Origin of rickettsial host dependency unravelled – Nature.com

Origin of rickettsial host dependency unravelled – Nature.com

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BACTERIAL EVOLUTION
Nature Microbiology (2022)
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Phylogeny estimation of newly discovered aquatic copiotrophic Rickettsiales indicates evolution of host dependency from extracellular species and the origin of mitochondria from an unknown proteobacterial lineage.
The evolutionary origins of obligate host association of bacterial symbionts are often difficult to ascertain and controversial. In particular, the ancient endosymbiosis that led to formation of mitochondria and the rise of eukaryotes is fraught with contention. Writing in Nature Microbiology, Schön et al.1 uncover and analyse aquatic alphaproteobacterial metagenome-assembled genomes (MAGs) corresponding to previously undescribed Rickettsiales clades, providing insights into how rickettsial host association emerged and evolved independent of the mitochondrial ancestor.
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Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
Victoria I. Verhoeve & Joseph J. Gillespie
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Correspondence to Joseph J. Gillespie.
The authors declare no competing interests.
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Verhoeve, V.I., Gillespie, J.J. Origin of rickettsial host dependency unravelled. Nat Microbiol (2022). https://doi.org/10.1038/s41564-022-01187-9
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Published: 02 August 2022
DOI: https://doi.org/10.1038/s41564-022-01187-9
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