Hardy Rolletschek
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
| | - Manuel Martinez
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid, 28223, Spain
| | - Ljudmilla Borisjuk
- Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466, Gatersleben, Germany
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33
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Müdsam C, Wollschläger P, Sauer N, Schneider S. Sorting of Arabidopsis NRAMP3 and NRAMP4 depends on adaptor protein complex AP4 and a dileucine-based motif. Traffic 2018; 19:503-521. [PMID: 29573093 DOI: 10.1111/tra.12567] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 03/14/2018] [Accepted: 03/16/2018] [Indexed: 01/01/2023]
Abstract
Adaptor protein complexes mediate cargo selection and vesicle trafficking to different cellular membranes in all eukaryotic cells. Information on the role of AP4 in plants is still limited. Here, we present the analyses of Arabidopsis thaliana mutants lacking different subunits of AP4. These mutants show abnormalities in their development and in protein sorting. We found that growth of roots and etiolated hypocotyls, as well as male fertility and trichome morphology are disturbed in ap4. Analyses of GFP-fusions transiently expressed in mesophyll protoplasts demonstrated that the tonoplast (TP) proteins MOT2, NRAMP3 and NRAMP4, but not INT1, are partially sorted to the plasma membrane (PM) in the absence of a functional AP4 complex. Moreover, alanine mutagenesis revealed that in wild-type plants, sorting of NRAMP3 and NRAMP4 to the TP requires an N-terminal dileucine-based motif. The NRAMP3 or NRAMP4 N-terminal domain containing the dileucine motif was sufficient to redirect the PM localized INT4 protein to the TP and to confer AP4-dependency on sorting of INT1. Our data show that correct sorting of NRAMP3 and NRAMP4 depends on both, an N-terminal dileucine-based motif as well as AP4.
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Affiliation(s)
- Christina Müdsam
- Molecular Plant Physiology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Paul Wollschläger
- Molecular Plant Physiology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Norbert Sauer
- Molecular Plant Physiology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Sabine Schneider
- Molecular Plant Physiology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
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34
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Carqueijeiro I, Sepúlveda LJ, Mosquera A, Payne R, Corbin C, Papon N, de Bernonville TD, Besseau S, Lanoue A, Glévarec G, Clastre M, St-Pierre B, Atehortùa L, Giglioli-Guivarc'h N, O'Connor SE, Oudin A, Courdavault V. Vacuole-Targeted Proteins: Ins and Outs of Subcellular Localization Studies. Methods Mol Biol 2018; 1789:33-54. [PMID: 29916070 DOI: 10.1007/978-1-4939-7856-4_4] [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] [Indexed: 12/13/2022]
Abstract
Accurate and efficient demonstrations of protein localizations to the vacuole or tonoplast remain strict prerequisites to decipher the role of vacuoles in the whole plant cell biology and notably in defence processes. In this chapter, we describe a reliable procedure of protein subcellular localization study through transient transformations of Catharanthus roseus or onion cells and expression of fusions with fluorescent proteins allowing minimizing artefacts of targeting.
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Affiliation(s)
- Inês Carqueijeiro
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Liuda J Sepúlveda
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France.,Laboratorio de Biotecnología, Sede de Investigación Universitaria, Universidad de Antioquia, Medellin, Colombia
| | - Angela Mosquera
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France.,Laboratorio de Biotecnología, Sede de Investigación Universitaria, Universidad de Antioquia, Medellin, Colombia
| | - Richard Payne
- Department of Biological Chemistry, The John Innes Centre, Norwich Research Park, Norwich, UK
| | - Cyrielle Corbin
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Nicolas Papon
- EA3142 "Groupe d'Etude des Interactions Hôte-Pathogène", Université d'Angers, Angers, France
| | - Thomas Dugé de Bernonville
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Sébastien Besseau
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Arnaud Lanoue
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Gaëlle Glévarec
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Marc Clastre
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Benoit St-Pierre
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Lucia Atehortùa
- Laboratorio de Biotecnología, Sede de Investigación Universitaria, Universidad de Antioquia, Medellin, Colombia
| | - Nathalie Giglioli-Guivarc'h
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Sarah E O'Connor
- Department of Biological Chemistry, The John Innes Centre, Norwich Research Park, Norwich, UK
| | - Audrey Oudin
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Vincent Courdavault
- EA2106 "Biomolécules et Biotechnologies Végétales", UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France.
