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Chen D, Zhang HY, Hu SM, He Z, Wu YQ, Zhang ZY, Wang Y, Han CG. The P2 protein of wheat yellow mosaic virus acts as a viral suppressor of RNA silencing in Nicotiana benthamiana to facilitate virus infection. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39016637 DOI: 10.1111/pce.15041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/18/2024] [Accepted: 07/08/2024] [Indexed: 07/18/2024]
Abstract
Wheat yellow mosaic virus (WYMV) causes severe viral wheat disease in Asia. The WYMV P1 protein encoded by RNA2 has viral suppressor of RNA silencing (VSR) activity to facilitate virus infection, however, VSR activity has not been identified for P2 protein encoded by RNA2. In this study, P2 protein exhibited strong VSR activity in Nicotiana benthamiana at the four-leaf stage, and point mutants P70A and G230A lost VSR activity. Protein P2 interacted with calmodulin (CaM) protein, a gene-silencing associated protein, while point mutants P70A and G230A did not interact with it. Competitive bimolecular fluorescence complementation and competitive co-immunoprecipitation experiments showed that P2 interfered with the interaction between CaM and calmodulin-binding transcription activator 3 (CAMTA3), but the point mutants P70A and G230A could not. Mechanical inoculation of wheat with in vitro transcripts of WYMV infectious cDNA clone further confirmed that VSR-deficient mutants P70A and G230A decreased WYMV infection in wheat plants compared with the wild type. In addition, RNA silencing, temperature, ubiquitination and autophagy had significant effects on accumulation of P2 protein in N. benthamiana leaves. In conclusion, WYMV P2 plays a VSR role in N. benthamiana and promotes virus infection by interfering with calmodulin-related antiviral RNAi defense.
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Affiliation(s)
- Dao Chen
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Hui-Ying Zhang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Shu-Ming Hu
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Zheng He
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Yong Qi Wu
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Zong-Ying Zhang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Ying Wang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
| | - Cheng-Gui Han
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and College of Plant Protection, China Agricultural University, Beijing, China
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Chen D, Zhang HY, Hu SM, Tian MY, Zhang ZY, Wang Y, Sun LY, Han CG. The P1 protein of wheat yellow mosaic virus exerts RNA silencing suppression activity to facilitate virus infection in wheat plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 116:1717-1736. [PMID: 37751381 DOI: 10.1111/tpj.16461] [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: 04/15/2023] [Revised: 08/07/2023] [Accepted: 08/29/2023] [Indexed: 09/28/2023]
Abstract
Wheat yellow mosaic virus (WYMV) causes severe wheat viral disease in Asia. However, the viral suppressor of RNA silencing (VSR) encoded by WYMV has not been identified. Here, the P1 protein encoded by WYMV RNA2 was shown to suppress RNA silencing in Nicotiana benthamiana. Mutagenesis assays revealed that the alanine substitution mutant G175A of P1 abolished VSR activity and mutant Y10A VSR activity remained only in younger leaves. P1, but not G175A, interacted with gene silencing-related protein, N. benthamiana calmodulin-like protein (NbCaM), and calmodulin-binding transcription activator 3 (NbCAMTA3), and Y10A interacted with NbCAMTA3 only. Competitive Bimolecular fluorescence complementation and co-immunoprecipitation assays showed that the ability of P1 disturbing the interaction between NbCaM and NbCAMTA3 was stronger than Y10A, Y10A was stronger than G175A. In vitro transcript inoculation of infectious WYMV clones further demonstrated that VSR-defective mutants G175A and Y10A reduced WYMV infection in wheat (Triticum aestivum L.), G175A had a more significant effect on virus accumulation in upper leaves of wheat than Y10A. Moreover, RNA silencing, temperature, and autophagy have significant effects on the accumulation of P1 in N. benthamiana. Taken together, WYMV P1 acts as VSR by interfering with calmodulin-associated antiviral RNAi defense to facilitate virus infection in wheat, which has provided clear insights into the function of P1 in the process of WYMV infection.
