Bullavirinae
Bullavirinae is a subfamily of viruses in the family Microviridae. Enterobacteria serve as natural hosts. There are 14 species in this subfamily, organized into three genera.[1]
| Bullavirinae | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | Monodnaviria |
| Kingdom: | Sangervirae |
| Phylum: | Phixviricota |
| Class: | Malgrandaviricetes |
| Order: | Petitvirales |
| Family: | Microviridae |
| Subfamily: | Bullavirinae |
| Genera | |
| |
Taxonomy
The following genera and species are recognized:[1]
- Genus: Alphatrevirus; species:
- Escherichia virus alpha3
- Escherichia virus ID21
- Escherichia virus ID32
- Escherichia virus ID62
- Escherichia virus NC28
- Escherichia virus NC29
- Escherichia virus NC35
- Escherichia virus phiK
- Escherichia virus St1
- Escherichia virus WA45
- Genus: Gequatrovirus; species:
- Escherichia virus G4
- Escherichia virus ID52
- Escherichia virus Talmos
- Genus: Sinsheimervirus; species:
- Escherichia virus phiX174
Structure
Viruses in Bullavirinae are non-enveloped, with icosahedral and round geometries, and T=1 symmetry. The diameter is around 30 nm. Genomes are circular, around 6.1kb in length.[2]
Life cycle
Viral replication is cytoplasmic. Entry into the host cell is achieved by pilus-mediated adsorption into the host cell. Replication follows the ssDNA rolling circle model. DNA-templated transcription is the method of transcription. The virus exits the host cell by bacteria lysis.
Enterobacteria serve as the natural host. Transmission routes are passive diffusion.[2]
References
- "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 10 May 2021.
- "Viral Zone". ExPASy. Retrieved 15 June 2015.