Kappatorquevirus

Kappatorquevirus is a genus of viruses, in the family Anelloviridae. Pigs serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: possibly post-weaning multisystemic wasting syndrome (PMWS).[1][2]

Kappatorquevirus
Virus classification Edit this classification
(unranked): Virus
Family: Anelloviridae
Genus: Kappatorquevirus
Species
  • Kappatorquevirus suidak2a
  • Kappatorquevirus suidak2b
Synonyms

species Kappatorquevirus suidak2a

  • Kappatorquevirus suidak2a ICTV 2022
  • Torque teno sus virus k2a ICTV 2015
  • Torque teno sus virus k2 ICTV 2011

species Kappatorquevirus suidak2b

  • Kappatorquevirus suidak2b ICTV 2022
  • Torque teno sus virus k2b ICTV 2015

Structure

Viruses in Kappatorquevirus are non-enveloped, with icosahedral geometries, and T=1 symmetry. The diameter is around 19-27 nm. Genomes are circular, around 2.7kb in length. The genome codes for 4 proteins, and has 3 open reading frames.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
KappatorquevirusIcosahedralT=1Non-envelopedCircularMonopartite

Life cycle

Viral replication is nuclear. Entry into the host cell is achieved by penetration into the host cell. Replication follows the ssDNA rolling circle model. DNA-templated transcription, with some alternative splicing mechanism is the method of transcription. The virus exits the host cell by nuclear pore export. Pigs serve as the natural host. Transmission routes are parental.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
KappatorquevirusPigsNoneCell receptor endocytosisBuddingNucleusNucleusVertical; horizontal

References
  1. "Viral Zone". ExPASy. Retrieved 13 August 2015.
  2. "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 23 May 2021.
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