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35
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Di Sansebastiano GP, Barozzi F, Piro G, Denecke J, de Marcos Lousa C. Trafficking routes to the plant vacuole: connecting alternative and classical pathways. JOURNAL OF EXPERIMENTAL BOTANY 2017; 69:79-90. [PMID: 29096031 DOI: 10.1093/jxb/erx376] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/27/2017] [Indexed: 05/02/2023]
Abstract
Due to the numerous roles plant vacuoles play in cell homeostasis, detoxification, and protein storage, the trafficking pathways to this organelle have been extensively studied. Recent evidence, however, suggests that our vision of transport to the vacuole is not as simple as previously imagined. Alternative routes have been identified and are being characterized. Intricate interconnections between routes seem to occur in various cases, complicating the interpretation of data. In this review, we aim to summarize the published evidence and link the emerging data with previous findings. We discuss the current state of information on alternative and classical trafficking routes to the plant vacuole.
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Affiliation(s)
- Gian Pietro Di Sansebastiano
- DiSTeBA (Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali), University of Salento, Campus ECOTEKNE, Italy
| | - Fabrizio Barozzi
- DiSTeBA (Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali), University of Salento, Campus ECOTEKNE, Italy
| | - Gabriella Piro
- DiSTeBA (Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali), University of Salento, Campus ECOTEKNE, Italy
| | | | - Carine de Marcos Lousa
- Centre for Plant Sciences, Leeds University, UK
- Leeds Beckett University, School of Applied and Clinical Sciences, UK
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36
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Singh MK, Jürgens G. Specificity of plant membrane trafficking - ARFs, regulators and coat proteins. Semin Cell Dev Biol 2017; 80:85-93. [PMID: 29024759 DOI: 10.1016/j.semcdb.2017.10.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Revised: 09/29/2017] [Accepted: 10/09/2017] [Indexed: 11/27/2022]
Abstract
Approximately one-third of all eukaryotic proteins are delivered to their destination by trafficking within the endomembrane system. Such cargo proteins are incorporated into forming membrane vesicles on donor compartments and delivered to acceptor compartments by vesicle fusion. How cargo proteins are sorted into forming vesicles is still largely unknown. Here we review the roles of small GTPases of the ARF/SAR1 family, their regulators designated ARF guanine-nucleotide exchange factors (ARF-GEFs) and ARF GTPase-activating proteins (ARF-GAPs) as well as coat protein complexes during membrane vesicle formation. Although conserved across eukaryotes, these four functional groups of proteins display plant-specific modifications in composition, structure and function.
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Affiliation(s)
- Manoj K Singh
- Centre for Plant Molecular Biology (ZMBP), University of Tübingen, Auf der Morgenstelle 32, 72076 Tübingen, Germany
| | - Gerd Jürgens
- Centre for Plant Molecular Biology (ZMBP), University of Tübingen, Auf der Morgenstelle 32, 72076 Tübingen, Germany.
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37
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Yamada K, Osakabe Y, Yamaguchi-Shinozaki K. A C-terminal motif contributes to the plasma membrane localization of Arabidopsis STP transporters. PLoS One 2017; 12:e0186326. [PMID: 29028820 PMCID: PMC5640241 DOI: 10.1371/journal.pone.0186326] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/07/2017] [Indexed: 12/23/2022] Open
Abstract
Membrane trafficking is highly organized to maintain cellular homeostasis in any organisms. Membrane-embedded transporters are targeted to various organelles to execute appropriate partition and allocation of their substrates, such as ions or sugars. To ensure the fidelity of targeting and sorting, membrane proteins including transporters have sorting signals that specify the subcellular destination and the trafficking pathway by which the destination is to be reached. Here, we have identified a novel sorting signal (called the tri-aromatic motif) which contains three aromatic residues, two tryptophans and one histidine, for the plasma membrane localization of sugar transporters in the STP family in Arabidopsis. We firstly found that a C-terminal deletion disrupted the sugar uptake activity of STP1 in yeast cells. Additional deletion and mutation analyses demonstrated that the three aromatic residues in the C-terminus, conserved among all Arabidopsis STP transporters, were critical for sugar uptake by not only STP1 but also another STP transporter STP13. We observed that, when the tri-aromatic motif was mutated, STP1 was largely localized at the endomembrane compartments in yeast cells, indicating that this improper subcellular localization led to the loss of sugar absorption. Importantly, our further analyses uncovered that mutations of the tri-aromatic motif resulted in the endoplasmic reticulum (ER) retention of STP1 and STP13 in plant cells, suggesting that this motif is involved at the step of ER exit of STP transporters to facilitate their plasma membrane localization. Together, we here identified a novel ER export signal, and showed that appropriate sorting via the tri-aromatic motif is important for sugar absorption by STP transporters.
