Plasmaviridae
Plasmavirus | |
---|---|
EM of a plasmavirus | |
Virus classification | |
(unranked): | Virus |
Family: | Plasmaviridae |
Genus: | Plasmavirus |
Species | |
| |
Synonyms | |
Plasmavirus
Plasmavirus L2
|
Plasmaviridae is a family of bacteria-infecting
This family is poorly studied and little is known about the diversity and biology of these viruses.
Taxonomy
The family has one genus, Plasmavirus, which has one recognized member: Acholeplasma virus L2.
There are five tentative members of Plasmavirus:
- Mycoplasmatales virus-laidlawii 1 (L1)
- Mycoplasmatales virus-laidlawii 2 (L2)
- Mycoplasmatales virus-laidlawii 3 (L3)
- Mycoplasmatales virus-laidlawii 51 (L51)
- Mycoplasmatales virus-laidlawii O1 (O1)
Genome
The genome is condensed, nonsegmented and consists of a single molecule of circular, supercoiled double-stranded DNA, 12 kilobase pairs in length. The genome has a rather high G-C content of ~32%.[4] The genome has 14 open reading frames,[2] and encodes at least 15 proteins, of which at least four are structural proteins embedded in the membrane.[citation needed]
Structure
Virions are quasi-spherical, slightly pleomorphic, enveloped and about 80 nm (range 50–125 nm) in diameter.[1]
Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
---|---|---|---|---|---|
Plasmavirus | Spherical to pleomorphic | Undefined | Enveloped | Circular | Monopartite |
Life cycle
Viral replication is cytoplasmic. DNA-templated transcription is the method of transcription. The virus exits the host cell by budding. Acholeplasma species serve as the natural host.[2]
Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
---|---|---|---|---|---|---|---|
Plasmavirus | Bacteria: Acholeplasma sp. | None | Fusion | Membrane budding | Cytoplasm | Unknown | Unknown |
Infection
A productive infectious cycle begins before a
References
- ^ PMID 29611799.
- ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015.
- ^ "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 24 May 2021.
- ^ Büchen-Osmond, C. (Ed) (2003). 00.053. Plasmaviridae. In: ICTVdB—The Universal Virus Database, version 3. Büchen-Osmond, C. (Ed), ICTVdB Management, The Earth Institute and Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA.