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<p>In this study, we isolated two novel mitoviruses co-infecting the fungus <i>Gnomoniopsis sanguisorbae</i>, which were designated as “Gnomoniopsis sanguisorbae mitovirus L” (GsMV-L) and “Gnomoniopsis sanguisorbae mitovirus M” (GsMV-M). The complete genome lengths of GsMV-L and GsMV-M were determined to be 2,785 and 2,529 nucleotides, respectively, with a GC content of 44% and 35%, respectively. Both viruses possess a single open reading frame (ORF) that encodes an RNA-dependent RNA polymerase (RdRp) containing conserved catalytic motifs. BLASTp analysis revealed that the RdRps of GsMV-L and GsMV-M exhibited the highest amino acid sequence similarity to those of sunflower phomopsis-associated mitovirus 1 and Phomopsis viticola mitovirus 962_1, with 50.97% and 41.97% identity, respectively. Phylogenetic analysis based on RdRp sequences indicated that GsMV-L clustered with members of the genus <i>Triamitovirus</i>, while GsMV-M clustered with members of the genus <i>Unuamitovirus</i>, both of which are taxonomically classified within the family <i>Mitoviridae</i>. </p>

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Two novel mitoviruses isolated from the filamentous fungus Gnomoniopsis sanguisorbae

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Zhenmei Song,
  • Juan Yang,
  • Lina Zeng,
  • Hongmei Liu,
  • Lu Liang,
  • Tingting Zhang

摘要

In this study, we isolated two novel mitoviruses co-infecting the fungus Gnomoniopsis sanguisorbae, which were designated as “Gnomoniopsis sanguisorbae mitovirus L” (GsMV-L) and “Gnomoniopsis sanguisorbae mitovirus M” (GsMV-M). The complete genome lengths of GsMV-L and GsMV-M were determined to be 2,785 and 2,529 nucleotides, respectively, with a GC content of 44% and 35%, respectively. Both viruses possess a single open reading frame (ORF) that encodes an RNA-dependent RNA polymerase (RdRp) containing conserved catalytic motifs. BLASTp analysis revealed that the RdRps of GsMV-L and GsMV-M exhibited the highest amino acid sequence similarity to those of sunflower phomopsis-associated mitovirus 1 and Phomopsis viticola mitovirus 962_1, with 50.97% and 41.97% identity, respectively. Phylogenetic analysis based on RdRp sequences indicated that GsMV-L clustered with members of the genus Triamitovirus, while GsMV-M clustered with members of the genus Unuamitovirus, both of which are taxonomically classified within the family Mitoviridae.