Teschovirus

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Teschovirus
Systematics
Classification : Viruses
Area : Riboviria
Empire : Orthornavirae
Phylum : Pisuviricota
Class : Pisoniviricetes
Order : Picornavirales
Family : Picornaviridae
Genre : Teschovirus
Taxonomic characteristics
Genome : (+) ssRNA linear
Baltimore : Group 4
Symmetry : icosahedral
Cover : no
Scientific name
Teschovirus
Left

According to the ICTV status of November 2018, the genus Teschovirus consists of a single species Teschovirus A , in which the previous 11 species are grouped together as subtypes. They are from non-enveloped viruses from the family Picornaviridae , which have been isolated from pigs . The generic name comes from the name of the disease caused, the Teschen disease in domestic and wild boar , which can lead to encephalomyelitis with paralysis; it is therefore also known as “infectious pig paralysis”. The symptoms and course are very similar to poliomyelitis in humans.

properties

Originally, the teschoviruses were classified as members of the genus enterovirus and designated porcine enterovirus 1-13 ; However, due to their instability with regard to low pH values and sequence comparisons, they have also been grouped together in their own genus. The virus particles (virions) of the porcine teschoviruses are about 27 to 30 nm in diameter and go through a maturation cycle outside the host cell. The viruses of the genus teschovirus differ from other members of the Picornaviridae by a very short IRES 290  nt , even without binding of the initiation factor eIF-4G , the translation can initiate. The IRES of the teschoviruses has structure and sequence similarities with the IRES of the hepatitis C virus .

Systematics

As of November 2018, the genus Teschovirus is structured as follows:

  • Genus Teschovirus
  • Species Teschovirus A (TeV-A)
  • Porcine Teschovirus 1 (PTV-1) (previously Porcine Enterovirus 1 )
  • Porcine Teschovirus 2 (PTV-2) (previously Porcine Enterovirus 2 )
  • Porcine Teschovirus 3 (PTV-3) (previously Porcine Enterovirus 3 )
  • Porcine Teschovirus 4 (PTV-4) (previously Porcine Enterovirus 4 )
  • Porcine Teschovirus 5 (PTV-5) (previously Porcine Enterovirus 5 )
  • Porcine Teschovirus 6 (PTV-6) (previously Porcine Enterovirus 6 )
  • Porcine Teschovirus 7 (PTV-7) (previously Porcine Enterovirus 7 )
  • Porcine Teschovirus 8 (PTV-8) (previously Porcine Enterovirus 11 )
  • Porcine Teschovirus 9 (PTV-9) (previously Porcine Enterovirus 12 )
  • Porcine Teschovirus 10 (PTV-10) (previously Porcine Enterovirus 13 )
  • Porcine Teschovirus 11 (PTV-11)
  • Porcine Teschovirus 12 (PTV-12)
  • Porcine Teschovirus 13 (PTV-13)
  • Teschoviruses without species assignment:
  • 'Porcines Teschovirus 14' to '16' ('PTV-14' bit 'PTV-16')

literature

  • G. Stanway, F. Brown et al .: Genus Teschovirus . In: CM Fauquet, MA Mayo et al .: Eighth Report of the International Committee on Taxonomy of Viruses , London, San Diego, 2004, p. 774
  • R. Zell, M. Dauber, A. Krumbholz et al .: Porcine teschoviruses comprise at least eleven distinct serotypes: molecular and evolutionary aspects . J. Virology (2001) 75: pp. 1620-1631 PMID 11160660
  • Y. Kaku, A. Sarai, Y. Murakami: Genetic reclassification of porcine enteroviruses . J Gen Virology (2001) 82 (Pt 2): pp. 417-424 PMID 11161281

Individual evidence

  1. ICTV Master Species List 2018b.v2 . MSL # 34, March 2019
  2. a b c d ICTV: ICTV Taxonomy history: Enterovirus C , EC 51, Berlin, Germany, July 2019; Email ratification March 2020 (MSL # 35)
  3. ^ A b NCBI: NCBI Taxonomy Browser: Teschovirus
  4. ICTV : Master Species List 2018a v1 MSL including all taxa updates since the 2017 release. Fall 2018 (MSL # 33)
  5. ICTV 2016 Master Species List # 31 with Acronyms, (Excel XLSX) , on: ViralZone , Swiss Institute of Bioinformatics (SIB)
  6. a b c Details: Teschovirus A , The Picornavirus Pages 2006-2019, The Pirbright Institute, UK. Retrieved February 17, 2019

Web links