Narnavirus
| Narnavirus | |
|---|---|
| |
| |
| Narnaviruses have nocapsidorviral envelope,RNAgenome andRdRpform a nakedribonucleoprotein complex | |
Virus classification
| |
| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Lenarviricota |
| Class: | Amabiliviricetes |
| Order: | Wolframvirales |
| Family: | Narnaviridae |
| Genus: | Narnavirus |
| Species | |
Narnavirusis a genus ofpositive-strand RNA virusesin the familyNarnaviridae.Fungiserve as natural hosts. There are two species in this genus.[1][2]Member viruses have been shown to be required for sexual reproduction ofRhizopus microsporus.[3]Narnaviruses have anakedRNAgenome without a virion and derive their name from this feature.[4]
Virology
[edit]Structure
[edit]Narnaviruses have no true virion. They do not have structural proteins or acapsid.[5]
Genome
[edit]Narnaviruses have nonsegmented, linear,positive-sense,single-stranded RNA genomes. The genome has oneopen reading framewhich encodes theRNA-dependent RNA polymerase(RdRp). The genome is associated with the RdRp in thecytoplasmof the fungi host and forms a nakedribonucleoproteincomplex.[2]
Replication cycle
[edit]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
[edit]The genus has the following two species:[1]
References
[edit]- ^ab"Virus Taxonomy: 2020 Release".International Committee on Taxonomy of Viruses (ICTV). March 2021.Retrieved16 May2021.
- ^abc"Viral Zone".ExPASy.Retrieved15 June2015.
- ^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. (2020)."Narnaviruses: Novel players in fungal–bacterial symbioses".The ISME Journal.14(7): 1743–1754.doi:10.1038/s41396-020-0638-y.PMC7305303.PMID32269378.
- ^"Narnaviridae - Positive Sense RNA Viruses - Positive Sense RNA Viruses (2011) - ICTV".talk.ictvonline.org.Retrieved15 June2021.[dead link]
- ^Dolja, V. V.; Koonin, E. V. (2012). "Capsid-Less RNA Viruses".ELS.doi:10.1002/9780470015902.a0023269.ISBN978-0-470-01617-6.