Okubovirus

Okubovirus
Virion of genus Okubovirus
Virus 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]

• Bacillus virus Camphawk
• Bacillus virus SPO1

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

External links

• Viralzone: Spounalikevirus
• ICTV Report: Herelleviridae