Tectiviridae
From MicrobeWiki, the student-edited microbiology resource
A Viral Biorealm page on the family Tectiviridae
Contents |
Baltimore Classification
Higher order taxa
Viruses; dsDNA viruses, no RNA stage; Tectiviridae
Genera
Tectivirus
Description and Significance
Genome Structure
The genome of tectiviridae is not segmented and contains a single molecule of linear double-stranded DNA. The complete genome is 147000-157000 nucleotides long. (source: ICTVdB Descriptions)
Virion Structure of a Tectiviridae
The virions of a tectiviridae consist of a capsid and an internal lipid membrane. The virus capsid is not enveloped. The virions do not have tails but can produce tail-like tubes upon adsorption of after chloroform treatment. The capsid is round and exhibits an icosahedral symmetry. The isometric capsid has a diameter of 63 nm. The capsid shells of virions are composed of two layers. The outer capsid consists of a smooth, rigid 3 nm thick protein shell and appears to have a hexagonal outline. The surface projections are distinct 20 nm long spikes protruding from each apex. The inner capsids consist of a 5-6 nm flexible shell made from a thick lipoprotein vescile. The genome forms a tightly packed coil. (source: ICTVdB Descriptions)
