Genetic analysis of a porcine reproductive and respiratory syndrome virus 1 strain in China with new patterns of amino acid deletions in nsp2, GP3 and GP4. (December 2020)

• Record Type: Journal Article
• Authors: Zhang, Qiaoya; Song, Zhongbao; Yu, Ying; Huang, Juan; Jiang, Ping; Shan, Hu
• Is Part Of: Microbial pathogenesis. Volume 149(2020)
• Publication Date: 2020-12
• Subjects: Chinese porcine reproductive and respiratory syndrome virus 1 (PRRSV 1) -- Genetic evolution -- Amino acid (aa) deletion -- Immune cell epitopes; Pathogenic microorganisms -- Periodicals; Pathology, Molecular -- Periodicals; Communicable Diseases -- microbiology -- Periodicals; Communicable Diseases -- parasitology -- Periodicals; Micro-organismes pathogènes -- Périodiques; Pathologie moléculaire -- Périodiques; Electronic journals; 616.9041
• DOI: 10.1016/j.micpath.2020.104531
• Languages: English
• ISSNs: 0882-4010

Abstract

Abstract: Porcine reproductive and respiratory syndrome virus (PRRSV) 1 and PRRSV 2 have coexisted in China for a very long time. In this study, the complete genomic characterization of a PRRSV 1 strain named KZ2018 was conducted. The results showed that it shared 88.6% identity with Lelystad virus and 81.9–90.8% identities with other Chinese PRRSV 1 strains. Further study showed that its nsp2 protein had a unique discontinuous 6-amino acid (aa) deletion (aa357-360+aa411+aa449). Additionally, its GP3 and GP4 contained a long continuous 18-aa deletion in their overlapped region, which has never been described in other Chinese PRRSV 1 isolates. Amino acid analysis of cell epitopes revealed that GP3245-256 and GP457-68 were the most variable epitopes among different Chinese PRRSV 1 isolates. The results might enrich our knowledge of PRRSV 1 strains in China. Highlights: Chinese PRRSV 1 strain KZ2018 had a unique discontinuous 6-aa deletion in nsp2. KZ2018 strain had the longest 18-aa deletion in overlapping region of GP3 and GP4. GP3245-256 and GP457-68 were most variable epitopes among Chinese PRRSV 1 strains.