title: Terminal-repeat retrotransposons with GAG domain 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.
authors.affiliation: 2EI UMR5244 Université de Perpignan Via Domitia, UMR 5244 CNRS Ecologie et Evolution des Interactions (2EI), Perpignan, France.
authors.forename: Cristian
authors.initials: C
authors.lastname: Chaparro
authors.affiliation: Institut de Recherche pour le Développement (IRD), UMR DIADE (CIRAD, IRD, UM2), Montpellier, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gayraud
authors.affiliation: Departamento de Biologia Geral, CCB Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil.
authors.forename: Rogerio Fernandes
authors.initials: RF
authors.lastname: de Souza
authors.affiliation: Departamento de Botanica, Instituto de Biociencias, Univ Estadual Paulista, UNESP, Rio Claro, SP, Brazil.
authors.forename: Douglas Silva
authors.initials: DS
authors.lastname: Domingues
authors.affiliation: Université Jean Lorougnon Guédé, Daloa Côte d'Ivoire.
authors.forename: Sélastique
authors.initials: S
authors.lastname: Akaffou
authors.affiliation: Departamento de Biologia Geral, CCB Universidade Estadual de Londrina (UEL), Londrina, PR, Brazil.
authors.forename: Andre Luis
authors.initials: AL
authors.lastname: Laforga Vanzela
authors.affiliation: Institut de Recherche pour le Développement (IRD), UMR DIADE (CIRAD, IRD, UM2), Montpellier, France.
authors.forename: Alexandre de
authors.initials: Ad
authors.lastname: Kochko
authors.affiliation: Nestlé R&D Tours, Notre Dame d'Oé, Tours, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Rigoreau
authors.affiliation: Nestlé R&D Tours, Notre Dame d'Oé, Tours, France.
authors.forename: Dominique
authors.initials: D
authors.lastname: Crouzillat
authors.affiliation: Institut de Recherche pour le Développement (IRD), UMR DIADE (CIRAD, IRD, UM2), Montpellier, France.
authors.forename: Serge
authors.initials: S
authors.lastname: Hamon
authors.affiliation: Institut de Recherche pour le Développement (IRD), UMR DIADE (CIRAD, IRD, UM2), Montpellier, France.
authors.forename: Perla
authors.initials: P
authors.lastname: Hamon
authors.affiliation: Institut de Recherche pour le Développement (IRD), UMR IPME, Montpellier, France romain.guyot@ird.fr.
authors.forename: Romain
authors.initials: R
authors.lastname: Guyot
mesh_terms: D000465:Algorithms; D001483:Base Sequence; D040503:Coffea / Q000235:genetics*; D017124:Conserved Sequence / Q000235:genetics; D018628:Gene Dosage; D018745:Genome, Plant; D008390:Markov Chains; D058977:Molecular Sequence Annotation; D008969:Molecular Sequence Data; D005810:Multigene Family; D018626:Retroelements / Q000235:genetics*; D020079:Terminal Repeat Sequences / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D018626:Retroelements
keywords: GAG; LTR-retrotransposons; conservation in plant genomes; nonautonomous elements