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Virus classification
Group: Group I (dsDNA)
Family: Fuselloviridae

Fuselloviridae is a family of viruses. Sulfolobus species, specifically shibatae, solfataricus, and islandicus, serve as natural hosts. There are currently nine species in this family, divided among 2 genera.[1][2] The Fuselloviridae are ubiquitous in high-temperature (≥70 °C), acidic (pH ≤4) hot springs around the world. They are one of the few viruses to possess a lipid membrane and a protective inner capsid in the form of a core.


Group: dsDNA



Viruses in Fuselloviridae are enveloped, with lemon-shaped geometries. The diameter is around 60 nm, with a length of 100 nm. Genomes are circular, around 17.3kb in length.[1]

Genus Structure Symmetry Capsid Genomic Arrangement Genomic Segmentation
Alphafusellovirus Lemon-shaped Enveloped Circular Monopartite
Betafusellovirus Lemon-shaped Enveloped Circular Monopartite

Life Cycle[edit]

Viral replication is cytoplasmic. Entry into the host cell is achieved by adsorption into the host cell. Dna templated transcription is the method of transcription. Sulfolobus shibatae, sulfolobus solfataricus, and sulfolobus islandicus serve as the natural host.[1]

Genus Host Details Tissue Tropism Entry Details Release Details Replication Site Assembly Site Transmission
Alphafusellovirus Archea: thermolophilic None Injection Budding Cytoplasm Cytoplasm Passive diffusion
Betafusellovirus Archea: thermolophilic None Injection Budding Cytoplasm Cytoplasm Passive diffusion


  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]