Institut de biologie moléculaire des plantes, UPR 406 CNRS,
12, rue du Général-Zimmer, 67084 Strasbourg Cedex, France
- Key words: Pararetrovirus - Caulimovirus - Badnavirus - Reverse transcriptase - Viroplasme.
- Page(s) : 111-20
- Published in: 1997
Plant caulimoviruses and badnaviruses are double-stranded DNA viruses which use reverse transcriptase to replicate their genome. They are referred to as retroid viruses or pararetroviruses, as also the mammalian hepadnaviruses, to distinguish them from the true retroviruses. Caulimoviruses and badnaviruses share many features in gene structure, organization and function. Such similarities suggest a phylogenetic relationship between these two groups of plant viruses. However, caulimoviruses differ from badnaviruses by several aspects. In particular, the former code for a multifunctional protein involved in crucial steps of the viral life cycle.