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The tiny germline chromosomes of Paramecium aurelia have an exceptionally high recombination rate and are capped by a new class of Helitrons.

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Title: The tiny germline chromosomes of Paramecium aurelia have an exceptionally high recombination rate and are capped by a new class of Helitrons.
Authors: Arnaiz O; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France., Guérin F; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France., Couloux A; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Evry, Université Paris-Saclay, Evry, 91057, France., Miró-Pina C; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France., Pellerin G; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France., Nekrasova I; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France., Amselem J; Université Paris-Saclay, INRAE, URGI, Versailles, 78026, France.; Université Paris-Saclay, INRAE, BioinfOmics, URGI, Versailles, 78026, France., Aury JM; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Evry, Université Paris-Saclay, Evry, 91057, France., Bhullar S; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France., Frapporti A; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France., Lerat E; Universite Claude Bernard Lyon 1, LBBE, UMR 5558, CNRS, VAS, Villeurbanne, France., Luyten I; Université Paris-Saclay, INRAE, URGI, Versailles, 78026, France.; Université Paris-Saclay, INRAE, BioinfOmics, URGI, Versailles, 78026, France., Malinsky S; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France., Mathy N; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France., Potekhin A; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France., Régnier V; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France.; Université Paris Cité, UFR Sciences du Vivant, Paris Cedex 13, 75205, France., Sawka-Gądek N; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France.; Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, Kraków, 31-016, Poland., Touzeau A; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France., de Vanssay A; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France., Zangarelli C; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France., Quesneville H; Université Paris-Saclay, INRAE, URGI, Versailles, 78026, France.; Université Paris-Saclay, INRAE, BioinfOmics, URGI, Versailles, 78026, France., Bétermier M; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France., Labadie K; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Evry, Université Paris-Saclay, Evry, 91057, France., Duret L; Universite Claude Bernard Lyon 1, LBBE, UMR 5558, CNRS, VAS, Villeurbanne, France., Meyer E; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France. emeyer@biologie.ens.fr., Duharcourt S; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France. sandra.duharcourt@ijm.fr., Sperling L; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France. linda.sperling@i2bc.paris-saclay.fr.
Source: BMC biology [BMC Biol] 2026 Apr 16; Vol. 24 (1). Date of Electronic Publication: 2026 Apr 16.
Publication Type: Journal Article
Journal Info: Publisher: BioMed Central Country of Publication: England NLM ID: 101190720 Publication Model: Electronic Cited Medium: Internet ISSN: 1741-7007 (Electronic) Linking ISSN: 17417007 NLM ISO Abbreviation: BMC Biol Subsets: MEDLINE
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  Data: The tiny germline chromosomes of Paramecium aurelia have an exceptionally high recombination rate and are capped by a new class of Helitrons.
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  Data: <searchLink fieldCode="AU" term="%22Arnaiz+O%22">Arnaiz O</searchLink>; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France.<br /><searchLink fieldCode="AU" term="%22Guérin+F%22">Guérin F</searchLink>; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France.<br /><searchLink fieldCode="AU" term="%22Couloux+A%22">Couloux A</searchLink>; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Evry, Université Paris-Saclay, Evry, 91057, France.<br /><searchLink fieldCode="AU" term="%22Miró-Pina+C%22">Miró-Pina C</searchLink>; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France.<br /><searchLink fieldCode="AU" term="%22Pellerin+G%22">Pellerin G</searchLink>; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France.<br /><searchLink fieldCode="AU" term="%22Nekrasova+I%22">Nekrasova I</searchLink>; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France.<br /><searchLink fieldCode="AU" term="%22Amselem+J%22">Amselem J</searchLink>; Université Paris-Saclay, INRAE, URGI, Versailles, 78026, France.; Université Paris-Saclay, INRAE, BioinfOmics, URGI, Versailles, 78026, France.<br /><searchLink fieldCode="AU" term="%22Aury+JM%22">Aury JM</searchLink>; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Evry, Université Paris-Saclay, Evry, 91057, France.<br /><searchLink fieldCode="AU" term="%22Bhullar+S%22">Bhullar S</searchLink>; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France.<br /><searchLink fieldCode="AU" term="%22Frapporti+A%22">Frapporti A</searchLink>; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France.<br /><searchLink fieldCode="AU" term="%22Lerat+E%22">Lerat E</searchLink>; 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Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France.; Université Paris Cité, UFR Sciences du Vivant, Paris Cedex 13, 75205, France.<br /><searchLink fieldCode="AU" term="%22Sawka-Gądek+N%22">Sawka-Gądek N</searchLink>; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France.; Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, Kraków, 31-016, Poland.<br /><searchLink fieldCode="AU" term="%22Touzeau+A%22">Touzeau A</searchLink>; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France.<br /><searchLink fieldCode="AU" term="%22de+Vanssay+A%22">de Vanssay A</searchLink>; Université Paris Cité, CNRS, Institut Jacques Monod, Paris, F-75013, France.<br /><searchLink fieldCode="AU" term="%22Zangarelli+C%22">Zangarelli C</searchLink>; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France.<br /><searchLink fieldCode="AU" term="%22Quesneville+H%22">Quesneville H</searchLink>; Université Paris-Saclay, INRAE, URGI, Versailles, 78026, France.; Université Paris-Saclay, INRAE, BioinfOmics, URGI, Versailles, 78026, France.<br /><searchLink fieldCode="AU" term="%22Bétermier+M%22">Bétermier M</searchLink>; Université Paris-Saclay, CEA, CNRS - Institute for Integrative Biology of the Cell (I2BC), Gif-Sur-Yvette, France.<br /><searchLink fieldCode="AU" term="%22Labadie+K%22">Labadie K</searchLink>; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université Evry, Université Paris-Saclay, Evry, 91057, France.<br /><searchLink fieldCode="AU" term="%22Duret+L%22">Duret L</searchLink>; Universite Claude Bernard Lyon 1, LBBE, UMR 5558, CNRS, VAS, Villeurbanne, France.<br /><searchLink fieldCode="AU" term="%22Meyer+E%22">Meyer E</searchLink>; Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, 75005, France. emeyer@biologie.ens.fr.<br /><searchLink fieldCode="AU" term="%22Duharcourt+S%22">Duharcourt S</searchLink>; 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