Terminal-repeat Retrotransposons with GAG domain (TR-GAG) in plant genomes: A new testimony on the complex world of transposable elements

Abstract : 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.
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Genome Biology and Evolution, Society for Molecular Biology and Evolution, 2015, 7 (2), pp.493-504. 〈10.1093/gbe/evv001〉
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Soumis le : jeudi 11 juin 2015 - 10:31:44
Dernière modification le : jeudi 11 janvier 2018 - 06:27:31

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Cristian Chaparro, T. Gayraud, R.F. De Souza, D.S. Domingues, S. Akaffou, et al.. Terminal-repeat Retrotransposons with GAG domain (TR-GAG) in plant genomes: A new testimony on the complex world of transposable elements. Genome Biology and Evolution, Society for Molecular Biology and Evolution, 2015, 7 (2), pp.493-504. 〈10.1093/gbe/evv001〉. 〈hal-01162666〉

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