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{{Short description|Genus of viruses}}
{{Virusbox
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| taxon = Gammatorquevirus
| taxon = Gammatorquevirus
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| subdivision_ranks =
| type_species = ''[[Torque teno midi virus 1]]''
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| subdivision_ranks = Species
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| subdivision_ref = <ref>{{cite web |title=Virus Taxonomy: 2018b Release |url=https://talk.ictvonline.org/taxonomy/ |website=International Committee on Taxonomy of Viruses (ICTV) |accessdate=4 March 2020 |language=en |format=html |date=March 2019}}</ref>
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| synonyms =
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'''''Gammatorquevirus''''' is a [[genus]] of [[virus]]es in the family ''[[Anelloviridae]]'', in group [[DNA virus#Group II: ssDNA viruses|II in the Baltimore classification]]. It contains 15 species. The fifteen species are all named "torque teno midi virus" (TTMDV), number 1–15.

==Taxonomy==
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The genus contains the following species:<ref>{{cite web |title=Virus Taxonomy: 2020 Release |url=https://ictv.global/taxonomy |publisher=International Committee on Taxonomy of Viruses (ICTV) |date=March 2021 |access-date=23 May 2021}}</ref>

*''[[Torque teno midi virus 1]]''
*''[[Torque teno midi virus 1]]''
*''[[Torque teno midi virus 2]]''
*''[[Torque teno midi virus 2]]''
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*''[[Torque teno midi virus 14]]''
*''[[Torque teno midi virus 14]]''
*''[[Torque teno midi virus 15]]''
*''[[Torque teno midi virus 15]]''
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| synonyms =
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| synonyms_ref =
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}}

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'''''Gammatorquevirus''''' is a [[genus]] of [[virus]]es in the family ''[[Anelloviridae]]'', in group [[DNA virus#Group II: ssDNA viruses|II in the Baltimore classification]]. It contains 15 species, including the type species ''[[Torque teno midi virus 1]]''. The fifteen species all share the same name, numbered 1-15, and for that reason "torque teno midi viruses" (TTMDV) is used interchangeably with ''Gammatorquevirus''.


==Discovery==
==Discovery==
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==Genome and capsid==
==Genome and capsid==
Like other members of its family, TTMDV's [[genome]] is a circular single-stranded piece of [[DNA]] of a negative polarity. The genome is approximately 3.2&nbsp;kb in length, which is slightly smaller than that of [[Transfusion transmitted virus|TTV]] and slightly larger than that of TTMV. it is a non-[[enveloped virus]] with a [[capsid]] of about 40&nbsp;nm in diameter. The capsid possesses T=1 icosahedral symmetry.
Like other members of its family, TTMDV's [[genome]] is a circular single-stranded piece of [[DNA]] of a negative polarity. The genome is approximately 3.2&nbsp;kb in length, which is slightly smaller than that of [[Transfusion transmitted virus|TTV]] and slightly larger than that of [[Betatorquevirus|TTMV]].<ref>{{cite book |last1=Okamoto |first1=H |title=TT Viruses |chapter=History of Discoveries and Pathogenicity of TT Viruses |year=2009 |journal=Curr Top Microbiol Immunol |series=Current Topics in Microbiology and Immunology |volume=331 |pages=1–20 |doi=10.1007/978-3-540-70972-5_1 |pmid=19230554|isbn=978-3-540-70971-8 }}</ref> It is a non-[[enveloped virus]] with a [[capsid]] about 40&nbsp;nm in diameter. The capsid possesses T=1 icosahedral symmetry.

The genomes of TTMDV, [[Betatorquevirus|TTMV]], and TTV are similar. The main differences are illustrated by Okamato{{who|date=March 2020}} 2009.<ref>"History of Discoveries and Pathogenicity of TT Viruses." Current Topics in Microbiology and Immunology 331 (2009): 1-20. Springer Link. Web. 26 April 2015.</ref>


