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Han K, Zheng H, Ji M, Cui W, Hu S, Peng J, Zhao J, Lu Y, Lin L, Liu Y, Chen J, Yan F. A single amino acid in coat protein of Pepper mild mottle virus determines its subcellular localization and the chlorosis symptom on leaves of pepper. J Gen Virol 2020; 101:565-570. [PMID: 32149597 PMCID: PMC7414450 DOI: 10.1099/jgv.0.001398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/30/2020] [Indexed: 11/29/2022] Open
Abstract
Pepper mild mottle virus (PMMoV) causes serious economic losses in pepper production in China. In a survey for viral diseases on pepper, two PMMoV isolates (named PMMoV-ZJ1 and PMMoV-ZJ2) were identified with different symptoms in Zhejiang province. Sequence alignment analysis suggested there were only four amino acid differences between the isolates: Val262Gly, Ile629Met and Ala1164Thr in the replicase, and Asp20Asn in the coat protein. Infectious cDNA clones of both isolates were constructed and shown to cause distinctive symptoms. Chlorosis symptoms appeared only on PMMoV-ZJ2-infected plants and the Asp20Asn substitution in the CP was shown to be responsible. Confocal assays revealed that the subcellular localization pattern of the two CPs was different, CP20Asp was mainly located at the cell periphery, whereas most CP20Asn located in the chloroplast. Thus, a single amino acid in the CP determined the chlorosis symptom, accompanied by an altered subcellular localization.
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Affiliation(s)
- Kelei Han
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Hongying Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Mengfei Ji
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Weijun Cui
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Shuzhen Hu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Jiejun Peng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Jinping Zhao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Yuwen Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Lin Lin
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
| | - Yong Liu
- Hunan Institute of Plant Protection, Changsha 410125, PR China
| | - Jianping Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, PR China
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
- Key Laboratory of Biotechnology in Plant Protection of MOA and Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, PR China
| | - Fei Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo, 315211, PR China
- Key Laboratory of Biotechnology in Plant Protection of MOA and Zhejiang Province, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, PR China
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