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Avihepadnavirus

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This is an old revision of this page, as edited by Moth60 (talk | contribs) at 13:47, 3 February 2021 (Added links to ICTV Profile and Report, corrected italicisation of genus). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Avihepadnavirus
Virus classification Edit this classification
(unranked): Virus
Realm: Riboviria
Kingdom: Pararnavirae
Phylum: Artverviricota
Class: Revtraviricetes
Order: Blubervirales
Family: Hepadnaviridae
Genus: Avihepadnavirus
Species

Avihepadnavirus is a genus of viruses, in the family Hepadnaviridae.[1] Birds serve as natural hosts. There are three species in this genus including the type species Duck hepatitis B virus.[1] Diseases associated with this genus include: hepatitis, hepatocellular carcinomas (chronic infections), and cirrhosis.[2][3]

Structure

Viruses in the genus Avihepadnavirus are enveloped, with spherical geometries, and T=4 symmetry. The diameter is around 42 nm. Genomes are circular, around 3.2kb in length. The genome codes for 7 proteins.[1][2]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Avihepadnavirus Icosahedral T=4 Non-enveloped Circular Monopartite

Life cycle

Viral replication is nucleo-cytoplasmic. Replication follows the dsDNA(RT) replication model. Dna templated transcription, specifically dsdna(rt) transcription, with some alternative splicing mechanism is the method of transcription. Translation takes place by ribosomal shunting. The virus exits the host cell by budding, and nuclear pore export. Birds serve as the natural host. Transmission routes are parental, sexual, and blood.[1][2]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Avihepadnavirus Birds Hepatocytes Cell receptor endocytosis Budding Nucleus Cytoplasm Vertical: parental; sex; blood

References

  1. ^ a b c d "ICTV Report Hepadnaviridae".
  2. ^ a b c "Viral Zone". ExPASy. Retrieved 12 June 2015.
  3. ^ Guo, Haitao; Mason, William (2005). "Identification and Characterization of Avihepadnaviruses Isolated from Exotic Anseriformes Maintained in Captivity". Journal of Virology. 79 (5). American Society for Microbiology: 2729–2742. doi:10.1128/JVI.79.5.2729-2742.2005. PMC 548436. PMID 15708992.

External links