Horizontal gene flow from Eubacteria to Archaebacteria and what it means for our understanding of eukaryogenesis

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
Wasiu A AkanniDavide Pisani

Abstract

The origin of the eukaryotic cell is considered one of the major evolutionary transitions in the history of life. Current evidence strongly supports a scenario of eukaryotic origin in which two prokaryotes, an archaebacterial host and an α-proteobacterium (the free-living ancestor of the mitochondrion), entered a stable symbiotic relationship. The establishment of this relationship was associated with a process of chimerization, whereby a large number of genes from the α-proteobacterial symbiont were transferred to the host nucleus. A general framework allowing the conceptualization of eukaryogenesis from a genomic perspective has long been lacking. Recent studies suggest that the origins of several archaebacterial phyla were coincident with massive imports of eubacterial genes. Although this does not indicate that these phyla originated through the same process that led to the origin of Eukaryota, it suggests that Archaebacteria might have had a general propensity to integrate into their genomes large amounts of eubacterial DNA. We suggest that this propensity provides a framework in which eukaryogenesis can be understood and studied in the light of archaebacterial ecology. We applied a recently developed supertree method to a...Continue Reading

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Citations

Sep 2, 2015·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Tom A Williams, T Martin Embley
Sep 2, 2015·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·James McInerneyMary J O'Connell
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May 24, 2017·Proceedings of the National Academy of Sciences of the United States of America·Tom A WilliamsT Martin Embley
Jul 3, 2021·Scientific Reports·David KerkGreg B Moorhead

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