Eukaryotes appearing

Shin Ichi Yokobori*, Ryutaro Furukawa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


The appearance of eukaryotic cells was a major step in the evolution of terrestrial life. Recent phylogenetic analyses indicate that the Eukaryotes appeared from the Archaebacteria rather than being a distinct domain from Archaebacteria and Eubacteria. The Asgard archaeal group, which shares genes that are otherwise unique to Eukaryotes, has been suggested to be the closest relative to Eukaryotes. However, eukaryotic genes have also been shown to have originated from diverse groups in the Archaebacteria and Eubacteria. Asgard archaeon-like Archaea (Archaebacteria) may have been the host for endosymbiosis of the mitochondrial ancestor (Alphaproteobacteria) and might have been the ancestor of Eukaryotes; nevertheless, horizontal gene transfer from various lineages of Archaebacteria and Eubacteria also appear to have played an important role in the evolution of Eukaryotes.

Original languageEnglish
Title of host publicationAstrobiology
Subtitle of host publicationFrom the Origins of Life to the Search for Extraterrestrial Intelligence
PublisherSpringer Singapore
Number of pages17
ISBN (Electronic)9789811336393
ISBN (Print)9789811336386
Publication statusPublished - 2019 Jan 1
Externally publishedYes


  • Asgard group
  • Horizontal gene transfer
  • Mitochondria

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Physics and Astronomy(all)
  • Immunology and Microbiology(all)
  • Earth and Planetary Sciences(all)


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