Caulimoviridae (Plant Pararetroviruses)

Roger Hull, John Innes Centre, Norwich, UK

Published online: December 2007

DOI: 10.1002/9780470015902.a0000746.pub2

The Caulimoviridae family comprises six genera whose members replicate by reverse transcription and whose virus particles contain double-stranded deoxyribonucleic acid (DNA); hence they are also called pararetroviruses. It is the only plant virus taxon whose members have double-stranded DNA genomes.

Keywords: caulimoviruses; badnaviruses; plant viruses; retroviruses; reverse transcription

Figure 1. Electron micrographs of particles of (a) CaMV (bar, 50 nm) and (b) RTBV (bar, 100 nm) negatively stained with 2% uranyl acetate.
Figure 2. Genome organizations of members of the Caulimoviridae; abbreviations of virus names in Table 1. The yellow double circle represents the double-stranded DNA genome with the green circles indicating the positions of the single-strand discontinuities. The red blocks on the CaMV map show the positions of the two promoters. The inner blue arcs represent the ORFs; RTBV ORF I is dashed to indicate that it does not have a conventional start codon. The positions of the RNA transcripts of CaMV are indicated by the outer blue circle and arc with the 5¢ end shown by filled box and 3¢ end by arrowhead. (Data for CaMV, Franck et al. (1980) ; SoyCMV, Hasegawa et al. (1989) ; CVMV, Calvert et al. (1995) ; PVCV, Richert-Pöggeler and Shepherd (1997); CoYMV, Medberry et al. (1990) ; RTBV, Hay et al. (1991), Qu et al. (1991))
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 References
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    Richert-Pöggeler KR and Shepherd RJ (1997) Petunia vein-clearing virus: a plant pararetrovirus with the core sequence for an integrase function. Virology 236: 137–146.
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 Further Reading
    book Hull R (1995) "Genus Caulimovirus". In: Murphy FA, Fauquet CM and Bishop DHL et al. (eds) Virus Taxonomy. Sixth Report of the International Committee on Taxonomy of Viruses, pp. 189–192. Vienna: Springer.
    book Lockhart BEL, Olszewski NE and Hull R (1995) "Genus Badnavirus". In: Murphy FA, Fauquet CM and Bishop DHL et al. (eds) Virus Taxonomy. Sixth Report of the International Committee on Taxonomy of Viruses, pp. 185–188. Vienna: Springer.
    Rothnie HM, Chapdelaine Y and Hohn T (1994) Pararetroviruses and retroviruses: a comparative review of viral gene structure and gene expression strategies. Advances in Virus Research 44: 1–67.

Related Sub-Topics:

Viruses Infecting Plants | DNA Viruses | Plant Disease
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Article Title: Caulimoviridae (Plant Pararetroviruses)
 
How to Cite close
Hull, Roger(Dec 2007) Caulimoviridae (Plant Pararetroviruses). In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1002/9780470015902.a0000746.pub2]