Tymoviridae

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Tymoviridae
Virus classification
Group: Group IV ((+)ssRNA)
Order: Tymovirales
Family: Tymoviridae
Genera
  • Maculavirus
  • Marafivirus
  • Tymovirus

Tymoviridae are monopartite single-stranded positive sense RNA plant viruses, belonging to group IV of the Baltimore classification of viruses. The Tymoviridae are a relatively new family, only approved in 2002.

Virology

The virons are non-enveloped and isometric with a diameter of around 30 nm, with an icosahedral structure and a triangulation number (T) = 3.

The linear genome is between of 6-7.5 kilobases in length and encodes one large open reading frame. It is capped at the 5’ terminus. The 3’ terminus may have a tRNA-like structure or a polyA tract, depending upon the species. The genome is relatively cytosine rich.

Taxonomy

The largest of three genera is Tymovirus with 25 species, whereas the other genera, Marafivirus and Maculavirus have 5 and 1 species respectively.

The Tymoviridae family includes the following genera:

  • Genus Maculavirus
    • Bombyx mori Macula-like virus
    • Grapevine fleck virus (type species)
  • Genus Marafivirus
    • Maize rayado fino virus (type species)

Unclassified viruses

  • Culex tymovirus[1]
  • Fig fleck-associated virus
  • Olive latent virus 3

References

  1. ↑ Wang L, Lv X, Zhai Y, Fu S, Wang D, Rayner S, Tang Q, Liang G (2012) Genomic characterization of a novel virus of the family tymoviridae isolated from mosquitoes. PLoS One 7(7):e39845.

External links

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