Promethearchaeota

Promethearchaeota
SEM image of Prometheoarchaeum syntrophicum
Scientific classification
Domain: Archaea
Kingdom: Promethearchaeati
Phylum:
Imachi et al., 2024
Class:
Imachi et al., 2024
Order:
Imachi et al., 2024
Family:
Imachi et al., 2024
Genera[1]
Synonyms
  • "Ca. Lokiarchaeota" corrig. Spang et al., 2015

Promethearchaeota,[2] previously called "Candidatus Lokiarchaeota"[3] is a phylum of the kingdom Promethearchaeati, the kingdom from which the eukaryotes emerged.[4] The phylum has one class: Promethearchaeia. The phylum includes all members of the group previously named Deep Sea Archaeal Group, also known as Marine Benthic Group B. A phylogenetic analysis disclosed a monophyletic grouping of the Promethearchaeota with the eukaryotes. The analysis revealed several genes with cell membrane-related functions. The presence of such genes support the hypothesis of an archaeal host for the emergence of the eukaryotes; the eocyte-like scenarios.

Promethearchaeota was introduced in 2015 after the identification of a candidate genome in a metagenomic analysis of a mid-oceanic sediment sample. This analysis suggests the existence of a genus of unicellular life dubbed "Candidatus Lokiarchaeum". The sample was taken near a hydrothermal vent at a vent field known as Loki's Castle located at the bend between Mohns/Knipovich ridge in the Arctic Ocean.[5]

  1. ^ taxonomy. "Taxonomy browser (Promethearchaeaceae)". www.ncbi.nlm.nih.gov. Retrieved 2025-07-17.
  2. ^ Parte, Aidan C.; Sardà Carbasse, Joaquim; Meier-Kolthoff, Jan P.; Reimer, Lorenz C.; Göker, Markus (2020-11-01). "List of Prokaryotic names with Standing in Nomenclature (LPSN) moves to the DSMZ". International Journal of Systematic and Evolutionary Microbiology. 70 (11): 5607–5612. doi:10.1099/ijsem.0.004332. ISSN 1466-5026. PMC 7723251. PMID 32701423.
  3. ^ Rodrigues-Oliveira, Thiago; Wollweber, Florian; Ponce-Toledo, Rafael I.; Xu, Jingwei; Rittmann, Simon K.-M. R.; Klingl, Andreas; Pilhofer, Martin; Schleper, Christa (2023-01-12). "Actin cytoskeleton and complex cell architecture in an Asgard archaeon" (PDF). Nature. 613 (7943): 332–339. Bibcode:2023Natur.613..332R. doi:10.1038/s41586-022-05550-y. ISSN 0028-0836. OCLC 9736627437. PMC 9834061. PMID 36544020. Retrieved 2025-07-21.
  4. ^ Lambert, Jonathan (9 August 2019). "Scientists glimpse oddball microbe that could help explain rise of complex life - 'Lokiarchaea', previously known only from DNA, is isolated and grown in culture". Nature. 572 (7769): 294. Bibcode:2019Natur.572..294L. doi:10.1038/d41586-019-02430-w. PMID 31409927.
  5. ^ Spang, Anja; Saw, Jimmy H.; Jørgensen, Steffen L.; Zaremba-Niedzwiedzka, Katarzyna; Martijn, Joran; Lind, Anders E.; van Eijk, Roel; Schleper, Christa; Guy, Lionel; Ettema, Thijs J. G. (2015). "Complex archaea that bridge the gap between prokaryotes and eukaryotes". Nature. 521 (7551): 173–179. Bibcode:2015Natur.521..173S. doi:10.1038/nature14447. ISSN 0028-0836. PMC 4444528. PMID 25945739.
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