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Affiliation(s)
- Kohji Yamada
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
- * E-mail: (K.Y.); (K.Y-S)
| | - Yuriko Osakabe
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
| | - Kazuko Yamaguchi-Shinozaki
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
- * E-mail: (K.Y.); (K.Y-S)
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38
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Feng QN, Li S, Zhang Y. Update on adaptor protein-3 in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2017; 12:e1356969. [PMID: 28786748 PMCID: PMC5616146 DOI: 10.1080/15592324.2017.1356969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 06/07/2023]
Abstract
Adaptor proteins (APs) mediate protein sorting within endomembrane compartments in eukaryotic cells. AP-3 is an ancient AP complex mediating vacuolar trafficking in different phyla. Only recently, a few tonoplast proteins have been identified as AP-3 cargos in Arabidopsis whereas the function of AP-3 was largely unexplored. Here, we summarize recent advances on AP-3 in Arabidopsis, pointing at the potential roles of AP-3 in plant development and cellular processes.
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Affiliation(s)
- Qiang-Nan Feng
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Sha Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Yan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China
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39
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Krüger F, Schumacher K. Pumping up the volume - vacuole biogenesis in Arabidopsis thaliana. Semin Cell Dev Biol 2017; 80:106-112. [PMID: 28694113 DOI: 10.1016/j.semcdb.2017.07.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/06/2017] [Accepted: 07/06/2017] [Indexed: 01/05/2023]
Abstract
Plant architecture follows the need to collect CO2, solar energy, water and mineral nutrients via large surface areas. It is by the presence of a central vacuole that fills much of the cell volume that plants manage to grow at low metabolic cost. In addition vacuoles buffer the fluctuating supply of essential nutrients and help to detoxify the cytosol when plants are challenged by harmful molecules. Despite their large size and multiple important functions, our knowledge of vacuole biogenesis and the machinery underlying their amazing dynamics is still fragmentary. In this review, we try to reconcile past and present models for vacuole biogenesis with the current knowledge of multiple parallel vacuolar trafficking pathways and the molecular machineries driving membrane fusion and organelle shape.
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Affiliation(s)
- Falco Krüger
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, DE-69120 Heidelberg, Germany
| | - Karin Schumacher
- Department of Plant Developmental Biology, Centre for Organismal Studies, Heidelberg University, DE-69120 Heidelberg, Germany.
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40
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Feng QN, Song SJ, Yu SX, Wang JG, Li S, Zhang Y. Adaptor Protein-3-Dependent Vacuolar Trafficking Involves a Subpopulation of COPII and HOPS Tethering Proteins. PLANT PHYSIOLOGY 2017; 174:1609-1620. [PMID: 28559361 PMCID: PMC5490925 DOI: 10.1104/pp.17.00584] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 05/25/2017] [Indexed: 05/20/2023]
Abstract
Plant vacuoles are versatile organelles critical for plant growth and responses to environment. Vacuolar proteins are transported from the endoplasmic reticulum via multiple routes in plants. Two classic routes bear great similarity to other phyla with major regulators known, such as COPII and Rab5 GTPases. By contrast, vacuolar trafficking mediated by adaptor protein-3 (AP-3) or that independent of the Golgi has few recognized cargos and none of the regulators. In search of novel regulators for vacuolar trafficking routes and by using a fluorescence-based forward genetic screen, we demonstrated that the multispan transmembrane protein, Arabidopsis (Arabidopsis thaliana) PROTEIN S-ACYL TRANSFERASE10 (PAT10), is an AP-3-mediated vacuolar cargo. We show that the tonoplast targeting of PAT10 is mediated by the AP-3 complex but independent of the Rab5-mediated post-Golgi trafficking route. We also report that AP-3-mediated vacuolar trafficking involves a subpopulation of COPII and requires the vacuolar tethering complex HOPS. In addition, we have identified two novel mutant alleles of AP-3δ, whose point mutations interfered with the formation of the AP-3 complex as well as its membrane targeting. The results presented here shed new light on the vacuolar trafficking route mediated by AP-3 in plant cells.
