title: Molecular characterization and phylogenetic position of a new mariner-like element in the coastal crab, Pachygrapsus marmoratus.
abstract: Mariner-like elements (MLEs) are class-II transposable elements that move within the genome of their hosts by means of a DNA-mediated "cut and paste" mechanism. MLEs have been identified in several organisms, from most of the phyla. Nevertheless, only a few of the sequences characterized contain an intact open reading frame. Investigation of the genome of a coastal crab, Pachygrapsus marmoratus, has identified nine Pacmmar elements, two of which have an open reading frame encoding a putatively functional transposase. Nucleic acid analyses and comparison with the previous data showed that the GC contents of MLEs derived from coastal organisms such as P. marmoratus are significantly higher than those of terrestrial MLEs and significantly lower than those of hydrothermal ones. Furthermore, molecular phylogeny analyses have shown that Pacmmar elements constitute a new lineage of the irritans subfamily within the mariner family.
authors.affiliation: Laboratoire de Biologie et Génétique Evolutive (EA3265), Avenue Olivier Messiaen, 72085 Le Mans cedex, France.
authors.forename: Quynh-Trang
authors.initials: QT
authors.lastname: Bui
authors.forename: Laurence
authors.initials: L
authors.lastname: Delaurière
authors.forename: Nathalie
authors.initials: N
authors.lastname: Casse
authors.forename: Violaine
authors.initials: V
authors.lastname: Nicolas
authors.forename: Marc
authors.initials: M
authors.lastname: Laulier
authors.forename: Benoît
authors.initials: B
authors.lastname: Chénais
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001482:Base Composition; D001483:Base Sequence; D003386:Brachyura / Q000235:genetics*; D003001:Cloning, Molecular; D019295:Computational Biology / Q000379:methods; D004247:DNA / Q000378:metabolism; D004251:DNA Transposable Elements / Q000235:genetics*; D008969:Molecular Sequence Data; D019913:Nuclear Localization Signals; D016366:Open Reading Frames; D010802:Phylogeny; D012984:Software; D019895:Transposases / Q000378:metabolism
chemical_list: D004251:DNA Transposable Elements; D019913:Nuclear Localization Signals; D004247:DNA; D019895:Transposases