Betafusellovirus
''Fuselloviridae'' is a family of viruses. Sulfolobus species, specifically shibatae, solfataricus, and islandicus, serve as natural hosts. There are two genera in the family. Viruses in ''Fuselloviridae'' are ubiquitous in high-temperature (≥70 °C), acidic (pH ≤4) hot spring A hot spring, hydrothermal spring, or geothermal spring is a Spring (hydrology), spring produced by the emergence of Geothermal activity, geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow ...s around the world. Taxonomy The family contains the following genera: * '' Alphafusellovirus'' * '' Betafusellovirus'' Structure Viruses in ''Fuselloviridae'' are enveloped, with lemon-shaped geometries. The diameter is around 60 nm, with a length of 100 nm. Genomes consist of double-stranded circular DNA, around 17.3 kb in length. Biochemical characterization of SSV1, a prototypical fusellovirus, showed that virions are composed o ...
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