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Virus Res ; 285: 197941, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32387400

RESUMO

Helminthosporium victoriae virus 190S (HvV190S) is the type species of the genus Victorivirus under the family Totiviridae. To date, HvV190S has never been found in places outside of the USA and has Helminthosporium victoriae as its only know natural host fungus in the field. Here, we report the identification of 4 double-stranded RNA (dsRNA) viruses from Bipolaris maydis in Hubei province of China. Interestingly, the genomes of the 4 viruses show 81.2 %-85.5 % nucleotide sequence identities to HvV190S. Their capsid protein (CP) and RNA-dependent RNA polymerase (RdRp) share 95.5-97.9 % and 94.6-96.6 % amino acid sequence identities to corresponding proteins of HvV190S. Therefore, the 4 viruses, which show 81.8-87.3 % pairwise genome sequence identities, should be considered as distinct isolates of HvV190S. Our finding suggests that HvV190S is widely distributed in the world and may infect fungal species other than H. victoriae.


Assuntos
Bipolaris/virologia , Totiviridae/isolamento & purificação , Proteínas do Capsídeo/genética , China , Genoma Viral , RNA de Cadeia Dupla , RNA Viral , RNA Polimerase Dependente de RNA/genética
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