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Affiliation(s)
- Dao Chen
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, and State Key Laboratory of Agricultural Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Hui-Ying Zhang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, and State Key Laboratory of Agricultural Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Shu-Ming Hu
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, and State Key Laboratory of Agricultural Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Meng-Yuan Tian
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Xianyang, 712100, China
| | - Zong-Ying Zhang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, and State Key Laboratory of Agricultural Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Ying Wang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, and State Key Laboratory of Agricultural Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Li-Ying Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Plant Protection, Northwest A&F University, Xianyang, 712100, China
| | - Cheng-Gui Han
- Ministry of Agriculture and Rural Affairs Key Laboratory of Pest Monitoring and Green Management, and State Key Laboratory of Agricultural Biotechnology, China Agricultural University, Beijing, 100193, China
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Construction and biological characterization of an infectious full-length cDNA clone of a Chinese isolate of Wheat yellow mosaic virus. Virology 2021; 556:101-109. [PMID: 33561697 DOI: 10.1016/j.virol.2021.01.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 12/22/2022]
Abstract
Wheat yellow mosaic virus (family Potyviridae; genus Bymovirus), is an important soil-borne virus that causes serious economic losses in wheat. In this study, we constructed infectious cDNA clones of WYMV genomic RNAs under the control of 35S or SP6 promoter for versatile usage (agroinfiltration or in vitro RNA transcription). Our results showed that an Agrobacterium-mediated inoculation system enabled WYMV to infect the leaves of Nicotiana benthamiana without causing WYMV systemic infection. However, in vitro transcripts from infectious cDNA clones using the SP6 promoter promoted WYMV systemic infection of wheat plants, which was then developed for further assays. The optimal temperature for virus multiplication and systemic infection of wheat was 8 °C. Additionally, a synergistic effect between WYMV and Chinese wheat mosaic virus (CWMV) was also detected. This is the first report of the construction of a Chinese isolate of WYMV and should facilitate the investigation of viral pathogenesis.
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Jiang C, Kan J, Ordon F, Perovic D, Yang P. Bymovirus-induced yellow mosaic diseases in barley and wheat: viruses, genetic resistances and functional aspects. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:1623-1640. [PMID: 32008056 DOI: 10.1007/s00122-020-03555-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 01/24/2020] [Indexed: 05/20/2023]
Abstract
Bymovirus-induced yellow mosaic diseases seriously threaten global production of autumn-sown barley and wheat, which are two of the presently most important crops around the world. Under natural field conditions, the diseases are caused by infection of soil-borne plasmodiophorid Polymyxa graminis-transmitted bymoviruses of the genus Bymovirus of the family Potyviridae. Focusing on barley and wheat, this article summarizes the achievements on taxonomy, geography and host specificity of these disease-conferring viruses, as well as the genetics of resistance in barley, wheat and wild relatives. Moreover, based on recent progress of barley and wheat genomics, germplasm resources and large-scale sequencing, the exploration and isolation of corresponding resistant genes from wheat and barley as well as relatives, no matter what a large and complicated genome is present, are becoming feasible and are discussed. Furthermore, the foreseen advances on cloning of the resistance or susceptibility-encoding genes, which will provide the possibility to explore the functional interaction between host plants and soil-borne viral pathogens, are discussed as well as the benefits for marker-assisted resistance breeding in barley and wheat.
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Affiliation(s)
- Congcong Jiang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, People's Republic of China
| | - Jinhong Kan
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, People's Republic of China
| | - Frank Ordon
- Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Julius Kühn-Institute (JKI), 06484, Quedlinburg, Germany
| | - Dragan Perovic
- Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Julius Kühn-Institute (JKI), 06484, Quedlinburg, Germany
| | - Ping Yang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, People's Republic of China.
