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Article

Insertion Hot Spots of DIRS1 Retrotransposon and Chromosomal Diversifications among the Antarctic Teleosts Nototheniidae

1
Laboratoire Evolution Paris Seine, Sorbonne Université, CNRS, Univ Antilles, Institut de Biologie Paris Seine (IBPS), F-75005 Paris, France
2
Istituto per lo Studio degli Impatti Antropici e la Sostenibilità in Ambiente Marino (IAS), National Research Council (CNR), 16149 Genoa, Italy
3
Institut de Systématique, Evolution, Biodiversité (ISYEB), Museum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, 57, rue Cuvier, 75005 Paris, France
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(3), 701; https://doi.org/10.3390/ijms20030701
Received: 28 December 2018 / Revised: 30 January 2019 / Accepted: 3 February 2019 / Published: 6 February 2019
(This article belongs to the Special Issue Transposable Elements)
By their faculty to transpose, transposable elements are known to play a key role in eukaryote genomes, impacting both their structuration and remodeling. Their integration in targeted sites may lead to recombination mechanisms involved in chromosomal rearrangements. The Antarctic fish family Nototheniidae went through several waves of species radiations. It is a suitable model to study transposable element (TE)-mediated mechanisms associated to genome and chromosomal diversifications. After the characterization of Gypsy (GyNoto), Copia (CoNoto), and DIRS1 (YNoto) retrotransposons in the genomes of Nototheniidae (diversity, distribution, conservation), we focused on their chromosome location with an emphasis on the three identified nototheniid radiations (the Trematomus, the plunderfishes, and the icefishes). The strong intrafamily TE conservation and wide distribution across species of the whole family suggest an ancestral acquisition with potential secondary losses in some lineages. GyNoto and CoNoto (including Hydra and GalEa clades) mostly produced interspersed signals along chromosomal arms. On the contrary, insertion hot spots accumulating in localized regions (mainly next to centromeric and pericentromeric regions) highlighted the potential role of YNoto in chromosomal diversifications as facilitator of the fusions which occurred in many nototheniid lineages, but not of the fissions. View Full-Text
Keywords: Nototheniidae; chromosomal rearrangements; species radiation; retrotransposons; FISH; DIRS1; insertion hot spots Nototheniidae; chromosomal rearrangements; species radiation; retrotransposons; FISH; DIRS1; insertion hot spots
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MDPI and ACS Style

Auvinet, J.; Graça, P.; Ghigliotti, L.; Pisano, E.; Dettaï, A.; Ozouf-Costaz, C.; Higuet, D. Insertion Hot Spots of DIRS1 Retrotransposon and Chromosomal Diversifications among the Antarctic Teleosts Nototheniidae. Int. J. Mol. Sci. 2019, 20, 701. https://doi.org/10.3390/ijms20030701

AMA Style

Auvinet J, Graça P, Ghigliotti L, Pisano E, Dettaï A, Ozouf-Costaz C, Higuet D. Insertion Hot Spots of DIRS1 Retrotransposon and Chromosomal Diversifications among the Antarctic Teleosts Nototheniidae. International Journal of Molecular Sciences. 2019; 20(3):701. https://doi.org/10.3390/ijms20030701

Chicago/Turabian Style

Auvinet, Juliette, Paula Graça, Laura Ghigliotti, Eva Pisano, Agnès Dettaï, Catherine Ozouf-Costaz, and Dominique Higuet. 2019. "Insertion Hot Spots of DIRS1 Retrotransposon and Chromosomal Diversifications among the Antarctic Teleosts Nototheniidae" International Journal of Molecular Sciences 20, no. 3: 701. https://doi.org/10.3390/ijms20030701

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