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Exploring microbial dark matter to resolve the deep archaeal ancestry of eukaryotes

Journal Article · · Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [5];  [6];  [2];  [2]
  1. Uppsala Univ., Uppsala (Sweden); DOE Office of Scientific and Technical Information (OSTI)
  2. Uppsala Univ., Uppsala (Sweden)
  3. Univ. of Nevada, Las Vegas, NV (United States); California State Univ. (CalState), San Bernardino, CA (United States)
  4. Univ. of Nevada, Las Vegas, NV (United States)
  5. Univ. of New Mexico, Albuquerque, NM (United States)
  6. Univ. of Nevada, Las Vegas, NV (United States). School of Life Sciences
The origin of eukaryotes represents an enigmatic puzzle, which is still lacking a number of essential pieces. Whereas it is currently accepted that the process of eukaryogenesis involved an interplay between a host cell and an alphaproteobacterial endosymbiont, we currently lack detailed information regarding the identity and nature of these players. A number of studies have provided increasing support for the emergence of the eukaryotic host cell from within the archaeal domain of life, displaying a specific affiliation with the archaeal TACK superphylum. Recent studies have shown that genomic exploration of yet-uncultivated archaea, the so-called archaeal 'dark matter', is able to provide unprecedented insights into the process of eukaryogenesis. Here, we provide an overview of state-of-the-art cultivation-independent approaches, and demonstrate how these methods were used to obtain draft genome sequences of several novel members of the TACK superphylum, including Lokiarchaeum, two representatives of the Miscellaneous Crenarchaeotal Group (Bathyarchaeota), and a Korarchaeum-related lineage. In conclusion, the maturation of cultivation-independent genomics approaches, as well as future developments in next-generation sequencing technologies, will revolutionize our current view of microbial evolution and diversity, and provide profound new insights into the early evolution of life, including the enigmatic origin of the eukaryotic cell.
Research Organization:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Organization:
ERC; EU; Marie Curie; NASA; NSF; Swedish Research Council; USDOE
Grant/Contract Number:
EE0000716; SC0006771
OSTI ID:
1343570
Journal Information:
Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences, Journal Name: Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences Journal Issue: 1678 Vol. 370; ISSN 0962-8436
Publisher:
The Royal Society PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (21)

Accessing the genomic information of unculturable oceanic picoeukaryotes by combining multiple single cells journal January 2017
RNA-Dependent Cysteine Biosynthesis in Bacteria and Archaea journal May 2017
Multiple levels of the unknown in microbiome research journal June 2019
Data from: Exploring microbial dark matter to resolve the deep archaeal ancestry of eukaryotes dataset December 2015
Metagenomic approaches: effective tools for monitoring the structure and functionality of microbiomes in anaerobic digestion systems journal November 2019
Genotyping of Bartonella bacteria and their animal hosts: current status and perspectives journal August 2017
Asgard archaea illuminate the origin of eukaryotic cellular complexity journal January 2017
Archaea and the origin of eukaryotes journal November 2017
Genomes of two archaeal endosymbionts show convergent adaptations to an intracellular lifestyle journal July 2018
Building de novo reference genome assemblies of complex eukaryotic microorganisms from single nuclei journal January 2020
Energetics and population genetics at the root of eukaryotic cellular and genomic complexity journal December 2015
Integrative modeling of gene and genome evolution roots the archaeal tree of life journal May 2017
Genomic diversity, lifestyles and evolutionary origins of DPANN archaea journal January 2019
Microbial Dark Matter Investigations: How Microbial Studies Transform Biological Knowledge and Empirically Sketch a Logic of Scientific Discovery journal February 2018
Tracing the Archaeal Origins of Eukaryotic Membrane-Trafficking System Building Blocks journal February 2016
Changing ideas about eukaryotic origins journal September 2015
Assessing the viral content of uncultured picoeukaryotes in the global‐ocean by single cell genomics journal September 2019
The Physiology of Phagocytosis in the Context of Mitochondrial Origin journal June 2017
Birth of Archaeal Cells: Molecular Phylogenetic Analyses of G1P Dehydrogenase, G3P Dehydrogenases, and Glycerol Kinase Suggest Derived Features of Archaeal Membranes Having G1P Polar Lipids journal January 2016
Microbial Community Response to Simulated Petroleum Seepage in Caspian Sea Sediments journal April 2017
Cultivation and Genomic Analysis of “Candidatus Nitrosocaldus islandicus,” an Obligately Thermophilic, Ammonia-Oxidizing Thaumarchaeon from a Hot Spring Biofilm in Graendalur Valley, Iceland journal February 2018


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