Biology:Quadriviridae
| Quadrivirus | |
|---|---|
| |
| (Left) Electron micrographs of the Rosellinia necatrix quadrivirus 1, bar = 50 nm. (Right) Three-dimensional cryo-electron microscopy reconstruction of RnQV1 virions at 8Å resolution. | |
Virus classification 
| |
| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Duplornaviricota |
| Class: | Chrymotiviricetes |
| Order: | Ghabrivirales |
| Family: | Quadriviridae |
| Genus: | Quadrivirus |
Quadriviridae is a family of double-stranded RNA viruses with a single genus Quadrivirus.[1] The fungi Rosellinia necatrix serves as a natural host. The name of the group derives from the quadripartite genome of its members where in Latin quad means four. There is only one species in this family: Rosellinia necatrix quadrivirus 1.[2][3]
Structure
Mycoviruses in the family Quadriviridae have a non-enveloped isometric capsid which consists of 60 copies of heterodimers of the structural proteins P2 and P4. The diameter of the capsid is around 48 nm.[2][3]
Genome
Family member genomes are composed of double-stranded RNA. They are divided in to four segments which each code for a protein. The length of the different segments are between 3.5 and 5.0 kbp. The total genome is around 16.8 kbp. Inside the capsid with the genome there is also the RNA-dependent RNA polymerase.[2][3]
Life cycle
Quadriviruses are transmitted internally. They are propagated during cell division and hyphal anastomosis. Viral replication occurs in the cytoplasm. It follows the double-stranded RNA virus replication model. Double-stranded RNA virus transcription is the method of transcription. The fungi Rosellinia necatrix serves as a natural host.[2][3]
Taxonomy
The family Quadrivirdae has one genus Quadrivirus which contains the species:[4]
- Rosellinia necatrix quadrivirus 1
References
- ↑ Chiba, S; Castón, JR; Ghabrial, SA; Suzuki, N; Ictv Report, Consortium (November 2018). "ICTV Virus Taxonomy Profile: Quadriviridae.". The Journal of General Virology 99 (11): 1480–1481. doi:10.1099/jgv.0.001152. PMID 30265238.
- ↑ 2.0 2.1 2.2 2.3 "ICTV Report Quadriviridae". http://www.ictv.global/report/quadriviridae.
- ↑ 3.0 3.1 3.2 3.3 3.4 "Viral Zone". ExPASy. http://viralzone.expasy.org/all_by_species/4957.html.
- ↑ "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. https://ictv.global/taxonomy.
External links
Wikidata ☰ Q18811737 entry
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