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TitleIsolation of an archaeon at the prokaryote-eukaryote interface.
Journal, issue, pagesNature, Vol. 577, Issue 7791, Page 519-525, Year 2020
Publish dateJan 15, 2020
AuthorsHiroyuki Imachi / Masaru K Nobu / Nozomi Nakahara / Yuki Morono / Miyuki Ogawara / Yoshihiro Takaki / Yoshinori Takano / Katsuyuki Uematsu / Tetsuro Ikuta / Motoo Ito / Yohei Matsui / Masayuki Miyazaki / Kazuyoshi Murata / Yumi Saito / Sanae Sakai / Chihong Song / Eiji Tasumi / Yuko Yamanaka / Takashi Yamaguchi / Yoichi Kamagata / Hideyuki Tamaki / Ken Takai /
PubMed AbstractThe origin of eukaryotes remains unclear. Current data suggest that eukaryotes may have emerged from an archaeal lineage known as 'Asgard' archaea. Despite the eukaryote-like genomic features that ...The origin of eukaryotes remains unclear. Current data suggest that eukaryotes may have emerged from an archaeal lineage known as 'Asgard' archaea. Despite the eukaryote-like genomic features that are found in these archaea, the evolutionary transition from archaea to eukaryotes remains unclear, owing to the lack of cultured representatives and corresponding physiological insights. Here we report the decade-long isolation of an Asgard archaeon related to Lokiarchaeota from deep marine sediment. The archaeon-'Candidatus Prometheoarchaeum syntrophicum' strain MK-D1-is an anaerobic, extremely slow-growing, small coccus (around 550 nm in diameter) that degrades amino acids through syntrophy. Although eukaryote-like intracellular complexes have been proposed for Asgard archaea, the isolate has no visible organelle-like structure. Instead, Ca. P. syntrophicum is morphologically complex and has unique protrusions that are long and often branching. On the basis of the available data obtained from cultivation and genomics, and reasoned interpretations of the existing literature, we propose a hypothetical model for eukaryogenesis, termed the entangle-engulf-endogenize (also known as E) model.
External linksNature / PubMed:31942073 / PubMed Central
MethodsEM (tomography)
Structure data

EMDB-0809:
Cryo-electron tomography of Candidatus Prometheoarchaeum syntrophicum strain MK-D1
Method: EM (tomography)

EMDB-0852:
Cryo-electron tomography of Candidatus Prometheoarchaeum syntrophicum strain MK-D1
Method: EM (tomography)

Source
  • anaerobic archaeon MK-D1 (archaea)

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