Okubovirus

Okubovirus
Virion of genus Okubovirus
Virus classification Edit this classification
(unranked): Virus
Realm: Duplodnaviria
Kingdom: Heunggongvirae
Phylum: Uroviricota
Class: Caudoviricetes
Family: Herelleviridae
Subfamily: Spounavirinae
Genus: Okubovirus

Okubovirus is a genus of viruses in the family Herelleviridae, in the subfamily Spounavirinae.[1] Bacteria serve as natural hosts. There are two species in this genus.[1][2][3][4]

Taxonomy

The following two species are assigned to the genus:[4]

Structure

Viruses in Okubovirus are non-enveloped, with head-tail geometries, and T=16 symmetry. The diameter is around 108 nm, with a length of 140 nm. Genomes are linear, around 145kb in length. The genome codes for 200 proteins.[1][2]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Okubovirus Head-Tail T=16 Non-enveloped Linear Monopartite

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by adsorption into the host cell. DNA-templated transcription is the method of transcription. Bacteria serve as the natural host. Transmission routes are passive diffusion.[1][2]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Okubovirus Bacteria None Injection Lysis Cytoplasm Cytoplasm Passive diffusion

Taxonomic history

  • Bacillus phage SP8 was assigned to the family Myoviridae in 1995.
  • Bacillus phage SPO1 was assigned to the genus SPO1-like phages in 1996 as type species.
  • Myoviridae were assigned to the order Caudovirales in 1998
  • SPO1-like phages were renamed SPO1-like viruses in 1999
  • Bacillus phage SP8 was merged into Bacillus phage SPO1 in 1999 (as type species) of SPO1-like viruses.
  • SPO1-like viruses were assigned to the sub-family Spounavirinae (of Caudovirales) in 2011.
  • SPO1-like viruses were renamed Spounalikevirus in 2012.
  • Spounalikevirus was renamed to Spo1virus in 2015.
  • Spo1virus was renamed to Okubovirus in 2018.

References

  1. ^ a b c d "ICTV Report Herelleviridae".
  2. ^ a b c "Viral Zone". ExPASy. Retrieved 1 July 2015.
  3. ^ Encyclopedia of Virology. p. 1681.
  4. ^ a b "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 11 May 2021.
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