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Arch Virol. 2014 Jun;159(6):1321-7. doi: 10.1007/s00705-013-1938-6. Epub 2013 Dec 11.

Molecular characterization of a novel victorivirus from the entomopathogenic fungus Beauveria bassiana.

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Department of Molecular Bioscience, College of Biomedical Science, Kang Won National University, Hyoja Dong, Chun Cheon Si, Kangwon Do, Korea.


New Zealand isolates of the entomopathogenic fungus Beauveria were examined for the presence of dsRNAs and virus-like particles. Seven out of nine isolates contained one or more high-molecular-weight dsRNAs and all seven contained isometric virus particles ranging in size from 30 to 50 nm. B. bassiana isolate ICMP#6887 contained a single dsRNA band of ~6 kb and isometric virus-like particles of ~50 nm in diameter. Sequencing revealed that the virus from ICMP#6887 had a genome of 5,327 nt with two overlapping ORFs coding for a putative coat protein (CP) and an RNA-dependent RNA-polymerase (RdRp). The sequence showed a highest CP identity of 58.3 % to Tolypocladium cylindrosporum virus 1 (TcV1) and a highest RdRp identity of 48.8 % to Sphaeropsis sapinea RNA virus 1 (SsRV1). Since both TcV1 and SsRV1 belong to the genus Victorivirus, the new virus from B. bassiana ICMP#6887 was tentatively assigned the name Beauveria bassiana victorivirus 1 (BbVV1-6887).

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