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  • Title: Molecular characterization of a novel victorivirus isolated from the phytopathogenic fungus Phaeobotryon rhois.
    Author: Zhao Y, Du H, Liu Y, Zhong R, Guan Z, Wang G, Zhang Y, Wei C, Wang M, Wan X, Zang R, Wen C, Meng H.
    Journal: Arch Virol; 2023 Jan 02; 168(1):15. PubMed ID: 36593368.
    Abstract:
    Phaeobotryon rhois is an important pathogenic fungus that causes dieback and canker disease of woody hosts. A novel mycovirus, tentatively named "Phaeobotryon rhois victorivirus 1" (PrVV1), was identified in P. rhois strain SX8-4. The PrVV1 has a double-stranded RNA (dsRNA) genome that is 5,224 base pairs long and contains two open reading frames (ORF1 and ORF2), which overlap at a AUGA sequence. ORF1 encodes a polypeptide of 786 amino acids (aa) that contains the conserved coat protein (CP) domain of victoriviruses, while ORF2, encodes a large polypeptide of 826 aa that contains the conserved RNA-dependent RNA polymerase (RdRp) domain of victoriviruses. Our analysis of genomic structure, homology, and phylogeny indicated that PrVV1 is a novel member of the genus Victorivirus in the family Totiviridae. This is the first report of the complete genome sequence of a victorivirus that infects P. rhois.
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