title: MERE1, a low-copy-number copia-type retroelement in Medicago truncatula active during tissue culture.
abstract: We have identified an active Medicago truncatula copia-like retroelement called Medicago RetroElement1-1 (MERE1-1) as an insertion in the symbiotic NSP2 gene. MERE1-1 belongs to a low-copy-number family in the sequenced Medicago genome. These copies are highly related, but only three of them have a complete coding region and polymorphism exists between the long terminal repeats of these different copies. This retroelement family is present in all M. truncatula ecotypes tested but also in other legume species like Lotus japonicus. It is active only during tissue culture in both R108 and Jemalong Medicago accessions and inserts preferentially in genes.
authors: Institut des Sciences du Végétal, CNRS, 91198 Gif sur Yvette, France.
authors: Alexandra
authors: A
authors: Rakocevic
authors: Samuel
authors: S
authors: Mondy
authors: Leïla
authors: L
authors: Tirichine
authors: Viviane
authors: V
authors: Cosson
authors: Lysiane
authors: L
authors: Brocard
authors: Anelia
authors: A
authors: Iantcheva
authors: Anne
authors: A
authors: Cayrel
authors: Benjamin
authors: B
authors: Devier
authors: Ghada Ahmed
authors: GA
authors: Abu El-Heba
authors: Pascal
authors: P
authors: Ratet
mesh_terms: D001483:Base Sequence; D002478:Cells, Cultured; D019295:Computational Biology; D019175:DNA Methylation; D018744:DNA, Plant / Q000235:genetics; D018628:Gene Dosage; D046913:Medicago truncatula / Q000235:genetics*; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D011110:Polymorphism, Genetic; D018626:Retroelements; D017422:Sequence Analysis, DNA; D020079:Terminal Repeat Sequences
chemical_list: D018744:DNA, Plant; D018626:Retroelements