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Phylogenetic classification of a group of self-replicating RNAs that are common in co-infections with poleroviruses

Tipo de material: TextoTextoSeries ; Virus Research, 276, p.197831, 2020Trabajos contenidos:
  • Campbell, A. J
  • Erickson, A
  • Pellerin, E
  • Salem, N
  • Mo, X
  • Falk, B. W
  • Ferriol, I
Tema(s): Recursos en línea: Resumen: Tombusvirus-like associated RNAs (tlaRNAs)are positive-sense single-stranded RNAs found in plants co-infected with viruses of the genus Polerovirus. TlaRNAs depend upon capsid proteins supplied in trans by the co-infecting polerovirus for vector transmission and intra-host systemic movement. Here, the full-length genomes of five tlaRNAs were determined using a combination of RT-PCR and next-generation sequencing, and evidence is provided for an additional tlaRNA associated with potato leafroll virus. Phylogenetic analyses based on conserved domains of the RdRp placed tlaRNAs as a monophyletic clade clustering with members of the family Tombusviridae and comprising three different subclades. Full-length clones of tlaRNAs from two of three subclades were confirmed to replicate autonomously, and each produces a subgenomic RNA during infection.
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Tombusvirus-like associated RNAs (tlaRNAs)are positive-sense single-stranded RNAs found in plants co-infected with viruses of the genus Polerovirus. TlaRNAs depend upon capsid proteins supplied in trans by the co-infecting polerovirus for vector transmission and intra-host systemic movement. Here, the full-length genomes of five tlaRNAs were determined using a combination of RT-PCR and next-generation sequencing, and evidence is provided for an additional tlaRNA associated with potato leafroll virus. Phylogenetic analyses based on conserved domains of the RdRp placed tlaRNAs as a monophyletic clade clustering with members of the family Tombusviridae and comprising three different subclades. Full-length clones of tlaRNAs from two of three subclades were confirmed to replicate autonomously, and each produces a subgenomic RNA during infection.

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