Okubovirus

Okubovirus is a genus of viruses in the order Caudovirales, in the family Herelleviridae, in the subfamily Spounavirinae.[1] Bacteria serve as natural hosts. There is currently only one species in this genus: the type species Bacillus phage SPO1.[1][2][3]

Okubovirus
Virus classification
(unranked): Virus
Realm: Duplodnaviria
Kingdom: Heunggongvirae
Phylum: Uroviricota
Class: Caudoviricetes
Order: Caudovirales
Family: Herelleviridae
Subfamily: Spounavirinae
Genus: Okubovirus
Type species
Bacillus virus SPO1

Taxonomy

Group: dsDNA

[1]

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]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
OkubovirusHead-TailT=16Non-envelopedLinearMonopartite

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]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
OkubovirusBacteriaNoneInjectionLysisCytoplasmCytoplasmPassive 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. "ICTV Report Herelleviridae".
  2. "Viral Zone". ExPASy. Retrieved 1 July 2015.
  3. Encyclopedia of Virology. p. 1681.

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