Ancestral Absence of Electron Transport Chains in Patescibacteria and DPANN.
Archaea
Bacteria
evolution
genomics fermentation
oxidoreductases
respiration
Journal
Frontiers in microbiology
ISSN: 1664-302X
Titre abrégé: Front Microbiol
Pays: Switzerland
ID NLM: 101548977
Informations de publication
Date de publication:
2020
2020
Historique:
received:
02
04
2020
accepted:
15
07
2020
entrez:
5
10
2020
pubmed:
6
10
2020
medline:
6
10
2020
Statut:
epublish
Résumé
Recent discoveries suggest that the candidate superphyla Patescibacteria and DPANN constitute a large fraction of the phylogenetic diversity of Bacteria and Archaea. Their small genomes and limited coding potential have been hypothesized to be ancestral adaptations to obligate symbiotic lifestyles. To test this hypothesis, we performed cell-cell association, genomic, and phylogenetic analyses on 4,829 individual cells of Bacteria and Archaea from 46 globally distributed surface and subsurface field samples. This confirmed the ubiquity and abundance of Patescibacteria and DPANN in subsurface environments, the small size of their genomes and cells, and the divergence of their gene content from other Bacteria and Archaea. Our analyses suggest that most Patescibacteria and DPANN in the studied subsurface environments do not form specific physical associations with other microorganisms. These data also suggest that their unusual genomic features and prevalent auxotrophies may be a result of ancestral, minimal cellular energy transduction mechanisms that lack respiration, thus relying solely on fermentation for energy conservation.
Identifiants
pubmed: 33013724
doi: 10.3389/fmicb.2020.01848
pmc: PMC7507113
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1848Informations de copyright
Copyright © 2020 Beam, Becraft, Brown, Schulz, Jarett, Bezuidt, Poulton, Clark, Dunfield, Ravin, Spear, Hedlund, Kormas, Sievert, Elshahed, Barton, Stott, Eisen, Moser, Onstott, Woyke and Stepanauskas.
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