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Research Support, Non-U.S. Gov'ts
Shift of Phylogenic Position in Megalocytiviruses Based on Three Different Genes
Se Ryun Kwon , Toyohiko Nishizawa , Jong-Won Park , Myung-Joo Oh
J. Microbiol. 2011;49(6):981-986.   Published online December 28, 2011
DOI: https://doi.org/10.1007/s12275-011-1500-8
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AbstractAbstract
Major capsid protein (MCP), the adenosine triphosphatase (ATPase), and the PstI fragment genes from five Japanese and three Korean megalocytivirus isolates were sequenced and phylogenetically analyzed with known megalocytiviruses. Phylogenetic trees formed three major clusters (M1, M2, and M3 or P1, P2, and P3), and genogroup I was divided into two minor clusters (M1a/M1b and P1a/P1b) using three target genes. Sequence identity was >97% within each cluster, except cluster II of the PstI fragment (>94% of sequence identity). Interestingly, different genotyping patterns were observed for the same isolates depending on the gene analyzed. The JPN-YelTail and JPN-BfTuna isolates located in the minor M1a cluster, based on MCP and ATPase nucleotide sequences, appeared in the minor P1b cluster based on the PstI fragment, suggesting a shift of phylogenic position in megalocytiviruses. Further study will be conducted to compare the viral antigenicity and pathogenicity between the two isolates showing the shift of phylogenic position and the other isolates clustered within genogroup I.

Citations

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  • Analysis of the transcriptomic profiles of Mandarin fish (Siniperca chuatsi) infected with red sea bream iridovirus (RSIV)
    Yanbing Zhang, Chunjie Zhang, Zheling Zhang, Wei Sun, Xiaojun Zhang, Xiaodan Liu
    Microbial Pathogenesis.2023; 174: 105921.     CrossRef
  • Detection of megalocytivirus in Oreochromis niloticus and Pseudoplatystoma corruscans in Brazil
    AA Fonseca, M Laguardia-Nascimento, AP Scotá Ferreira, CA Pinto, TR Pereira Freitas, AV Rivetti Júnior, VS Ferreira Homem, MF Camargos
    Diseases of Aquatic Organisms.2022; 149: 25.     CrossRef
  • Multiple Passages of Grunt Fin Cells Persistently Infected with Red Seabream Iridovirus (RSIV) at 15ºC or 30ºC to Yield Uninfected Cells
    So-Young Oh, Toyohiko Nishizawa
    Journal of Aquatic Animal Health.2016; 28(4): 214.     CrossRef
  • Establishment of rock bream Oplegnathus fasciatus embryo (RoBE-4) cells with cytolytic infection of red seabream iridovirus (RSIV)
    So-Young Oh, Toyohiko Nishizawa
    Journal of Virological Methods.2016; 238: 1.     CrossRef
  • Potential for a live red seabream iridovirus (RSIV) vaccine in rock bream Oplegnathus fasciatus at a low rearing temperature
    So-Young Oh, Myung-Joo Oh, Toyohiko Nishizawa
    Vaccine.2014; 32(3): 363.     CrossRef
  • A Novel Disorder of Cultured Juvenile Greater Amberjack Seriola dumerili Characterized by Renomegaly and Splenomegaly
    Shinpei Wada, Osamu Kurata, Hitoshi Hatakeyama, Azumi Yamashita, Shusaku Takagi, Toyohiko Nishizawa, Hiroshi Yokoyama
    Fish Pathology.2014; 49(1): 7.     CrossRef
  • Virions proteins of an RSIV-type megalocytivirus from spotted knifejaw Oplegnathus punctatus (SKIV-ZJ07)
    Fan Shuang, Yongwen Luo, Xiao-peng Xiong, Shaoping Weng, Yiming Li, Jianguo He, Chuanfu Dong
    Virology.2013; 437(2): 89.     CrossRef
  • Viral susceptibility, transfection and growth of SPB – a fish neural progenitor cell line from the brain of snubnose pompano, Trachinotus blochii (Lacépède)
    C‐M Wen, C‐C Ku, C‐S Wang
    Journal of Fish Diseases.2013; 36(7): 657.     CrossRef
  • RSIV is Probably Insensitive to the Transient Innate Immune Response Induced by Administration of Poly(I:C), a Synthetic Double-Stranded RNA
    Jong-Oh Kim, So-Young Oh, Takanori Matsui, Myung-Joo Oh, Toyohiko Nishizawa
    Fish Pathology.2012; 47(4): 137.     CrossRef
Genetic Variation and Geographic Distribution of Megalocytiviruses
Jun-Young Song , Shin-Ichi Kitamura , Sung-Ju Jung , Toshiaki Miyadai , Shinji Tanaka , Yutaka Fukuda , Seok-Ryel Kim , Myung-Joo Oh
J. Microbiol. 2008;46(1):29-33.
DOI: https://doi.org/10.1007/s12275-007-0184-6
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AbstractAbstract
Viruses belonging to the genus Megalocytivirus in the family Iridoviridae have caused mass mortalities in marine and freshwater fish in Asian countries. In this study, partial major capsid protein (MCP) gene of seven Japanese and six Korean megalocytiviruses was sequenced and compared with the known megalocytiviruses to evaluate genetic variation and geographic distribution of the viruses. Comparison of MCP gene nucleotide sequences revealed sequence identity of 92.8% or greater among these 48 isolates. A phylogenetic tree clearly revealed three clusters: genotype I including nine Japanese isolates, thirteen Korean isolates, one Chinese isolates, one Thailand isolate and one South China Sea isolate; genotype II including five freshwater fish isolates in Southeast Asian countries and Australia; and the remaining genotype III mainly consisted of flatfish isolate in Korea and China. This suggests that viruses belonging to the genotype I widely distribute among various fish species in many Asian countries. Conversely, the epidemic viruses belonged to genotype II and III are may be still locally spreading and constrained in their prevalence to the limited host fish species, i.e., genotype II viruses mainly distribute in Southeast Asian countries, whereas genotype III viruses distribute in flatfish species in Korea and China.

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