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

Journal Article · · Nature (London)
DOI:https://doi.org/10.1038/nature14486· OSTI ID:1512215
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3];  [4]
  1. Univ. of California, Berkeley, CA (United States)
  2. The Ohio State Univ., Columbus, OH (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
All rights reserved. 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.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1512215
Journal Information:
Nature (London), Journal Name: Nature (London) Journal Issue: 7559 Vol. 523; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Uncovering the Uncultivated Majority in Antarctic Soils: Toward a Synergistic Approach journal February 2019
The Water Microbiome Through a Pilot Scale Advanced Treatment Facility for Direct Potable Reuse journal May 2019
Putative Mixotrophic Nitrifying-Denitrifying Gammaproteobacteria Implicated in Nitrogen Cycling Within the Ammonia/Oxygen Transition Zone of an Oil Sands Pit Lake journal October 2019
FeGenie: A Comprehensive Tool for the Identification of Iron Genes and Iron Gene Neighborhoods in Genome and Metagenome Assemblies journal January 2020
Acetate Activates Deep Subsurface Fracture Fluid Microbial Communities in Olkiluoto, Finland journal November 2018
Bioinformatic Analysis Reveals Archaeal tRNATyr and tRNATrp Identities in Bacteria journal February 2017
Specificities and Efficiencies of Primers Targeting Candidatus Phylum Saccharibacteria in Activated Sludge journal July 2018
Ideas and perspectives: Strengthening the biogeosciences in environmental research networks journal January 2018
Metabolic network percolation quantifies biosynthetic capabilities across the human oral microbiome journal June 2019
Microfluidic-based mini-metagenomics enables discovery of novel microbial lineages from complex environmental samples journal July 2017
Single-amino acid variants reveal evolutionary processes that shape the biogeography of a global SAR11 subclade journal September 2019
Identifying contamination with advanced visualization and analysis practices: metagenomic approaches for eukaryotic genome assemblies journal January 2016
Metagenomic identification of active methanogens and methanotrophs in serpentinite springs of the Voltri Massif, Italy journal January 2017

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