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Gu J, Sun J, Liu N, Sun X, Liu C, Wu L, Liu G, Zeng F, Hou C, Han S, Zhen W, Wang D. A novel cysteine-rich receptor-like kinase gene, TaCRK2, contributes to leaf rust resistance in wheat. MOLECULAR PLANT PATHOLOGY 2020; 21:732-746. [PMID: 32196909 PMCID: PMC7170779 DOI: 10.1111/mpp.12929] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/13/2020] [Accepted: 02/13/2020] [Indexed: 05/04/2023]
Abstract
Leaf rust, caused by Puccinia triticina, is one of the most destructive fungal diseases in wheat production worldwide. The hypersensitive reaction (HR) is an important defence response against P. triticina infection. In this study, the physiological races 165 and 260 of P. triticina were combined with a line derived from the bread wheat cultivar Thatcher with the leaf rust resistance locus Lr26 to form compatible and incompatible combinations, respectively. Based on an RNA-Seq database of the interaction systems, a new wheat cysteine-rich receptor-like kinase gene, TaCRK2, is specifically induced and up-regulated in the incompatible combination. We identified that TaCRK2 was regulated in a Ca2+ -dependent manner. Knockdown of TaCRK2 by virus-induced gene silencing and RNAi leads to a dramatic increase in HR area and the number of haustorial mother cells at the single infection site. In addition, urediniospores, a P. triticina-specific pathogenic marker in compatible combinations, were observed on leaf surfaces of silenced plants at approximately 15 days after inoculation in the incompatible combination. Moreover, transcription levels of TaPR1, TaPR2, and TaPR5 were obviously reduced in TaCRK2-silenced plants. TaCRK2 overexpression in Nicotiana benthamiana induced strong HR-like cell death. Finally, transient expression of green fluorescent protein fused with TaCRK2 in N. benthamiana indicated that TaCRK2 localizes in the endoplasmic reticulum. Thus, TaCRK2 plays an important role in the resistance to P. triticina infection and has a positive regulation effect on the HR cell death process induced by P. triticina.
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Affiliation(s)
- Jia Gu
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Jiawei Sun
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Na Liu
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Xizhe Sun
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | | | - Lizhu Wu
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Gang Liu
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Fanli Zeng
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Chunyan Hou
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Shengfang Han
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
| | - Wenchao Zhen
- Key Laboratory of Regulation and Control of Crop Growth of HebeiCollege of AgronomyHebei Agriculture UniversityBaodingChina
| | - Dongmei Wang
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Hebei Province for Plant Physiology and Molecular PathologyCollege of Life SciencesHebei Agriculture UniversityBaodingChina
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Xie L, Song XJ, Liao ZF, Wu B, Yang J, Zhang H, Hong J. Endoplasmic reticulum remodeling induced by Wheat yellow mosaic virus infection studied by transmission electron microscopy. Micron 2019; 120:80-90. [PMID: 30807983 DOI: 10.1016/j.micron.2019.01.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/16/2019] [Accepted: 01/22/2019] [Indexed: 11/28/2022]
Abstract
Plant virus was a kind of organism lived depending on infecting viable host cell and propagated their posterity by replicating its hereditary nucleotide, transcripting into protein, assembling protein and nucleotide into virion (Ortín and Parra, 2006; Sanfaçon, 2005). Viral infection usually induces remodeling of host cell, especially endoplasmic reticulum (ER) for generating membrane packed viral factory. During the infection of Bymovirus, a kind of membranous body (MB) was generated in host cells, which is thought as an ER aggregate. In present study we performed a study on Wheat yellow mosaic virus (WYMV) induced MB by several transmission electron microscopy (TEM) based methods, including cytological observation, component analysis by immuno-gold labeling and structural analysis by electron tomography (ET). WYMV infection induced at least two morphologies of MB, including the lamella dominated morphology (lamella-MB) looked like sprawling cirrus, and the tubule dominated morphology (tubule-MB) looked like latticed network. MB was verified composing of ER as revealed by immuno-gold labeling by antibody against endoplasmic reticulum (ER) retention signal as well as by detailed observation of MB construction modules as double layer membrane. By immuno-gold labeling, both two MB morphologies (lamella-MB and tubule-MB) had same components in viral derived protein and membrane origination (from ER). Structural analysis by ET reconstruction revealed the organization of ER in MB. Lamella-MB was composed of cesER like structures arranged irregularly whereas tubule-MB was composed of tubER like structures arranged regularly. This study provided insights into the structural details in how Bymovirus utilizing host membrane system.
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Affiliation(s)
- Li Xie
- Analysis Center of Agrobiology and Environmental Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Xi-Jiao Song
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of Agriculture Key Laboratory of Biotechnology in Plant Protection, Zhejiang Provincial Key Laboratory of Plant Virology, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Zhen-Feng Liao
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of Agriculture Key Laboratory of Biotechnology in Plant Protection, Zhejiang Provincial Key Laboratory of Plant Virology, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Bin Wu
- Institute of plant protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China.
| | - Jian Yang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of Agriculture Key Laboratory of Biotechnology in Plant Protection, Zhejiang Provincial Key Laboratory of Plant Virology, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Hengmu Zhang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of Agriculture Key Laboratory of Biotechnology in Plant Protection, Zhejiang Provincial Key Laboratory of Plant Virology, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Jian Hong
- Analysis Center of Agrobiology and Environmental Sciences, Zhejiang University, Hangzhou 310058, China.
