1
|
Yu Y, Zhang J, Wang J, Xi J, Zhang X, Li P, Liu Y, Liu W. Naturally-occurring right terminal hairpin mutations in three genotypes of canine parvovirus (CPV-2a, CPV-2b and CPV-2c) have no effect on their growth characteristics. Virus Res 2019; 261:31-6. [PMID: 30557578 DOI: 10.1016/j.virusres.2018.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/11/2018] [Accepted: 12/13/2018] [Indexed: 11/20/2022]
Abstract
We have isolated 4 naturally-occurring strains of CPV in mainland China and have identified them as CPV-2, 2a, 2b and 2c genotypes according to their VP2 sequences which also revealed substitutions within their right terminal regions. To determine if these substitutions affected the growth characteristics of the 4 strains, we constructed plasmids based on their genomic sequences minus their right terminal sequences, with the latter replaced by a single right terminal region. Analysis of rescued recombinants showed that the substitutions within their natural right termini had no significant effect on their growth characteristics.
Collapse
|
2
|
Wang J, Ling J, Wang Z, Huang Y, Zhu J, Zhu G. Molecular characterization of a novel Muscovy duck parvovirus isolate: evidence of recombination between classical MDPV and goose parvovirus strains. BMC Vet Res 2017; 13:327. [PMID: 29121936 PMCID: PMC5680767 DOI: 10.1186/s12917-017-1238-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 10/30/2017] [Indexed: 11/15/2022] Open
Abstract
Background Muscovy duck parvovirus (MDPV) and Goose parvovirus (GPV) are important etiological agents for Muscovy duck parvoviral disease and Derzsy’s disease, respectively; both of which can cause substantial economic losses in waterfowl industry. In contrast to GPV, the complete genomic sequence data of MDPV isolates are still limited and their phylogenetic relationships largely remain unknown. In this study, the entire genome of a pathogenic MDPV strain ZW, which was isolated from a deceased Muscovy duckling in 2006 in China, was cloned, sequenced, and compared with that of other classical MDPV and GPV strains. Results The genome of strain ZW comprises of 5071 nucleotides; this genome was shorter than that of the pathogenic MDPV strain YY (5075 nt). All the four deleted nucleotides produced in strain ZW are located at the base-pairing positions in the palindromic stem of inverted terminal repeats (ITR) without influencing the formation of a hairpin structure. Recombination analysis revealed that strain ZW originated from genetic recombination between the classical MDPV and GPV strain. The YY strain of MDPV acts as the major parent, whereas the virulent strains YZ99–6 and B and the vaccine strain SYG61v of GPV act as the minor parents in varying degrees. Two recombination sites were detected in strain ZW, with the small recombination site surrounding the P9 promoter, and the large recombination site situated in the middle of the VP3 gene. The SYG61V strain is a vaccine strain used for preventing goose parvoviral disease. This strain was found to be solely involved in the recombination event detected in the P9 promoter region. Phylogenetic analyses between strain ZW and other classical strains of MDPV and GPV were performed. The results supported the in silico recombination analysis conclusion. Conclusions MDPV Strain ZW is a novel recombinant parvovirus, and the bulk of its genome originates from the classical MDPV strain. Two virulent strains and a vaccine strain of GPV were involved in the recombination process in varying degrees.
Collapse
Affiliation(s)
- Jianye Wang
- College of Veterinary Medicine, Yangzhou University, 48 Wenhui East Road, 225009, Yangzhou, Jiangsu Province, People's Republic of China. .,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China.
| | - Jueyi Ling
- College of Veterinary Medicine, Yangzhou University, 48 Wenhui East Road, 225009, Yangzhou, Jiangsu Province, People's Republic of China.,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China
| | - Zhixian Wang
- College of Veterinary Medicine, Yangzhou University, 48 Wenhui East Road, 225009, Yangzhou, Jiangsu Province, People's Republic of China.,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China
| | - Yu Huang
- College of Veterinary Medicine, Yangzhou University, 48 Wenhui East Road, 225009, Yangzhou, Jiangsu Province, People's Republic of China.,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China
| | - Jianzhong Zhu
- College of Veterinary Medicine, Yangzhou University, 48 Wenhui East Road, 225009, Yangzhou, Jiangsu Province, People's Republic of China.,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China
| | - Guoqiang Zhu
- College of Veterinary Medicine, Yangzhou University, 48 Wenhui East Road, 225009, Yangzhou, Jiangsu Province, People's Republic of China. .,Jiangsu Co-Innovation Center for Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China.
| |
Collapse
|