1. Terminal-Repeat Retrotransposons with GAG Domain in Plant Genomes: A New Testimony on the Complex World of Transposable Elements.
- Author
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Chaparro, Cristian, Gayraud, Thomas, de Souza, Rogerio Fernandes, Domingues, Douglas Silva, Akaffou, Sélastique, Laforga Vanzela, Andre Luis, Kochko, Alexandre de, Rigoreau, Michel, Crouzillat, Dominique, Hamon, Serge, Hamon, Perla, and Guyot, Romain
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RETROTRANSPOSONS , *TRANSPOSONS , *GENOME size , *GENOTYPES , *HAPLOIDY - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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