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<p>Here, we report the identification of a positive-sense single-stranded RNA virus from <i>Ceratobasidium</i> AG-Bo strain LC-JK-2, designated as "Rhizoctonia cerealis alphaendornavirus 2" (RcAEV-2). The complete genome sequence of this virus was determined and found to be 15,244 nt in length with a GC content of 39%. The genome contains a single open reading frame (ORF) encoding an RNA-dependent RNA polymerase (RdRp) of 4974 amino acids (aa) with a predicted molecular weight of 547.14 kDa. BLASTp results showed that the RdRp of RcAEV-2 had the highest amino acid sequence similarity to that of Ceratobasidium endornavirus A (YP_009310113.1). Phylogenetic analysis revealed that RcAEV-2 exhibited the closest evolutionary relationship to Ceratobasidium endornavirus A within the genus <i>Alphaendornavirus</i>, forming a distinct clade separate from other virus families. Thus, RcAEV-2 has been identified as a new member of the genus <i>Alphaendornavirus</i> within the family <i>Endornaviridae</i>.</p>

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Complete genome sequence of a novel endornavirus isolated from Ceratobasidium AG-Bo strain LC-JK-2

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Zifang Zhao,
  • Chengmeng Shen,
  • Xiuyang Tang,
  • Minghuan Wang,
  • Chengyun Li,
  • Yishu Deng,
  • Genhua Yang

摘要

Here, we report the identification of a positive-sense single-stranded RNA virus from Ceratobasidium AG-Bo strain LC-JK-2, designated as "Rhizoctonia cerealis alphaendornavirus 2" (RcAEV-2). The complete genome sequence of this virus was determined and found to be 15,244 nt in length with a GC content of 39%. The genome contains a single open reading frame (ORF) encoding an RNA-dependent RNA polymerase (RdRp) of 4974 amino acids (aa) with a predicted molecular weight of 547.14 kDa. BLASTp results showed that the RdRp of RcAEV-2 had the highest amino acid sequence similarity to that of Ceratobasidium endornavirus A (YP_009310113.1). Phylogenetic analysis revealed that RcAEV-2 exhibited the closest evolutionary relationship to Ceratobasidium endornavirus A within the genus Alphaendornavirus, forming a distinct clade separate from other virus families. Thus, RcAEV-2 has been identified as a new member of the genus Alphaendornavirus within the family Endornaviridae.