Ambidensovirus

From Wikipedia, the free encyclopedia
  (Redirected from Densovirus)
Jump to: navigation, search
Ambidensovirus
Virus classification
Group: Group II (ssDNA)
Order: Unassigned
Family: Parvoviridae
Subfamily: Densovirinae
Genus: Ambidensovirus
Type species
Lepidopteran ambidensovirus 1

The virus genus Ambidensovirus belongs to the Densovirinae subfamily which belongs to the Parvoviridae family. The viruses of this genus are single-stranded DNA viruses. The viruses of this genus are invertebrate viruses, infecting crustaceans and insects.

There are currently six recognized species of Ambidensovirus. They are Blattodean ambidensovirus 1 and Blattodean ambidensovirus 2, Dipteran ambidensovirus 1, Hemipteran ambidensovirus 1, Lepidopteran ambidensovirus 1, and Orthopteran ambidensovirus 1.

Structure[edit]

Virions consist of non-enveloped capsids that have a round appearance and display icosahedral symmetry.[1] The virions each have an isometric (and therefore spherical) nucleocapsid with a diameter of either 18-22 nm or 20-26 nm.[1] Sixty capsomers are present in each capsid.[1] The structure of each capsomer is described as "a quadrilateral 'kite-shaped' wedge"; the surface is said to have a rough appearance with small projections.[1] The centre of capsids are sometimes visualised as appearing dark due to stain penetration in preparations where only a single species is retrieved. The virions do not appear to contain lipids. The buoyant density (in CsCl) of the virions is 1.4-1.44 g cm−3.[1]

Genome[edit]

Ambidensoviruses have non-segmented genomes that contain a single linear molecule of single-stranded DNA. The genome codes for structural proteins are about 5000 nucleotides in length and could either be negative-sense or positive-sense. Conserved nucleotide sequences of usually 120-300 or more nucleotides are present at the 3'-terminus and an inverted repeat of this could also be found at the 5'-terminus.[1]

References[edit]

  1. ^ a b c d e f "Densovirinae". ICTVdB - The Universal Virus Database, version 4. Retrieved 2007-05-15. 

External links[edit]