Tymoviridae
| Tymoviridae | |
|---|---|
| Virus classification | |
| Group: |
Group IV ((+)ssRNA)
|
| Order: | |
| Family: |
Tymoviridae
|
| Genera | |
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Tymoviridae is a family of single-stranded positive sense RNA viruses in the order Tymovirales. Plants serve as natural hosts. There are currently 37 species in this family, divided among 3 genera.[1][2]
Contents
Taxonomy
The largest of three genera is Tymovirus with 27 species, whereas the other genera, Marafivirus and Maculavirus have 7 and 1 species respectively.[2]
Group: ssRNA(+)
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Family: Tymoviridae
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Genus: Unassigned
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Genus: Maculavirus
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Genus: Tymovirus
- Anagyris vein yellowing virus
- Andean potato latent virus
- Andean potato mild mosaic virus
- Belladonna mottle virus
- Cacao yellow mosaic virus
- Calopogonium yellow vein virus
- Chayote mosaic virus
- Chiltepin yellow mosaic virus
- Clitoria yellow vein virus
- Desmodium yellow mottle virus
- Dulcamara mottle virus
- Eggplant mosaic virus
- Erysimum latent virus
- Kennedya yellow mosaic virus
- Melon rugose mosaic virus
- Nemesia ring necrosis virus
- Okra mosaic virus
- Ononis yellow mosaic virus
- Passion fruit yellow mosaic virus
- Peanut yellow mosaic virus
- Petunia vein banding virus
- Physalis mottle virus
- Plantago mottle virus
- Scrophularia mottle virus
- Turnip yellow mosaic virus
- Voandzeia necrotic mosaic virus
- Wild cucumber mosaic virus
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Proposed Viruses
Virology
The virions are non-enveloped and isometric with a diameter of around 30 nm, with an icosahedral structure and a triangulation number T=3.[1]
The linear genome is between of 6-7.5 kilobases in length[1] 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.
| Genus | Structure | Symmetry | Capsid | Genomic Arrangement | Genomic Segmentation |
|---|---|---|---|---|---|
| Maculavirus | Icosahedral | T=3 | Non-Enveloped | Linear | Monopartite |
| Marafivirus | Icosahedral | T=3 | Non-Enveloped | Linear | Monopartite |
| Tymovirus | Icosahedral | T=3 | Non-Enveloped | Linear | Monopartite |
Life Cycle
Viral replication is cytoplasmic, and is lysogenic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. Translation takes place by leaky scanning. The virus exits the host cell by monopartite non-tubule guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.[1]
| Genus | Host Details | Tissue Tropism | Entry Details | Release Details | Replication Site | Assembly Site | Transmission |
|---|---|---|---|---|---|---|---|
| Maculavirus | Plants | None | Viral movement; mechanical innoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids |
| Marafivirus | Plants | None | Viral movement; mechanical innoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids |
| Tymovirus | Plants | None | Viral movement; mechanical innoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical: beetles; sap |
References
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<references />, or <references group="..." />Further reading
- Martelli GP. Sabanadzovic S. Abou-Ghanem Sabanadzovic N. Edwards MC. Dreher T. (2002). The family Tymoviridae. Archives of Virology. 147(9):1837-46
- University of Leicester Microbiology
External links
- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 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.
