Quadriviridae: Difference between revisions
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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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[[File:Quadriviridae virion.jpg|thumb|Schematic diagram of ''Quadriviridae'' virions. The four genomic segments may be separately encapsulated.<ref name=ViralZone/>]] |
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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 |
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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==Life cycle== |
==Life cycle== |
Revision as of 13:39, 6 April 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 | |
(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 currently only one species in this family: the type species 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:
- 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.