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Terminal-Repeat Retrotransposons in Miniature (TRIMs) in bivalves

Šatović, Eva; Luchetti, Andrea; Pasantes, Juan; García-Souto, Daniel; Cedilak, Andrea; Plohl, Miroslav (2019) Terminal-Repeat Retrotransposons in Miniature (TRIMs) in bivalves. Scientific reports, 9 . ISSN 2045-2322

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Terminal repeat retrotransposons in miniature (TRIMs) are small non-autonomous LTR retrotransposons consisting of two terminal direct repeats surrounding a short internal domain. The detection and characterization of these elements has been mainly limited to plants. Here we present the first finding of a TRIM element in bivalves, and among the first known in the kingdom Animalia. Class Bivalvia has high ecological and commercial importance in marine ecosystems and aquaculture, and, in recent years, an increasing number of genomic studies has addressed to these organisms. We have identified biv-TRIM in several bivalve species: Donax trunculus, Ruditapes decussatus, R. philippinarum, Venerupis corrugata, Polititapes rhomboides, Venus verrucosa, Dosinia exoleta, Glycymeris glycymeris, Cerastoderma edule, Magallana gigas, Mytilus galloprovincialis. biv-TRIM has several characteristics typical for this group of elements, exhibiting different variations. In addition to canonically structured elements, solo-TDRs and tandem repeats were detected. The presence of this element in the genome of each species is <1%. The phylogenetic analysis showed a complex clustering pattern of biv-TRIM elements, and indicates the involvement of horizontal transfer in the spreading of this element.

Item Type: Article
Uncontrolled Keywords: LTR retrotransposons; Terminal repeat retrotransposons in miniature; bivalves, evolution, horizontal transfer
Subjects: NATURAL SCIENCES > Biology > Biochemistry and Molecular Biology
NATURAL SCIENCES > Biology > Genetics, Evolution and Phylogenetics
Divisions: Division of Molecular Biology
Project titleProject leaderProject codeProject type
Evolucija, osobitosti i funkcionalne interakcije sekvenci satelitnih DNA-Miroslav Plohl098-0982913-2756MZOS
Depositing User: Eva Šatović Vukšić
Date Deposited: 07 Dec 2020 08:33
DOI: 10.1038/s41598-019-56502-y

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