Abstract
The family Spiraviridae includes viruses that replicate in hyperthermophilic archaea from the genus Aeropyrum . The non-enveloped, hollow, cylindrical virions are formed from a coiling fibre that consists of two intertwining halves of a single circular nucleoprotein filament. A short appendage protrudes from each end of the cylindrical virion. The genome is circular, positive-sense, single-stranded DNA of 24 893 nucleotides. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) report on the family Spiraviridae, which is available at ictv.global/report/spiraviridae.
Highlights
The family Spiraviridae includes viruses that replicate in hyperthermophilic archaea from the genus Aeropyrum
The spring-forming nucleoprotein fibre itself has a helical structure that is formed by two intertwining halves of a circular, single-stranded DNA molecule covered by capsid proteins (Fig. 1)
The flexible coil of the native virion is prone to contraction and stiffening upon dehydration due to uranyl acetate staining, as is revealed by differences in the size and appearance of virions embedded in vitreous ice and those stained with uranyl acetate (Fig. 1) [1]
Summary
The family Spiraviridae includes viruses that replicate in hyperthermophilic archaea from the genus Aeropyrum. Typical member Virion Genome Replication Translation Host range Taxonomy Aeropyrum coil-shaped virus (HE681887), species Aeropyrum coil-shaped virus, genus Alphaspiravirus Coil-shaped, 230±10×19±1 nm, with appendages of 20±2 nm at each end; non-enveloped Circular, positive-sense, single-stranded DNA of 24 893 nucleotides Non-lytic, chronic infection Not characterized Hyperthermophilic archaea from the genus Aeropyrum Family Spiraviridae, genus Alphaspiravirus, single species Virions of Aeropyrum coil-s haped virus are non-e nveloped, hollow, cylindrical particles, 230±10×19±1 nm, formed by coiling of a nucleoprotein fibre as a helical spring (Table 1, Fig. 1) [1].
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