==Clinical==
==Clinical==
The pathogenic effects of TTMDV in humans is not known. However, it has been isolated from diarrhea cases.<ref>{{cite journal|last1=Finkbeiner." Ed. Edward C. Holmes. PLoS Pathogens 4.2 (2008): E1000011.|first1=Stacy R.|last2=Allred|first2=Adam F.|last3=Tarr|first3=Phillip I.|display-authors=etal|editor-last=Holmes|editor-first=Edward C.|title=Metagenomic Analysis of Human Diarrhea: Viral Detection and Discovery|journal=PLOS Pathogens|date=2008|volume=4|issue=2|page=e1000011|doi=10.1371/journal.ppat.1000011|pmid=18398449|pmc=2290972}}</ref>
The pathogenic effects of TTMDV in humans is not known. However, it has been isolated from diarrhea cases.<ref>{{cite journal|last1=Finkbeiner." Ed. Edward C. Holmes. PLoS Pathogens 4.2 (2008): E1000011.|first1=Stacy R.|last2=Allred|first2=Adam F.|last3=Tarr|first3=Phillip I.|display-authors=etal|editor-last=Holmes|editor-first=Edward C.|title=Metagenomic Analysis of Human Diarrhea: Viral Detection and Discovery|journal=PLOS Pathogens|date=2008|volume=4|issue=2|page=e1000011|doi=10.1371/journal.ppat.1000011|pmid=18398449|pmc=2290972 |doi-access=free }}</ref>


==References==
==References==
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==External links==
==External links==
* ICTV Virus Taxonomy 2009 [http://www.ictvonline.org]
* ICTV Virus Taxonomy 2009 [http://www.ictvonline.org] {{Webarchive|url=https://web.archive.org/web/20170203052212/http://www.ictvonline.org/ |date=2017-02-03 }}
* UniProt Taxonomy [https://www.uniprot.org/taxonomy/675063]
* UniProt Taxonomy [https://www.uniprot.org/taxonomy/675063]
* {{MeshName|Anellovirus}}
* {{MeshName|Anellovirus}}

Latest revision as of 03:07, 24 November 2023

Gammatorquevirus
Virus classification Edit this classification
(unranked): Virus
Family: Anelloviridae
Genus: Gammatorquevirus

Gammatorquevirus is a genus of viruses in the family Anelloviridae, in group II in the Baltimore classification. It contains 15 species. The fifteen species are all named "torque teno midi virus" (TTMDV), number 1–15.

Taxonomy[edit]

The genus contains the following species:[1]

Discovery[edit]

TTMDV, which stands for transfusion transmitted midi virus or torque teno midi virus was first isolated in 2005 from patients with an acute viral infection syndrome.[2]

Because of the circular nature of its DNA genome, TTMDV (which was provisionally named small anellovirus 1) was classified as an anellovirus. Genomic analysis confirmed this classification.[3]

Like other anelloviruses, TTMDV is quite common, even in healthy individuals. It has been found in various bodily fluids, including saliva and nasopharyngeal aspirates.

Genome and capsid[edit]

Like other members of its family, TTMDV's genome is a circular single-stranded piece of DNA of a negative polarity. The genome is approximately 3.2 kb in length, which is slightly smaller than that of TTV and slightly larger than that of TTMV.[4] It is a non-enveloped virus with a capsid about 40 nm in diameter. The capsid possesses T=1 icosahedral symmetry.

Clinical[edit]

The pathogenic effects of TTMDV in humans is not known. However, it has been isolated from diarrhea cases.[5]

References[edit]

  1. ^ "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 23 May 2021.
  2. ^ Jones, M.S.; Kapoor, A.; Lukashov, V.V.; et al. (2005). "New DNA viruses identified in patients with acute viral infection syndrome". Journal of Virology. 79 (13): 8320–8326. doi:10.1128/JVI.79.13.8230-8236.2005. PMC 1143717. PMID 15956568.
  3. ^ Andreoli, E.; Maggi, F.; Pistello, M.; et al. (2006). "Small anellovirus in hepatitis C patients and healthy controls". Emerging Infectious Diseases. 12 (7): 1175–1176. doi:10.3201/eid1207.060234. PMC 3291067. PMID 16848049.
  4. ^ Okamoto, H (2009). "History of Discoveries and Pathogenicity of TT Viruses". TT Viruses. Current Topics in Microbiology and Immunology. Vol. 331. pp. 1–20. doi:10.1007/978-3-540-70972-5_1. ISBN 978-3-540-70971-8. PMID 19230554. {{cite book}}: |journal= ignored (help)
  5. ^ Finkbeiner." Ed. Edward C. Holmes. PLoS Pathogens 4.2 (2008): E1000011., Stacy R.; Allred, Adam F.; Tarr, Phillip I.; et al. (2008). Holmes, Edward C. (ed.). "Metagenomic Analysis of Human Diarrhea: Viral Detection and Discovery". PLOS Pathogens. 4 (2): e1000011. doi:10.1371/journal.ppat.1000011. PMC 2290972. PMID 18398449.{{cite journal}}: CS1 maint: numeric names: authors list (link)

External links[edit]

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