Narnavirus: Difference between revisions
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'''''Narnavirus''''' is a genus of [[Positive-strand RNA virus|positive-strand RNA viruses]] in the family '''''Narnaviridae'''''. [[Fungus|Fungi]] serve as natural hosts. There are two species in this genus.<ref name=ICTV /><ref name=ViralZone>{{cite web|title=Viral Zone|url=http://viralzone.expasy.org/all_by_species/303.html|publisher=ExPASy|access-date=15 June 2015}}</ref> |
'''''Narnavirus''''' is a genus of [[Positive-strand RNA virus|positive-strand RNA viruses]] in the family '''''Narnaviridae'''''. [[Fungus|Fungi]] serve as natural hosts. There are two species in this genus.<ref name=ICTV /><ref name=ViralZone>{{cite web|title=Viral Zone|url=http://viralzone.expasy.org/all_by_species/303.html|publisher=ExPASy|access-date=15 June 2015}}</ref> Member viruses have been shown to be required for sexual reproduction of ''[[Rhizopus microsporus]]''.<ref>{{cite journal | year = 2020 | title = Narnaviruses: Novel players in fungal–bacterial symbioses | authors = Espino-Vázquez AN, Bermúdez-Barrientos JR, Cabrera-Rangel JF, Córdova-López G, Cardoso-Martínez F, Martínez-Vázquez A, Camarena-Pozos DA, Mondo SJ, Pawlowska TE, Abreu-Goodger C, Partida-Martínez LP. | journal = The ISME Journal | doi = 10.1038/s41396-020-0638-y}}</ref> Narnaviruses have a ''na''ked ''RNA'' genome and derive their name from this feature.<ref>{{Cite web|title=Narnaviridae - Positive Sense RNA Viruses - Positive Sense RNA Viruses (2011) - ICTV|url=https://talk.ictvonline.org/ictv-reports/ictv_9th_report/positive-sense-rna-viruses-2011/w/posrna_viruses/267/narnaviridae|access-date=2021-06-15|website=talk.ictvonline.org}}</ref> |
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== Virology == |
== Virology == |
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Revision as of 12:21, 15 June 2021
| Narnavirus | |
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| Narnaviruses have no capsid or viral envelope, RNA genome and RdRp form a naked ribonucleoprotein complex | |
Virus classification 
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| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Lenarviricota |
| Class: | Amabiliviricetes |
| Order: | Wolframvirales |
| Family: | Narnaviridae |
| Genus: | Narnavirus |
| Species | |
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Narnavirus is a genus of positive-strand RNA viruses in the family Narnaviridae. Fungi serve as natural hosts. There are two species in this genus.[1][2] Member viruses have been shown to be required for sexual reproduction of Rhizopus microsporus.[3] Narnaviruses have a naked RNA genome and derive their name from this feature.[4]
Virology
Structure
Narnaviruses have no true virion. They do not have structural proteins or a capsid.[5]
Genome
Narnaviruses have nonsegmented, linear, positive-sense, single-stranded RNA genomes. The genome has one open reading frame which encodes the RNA-dependent RNA polymerase (RdRp). The genome is associated with the RdRp in the cytoplasm of the fungi host and forms a naked ribonucleoprotein complex.[2]
Replication cycle
Viral replication is cytoplasmic. Replication follows the positive-strand RNA virus replication model. Positive-strand RNA virus transcription is the method of transcription. The virus exits the host cell by cell-to-cell movement. Fungi serve as the natural host. Transmission routes are parental and sexual.[2]
Taxonomy
The genus has the following two species:[1]
- Saccharomyces 20S RNA narnavirus
- Saccharomyces 23S RNA narnavirus
References
- ^ a b "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 16 May 2021.
- ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015.
- ^ "Narnaviruses: Novel players in fungal–bacterial symbioses". The ISME Journal. 2020. doi:10.1038/s41396-020-0638-y.
{{cite journal}}: Cite uses deprecated parameter|authors=(help) - ^ "Narnaviridae - Positive Sense RNA Viruses - Positive Sense RNA Viruses (2011) - ICTV". talk.ictvonline.org. Retrieved 15 June 2021.
- ^ Dolja, V. V.; Koonin, E. V. (2012). "Capsid-Less RNA Viruses". ELS. doi:10.1002/9780470015902.a0023269. ISBN 978-0470016176.