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100 million years of multigene family evolution: origin and evolution of the avian MHC class IIB

J. Goebel, M. Promerová, F. Bonadonna, KD. McCoy, C. Serbielle, M. Strandh, G. Yannic, R. Burri, L. Fumagalli,

. 2017 ; 18 (1) : 460. [pub] 20170613

Language English Country Great Britain

Document type Journal Article, Research Support, Non-U.S. Gov't

Persistent link   https://www.medvik.cz/link/bmc18010494

BACKGROUND: Gene duplication has led to a most remarkable adaptation involved in vertebrates' host-pathogen arms-race, the major histocompatibility complex (MHC). However, MHC duplication history is as yet poorly understood in non-mammalian vertebrates, including birds. RESULTS: Here, we provide evidence for the evolution of two ancient avian MHC class IIB (MHCIIB) lineages by a duplication event prior to the radiation of all extant birds >100 million years ago, and document the role of concerted evolution in eroding the footprints of the avian MHCIIB duplication history. CONCLUSIONS: Our results suggest that eroded footprints of gene duplication histories may mimic birth-death evolution and that in the avian MHC the presence of the two lineages may have been masked by elevated rates of concerted evolution in several taxa. Through the presence of a range of intermediate evolutionary stages along the homogenizing process of concerted evolution, the avian MHCIIB provides a remarkable illustration of the erosion of multigene family duplication history.

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$a Goebel, Julien $u Laboratory for Conservation Biology, Department of Ecology and Evolution, University of Lausanne, Biophore Building, CH-1015, Lausanne, Switzerland.
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$a BACKGROUND: Gene duplication has led to a most remarkable adaptation involved in vertebrates' host-pathogen arms-race, the major histocompatibility complex (MHC). However, MHC duplication history is as yet poorly understood in non-mammalian vertebrates, including birds. RESULTS: Here, we provide evidence for the evolution of two ancient avian MHC class IIB (MHCIIB) lineages by a duplication event prior to the radiation of all extant birds >100 million years ago, and document the role of concerted evolution in eroding the footprints of the avian MHCIIB duplication history. CONCLUSIONS: Our results suggest that eroded footprints of gene duplication histories may mimic birth-death evolution and that in the avian MHC the presence of the two lineages may have been masked by elevated rates of concerted evolution in several taxa. Through the presence of a range of intermediate evolutionary stages along the homogenizing process of concerted evolution, the avian MHCIIB provides a remarkable illustration of the erosion of multigene family duplication history.
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$a Promerová, Marta $u Institute of Vertebrate Biology of the Czech Academy of Sciences, Kvetna 8, 60365, Brno, Czech Republic. Present address: Max Planck Institute for the Science of Human History, Kahlaische Strasse 10, D-07745, Jena, Germany.
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$a Bonadonna, Francesco $u CNRS, UMR 5175, Centre for Functional and Evolutionary Ecology, F-34293, Montpellier, France.
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$a McCoy, Karen D $u MIVEGEC UMR 5290 CNRS-IRD University of Montpellier, Centre IRD, F-34394, Montpellier, France.
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$a Serbielle, Céline $u MIVEGEC UMR 5290 CNRS-IRD University of Montpellier, Centre IRD, F-34394, Montpellier, France.
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$a Strandh, Maria $u CNRS, UMR 5175, Centre for Functional and Evolutionary Ecology, F-34293, Montpellier, France. Present address: Molecular Ecology and Evolution Lab, Department of Biology, Lund University, Sölvegatan 37, SE-223 62, Lund, Sweden.
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$a Yannic, Glenn $u LECA - Laboratoire d'Écologie Alpine, UMR CNRS 5553, Université Savoie Mont Blanc, F-73376, Le Bourget-du-Lac, France.
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$a Burri, Reto $u Department of Population Ecology, Institute of Ecology, Friedrich Schiller University Jena, Dornburger Strasse 159, D-07743, Jena, Germany. burri@wildlight.ch.
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$a Fumagalli, Luca $u Laboratory for Conservation Biology, Department of Ecology and Evolution, University of Lausanne, Biophore Building, CH-1015, Lausanne, Switzerland. luca.fumagalli@unil.ch.
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