Terminal-repeat retrotransposons with GAG domain in plant genomes : a new testimony on the complex world of transposable elements Chaparro, C. Gayraud, T. Souza, R.F. de Domingues, D.S. Akaffou, S. Laforga Vanzela, A.L. /Kochko, Alexandre de Rigoreau, M. Crouzillat, D. /Hamon, Serge /Hamon, Perla /Guyot, Romain PLANTE CAFE ADN VARIABILITE GENETIQUE EVOLUTION RETROTRANSPOSON 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. 2015 text https://www.documentation.ird.fr/hor/fdi:010063587 fdi:010063587 Chaparro C., Gayraud T., Souza R.F. de, Domingues D.S., Akaffou S., Laforga Vanzela A.L., Kochko Alexandre de, Rigoreau M., Crouzillat D., Hamon Serge, Hamon Perla, Guyot Romain. Terminal-repeat retrotransposons with GAG domain in plant genomes : a new testimony on the complex world of transposable elements. 2015, 7 (2), 493-504 EN