Narnavirus is a genus of positive-strand RNA viruses in the family Narnaviridae. Fungus serve as natural hosts. There are two species in this genus.
Virology
Structure
Narnaviruses have no true virion. They do not have structural proteins or a
capsid.
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.
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.
Taxonomy
The genus has the following species, listed by scientific name and followed by the exemplar virus of the species:
-
Narnavirus saccharomaior, Saccharomyces 23S RNA narnavirus
-
Narnavirus saccharominor, Saccharomyces 20S RNA narnavirus
External links