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Affiliation(s)
- Qiang-Nan Feng
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Shi-Jian Song
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Shi-Xia Yu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Jia-Gang Wang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Sha Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Yan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
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41
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Konopka-Postupolska D, Clark G. Annexins as Overlooked Regulators of Membrane Trafficking in Plant Cells. Int J Mol Sci 2017; 18:E863. [PMID: 28422051 PMCID: PMC5412444 DOI: 10.3390/ijms18040863] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 04/03/2017] [Accepted: 04/06/2017] [Indexed: 12/11/2022] Open
Abstract
Annexins are an evolutionary conserved superfamily of proteins able to bind membrane phospholipids in a calcium-dependent manner. Their physiological roles are still being intensively examined and it seems that, despite their general structural similarity, individual proteins are specialized toward specific functions. However, due to their general ability to coordinate membranes in a calcium-sensitive fashion they are thought to participate in membrane flow. In this review, we present a summary of the current understanding of cellular transport in plant cells and consider the possible roles of annexins in different stages of vesicular transport.
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Affiliation(s)
- Dorota Konopka-Postupolska
- Plant Biochemistry Department, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland.
| | - Greg Clark
- Molecular, Cell, and Developmental Biology, University of Texas, Austin, TX 78712, USA.
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42
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Dual-targeting of Arabidopsis DMP1 isoforms to the tonoplast and the plasma membrane. PLoS One 2017; 12:e0174062. [PMID: 28384172 PMCID: PMC5383025 DOI: 10.1371/journal.pone.0174062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 03/02/2017] [Indexed: 12/26/2022] Open
Abstract
The reports of dual-targeted proteins in plants have steadily increased over the past years. The vast majority of these proteins are soluble proteins distributed between compartments of the non-secretory pathway, predominantly chloroplasts and mitochondria. In contrast, dual-targeted transmembrane proteins, especially of the secretory pathway, are rare and the mechanisms leading to their differential targeting remain largely unknown. Here, we report dual-targeting of the Arabidopsis DUF679 Membrane Protein 1 (DMP1) to the tonoplast (TP) and the plasma membrane (PM). In Arabidopsis and tobacco two equally abundant DMP1 isoforms are synthesized by alternative translation initiation: a full length protein, DMP1.1, and a truncated one, DMP1.2, which lacks the N-terminal 19 amino acids including a TP-targeting dileucine motif. Accumulation of DMP1.1 and DMP1.2 in the TP and the PM, respectively, is Brefeldin A-sensitive, indicating transit via the Golgi. However, DMP1.2 interacts with DMP1.1, leading to extensive rerouting of DMP1.2 to the TP and “eclipsed” localization of DMP1.2 in the PM where it is barely visible by confocal laser scanning microscopy but clearly detectable by membrane fractionation. It is demonstrated that eGFP fusion to either DMP1 terminus can cause mistargeting artifacts: C-terminal fusion to DMP1.1 or DMP1.2 results in altered ER export and N-terminal fusion to DMP1.1 causes mistargeting to the PM, presumably by masking of the TP targeting signal. These results illustrate how the interplay of alternative translation initiation, presence or absence of targeting information and rerouting due to protein-protein interaction determines the ultimate distribution of a transmembrane protein between two membranes.
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43
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Kaur H, Sparvoli D, Osakada H, Iwamoto M, Haraguchi T, Turkewitz AP. An endosomal syntaxin and the AP-3 complex are required for formation and maturation of candidate lysosome-related secretory organelles (mucocysts) in Tetrahymena thermophila. Mol Biol Cell 2017; 28:1551-1564. [PMID: 28381425 PMCID: PMC5449153 DOI: 10.1091/mbc.e17-01-0018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/22/2017] [Accepted: 03/28/2017] [Indexed: 12/14/2022] Open
Abstract
Lysosome-related organelles (LROs) are secretory organelles formed by convergence between secretory and endosomal trafficking pathways. In Tetrahymena, secretory vesicles that resemble dense core granules are a new class of LROs whose synthesis depends on a conserved syntaxin required for heterotypic fusion and AP-3 for maturation. The ciliate Tetrahymena thermophila synthesizes large secretory vesicles called mucocysts. Mucocyst biosynthesis shares features with dense core granules (DCGs) in animal cells, including proteolytic processing of cargo proteins during maturation. However, other molecular features have suggested relatedness to lysosome-related organelles (LROs). LROs, which include diverse organelles in animals, are formed via convergence of secretory and endocytic trafficking. Here we analyzed Tetrahymena syntaxin 7-like 1 (Stx7l1p), a Qa-SNARE whose homologues in other lineages are linked with vacuoles/LROs. Stx7l1p is targeted to both immature and mature mucocysts and is essential in mucocyst formation. In STX7L1-knockout cells, the two major classes of mucocyst cargo proteins localize independently, accumulating in largely nonoverlapping vesicles. Thus initial formation of immature mucocysts involves heterotypic fusion, in which a subset of mucocyst proteins is delivered via an endolysosomal compartment. Further, we show that subsequent maturation requires AP-3, a complex widely implicated in LRO formation. Knockout of the µ-subunit gene does not impede delivery of any known mucocyst cargo but nonetheless arrests mucocyst maturation. Our data argue that secretory organelles in ciliates may represent a new class of LROs and reveal key roles of an endosomal syntaxin and AP-3 in the assembly of this complex compartment.
