Vitivirus
| Vitivirus | |
|---|---|
| Virus classification | |
| Group: | Group IV ((+)ssRNA) |
| Order: | Tymovirales |
| Family: | Betaflexiviridae |
| Genus: | Vitivirus |
| Type Species | |
Vitivirus is a genus of viruses in the order Tymovirales, in the family Betaflexiviridae.[1][2] Plants serve as natural hosts. There are currently nine species in this genus including the type species Grapevine virus A.[1][3]
Taxonomy
Group: ssRNA(+)
- Family: Betaflexiviridae
- Genus: Vitivirus
- Actinidia virus A
- Actinidia virus B
- Grapevine virus A
- Grapevine virus B
- Grapevine virus D
- Grapevine virus E
- Grapevine virus F
- Heracleum latent virus
- Mint virus 2
Structure
Viruses in Vitivirus are non-enveloped, with flexuous and filamentous geometries. The diameter is around 12 nm. Genomes are linear, around 7.6kb in length. The genome codes for 5 proteins.[3]
| Genus | Structure | Symmetry | Capsid | Genomic Arrangement | Genomic Segmentation |
|---|---|---|---|---|---|
| Vitivirus | 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. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (mechanical inoculation pseudococcid mealybugs and aphids). Transmission routes are vector and mechanical.[3]
| Genus | Host Details | Tissue Tropism | Entry Details | Release Details | Replication Site | Assembly Site | Transmission |
|---|---|---|---|---|---|---|---|
| Vitivirus | Plants | None | Viral movement; mechanical innoculation | Viral movement | Cytoplasm | Cytoplasm | Mechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids |
References
- 1 2 3 ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
- ↑ Complete genome sequence of a novel vitivirus isolated from grapevine. Al Rwahnih M, Sudarshana MR, Uyemoto JK and Rowhani A, J Virol., September 2012, volume 86, issue 17, page 9545, doi:10.1128/JVI.01444-12
- 1 2 3 "Viral Zone". ExPASy. Retrieved 15 June 2015.