An Interactive Annotated World Bibliography of Printed and Digital Works in the History of Medicine and the Life Sciences from Circa 2000 BCE to 2022 by Fielding H. Garrison (1870-1935), Leslie T. Morton (1907-2004), and Jeremy M. Norman (1945- ) Traditionally Known as “Garrison-Morton”

15959 entries, 13943 authors and 1935 subjects. Updated: March 1, 2024

IMACHI, Hiroyuki

1 entries
  • 12302

Isolation of an archeon at the prokaryote eukaryote interface.

Nature, 577, 519-525, 2020.

(Order of authorship in the original publication: Imachi, Nobu, Nakahara...Takai.) The authors report that after 12 years of research they have cultured a microorganism that may be the transitional species between prokaryotes and eukaryotes. The organism, obtained from deep ocean sediments, they named Prometheoarchaeum syntrophicum. It has a large number of genes that encode eukaryotic signature proteins only found in eurkaryotes. This bacterium has long tentacle-like protrusions emanating from its surface, and its metabolism characteristics prompted the authors to propose a new model for the emergence of the first eukaryotic cell. Instead of the classic phagocytosis concept of one cell eating another, the authors proposed that this host archaeon connected to the metabolic partner using the newly discovered tentacular extracellular structures and simultaneously formed a primitive chromosome surrounding structure that is topologically similar to the nuclear membrane.

"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 E3) model." (From the abstract.)

(Thanks to Juan Weiss for this reference and its interpretation.)

Open source from at this link.

Subjects: BIOLOGY › Cell Biology, BIOLOGY › TAXONOMY › Classification of Cellular Life, MICROBIOLOGY