Mitovirus

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 including the type species Cryphonectria mitovirus 1.[1][2]

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
Type species
Cryphonectria mitovirus 1
Species

See text

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]

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

References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. "Virus Taxonomy: 2019 Release". talk.ictvonline.org. International Committee on Taxonomy of Viruses. Retrieved 25 April 2020.
  3. "Viral Zone". ExPASy. Retrieved 15 June 2015.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.