A dsRNA virus with filamentous viral particles

Viruses with double-stranded RNA genomes form isometric particles or are capsidless. Here we report a double-stranded RNA virus, Colletotrichum camelliae filamentous virus 1 (CcFV-1) isolated from a fungal pathogen, that forms filamentous particles. CcFV-1 has eight genomic double-stranded RNAs, ranging from 990 to 2444 bp, encoding 10 putative open reading frames, of which open reading frame 1 encodes an RNA-dependent RNA polymerase and open reading frame 4 a capsid protein. When inoculated, the naked CcFV-1 double-stranded RNAs are infectious and induce the accumulation of the filamentous particles in vivo. CcFV-1 is phylogenetically related to Aspergillus fumigatus tetramycovirus-1 and Beauveria bassiana polymycovirus-1, but differs in morphology and in the number of genomic components. CcFV-1 might be an intermediate virus related to truly capsidated viruses, or might represent a distinct encapsidating strategy. In terms of genome and particle architecture, our findings are a significant addition to the knowledge of the virosphere diversity. Viruses with double-stranded RNA (dsRNA) genomes form typically isometric particles or are capsid-less. Here, the authors identify a mycovirus with an eight-segmented dsRNA genome that forms exceptionally long filamentous particles and could represent an evolutionary link between ssRNA and dsRNA viruses.

• Publication year

  2017

• Venue

  Nature Communications

• Publication date

  2017-08-01

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.1038/s41467-017-00237-9PMID 28761042PMCID 5537263
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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