Complete genome sequence of a novel fusarivirus from the phytopathogenic fungus Corynespora cassiicola

文献类型： 外文期刊

第一作者： Liu, Mingming

作者： Liu, Mingming;Liu, Xintao;Zhao, Hui;Ni, Yunxia;Jia, Min;Hu, Peilin;Liu, Hongyan;Liu, Mingming;Hu, Peilin;Liu, Hongyan;Tian, Baoming

作者机构：

期刊名称：ARCHIVES OF VIROLOGY （ 影响因子：2.685； 五年影响因子：2.506 ）

ISSN： 0304-8608

年卷期： 2022 年 167 卷 5 期

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收录情况： SCI

摘要： Corynespora cassiicola is an important phytopathogenic fungus that severely impairs crop production. Here, we report the molecular characterization of a novel positive-sense single-stranded RNA (+ssRNA) mycovirus, Corynespora cassiicola fusarivirus 1 (CcFV1), isolated from C. cassiicola strain 20200826-3-1. Excluding the poly(A) tail, the genome of the virus is 6491 nt in length and contains three putative open reading frames (ORFs). The large ORF1 encodes a polypeptide of 1524 aa with a conserved RNA-dependent RNA polymerase (RdRp) domain and a helicase (Hel) domain. BLASTp analysis showed that CcFV1 ORF1 has the highest similarity to Setosphaeria turcica fusarivirus 1 (StFV1, 50.45% identity, E-value 0.0). ORF2 encodes a polypeptide with a conserved chromosome segregation ATPase (Smc) domain. The smaller ORF3 encodes a polypeptide with an unknown function. Phylogenetic analysis based on the ORF1- encoded polypeptide showed that CcFV1 is phylogenetically related to members of the newly proposed family "Fusariviridae". Thus, we suggest that CcFV1 might be a novel member of the family "Fusariviridae", and is the first to be discovered in C. cassiicola.

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