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Affiliation(s)
- Harsimran Kaur
- Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637
| | - Daniela Sparvoli
- Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637
| | - Hiroko Osakada
- Advanced ICT Research Institute, National Institute of Information and Communications Technology, Kobe 651-2492, Japan
| | - Masaaki Iwamoto
- Advanced ICT Research Institute, National Institute of Information and Communications Technology, Kobe 651-2492, Japan
| | - Tokuko Haraguchi
- Advanced ICT Research Institute, National Institute of Information and Communications Technology, Kobe 651-2492, Japan.,Graduate School of Frontier Biosciences, Osaka University, Suita 565-0871, Japan
| | - Aaron P Turkewitz
- Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637
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44
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Feng QN, Zhang Y, Li S. Tonoplast targeting of VHA-a3 relies on a Rab5-mediated but Rab7-independent vacuolar trafficking route. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2017; 59:230-233. [PMID: 28198146 DOI: 10.1111/jipb.12526] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 02/09/2017] [Indexed: 06/06/2023]
Abstract
Vacuolar trafficking routes and their regulators have recently drawn lots of attention in plant cell biology. A recent study reported the discovery of a plant-specific vacuolar trafficking route, i.e., a direct ER-to-vacuole route, through analysis of VHA-a3 subcellular targeting, a key component for the tonoplast V-ATPases. Our recent findings showed that VHA-a3 targets to the tonoplast through a Rab5-mediated but Rab7-independent pathway, shedding new lights on the unconventional vacuolar trafficking route in plant cells.
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Affiliation(s)
- Qiang-Nan Feng
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
| | - Yan Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
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45
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Schreiber V, Dersch J, Puzik K, Bäcker O, Liu X, Stork S, Schulz J, Heimerl T, Klingl A, Zauner S, Maier UG. The Central Vacuole of the Diatom Phaeodactylum tricornutum: Identification of New Vacuolar Membrane Proteins and of a Functional Di-leucine-based Targeting Motif. Protist 2017; 168:271-282. [PMID: 28495413 DOI: 10.1016/j.protis.2017.03.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 02/24/2017] [Accepted: 03/04/2017] [Indexed: 01/22/2023]
Abstract
Diatoms are unicellular organisms evolved by secondary endosymbiosis. Although studied in many aspects, the functions of vacuolar-like structures of these organisms are rarely investigated. One of these structures is a dominant central vacuole-like compartment with a marbled phenotype, which is supposed to represent a chrysolaminarin-storing and carbohydrate mobilization compartment. However, other functions as well as targeting of proteins to this compartment are not shown experimentally. In order to study trafficking of membrane proteins to the vacuolar membrane, we scanned the genome for intrinsic vacuolar membrane proteins and used one representative for targeting studies. Our work led to the identification of several proteins located in the vacuolar membrane as well as the sub-compartmentalized localization of one protein. In addition, we show that a di-leucine-based motif is an important signal for correct targeting to the central vacuole of diatoms, like it is in plants.
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Affiliation(s)
| | - Josefine Dersch
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Katharina Puzik
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Oliver Bäcker
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Xiaojuan Liu
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Simone Stork
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Julian Schulz
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Thomas Heimerl
- LOEWE Centre for Synthetic Microbiology (SYNMIKRO), Philipps-Universität Marburg, Germany
| | - Andreas Klingl
- LOEWE Centre for Synthetic Microbiology (SYNMIKRO), Philipps-Universität Marburg, Germany
| | - Stefan Zauner
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany
| | - Uwe G Maier
- Laboratory for Cell Biology, Philipps-Universität Marburg, Germany; LOEWE Centre for Synthetic Microbiology (SYNMIKRO), Philipps-Universität Marburg, Germany.
