Kappatorquevirus

Kappatorquevirus is a genus of viruses, in the family Anelloviridae. Pigs serve as natural hosts. There are currently two species in this genus including the type species Torque teno sus virus k2. Diseases associated with this genus include: possibly post-weaning multisystemic wasting syndrome (PMWS).[1][2]

Kappatorquevirus
Virus classification
(unranked): Virus
Realm: incertae sedis
Kingdom: incertae sedis
Phylum: incertae sedis
Class: incertae sedis
Order: incertae sedis
Family: Anelloviridae
Genus: Kappatorquevirus
Type species
Torque teno sus virus k2a

Taxonomy

Group: ssDNA

[2]

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
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References
  1. "Viral Zone". ExPASy. Retrieved 13 August 2015.
  2. ICTV. "Virus Taxonomy: 2014 Release". Retrieved 13 August 2015.
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