Rudiviridae
| Rudivirus | |
|---|---|
| Virus classification | |
| Group: | Group I (dsDNA) |
| Order: | Ligamenvirales |
| Family: | Rudiviridae |
| Genus: | Rudivirus |
| Type species | |
|
Sulfolobus islandicus rod-shaped virus 2 |
|
| Species | |
Rudivirus is a genus of viruses in the order Ligamenvirales; it is the only genus in the family Rudiviridae. These viruses are non-enveloped, stiff-rod-shaped viruses with linear dsDNA genomes, that infect hyperthermophilic archaea of the kingdom Crenarchaeota. There are currently three species in this genus including the type species Sulfolobus islandicus rod-shaped virus 2. The family name derives from the Latin rudis, thin rod, referring to the virion shape.
The two main species, viruses SIRV1 and SIRV2, were produced by colony-cloned Sulfolobus islandicus strains. The two strains were isolated from samples taken in 1994 from different solfataric fields in Iceland, the Kverkfjöll and Hveragerdi, which are separated by a distance of 250 km. These Icelandic solfataric acidic hot springs reach a temperature of 88 °C and pH 2.5. As for its stability in many hosts, SIRV2 is a better candidate for the type species than SIRV1.
Acidianus rod-shaped virus 1, ARV1, the first member of the family Rudiviridae infecting hyperthermophilic archaea of the genus Acidianus, was isolated from a hot spring in Pozzuoli, Italy in 2005.
The Stygiolobus rod-shaped virus, SRV, which infects a hyperthermophilic Stygiolobus species, was isolated from a hot spring in the Azores, Portugal in 2008.
Members of the Rudiviridae share structural and genomic characteristics with viruses from the Lipothrixviridae family, which contains enveloped flexible filamentous viruses. Viruses from the two families have linear dsDNA genomes and share up to nine genes. In addition, the filamentous particles of rudiviruses and lipothrixviruses are built from structurally similar, homologous major capsid proteins. Due to these shared properties viruses from the two families are classified into an order Ligamenvirales.
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