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Triticum aestivum heat shock protein 23.6 interacts with the coat protein of wheat yellow mosaic virus. Virus Genes 2018; 55:209-217. [DOI: 10.1007/s11262-018-1626-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 12/12/2018] [Indexed: 10/27/2022]
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Wang N, Yang H, Yin Z, Liu W, Sun L, Wu Y. Phytoplasma effector SWP1 induces witches' broom symptom by destabilizing the TCP transcription factor BRANCHED1. MOLECULAR PLANT PATHOLOGY 2018; 19:2623-2634. [PMID: 30047227 PMCID: PMC6638060 DOI: 10.1111/mpp.12733] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 06/28/2018] [Accepted: 07/21/2018] [Indexed: 05/18/2023]
Abstract
Phytoplasmas are insect-transmitted phytopathogenic bacteria, which secrete effector proteins that are often responsible for altering the plant morphology and behaviours of their vectors. Phytoplasma multifunctional effector proteins TENGU and SAP11 induce typical witches' broom symptoms, but their mode of action remains unknown. Previously, we have identified a SAP11-like effector from wheat blue dwarf phytoplasma, SWP1, which induces witches' broom symptoms in Nicotiana benthamiana. In this study, we observed that SWP1-expressing transgenic Arabidopsis thaliana plants showed typical witches' broom symptoms. On overexpression of SWP1 truncation mutants in N. benthamiana, we identified that the coiled-coil domain and nuclear localization were responsible for the induction of witches' broom symptoms. In addition, using yeast two-hybrid and bimolecular fluorescence complementation assays, we demonstrated that SWP1 interacts with A. thaliana transcription factor TCP18 (BRC1), the key negative regulator of branching signals in various plant species. Moreover, in planta co-expression analysis showed that SWP1 promotes the degradation of BRC1 via a proteasome system. These findings suggest that the phytoplasma effector SWP1 induces witches' broom symptoms through targeting of BRC1 and promoting its degradation.
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Affiliation(s)
- Nan Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYangling712100China
| | - Haizhen Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYangling712100China
| | - Zhiyuan Yin
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYangling712100China
| | - Wenting Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYangling712100China
| | - Liying Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYangling712100China
| | - Yunfeng Wu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant ProtectionNorthwest A&F UniversityYangling712100China
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Sun L, Andika IB, Shen J, Yang D, Chen J. The P2 of Wheat yellow mosaic virus rearranges the endoplasmic reticulum and recruits other viral proteins into replication-associated inclusion bodies. MOLECULAR PLANT PATHOLOGY 2014; 15:466-78. [PMID: 24304930 PMCID: PMC6638913 DOI: 10.1111/mpp.12109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Viruses commonly modify host endomembranes to facilitate biological processes in the viral life cycle. Infection by viruses belonging to the genus Bymovirus (family Potyviridae) has long been known to induce the formation of large membranous inclusion bodies in host cells, but their assembly and biological roles are still unclear. Immunoelectron microscopy of cells infected with the bymovirus Wheat yellow mosaic virus (WYMV) showed that P1, P2 and P3 are the major viral protein constituents of the membranous inclusions, whereas NIa-Pro (nuclear inclusion-a protease) and VPg (viral protein genome-linked) are probable minor components. P1, P2 and P3 associated with the endoplasmic reticulum (ER), but only P2 was able to rearrange ER and form large aggregate structures. Bioinformatic analyses and chemical experiments showed that P2 is an integral membrane protein and depends on the active secretory pathway to form aggregates of ER membranes. In planta and in vitro assays demonstrated that P2 interacts with P1, P3, NIa-Pro or VPg and recruits these proteins into the aggregates. In vivo RNA labelling using WYMV-infected wheat protoplasts showed that the synthesis of viral RNAs occurs in the P2-associated inclusions. Our results suggest that P2 plays a major role in the formation of membranous compartments that house the genomic replication of WYMV.
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Affiliation(s)
- Liying Sun
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, MoA Key Laboratory for Plant Protection and Biotechnology, Zhejiang Provincial Key Laboratory of Plant Virology, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
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