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Viral origin of eukaryotic type IIA DNA topoisomerases

Archive ouverte | Guglielmini, Julien | CCSD

International audience. Type II DNA topoisomerases of the family A (Topo IIAs) are present in all Bacteria (DNA gyrase) and eukaryotes. In eukaryotes, they play a major role in transcription, DNA replication, chromo...

Engineered bacterium fuels evolution debate

Archive ouverte | Forterre, Patrick | CCSD

International audience. Comment on the intense debate over the origin of eukaryotes is being fuelled by the lipids in the cell membrane of an engineered bacterium (see Nature 569, 322–324; 2019).

Lokiarchaea are close relatives of Euryarchaeota, not bridging the gap between prokaryotes and eukaryotes

Archive ouverte | da Cunha, Violette | CCSD

International audience. The eocyte hypothesis, in which Eukarya emerged from within Archaea, has been boosted by the description of a new candidate archaeal phylum, “Lokiarchaeota”, from metagenomic data. Eukarya br...

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