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  • Title: Molecular characterization of a novel ourmia‑like virus from the phytopathogenic fungus Botryosphaeria dothidea.
    Author: Song X, Cao J, Xie S, Wang Y, Yin X, Guo Y, Xu C, Guo L, Wu H, Zhang M.
    Journal: Arch Virol; 2023 Mar 11; 168(4):106. PubMed ID: 36899128.
    Abstract:
    Here, we describe a novel ourmia-like virus, Botryosphaeria dothidea ourmia-like virus 2 (BdOLV2), derived from the phytopathogenic fungus Botryosphaeria dothidea strain ZM180192-1 infecting maize in Henan province of China. The complete genome sequence of BdOLV2 consists of a positive-sense single-stranded RNA (+ ssRNA) segment with a length of 2,532 nucleotides (nt). The sequence contains a large open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) consisting of 605 amino acids (aa) with a molecular mass of 68.59 kDa. This RdRp protein contains eight typical conserved motifs associated with ourmia-like viruses. BLASTp analysis revealed that the RdRp protein of BdOLV2 had the highest similarity (62.10%, 58.15%, and 55.75% identity, respectively) to a virus previously identified as "Botourmiaviridae sp.", Macrophomina phaseolina ourmia-like virus 2, and Macrophomina phaseolina ourmia-like virus 2-A. Phylogenetic analysis based on the RdRp aa sequence indicated that BdOLV2 is a new member of the genus Magoulivirus in the family Botourmiaviridae.
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