A dsRNA virus with filamentous viral particles

Hengxia Jia, Kaili Dong, Lingling Zhou, Guoping Wang, Ni Hong, Daohong Jiang and Wenxing Xu ()
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Hengxia Jia: State Key Laboratory of Agricultural Microbiology
Kaili Dong: State Key Laboratory of Agricultural Microbiology
Lingling Zhou: State Key Laboratory of Agricultural Microbiology
Guoping Wang: State Key Laboratory of Agricultural Microbiology
Ni Hong: State Key Laboratory of Agricultural Microbiology
Daohong Jiang: State Key Laboratory of Agricultural Microbiology
Wenxing Xu: State Key Laboratory of Agricultural Microbiology

Nature Communications, 2017, vol. 8, issue 1, 1-12

Abstract: Abstract 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.

Date: 2017
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DOI: 10.1038/s41467-017-00237-9

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