A single amino acid in coat protein of Pepper mild mottle virus determines its subcellular localization and the chlorosis symptom on leaves of pepper. (9th May 2020)

• Record Type: Journal Article
• Authors: Han, Kelei; Zheng, Hongying; Ji, Mengfei; Cui, Weijun; Hu, Shuzhen; Peng, Jiejun; Zhao, Jinping; Lu, Yuwen; Lin, Lin; Liu, Yong; Chen, Jianping; Yan, Fei
• Is Part Of: Journal of general virology. Volume 101:Number 5(2020)
• Page Start: 565
• Page End: 570
• Publication Date: 2020-05-09
• Subjects: Pepper mild mottle virus -- coat protein -- subcellular localization -- chlorosis; Virology -- Periodicals; Viruses; Microbiology; Virology; Virologie -- Périodiques; Microbiologie -- Périodiques; Virology; Virologie; Virologie; Electronic journals; Periodical; Periodicals; 579.2
• DOI: 10.1099/jgv.0.001398
• Languages: English
• ISSNs: 0022-1317

Abstract

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, CP 20Asp was mainly located at the cell periphery, whereas most CP 20Asn located in the chloroplast. Thus, a single amino acid in the CP determined the chlorosis symptom, accompanied by an altered subcellular localization.