Mitovirus

Mitovirus
Mitoviruses have no capsid or viral envelope, RNA genome and RdRp form a naked ribonucleoprotein complex
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Lenarviricota
Class: Howeltoviricetes
Order: Cryppavirales
Family: Mitoviridae
Genus: Mitovirus
Species

See text

Mitovirus is a genus of positive-strand RNA viruses, in the family Mitoviridae. Fungi serve as natural hosts. There are five species in the genus.[1][2]

Structure

Mitoviruses have no true virion. They do not have structural proteins or a capsid.[1]

Genome

Mitoviruses 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.[3]

Life 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.[1]

Taxonomy

There are five species in the genus:[2]

  • Cryphonectria mitovirus 1
  • Ophiostoma mitovirus 4
  • Ophiostoma mitovirus 5
  • Ophiostoma mitovirus 6
  • Ophiostoma mitovirus 3a

References

  1. 1 2 3 "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. 1 2 "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 16 May 2021.
  3. ↑ "Viral Zone". ExPASy. Retrieved 15 June 2015.
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