| Tymoviridae | |
|---|---|
| Virus classification | |
| Group: | Group IV ((+)ssRNA) |
| Order: | Tymovirales |
| Family: | Tymoviridae |
| Genera | |
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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.
Contents |
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.
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:
Unclassified viruses