Caulimoviridae

From MicrobeWiki, the student-edited microbiology resource

A Viral Biorealm page on the family Caulimoviridae

Contents 1 Baltimore Classification 1.1 Higher order taxa 1.2 Genera 2 Description and Significance 3 Genome Structure 4 Virion Structure of a Caulimoviridae 5 Reproduction Cycle of a Caulimoviridae in a Host Cell 6 Viral Ecology & Pathology 7 References

[edit] Baltimore Classification

[edit] Higher order taxa

Viruses; Retro-transcribing viruses; Caulimoviridae

[edit] Genera

Caulimovirus, Badnavirus, Soymovirus, Cavemovirus, Tungrovirus, Petuvirus

[edit] Description and Significance

All plant pararetroviruses are classified as members of the Caulimoviridae family. These viruses are similar to retroviruses, but instead of having an RNA genome, pararetroviruses have a DNA genome. (source: Marmey et al.)

[edit] Genome Structure

The genome structure of a caulimoviridae is either non-segmented or segmented. Because of this, the genome either consists of a single molecule or two segments of open circular double-stranded DNA. The length of the complete genome is 6800-7400-8175 nucleotides. There are terminally redundant sequences on the genome, which have direct terminal repeats. The genome has between one and eight open reading frames (ORFs). (sources: ICTVdB, Stavolone et al.)

[edit] Virion Structure of a Caulimoviridae

Caulimoviridae virions consist of a non-enveloped capsid. The capsid is isometric or bacilliform and exhibits icosahedral symmetry. The capsid has a diameter of 35-47.52-50nm and a length of 60-900nm. (source: ICTVdB)

[edit] Reproduction Cycle of a Caulimoviridae in a Host Cell

The replication of a caulimoviridae involves the reverse transcription of an RNA intermediate.

[edit] Viral Ecology & Pathology

Viruses in the Caulimoviridae family infect plants. Arthropods are the transmission vector. The viruses are distributed worldwide. (source: ICTVdB)

[edit] References

ICTVdB - The Universal Virus Database, version 3. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/

Marmey et al. "Characterization of the protease domain of Rice tungro bacilliform virus responsible for the processing of the capsid protein from the polyprotein." Virology Journal 2 (2005): 33.

Stavolone et al. "Characterization of Cestrum yellow leaf curling virus: a new member of the family Caulimoviridae." Journal of General Virology 84 (2003): 3459-3464.