Quadriviridae: Difference between revisions
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==Structure== |
==Structure== |
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[[Mycovirus|Mycoviruses]] in the family ''Quadriviridae'' have a [[Virus#Structure|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.<ref name="ICTV" /><ref name="ViralZone" /> |
[[Mycovirus|Mycoviruses]] in the family ''Quadriviridae'' have a [[Virus#Structure|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.<ref name="ICTV" /><ref name="ViralZone" /> |
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==Genome== |
==Genome== |
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[[File:ODR.Quadri.fig3.v4.png|thumb|Genome of Rosellinia necatrix quadrivirus 1 ]] |
[[File:ODR.Quadri.fig3.v4.png|thumb|Genome of Rosellinia necatrix quadrivirus 1 ]] |
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Family member [[Virus#Genome|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 to 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]].<ref name=ICTV /><ref name=ViralZone/> |
Family member [[Virus#Genome|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 to 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]].<ref name=ICTV /><ref name=ViralZone/> |
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Revision as of 12:38, 28 July 2021
| Quadrivirus | |
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| (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 
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| (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 to 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.
- ^ a b c d "ICTV Report Quadriviridae".
- ^ a b c d e "Viral Zone". ExPASy. Retrieved 13 August 2015.
- ^ "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 13 May 2021.