Abstract
Portogloboviridae is a family of viruses with circular, double-stranded DNA genomes of about 20 kbp. Their icosahedral virions have a diameter of 87 nm, and consist of an outer protein shell, an inner lipid layer and a nucleoprotein core wound up into a spherical coil. Portogloboviruses infect hyperthermophilic archaea of the genus Saccharolobus, order Sulfolobales and are presumably nonlytic. Portogloboviruses encode mini-CRISPR arrays which they use to compete against other co-infecting viruses. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Portogloboviridae, which is available at ictv.global/report/portogloboviridae.
Highlights
Portogloboviridae is a family of viruses with circular, double-s tranded DNA genomes of about 20 kbp
Sulfolobus polyhedral virus 1 (KY780159), species Sulfolobus alphaportoglobovirus 1, genus Alphaportoglobovirus Icosahedral virion, 87 nm in diameter, consisting of an outer protein shell, an inner lipid layer and a spherical nucleoprotein core Circular, double-stranded DNA genome of about 20 kbp Viral replication occurs without observable cell lysis Not characterized Hyperthermophilic archaea of the genus Saccharolobus, order Sulfolobales One genus, two species
With a diameter of about 87 nm from vertex to vertex and 83 nm from facet to facet (Table 1, Fig. 1a) and consist of three structural units: (a) the outer icosahedral protein shell, (b) the subcapsomer proteins and lipid membrane and (c) a circular nucleoprotein wrapped into a spherical core (Fig. 1b) [1, 2]
Summary
Portogloboviridae is a family of viruses with circular, double-s tranded DNA genomes of about 20 kbp. Example: Virion Genome Replication Translation Host range Taxonomy Sulfolobus polyhedral virus 1 (KY780159), species Sulfolobus alphaportoglobovirus 1, genus Alphaportoglobovirus Icosahedral virion, 87 nm in diameter, consisting of an outer protein shell, an inner lipid layer and a spherical nucleoprotein core Circular, double-stranded DNA genome of about 20 kbp Viral replication occurs without observable cell lysis Not characterized Hyperthermophilic archaea of the genus Saccharolobus, order Sulfolobales One genus, two species
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