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Ancient Adaptive Lateral Gene Transfers in the Symbiotic Opalina - Blastocystis Stramenopile Lineage

Abstract : Lateral gene transfer (LGT) is a very common process in bacterial and archaeal evolution, playing an important role in the adaptation to new environments. In eukaryotes, its role and frequency remain highly debated, although recent research supports that gene transfer from bacteria to diverse eukaryotes may be much more common than previously appreciated. However, most of this research focused on animals and the true phylogenetic and functional impact of bacterial genes in less-studied microbial eukaryotic groups remains largely unknown. Here, we have analyzed transcriptome data from the deep-branching stramenopile Opalinidae, common members of frog gut microbiomes and distantly related to the well-known genus Blastocystis. Phylogenetic analyses suggest the early acquisition of several bacterial genes in a common ancestor of both lineages. Those LGTs most likely facilitated the adaptation of the free-living ancestor of the Opalinidae-Blastocystis symbiotic group to new niches in the oxygen-depleted animal gut environment.
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https://hal.archives-ouvertes.fr/hal-02367918
Contributor : David Moreira Fernandez <>
Submitted on : Monday, November 18, 2019 - 11:40:56 AM
Last modification on : Thursday, December 10, 2020 - 5:10:07 PM

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Naoji Yubuki, Luis Xavier Galindo, Guillaume Reboul, Purificacion Lopez-Garcia, Matthew Brown, et al.. Ancient Adaptive Lateral Gene Transfers in the Symbiotic Opalina - Blastocystis Stramenopile Lineage. Molecular Biology and Evolution, Oxford University Press (OUP), 2019, 37, pp.651-659. ⟨10.1093/molbev/msz250⟩. ⟨hal-02367918⟩

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