Complete genome sequence of a novel mitovirus isolated from the fungus Fusarium equiseti causing potato dry rot

Archives of Virology - Tập 167 Số 12 - Trang 2777-2781 - 2022
Zhang, Xiaofang1, Li, Siwei1, Ma, Zhihao1, Cai, Qingnian1, Zhou, Tao1, Wu, Xuehong1
1College of Plant Protection, China Agricultural University, Beijing, People’s Republic of China

Tóm tắt

In this study, a novel mitovirus was isolated from the fungus Fusarium equiseti causing potato dry rot and tentatively designated as "Fusarium equiseti mitovirus 1" (FeMV1). The full-length genome sequence of FeMV1 consists of 2,459 nucleotides with a predicted A + U content of 69.5%. Using the mold mitochondrial genetic code, an open reading frame (ORF) of 725 amino acids (aa) was predicted to encode an RNA-dependent RNA polymerase (RdRp). The RdRp protein contains six conserved motifs, with the highly conserved GDD in motif IV, and the 5’-untranslated region (UTR) and 3’-UTR of FeMV1 have the potential to fold into stem-loop secondary structures and a panhandle structure, both of which are typical characteristics of members of the family Mitoviridae. Results of a BLASTp search showed that the RdRp aa sequence of FeMV1 shared the highest sequence similarity with that of Fusarium poae mitovirus 2 (FpMV2) (76.84% identity, E-value = 0.0). Phylogenetic analysis based on the complete aa sequence of RdRp further suggested that FeMV1 is a new member of the family Mitoviridae. This is the first report of the complete genome sequence analysis of a mitovirus associated with F. equiseti.

Tài liệu tham khảo

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