Mitovirus

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

See text

Mitoviruses are a family of positive-strand RNA viruses that constitute the family Mitoviridae. Fungi serve as natural hosts. There are four genera in the family. [1] [2]

Contents

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. [1]

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

The family contains four genera: [2]

References

  1. 1 2 3 4 "Mitoviridae". ViralZone. Swiss Institute of Bioinformatics. Retrieved 4 May 2025.
  2. 1 2 "Virus Taxonomy: 2024 Release". International Committee on Taxonomy of Viruses. Retrieved 4 May 2025.