Cited by 1,216Genomics and Phylogenetic StudiesMicrobial Community Ecology and PhysiologyBacterial Genetics and Biotechnology

Unusual biology across a group comprising more than 15% of domain Bacteria

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Brown, Christopher T., Hug, Laura A., Thomas, Brian C., Sharon, Itai, Castelle, Cindy J., Singh, Andrea, Wilkins, Michael J., Wrighton, Kelly C. +2 more·2015·Nature

Abstract

A prominent feature of the bacterial domain is a radiation of major lineages that are defined as candidate phyla because they lack isolated representatives. Bacteria from these phyla occur in diverse environments and are thought to mediate carbon and hydrogen cycles. Genomic analyses of a few representatives suggested that metabolic limitations have prevented their cultivation. Here we reconstructed 8 complete and 789 draft genomes from bacteria representing >35 phyla and documented features that consistently distinguish these organisms from other bacteria. We infer that this group, which may comprise >15% of the bacterial domain, has shared evolutionary history, and describe it as the candidate phyla radiation (CPR). All CPR genomes are small and most lack numerous biosynthetic pathways. Owing to divergent 16S ribosomal RNA (rRNA) gene sequences, 50-100% of organisms sampled from specific phyla would evade detection in typical cultivation-independent surveys. CPR organisms often have self-splicing introns and proteins encoded within their rRNA genes, a feature rarely reported in bacteria. Furthermore, they have unusual ribosome compositions. All are missing a ribosomal protein often absent in symbionts, and specific lineages are missing ribosomal proteins and biogenesis factors considered universal in bacteria. This implies different ribosome structures and biogenesis mechanisms, and underlines unusual biology across a large part of the bacterial domain.

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Crossref · 10.1038/nature14486

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  • The bacterial candidate phyla radiation (CPR) and the DPANN archaea diversify near the base of the Bacteria and Archaea respectively.

    “Trees visualized at https://itol.embl.de/itol.cgiusing Netwick files from Hug et al. (2016) concatenated ribosomal proteins in place of 16S rRNA genes (Fig. 3B) indicate that a large radiation of predominantly uncultured mesophilic taxa, which are comprised of potentially symbiotic organisms with small cells and genomes and are referred to as the bacterial candidate phyla radiation (CPR) and the”

    From The Emergence of Life (2019) · cites this paper as Brown et al. 2015

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Authors
Brown, C. T., Hug, L. A., Thomas, B. C., Sharon, I., Castelle, C. J., Singh, A., Wilkins, M. J., Wrighton, K. C., Williams, K. H., & Banfield, J. F.
Affiliations
  • University of California, Berkeley (US)
  • The Ohio State University (US)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
Banfield, Jillian F.
Venue
Nature
Published
2015-06-15
Volume
523
Issue
7559
Pages
208-211
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1528357204
Cited by
1,216
References
63
Citations by year
2026: 56 · 2025: 100 · 2024: 95 · 2023: 125 · 2022: 108 · 2021: 120 · 2020: 144 · 2019: 121 · 2018: 116 · 2017: 104 · 2016: 101 · 2015: 26
FWCI
50.17
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • U.S. Department of Energy (DESC0004918, DE AC02 05CH11231)
  • Joint Genome Institute
  • Office of Science
  • Biological and Environmental Research
  • Pacific Northwest National Laboratory
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
Keywords
Candidate Phyla Radiation, uncultured bacteria, bacterial evolution, ribosome composition, ribosome biogenesis, self-splicing introns, small genomes, groundwater bacteria, metagenome-assembled genomes, symbionts
MeSH terms
Bacteria, Environmental Microbiology, Introns, Phylogeny, Ribosomal Proteins, RNA, Ribosomal, 16S, Genome, Bacterial

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