Terminal-repeat retrotransposons with GAG domain in plant genomes: a new testimony on the complex world of transposable elements

• Autor(a) principal: Chaparro, Cristian
• Data de Publicação: 2015
• Outros Autores: Gayraud, Thomas, Souza, Rogerio Fernandes de, Domingues, Douglas Silva [UNESP], Akaffou, Selastique, Laforga Vanzela, Andre Luis, Kochko, Alexandre de, Rigoreau, Michel, Crouzillat, Dominique, Hamon, Serge, Hamon, Perla, Guyot, Romain
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://gbe.oxfordjournals.org/content/7/2/493; http://hdl.handle.net/11449/128734
• topic: Nonautonomous elements; LTR-retrotransposons; GAG; Conservation in plant genomes

A novel structure of nonautonomous long terminal repeat (LTR) retrotransposons called terminal repeat with GAG domain (TR-GAG) has been described in plants, both in monocotyledonous, dicotyledonous and basal angiosperm genomes. TR-GAGs are relatively short elements in length (<4 kb) showing the typical features of LTR-retrotransposons. However, they carry only one open reading frame coding for the GAG precursor protein involved for instance in transposition, the assembly, and the packaging of the element into the virus-like particle. GAG precursors show similarities with both Copia and Gypsy GAG proteins, suggesting evolutionary relationships of TR-GAG elements with both families. Despite the lack of the enzymatic machinery required for their mobility, strong evidences suggest that TR-GAGs are still active. TR-GAGs represent ubiquitous nonautonomous structures that could be involved in the molecular diversities of plant genomes.