Difference between revisions of "Birnaviridae"

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(Genome Structure)
(Virion Structure of a Birnaviridae)
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==Virion Structure of a Birnaviridae==
 
==Virion Structure of a Birnaviridae==
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The virions of a birnaviridae have a simple construction. The virions are not enveloped and consist of a capsid. The capsid is round and exhibits icosahedral symmetry.
  
 
==Reproduction Cycle of a Birnaviridae in a Host Cell==
 
==Reproduction Cycle of a Birnaviridae in a Host Cell==

Revision as of 16:33, 14 June 2006

Baltimore Classification

Higher order taxa

Viruses; dsRNA viruses; Birnaviridae

Genera

Aquabirnavirus, Avibirnavirus, Entomobirnavirus

Description and Significance

Birnaviruses infect animals: vertebrates, insects, molluscs and crustaceans. They are bi-RNA viruses and have double stranded RNA genomes in two components.

Genome Structure

The genome of Binyaviridae is segmented and consists of linear double-stranded RNA. Minor species of non-genomic nucleic acid are also found in virions. The complete genome is 5880-6400 nucleotides long. Segment A has been fully sequenced and the complete sequence is 3100-3200 nucleotides long while segment B is 2750-2850 nucleotides long. The genome guanine+cytosine content is 45.5-54.5 %. The 5'-end of the genome has a cap on both segments genome-linked protein (VPg). The multipartite genome is found in one type of particle only. (source ICTV dB Descriptions)

Virion Structure of a Birnaviridae

The virions of a birnaviridae have a simple construction. The virions are not enveloped and consist of a capsid. The capsid is round and exhibits icosahedral symmetry.

Reproduction Cycle of a Birnaviridae in a Host Cell

Viral Ecology & Pathology

References