Cited by 116Gut microbiota and healthGenomics and Phylogenetic StudiesGenetic diversity and population structure

Analysis of 1321 Eubacterium rectale genomes from metagenomes uncovers complex phylogeographic population structure and subspecies functional adaptations

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Karcher, Nicolai, Pasolli, Edoardo, Asnicar, Francesco, Huang, Kun D., Tett, Adrian, Manara, Serena, Armanini, Federica, Bain, Debbie +14 more·2020·Genome Biology

Abstract

Background: Eubacterium rectale is one of the most prevalent human gut bacteria, but its diversity and population genetics are not well understood because large-scale whole-genome investigations of this microbe have not been carried out. Results: Here, we leverage metagenomic assembly followed by a reference-based binning strategy to screen over 6500 gut metagenomes spanning geography and lifestyle and reconstruct over 1300 E. rectale high-quality genomes from metagenomes. We extend previous results of biogeographic stratification, identifying a new subspecies predominantly found in African individuals and showing that closely related non-human primates do not harbor E. rectale. Comparison of pairwise genetic and geographic distances between subspecies suggests that isolation by distance and co-dispersal with human populations might have contributed to shaping the contemporary population structure of E. rectale. We confirm that a relatively recently diverged E. rectale subspecies specific to Europe consistently lacks motility operons and that it is immotile in vitro, probably due to ancestral genetic loss. The same subspecies exhibits expansion of its carbohydrate metabolism gene repertoire including the acquisition of a genomic island strongly enriched in glycosyltransferase genes involved in exopolysaccharide synthesis. Conclusions: Our study provides new insights into the population structure and ecology of E. rectale and shows that shotgun metagenomes can enable population genomics studies of microbiota members at a resolution and scale previously attainable only by extensive isolate sequencing.

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Crossref · 10.1186/s13059-020-02042-y

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  • Geographical origin is a major driver of intraspecific diversity, shaping host traits from diet to antibiotic exposure.

    “Indeed, geographical origin is a major driver of intraspecific diversity, shaping host traits from diet to antibiotic exposure [94-97] .”

    From Genome-scale insights into the metabolic landscape and evolutionary development of Bifidobacterium bifidum (2026) · cites this paper as [95]

    The Results and discussion section reports a correlation between geographic and genetic distances among E. rectale subspecies, supporting a geographic component to intraspecific diversity. The Discussion says isolation by distance is likely not the only influence and reports no significant association between subspecies and diet; it does not establish that geography shapes host diet or antibiotic exposure. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • A large fraction of the gut microbiome's individual uniqueness is encoded at the level of single strains.

    “and a large fraction of this uniqueness is encoded at the level of single strains36–38.”

    From Cross-cohort gut microbiome associations with immune checkpoint inhibitor response in advanced melanoma (2022) · cites this paper as [38]

    The Introduction says human gut microbiota composition varies across individuals, and the Results and discussion document genetic differences among E. rectale strains. But the paper does not establish that a large fraction of individuals’ gut-microbiome uniqueness is encoded at the single-strain level across the microbiome; its strain analysis focuses on one species. The indexed passages provide section labels but no page numbers. (LLM, conf=0.82)

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Research works printed but not linked: 4

  1. [19]Tett A, Huang KD, Asnicar F, Fehlner-Peach H, Pasolli E, Karcher N, et al. bioRxiv. 2019:600593 Available from: https://www.biorxiv.org/content/10.1101/600593v1. [cited 2019 Jun 5]. · DOI
  2. [51]Manara S, Asnicar F, Beghini F et al. Microbial genomes from non-human primate gut metagenomes expand the primate-associated bacterial tree of life with over 1000 novel species. Genome Biol. 2019;20:299. PMC6935492 31883524
  3. [81]Karcher N, Pasolli E, Asnicar F, Huang KD, Tett A, Manara S, et al: Eubacterium rectale Strain L2–21 Genome Assembly. NCBI RefSeq. Accession GCF_008122485.1. https://www.ncbi.nlm.nih.gov/assembly/GCF_008122485.1. August 2019.
  4. [82]Karcher N, Pasolli E, Asnicar F, Huang KD, Tett A, Manara S, et al: Eubacterium rectale Strain T3Wbe13 Genome Assembly. NCBI RefSeq. Accession GCF_008123415.1. https://www.ncbi.nlm.nih.gov/assembly/GCF_008123415.1. Accessed August 2019.

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Authors
Karcher, N., Pasolli, E., Asnicar, F., Huang, K. D., Tett, A., Manara, S., Armanini, F., Bain, D., Duncan, S. H., Louis, P., Zolfo, M., Manghi, P., Valles-Colomer, M., Raffaetà, R., Rota-Stabelli, O., Collado, M. C., Zeller, G., Falush, D., Maixner, F., Walker, A. W., Huttenhower, C., & Segata, N.
Affiliations
  • University of Trento (IT)
  • University of Naples Federico II (IT)
  • Fondazione Edmund Mach (IT)
  • University of Aberdeen (GB)
  • Free University of Bozen-Bolzano (IT)
  • European Molecular Biology Laboratory (DE)
  • University of Bath (GB)
  • Eurac Research (IT)
  • Broad Institute (US)
Corresponding author
Segata, Nicola
Venue
Genome Biology
Published
2020-06-08
Volume
21
Issue
1
Pages
138-138
ISSN
  • 1465-6906 (ISSN-L)
  • 1474-760X
OpenAlex
W3033825041
Cited by
116
References
83
Citations by year
2026: 18 · 2025: 17 · 2024: 21 · 2023: 15 · 2022: 22 · 2021: 14 · 2020: 7 · 2019: 1
FWCI
4.79
Type
journal article
Language
en
Open access
Locations
  • Genome biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Aberdeen University Research Archive (Aberdeen University) (submittedVersion)
  • Institutional Research Information System (Università degli Studi di Trento) (submittedVersion, cc-by)
  • CINECA IRIS Institutional Research Information System (Fondazione Edmund Mach) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • ARCA (Università Ca' Foscari Venezia) (submittedVersion, other-oa)
  • Open Research (University of Surrey) (submittedVersion, other-oa)
Funders
H2020 European Research Council (716575)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
Keywords
Eubacterium rectale, gut microbiota, population structure, phylogeography, subspecies, metagenome-assembled genomes, isolation by distance, carbohydrate metabolism, genomic islands, glycosyltransferases, exopolysaccharide biosynthesis, human gut bacteria, non-human primates
MeSH terms
Gastrointestinal Microbiome, Adolescent, Adult, Aged, Child, Child, Preschool, Eubacterium, Humans, Infant, Middle Aged, Genome, Bacterial, Glycosyltransferases, Carbohydrate Metabolism, Metagenome, Young Adult, Phylogeography

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