Biology:Topocuvirus

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Short description: Genus of viruses


Topocuvirus
Virus classification e
(unranked): Virus
Realm: Monodnaviria
Kingdom: Shotokuvirae
Phylum: Cressdnaviricota
Class: Repensiviricetes
Order: Geplafuvirales
Family: Geminiviridae
Genus: Topocuvirus

Topocuvirus is a genus of viruses, in the family Geminiviridae. Dicotyledonous plants serve as natural hosts. There is only one species in this genus: Tomato pseudo-curly top virus. Diseases associated with this genus include: vein swelling, curling of the leaves and leaf distortion.[1][2]

Structure

Viruses in Topocuvirus 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 2.86kb in length.[1]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Topocuvirus Twinned Icosahedral Incomplete T=1 Non-enveloped Circular Monopartite

Life cycle

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 (treehopper). Transmission routes are vector.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Topocuvirus Dicotyledonous plants None Cell receptor endocytosis Budding Nucleus Nucleus Leafhopper

References

  1. 1.0 1.1 1.2 "Viral Zone". ExPASy. http://viralzone.expasy.org/all_by_species/116.html. Retrieved 15 June 2015. 
  2. "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. https://ictv.global/taxonomy. 

External links

Wikidata ☰ Q18819213 entry