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Virus classification e
(unranked): Virus
Realm: Riboviria
Phylum: incertae sedis
Family: Alphatetraviridae

Alphatetraviridae is a family of viruses. Moths and butterflies serve as natural hosts. There are currently ten species in this family, divided among 2 genera. Infection outcome varies from unapparent to lethal.[1][2]


Group: ssRNA(+)



Viruses in Alphatetraviridae are non-enveloped, with icosahedral geometries, and T=4 symmetry. The diameter is around 40 nm. Genomes are linear and non-segmented, bipartite, around 6.5kb in length.[1]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Omegatetravirus Icosahedral T=4 Non-enveloped Linear Segmented
Betatetravirus Icosahedral T=4 Non-enveloped Linear Monopartite

Life cycle[edit]

Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded rna virus transcription is the method of transcription. Translation takes place by leaky scanning, and ribosomal skipping. Moths and butterflies serve as the natural host. Transmission routes are oral.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Omegatetravirus Moths; butterflies Midgut Cell receptor endocytosis Budding Cytoplasm Cytoplasm Oral
Betatetravirus Moths; butterflies Midgut Cell receptor endocytosis Budding Cytoplasm Cytoplasm Oral


  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.

External links[edit]