Botourmiaviridae

Botourmiaviridae is a family of positive-strand RNA viruses which infect plants and fungi.[1] The family includes four genera: Ourmiavirus, Botoulivirus, Magoulivirus and Scleroulivirus. Members of genus Ourmiavirus infect plants and the other genera infect fungi. The member viruses have genomes which range from 2900 to 4800 nucleotides.[2]

Botourmiaviridae
Botourmiavirus genomes (three members only encode RdRp)
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Lenarviricota
Class: Miaviricetes
Order: Ourlivirales
Family: Botourmiaviridae

Structure

Ourmiaviruses are the only members of the family that have a viral structure. The other members are naked and have no viral envelope or capsid. Ourmiaviruses are plant viruses that have a bacilliform virion composed of a single capsid protein. The virions have a series of discrete lengths from 30 to 62 nm.[2]

Genome

Members of the family Botourmiaviridae have positive-sense, single-stranded RNA genomes. The genome of the genus Ourmiavirus has three segments that encode the capside protein (CP), movement protein (MP), and RNA-dependent RNA polymerase (RdRp). The length of the genome is around 4800 nucleotides. The genomes of the other three genera of the family are nonsegmented and have lengths which range from 2000 to 3200 nucleotides. The genomes of these fungal viruses only encode an RNA-dependent RNA polymerase and have no structural proteins.[2]

Taxonomy

The family has four genera:[3]

  • Botourmiaviridae

References
  1. Ayllón, MA; Turina, M; Xie, J; Nerva, L; Marzano, SL; Donaire, L; Jiang, D; ICTV Report Consortium (May 2020). "ICTV Virus Taxonomy Profile: Botourmiaviridae". The Journal of General Virology. 101 (5): 454–455. doi:10.1099/jgv.0.001409. PMID 32375992.
  2. "ICTV Report Botourmiaviridae".
  3. "Virus Taxonomy: 2019 Release". talk.ictvonline.org. International Committee on Taxonomy of Viruses. Retrieved 25 April 2020.
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