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46
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Tunc-Ozdemir M, Jones AM. Ligand-induced dynamics of heterotrimeric G protein-coupled receptor-like kinase complexes. PLoS One 2017; 12:e0171854. [PMID: 28187200 PMCID: PMC5302818 DOI: 10.1371/journal.pone.0171854] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 01/26/2017] [Indexed: 02/08/2023] Open
Abstract
Background Arabidopsis, 7-transmembrane Regulator of G signaling protein 1 (AtRGS1) modulates canonical G protein signaling by promoting the inactive state of heterotrimeric G protein complex on the plasma membrane. It is known that plant leucine-rich repeat receptor–like kinases (LRR RLKs) phosphorylate AtRGS1 in vitro but little is known about the in vivo interaction, molecular dynamics, or the cellular consequences of this interaction. Methods Therefore, a subset of the known RLKs that phosphorylate AtRGS1 were selected for elucidation, namely, BAK1, BIR1, FLS2. Several microscopies for both static and dynamic protein-protein interactions were used to follow in vivo interactions between the RLKs and AtRGS1 after the presentation of the Pathogen-associated Molecular Pattern, Flagellin 22 (Flg22). These microscopies included Förster Resonance Energy Transfer, Bimolecular Fluoresence Complementation, and Cross Number and Brightness Fluorescence Correlation Spectroscopy. In addition, reactive oxygen species and calcium changes in living cells were quantitated using luminometry and R-GECO1 microscopy. Results The LRR RLKs BAK1 and BIR1, interact with AtRGS1 at the plasma membrane. The RLK ligand flg22 sets BAK1 in motion toward AtRGS1 and BIR1 away, both returning to the baseline orientations by 10 minutes. The C-terminal tail of AtRGS1 is important for the interaction with BAK1 and for the tempo of the AtRGS1/BIR1 dynamics. This window of time corresponds to the flg22-induced transient production of reactive oxygen species and calcium release which are both attenuated in the rgs1 and the bak1 null mutants. Conclusions A temporal model of these interactions is proposed. flg22 binding induces nearly instantaneous dimerization between FLS2 and BAK1. Phosphorylated BAK1 interacts with and enables AtRGS1 to move away from BIR1 and AtRGS1 becomes phosphorylated leading to its endocytosis thus leading to de-repression by permitting AtGPA1 to exchange GDP for GTP. Finally, the G protein complex becomes dissociated thus AGB1 interacts with its effector proteins leading to changes in reactive oxygen species and calcium.
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Affiliation(s)
- Meral Tunc-Ozdemir
- Department of Biology University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Alan M. Jones
- Department of Biology University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- * E-mail:
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47
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Payne RME, Xu D, Foureau E, Teto Carqueijeiro MIS, Oudin A, de Bernonville TD, Novak V, Burow M, Olsen CE, Jones DM, Tatsis EC, Pendle A, Halkier BA, Geu-Flores F, Courdavault V, Nour-Eldin HH, O’Connor SE. An NPF transporter exports a central monoterpene indole alkaloid intermediate from the vacuole. NATURE PLANTS 2017; 3:16208. [PMID: 28085153 PMCID: PMC5238941 DOI: 10.1038/nplants.2016.208] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 11/29/2016] [Indexed: 05/17/2023]
Abstract
Plants sequester intermediates of metabolic pathways into different cellular compartments, but the mechanisms by which these molecules are transported remain poorly understood. Monoterpene indole alkaloids, a class of specialized metabolites that includes the anticancer agent vincristine, antimalarial quinine and neurotoxin strychnine, are synthesized in several different cellular locations. However, the transporters that control the movement of these biosynthetic intermediates within cellular compartments have not been discovered. Here we present the discovery of a tonoplast localized nitrate/peptide family (NPF) transporter from Catharanthus roseus, CrNPF2.9, that exports strictosidine, the central intermediate of this pathway, into the cytosol from the vacuole. This discovery highlights the role that intracellular localization plays in specialized metabolism, and sets the stage for understanding and controlling the central branch point of this pharmacologically important group of compounds.
