Ourmiavirus

Ourmiavirus is a genus of positive-strand RNA viruses.[1] Cucurbits, cherry, and cassava serve as natural hosts. There are currently three species in this genus including the type species Ourmia melon virus.[2] Diseases associated with this genus include: ouMV: yellowing and chlorotic spot symptoms.[2][3]

Ourmiavirus
TEM of ourmia melon virus (bar, 100 nm), (b, c) commonest particle types (two- and three-disc), and genome
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Lenarviricota
Class: Miaviricetes
Order: Ourlivirales
Family: Botourmiaviridae
Genus: Ourmiavirus
Type species
Ourmia melon virus
Species
  • Cassava virus C
  • Epirus cherry virus
  • Ourmia melon virus

Structure
Ourmiavirus illustration shows number of double disks for different length. Each row of five triangles represents a double disk.

Viruses in the genus Ourmiavirus are non-enveloped, with icosahedral and Bacilliform geometries, and T=1 symmetry. The diameter is around 18 nm, with a length of 30 nm.[2][3]

Genome

Genomes are linear and segmented, around 2.8kb in length.[2][3]

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement. Cucurbits, cherry, and cassava serve as the natural host.[2][3]

Taxonomy

The genus has three species:

  • Ourmiavirus
    • Cassava virus C
    • Epirus cherry virus
    • Ourmia melon virus

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. "Viral Zone". ExPASy. Retrieved 15 June 2015.
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