Badnavirus: Difference between revisions
No edit summary |
|||
| Line 1: | Line 1: | ||
[[Image:badnavirus.gif|thumb|right|Badnavirus. From [http://www.ncbi.nlm.nih.gov/ICTVdb/WIntkey/Images/b1.gif ICTVdB Descriptions]]] | |||
==Baltimore Classification== | ==Baltimore Classification== | ||
Revision as of 20:05, 28 June 2006
Baltimore Classification
Higher order taxa
Viruses; Retro-transcribing viruses; Caulimoviridae; Badnavirus
Species
Banana streak GF virus, Banana streak OL virus, Sugarcane bacilliform IM virus, Taro bacilliform virus (examples)
Description and Significance
Genome Structure
The genome is not segmented and contains a single molecule of circular. The genome is -Rt and it is a double-stranded DNA that forms an open cicle. The complete genome is sequenced and 7200-76000 nucleotides long. The genome guanine+cytosime content is 39.6-44.1 %. The genome has terminally redundant sequences that have direct terminal repeats and are reiterated internally in inverted form. (source: ICTV dB Descriptions)
The virions of a badnavirus consist of a capsid that is not enveloped. The capsid is elongated and exhibits an icosahedral symmetry. The capsid is bacilliform and the capsid shells of the virions are composed of multiple layers. They are 95-130 nm long, or 60-900 nm, and 24-30-35 nm wide. (source: ICTV dB Descriptions)