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Affiliation(s)
- Richard M. E. Payne
- The John Innes Centre, Department of Biological Chemistry, Norwich Research Park, Norwich NR4 7UK, UK
| | - Deyang Xu
- DynaMo Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Emilien Foureau
- Université François-Rabelais de Tours, EA2106 Biomolécules et Biotechnologies Végétales, Département de Biologie et Physiologie Végétales, UFR Sciences et Techniques, Parc de Grandmont 37200 Tours, France
| | - Marta Ines Soares Teto Carqueijeiro
- Université François-Rabelais de Tours, EA2106 Biomolécules et Biotechnologies Végétales, Département de Biologie et Physiologie Végétales, UFR Sciences et Techniques, Parc de Grandmont 37200 Tours, France
| | - Audrey Oudin
- Université François-Rabelais de Tours, EA2106 Biomolécules et Biotechnologies Végétales, Département de Biologie et Physiologie Végétales, UFR Sciences et Techniques, Parc de Grandmont 37200 Tours, France
| | - Thomas Dugé de Bernonville
- Université François-Rabelais de Tours, EA2106 Biomolécules et Biotechnologies Végétales, Département de Biologie et Physiologie Végétales, UFR Sciences et Techniques, Parc de Grandmont 37200 Tours, France
| | - Vlastimil Novak
- DynaMo Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Meike Burow
- DynaMo Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Carl-Erik Olsen
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - D. Marc Jones
- The John Innes Centre, Department of Computational and Systems Biology, Norwich Research Park, Norwich NR4 7UK, UK
| | - Evangelos C. Tatsis
- The John Innes Centre, Department of Biological Chemistry, Norwich Research Park, Norwich NR4 7UK, UK
| | - Ali Pendle
- The John Innes Centre, Department of Cell and Developmental Biology, Norwich Research Park, Norwich NR4 7UK, UK
| | - Barbara Ann Halkier
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Fernando Geu-Flores
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Vincent Courdavault
- Université François-Rabelais de Tours, EA2106 Biomolécules et Biotechnologies Végétales, Département de Biologie et Physiologie Végétales, UFR Sciences et Techniques, Parc de Grandmont 37200 Tours, France
| | - Hussam Hassan Nour-Eldin
- DynaMo Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Denmark
- Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Sarah E. O’Connor
- The John Innes Centre, Department of Biological Chemistry, Norwich Research Park, Norwich NR4 7UK, UK
- To whom correspondence should be addressed: Sarah E. O’Connor ()
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Wang HJ, Hsu YW, Guo CL, Jane WN, Wang H, Jiang L, Jauh GY. VPS36-Dependent Multivesicular Bodies Are Critical for Plasmamembrane Protein Turnover and Vacuolar Biogenesis. PLANT PHYSIOLOGY 2017; 173:566-581. [PMID: 27879389 PMCID: PMC5210736 DOI: 10.1104/pp.16.01356] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 11/19/2016] [Indexed: 05/18/2023]
Abstract
Most eukaryotic cells target ubiquitinated plasma membrane (PM) proteins for vacuolar degradation in response to environmental and developmental cues. This process involves endosomal sorting complexes required for transport (ESCRT). However, little is known about the cellular mechanisms of ESCRTs in plants. Here, we studied the function of one ESCRT-II component, VPS36, which shows ubiquitin-binding activity and may form a putative ESCRT-II with VPS22 and VPS25 in Arabidopsis (Arabidopsis thaliana). Recessive mutation of the ubiquitously expressed VPS36 causes multiple defects, including delayed embryogenesis, defective root elongation, and limited expansion of cotyledons, and these effects can be complemented by its genomic DNA. Abnormal intracellular compartments containing several membrane transporters, including members of the PIN-FORMEDs, AUXIN RESISTANT 1, and PIP1 families, were found in vps36-1 plants. Employing a genetic approach to cross vps36-1/+ with transgenic plants harboring various fluorescent protein-tagged organelle markers, as well as fluorescent probe and ultrastructural approaches, revealed PM proteins in microsomal fractions from vps36-1 seedlings and demonstrated that VPS36 is critical for forming multivesicular bodies and vacuolar biogenesis for protein degradation. Our study shows that functional VPS36 is essential for a proper endosomal sorting pathway and for vacuolar biogenesis in Arabidopsis.
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Affiliation(s)
- Huei-Jing Wang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.)
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.)
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
| | - Ya-Wen Hsu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.)
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.)
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
| | - Cian-Ling Guo
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.)
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.)
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
| | - Wann-Neng Jane
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.)
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.)
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
| | - Hao Wang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.)
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.)
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
| | - Liwen Jiang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.)
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.)
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
| | - Guang-Yuh Jauh
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan (H.-J.W., Y.-W.H., C.-L.G., W.-N.J., G.-Y.J.);
- School of Life Sciences, Centre for Cell and Developmental Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China (H.W., L.J.);
- Molecular and Biological Agricultural Sciences, Taiwan International Graduate Program, National Chung-Hsing University - Academia Sinica, Taipei, Taiwan (G.-Y.J.); and
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan (G.Y.J.)
