Evidence map›Paper›PMID 33495623›Full record

ArticleNature microbiology2021

Genome-resolved metagenomics reveals site-specific diversity of episymbiotic CPR bacteria and DPANN archaea in groundwater ecosystems.

Christine He, Ray Keren, Michael L Whittaker, Ibrahim F Farag, Jennifer A Doudna, Jamie H D Cate, Jillian F Banfield

Abstract read
In one paragraph

Article in Nature microbiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 136 papers.

0numbers the graph read from it
0cells of the map it votes in
136citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

136 citing papers in PubMed.

  1. Microbial ecology of shallow groundwater ecosystems.Nature reviews. Microbiology · 2026
    Review
  2. Review
  3. Magnetotaxis in an anaerobic ciliate via tripartite syntrophy.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  4. Article
  5. Article
  6. A Novel Pilus System in Candidate Phyla Radiation Bacteria.bioRxiv : the preprint server for biology · 2026
    Article
  7. Divergent evolution of the PRPS enzymes across the tree of life.bioRxiv : the preprint server for biology · 2026
    Article
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  18. Review
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76 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Christine HeInnovative Genomics Institute, University of California, Berkeley, CA, USA.ORCID http://orcid.org/0000-0002-7119-5509
Ray KerenDepartment of Civil and Environmental Engineering, University of California, Berkeley, CA, USA.ORCID http://orcid.org/0000-0002-4887-9232
Michael L WhittakerEnergy Geoscience Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Ibrahim F FaragInnovative Genomics Institute, University of California, Berkeley, CA, USA.ORCID http://orcid.org/0000-0002-5732-4108
Jennifer A DoudnaInnovative Genomics Institute, University of California, Berkeley, CA, USA.ORCID http://orcid.org/0000-0001-9161-999X
Jamie H D CateInnovative Genomics Institute, University of California, Berkeley, CA, USA.ORCID http://orcid.org/0000-0001-5965-7902
Jillian F BanfieldInnovative Genomics Institute, University of California, Berkeley, CA, USA. jbanfield@berkeley.edu.ORCID http://orcid.org/0000-0001-8203-8771

Funding

Howard Hughes Medical Institute
6 · The paper itself

Abstract

Candidate phyla radiation (CPR) bacteria and DPANN archaea are unisolated, small-celled symbionts that are often detected in groundwater. The effects of groundwater geochemistry on the abundance, distribution, taxonomic diversity and host association of CPR bacteria and DPANN archaea has not been studied. Here, we performed genome-resolved metagenomic analysis of one agricultural and seven pristine groundwater microbial communities and recovered 746 CPR and DPANN genomes in total. The pristine sites, which serve as local sources of drinking water, contained up to 31% CPR bacteria and 4% DPANN archaea. We observed little species-level overlap of metagenome-assembled genomes (MAGs) across the groundwater sites, indicating that CPR and DPANN communities may be differentiated according to physicochemical conditions and host populations. Cryogenic transmission electron microscopy imaging and genomic analyses enabled us to identify CPR and DPANN lineages that reproducibly attach to host cells and showed that the growth of CPR bacteria seems to be stimulated by attachment to host-cell surfaces. Our analysis reveals site-specific diversity of CPR bacteria and DPANN archaea that coexist with diverse hosts in groundwater aquifers. Given that CPR and DPANN organisms have been identified in human microbiomes and their presence is correlated with diseases such as periodontitis, our findings are relevant to considerations of drinking water quality and human health.

Indexed as

Bacterial Physiological PhenomenaEcosystemAgricultureArchaeaBacteriaCell AdhesionCell ProliferationGroundwaterHumansMetagenomeMetagenomicsMicrobiotaPhylogenySymbiosis

Identifiers

PMID33495623
PMCPMC7906910

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.