Alphatorquevirus
| Alphatorquevirus | |
|---|---|
| Virus classification | |
| Group: | Group II (ssDNA) |
| Family: | Anelloviridae |
| Genus: | Alphatorquevirus |
| Species | |
Alphatorquevirus is a recently discovered genus in the new family of Anelloviridae, in group II in the Baltimore classification. It encompasses many type species of the virus formerly known as TTV, Transfusion Transmitted Virus or Torque Teno Virus, SENV, SANBAN, and others.[1]
The type species is Torque Teno Virus 1–29.
Virology
The viron is non-enveloped and isocahedral with a diameter of ~30-32 nm.
The single stranded DNA genome is ~3.8 kilobases in length.
There are 2 open reading frames: ORF1—770 codons in length—and ORF2—202 codons in length.
Taxonomy
At least 30 genotypes have been described in the literature. Isolates are numbered sequentially: Torque teno virus 1,2,3 ...
The isolates have been divided into six groups based on their genetic relatedness:
Group 1: 1–4
Group 2: 7–9
Group 3: 10–18
Group 4: 19, 20
Group 5: 5, 6
Group 6: 21, 22
These groups may eventually be elevated to species level but this is not the case at present.
Host range
By definition Alphatorquevirus infect humans.
References
- ↑ Biagini P (2009). "Classification of TTV and related viruses (anelloviruses)". Curr. Top. Microbiol. Immunol. 331: 21–33. doi:10.1007/978-3-540-70972-5_2. PMID 19230555.
External links
- ICTV Virus Taxonomy 2009
- UniProt Taxonomy
- Anellovirus at the US National Library of Medicine Medical Subject Headings (MeSH)
- ICTVdb
- ViralZone: Alphatorquevirus