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49
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Li Y, Provenzano S, Bliek M, Spelt C, Appelhagen I, Machado de Faria L, Verweij W, Schubert A, Sagasser M, Seidel T, Weisshaar B, Koes R, Quattrocchio F. Evolution of tonoplast P-ATPase transporters involved in vacuolar acidification. THE NEW PHYTOLOGIST 2016; 211:1092-107. [PMID: 27214749 DOI: 10.1111/nph.14008] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 03/07/2016] [Indexed: 05/21/2023]
Abstract
Petunia mutants (Petunia hybrida) with blue flowers defined a novel vacuolar proton pump consisting of two interacting P-ATPases, PH1 and PH5, that hyper-acidify the vacuoles of petal cells. PH5 is similar to plasma membrane H(+) P3A -ATPase, whereas PH1 is the only known eukaryoticP3B -ATPase. As there were no indications that this tonoplast pump is widespread in plants, we investigated the distribution and evolution of PH1 and PH5. We combined database mining and phylogenetic and synteny analyses of PH1- and PH5-like proteins from all kingdoms with functional analyses (mutant complementation and intracellular localization) of homologs from diverse angiosperms. We identified functional PH1 and PH5 homologs in divergent angiosperms. PH5 homologs evolved from plasma membrane P3A -ATPases, acquiring an N-terminal tonoplast-sorting sequence and new cellular function before angiosperms appeared. PH1 is widespread among seed plants and related proteins are found in some groups of bacteria and fungi and in one moss, but is absent in most algae, suggesting that its evolution involved several cases of gene loss and possibly horizontal transfer events. The distribution of PH1 and PH5 in the plant kingdom suggests that vacuolar acidification by P-ATPases appeared in gymnosperms before flowers. This implies that, next to flower color determination, vacuolar hyper-acidification is required for yet unknown processes.
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Affiliation(s)
- Yanbang Li
- Department of Plant Development and (Epi)Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH, Amsterdam, the Netherlands
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
| | - Sofia Provenzano
- Department of Plant Development and (Epi)Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH, Amsterdam, the Netherlands
- Department of Agricultural, Forestry and Food Sciences, University of Turin, 10095, Grugliasco, Italy
| | - Mattijs Bliek
- Department of Plant Development and (Epi)Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH, Amsterdam, the Netherlands
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
| | - Cornelis Spelt
- Department of Plant Development and (Epi)Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH, Amsterdam, the Netherlands
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
| | - Ingo Appelhagen
- Genome Research, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
| | - Laura Machado de Faria
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
| | - Walter Verweij
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
| | - Andrea Schubert
- Department of Agricultural, Forestry and Food Sciences, University of Turin, 10095, Grugliasco, Italy
| | - Martin Sagasser
- Genome Research, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
| | - Thorsten Seidel
- Dynamic Cell Imaging, Faculty of Biology, Bielefeld University, 33501, Bielefeld, Germany
| | - Bernd Weisshaar
- Genome Research, Faculty of Biology, Bielefeld University, 33615, Bielefeld, Germany
| | - Ronald Koes
- Department of Plant Development and (Epi)Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH, Amsterdam, the Netherlands
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
| | - Francesca Quattrocchio
- Department of Plant Development and (Epi)Genetics, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098XH, Amsterdam, the Netherlands
- Department of Molecular and Cell Biology, VU-University, De Boelelaan 1081, 1071 HK, Amsterdam, the Netherlands
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50
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Jiang G, Yin D, Zhao J, Chen H, Guo L, Zhu L, Zhai W. The rice thylakoid membrane-bound ascorbate peroxidase OsAPX8 functions in tolerance to bacterial blight. Sci Rep 2016; 6:26104. [PMID: 27185545 PMCID: PMC4868969 DOI: 10.1038/srep26104] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 04/26/2016] [Indexed: 11/08/2022] Open
Abstract
Thylakoid membrane-bound ascorbate peroxidase (tAPX) is a major H2O2-scavenging enzyme. To clarify its functions in tolerance to rice bacterial blight, we produced rice lines overexpressing and suppressing tAPX (OsAPX8). The overexpressing lines exhibited increased tolerance to bacterial pathogen. The RNA interference (RNAi) lines were considerably more sensitive than the control plant. Further analysis of the H2O2 content in these transgenic plants indicated that the H2O2 accumulation of OsAPX8-overexpressing plants was considerably less than that of wild-type and RNAi plants upon challenge with bacterial pathogen. Interestingly, H2O2 was the most important factor for the serious leaf dehydration and withering of rice without major resistance genes and was not the cause of hypersensitivity. It addition, wall tightening or loosening can occur according to the level of H2O2. In addition, OsAPX8 interacted with the susceptibility protein Os8N3/Xa13, and their binding repressed the reaction of OsAPX8 in tolerance to bacterial blight.
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Affiliation(s)
- Guanghuai Jiang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Dedong Yin
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jiying Zhao
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Honglin Chen
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lequn Guo
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lihuang Zhu
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wenxue Zhai
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
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