Carmotetraviridae

Carmotetraviridae is a family of viruses; there is currently only one genus in this family, Alphacarmotetravirus, and one species in this genus, the type species Providence virus. Lepidopteran insects serve as natural hosts.[1][2]

Alphacarmotetravirus
Transmission electron micrograph of providence virus (PrV) virion
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Tolucaviricetes
Order: Tolivirales
Family: Carmotetraviridae
Genus: Alphacarmotetravirus
Type species
Providence virus

Taxonomy

Group: ssRNA(+)

[2]

Structure
Genome of providence virus (PrV).

Viruses in Carmotetraviridae are non-enveloped, with icosahedral geometries, and T=4 symmetry. The diameter is around 40 nm. Genomes are linear, around 6.1kb in length. The genome codes for 2 proteins, and has 3 open reading frames.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
AlphacarmotetravirusIcosahedralT=4Non-envelopedLinear

Life cycle

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 suppression of termination. Lepidopteran insects serve as the natural host. Transmission routes are oral.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
AlphacarmotetravirusLepidopteran insectsMidgutUnknownUnknownCytoplasmCytoplasmOral

References
  1. "Viral Zone". ExPASy. Retrieved 13 August 2015.
  2. ICTV. "Virus Taxonomy: 2014 Release". Retrieved 23 November 2015.
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