Alphaflexiviridae
| Alphaflexiviridae | |
|---|---|
| Virus classification | |
| Group: | Group IV ((+)ssRNA) |
| Order: | Tymovirales |
| Family: | Alphaflexiviridae |
| Genera | |
Alphaflexiviridae is a family of viruses in the order Tymovirales. Plants and fungi serve as natural hosts. There are currently 51 species in this family, divided among 6 genera. Diseases associated with this family include: mosaic and ringspot symptoms.[1][2]
Taxonomy
Group: ssRNA(+)
- Family: Alphaflexiviridae
- Genus: Allexivirus
- Garlic mite-borne filamentous virus
- Garlic virus A
- Garlic virus B
- Garlic virus C
- Garlic virus D
- Garlic virus E
- Garlic virus X
- Shallot virus X
- Genus: Botrexvirus
- Genus: Lolavirus
- Genus: Mandarivirus
- Citrus yellow vein clearing virus
- Indian citrus ringspot virus
- Genus: Potexvirus
- Allium virus X
- Alstroemeria virus X
- Alternanthera mosaic virus
- Asparagus virus 3
- Bamboo mosaic virus
- Cactus virus X
- Cassava common mosaic virus
- Cassava virus X
- Clover yellow mosaic virus
- Commelina virus X
- Cymbidium mosaic virus
- Daphne virus X
- Foxtail mosaic virus
- Hosta virus X
- Hydrangea ringspot virus
- Lagenaria mild mosaic virus
- Lettuce virus X
- Lily virus X
- Malva mosaic virus
- Mint virus X
- Narcissus mosaic virus
- Nerine virus X
- Opuntia virus X
- Papaya mosaic virus
- Pepino mosaic virus
- Phaius virus X
- Plantago asiatica mosaic virus
- Plantago severe mottle virus
- Plantain virus X
- Potato aucuba mosaic virus
- Potato virus X
- Schlumbergera virus X
- Strawberry mild yellow edge virus
- Tamus red mosaic virus
- Tulip virus X
- White clover mosaic virus
- Zygocactus virus X
- Genus: Unassigned
- Blackberry virus E
Structure
Viruses in Alphaflexiviridae are non-enveloped, with flexuous and Filamentous geometries. The diameter is around 12-13 nm. Genomes are linear, around 5.4-9kb in length. The genome codes for 1 to 6 proteins.[1]
| Genus | Structure | Symmetry | Capsid | Genomic Arrangement | Genomic Segmentation |
|---|---|---|---|---|---|
| Allexivirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Potexvirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Botrexvirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Sclerodarnavirus | Capsid-less | Non-Enveloped | Linear | Monopartite | |
| Lolavirus | Filamentous | Non-Enveloped | Linear | Monopartite | |
| Mandarivirus | Filamentous | 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 tripartite non-tubule guided viral movement. Plants and fungi 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 |
|---|---|---|---|---|---|---|---|
| Allexivirus | Plants: Shallot; plants: onion; plants: garlic | None | Viral movement; mechanical innoculation | Viral movement | Cytoplasm | Cytoplasm | Mites |
| Potexvirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Insects |
| Botrexvirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Unknown |
| Sclerodarnavirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Unknown |
| Lolavirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Unknown |
| Mandarivirus | Plants | None | Viral movement; mechanical inoculation | Viral movement | Cytoplasm | Cytoplasm | Unknown |
References
- 1 2 3 "Viral Zone". ExPASy. Retrieved 12 June 2015.
- 1 2 ICTV. "Virus Taxonomy: 2014 Release". Retrieved 12 June 2015.