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Title: A Complex Endomembrane System in the Archaeon Ignicoccus hospitalis Tapped by Nanoarchaeum equitans

Journal Article · · Frontiers in Microbiology
 [1];  [2];  [2];  [3];  [3];  [4];  [2];  [5];  [6];  [6];  [7];  [7];  [8];  [8];  [3]
  1. Philipps Univ. of Marburg (Germany). LOEWE Research Center for Synthetic Microbiology (SYNMIKRO)
  2. Ludwig Maximilian Univ., Munich (Germany). Biocenter LMU. Plant Development and Electron Microscopy
  3. Univ. of Regensburg (Germany). Center for Electron Microscopy
  4. Univ. of Regensburg (Germany). Inst. of Experimental and Applied Physics
  5. Univ. of Bayreuth (Germany). Cell Biology and Electron Microscopy
  6. Indiana Univ., Bloomington, IN (United States). Molecular and Cellular Biochemistry Dept.
  7. Univ. of Regensburg (Germany). Microbiology Dept.
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division; Univ. of Tennessee, Knoxville, TN (United States). Microbiology Dept.

Based on serial sectioning, focused ion beam scanning electron microscopy (FIB/SEM), and electron tomography, we depict in detail the highly unusual anatomy of the marine hyperthermophilic crenarchaeon, Ignicoccus hospitalis. Our data support a complex and dynamic endomembrane system consisting of cytoplasmic protrusions, and with secretory function. Moreover, we reveal that the cytoplasm of the putative archaeal ectoparasite Nanoarchaeum equitans can get in direct contact with this endomembrane system, complementing and explaining recent proteomic, transcriptomic and metabolomic data on this inter-archaeal relationship. In addition, we identified a matrix of filamentous structures and/or tethers in the voluminous inter-membrane compartment (IMC) of I. hospitalis, which might be responsible for membrane dynamics. Overall, this unusual cellular compartmentalization, ultrastructure and dynamics in an archaeon that belongs to the recently proposed TACK superphylum prompts speculation that the eukaryotic endomembrane system might originate from Archaea.

Research Organization:
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Philipps Univ. of Marburg (Germany); Univ. of Regensburg (Germany)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); German Research Foundation (DFG); Wellcome Trust (United Kingdom)
Contributing Organization:
Ludwig Maximilian Univ., Munich (Germany); Univ. of Bayreuth (Germany); Indiana Univ., Bloomington, IN (United States)
Grant/Contract Number:
SC0006654; DEB-1134877; HU 703/2; 086045/Z/08/Z
OSTI ID:
1364327
Journal Information:
Frontiers in Microbiology, Vol. 8; ISSN 1664-302X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Two or three domains: a new view of tree of life in the genomics era journal February 2018
An archaeal symbiont-host association from the deep terrestrial subsurface journal May 2019
Targeted isolation and cultivation of uncultivated bacteria by reverse genomics journal September 2019
Unexpected host dependency of Antarctic Nanohaloarchaeota journal June 2019
Genomic diversity, lifestyles and evolutionary origins of DPANN archaea journal January 2019
Extracellular membrane vesicles in the three domains of life and beyond journal November 2018
FIB-SEM imaging properties of Drosophila melanogaster tissues embedded in Lowicryl HM20: FIB-SEM OF DROSOPHILA TISSUES journal November 2018
Single-cell genomics of co-sorted Nanoarchaeota suggests novel putative host associations and diversification of proteins involved in symbiosis journal September 2018