Curtovirus
| Curtovirus | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | Floreoviria |
| Kingdom: | Shotokuvirae |
| Phylum: | Cressdnaviricota |
| Class: | Repensiviricetes |
| Order: | Geplafuvirales |
| Family: | Geminiviridae |
| Genus: | Curtovirus |
| Species | |
Curtovirus is a genus of ssDNA viruses, in the family Geminiviridae. Dicotyledonous plants serve as natural hosts. Curtoviruses are transmitted by leafhoppers. There are three species in this genus. Diseases associated with this genus include: Curly top disease.[1][2]
Taxonomy
[edit]The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:[2][3]
- Curtovirus armoraciae, Horseradish curly top virus
- Curtovirus betae, Beet curly top virus
- Curtovirus spinaciae, Spinach severe curly top virus
Structure
[edit]Viruses in Curtovirus are non-enveloped, with icosahedral geometries, and T=1 symmetry. The diameter is around 22 nm, with a length of 38 nm. Genomes are circular and non-segmented, around 3.0kb in length.[1]
| Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
|---|---|---|---|---|---|
| Curtovirus | Twinned Icosahedral | Incomplete T=1 | Non-enveloped | Circular | Monopartite |
Life cycle
[edit]Viral replication is nuclear. Entry into the host cell is achieved by penetration into the host cell. Replication follows the ssDNA rolling circle model. Dna templated transcription is the method of transcription. The virus exits the host cell by nuclear pore export, and tubule-guided viral movement. Dicotyledonous plants serve as the natural host. The virus is transmitted via a vector (beet leafhopper). Transmission routes are vector.[1]
| Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
|---|---|---|---|---|---|---|---|
| Curtovirus | Dicotyledonous plants | Phloem-limited | Viral movement; mechanical inoculation | Budding | Nucleus | Nucleus | Beet leefhopper |
References
[edit]- 1 2 3 "Viral Zone". ExPASy. Retrieved 15 June 2015.
- 1 2 "Virus Taxonomy: 2024 Release". International Committee on Taxonomy of Viruses. Retrieved 27 March 2025.
- ↑ "Species List: Geminiviridae". International Committee on Taxonomy of Viruses. Retrieved 27 March 2025.