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-Structure paper
タイトル | Isolation of an archaeon at the prokaryote-eukaryote interface. |
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ジャーナル・号・ページ | Nature, Vol. 577, Issue 7791, Page 519-525, Year 2020 |
掲載日 | 2020年1月15日 |
著者 | Hiroyuki 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 要旨 | 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 ...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. |
リンク | Nature / PubMed:31942073 / PubMed Central |
手法 | EM (トモグラフィー) |
構造データ | EMDB-0809: EMDB-0852: |
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