Cited by 564Gut microbiota and healthAnaerobic Digestion and Biogas ProductionOral microbiology and periodontitis research

Genomic and metabolic adaptations of Methanobrevibacter smithii to the human gut

Open access
Samuel, Buck S., Hansen, Elizabeth E., Manchester, Jill K., Coutinho, Pedro M., Henrissat, Bernard, Fulton, Robert, Latreille, Philippe, Kim, Kung +2 more·2007·Proceedings of the National Academy of Sciences

Abstract

The human gut is home to trillions of microbes, thousands of bacterial phylotypes, as well as hydrogen-consuming methanogenic archaea. Studies in gnotobiotic mice indicate that Methanobrevibacter smithii , the dominant archaeon in the human gut ecosystem, affects the specificity and efficiency of bacterial digestion of dietary polysaccharides, thereby influencing host calorie harvest and adiposity. Metagenomic studies of the gut microbial communities of genetically obese mice and their lean littermates have shown that the former contain an enhanced representation of genes involved in polysaccharide degradation, possess more archaea, and exhibit a greater capacity to promote adiposity when transplanted into germ-free recipients. These findings have led to the hypothesis that M. smithii may be a therapeutic target for reducing energy harvest in obese humans. To explore this possibility, we have sequenced its 1,853,160-bp genome and compared it to other human gut-associated M. smithii strains and other Archaea. We have also examined M. smithii 's transcriptome and metabolome in gnotobiotic mice that do or do not harbor Bacteroides thetaiotaomicron , a prominent saccharolytic bacterial member of our gut microbiota. Our results indicate that M. smithii is well equipped to persist in the distal intestine through ( i ) production of surface glycans resembling those found in the gut mucosa, ( ii ) regulated expression of adhesin-like proteins, ( iii ) consumption of a variety of fermentation products produced by saccharolytic bacteria, and ( iv ) effective competition for nitrogenous nutrient pools. These findings provide a framework for designing strategies to change the representation and/or properties of M. smithii in the human gut microbiota.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.0704189104

Cites

27 of 27 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • M. smithii increases the fermentation efficiency of many bacterial taxa in the gut, including those that ferment complex polysaccharides.

    “M. smithii increases the fermentation efficiency of many bacterial taxa in the gut, including those that ferment complex polysaccharides [223].”

    From The athletic gut microbiota (2020) · cites this paper as [223]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Samuel, B. S., Hansen, E. E., Manchester, J. K., Coutinho, P. M., Henrissat, B., Fulton, R., Latreille, P., Kim, K., Wilson, R. K., & Gordon, J. I.
Affiliations
  • Washington University in St. Louis (US)
  • *Center for Genome Sciences and
  • Centre National de la Recherche Scientifique (FR)
  • Genome Sequencing Center, Washington University School of Medicine, St. Louis, MO 63108; and
Corresponding author
Gordon, Jeffrey I.
Venue
Proceedings of the National Academy of Sciences
Published
2007-06-19
Volume
104
Issue
25
Pages
10643-10648
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1982652385
Cited by
549
References
27
Citations by year
2026: 28 · 2025: 27 · 2024: 36 · 2023: 38 · 2022: 37 · 2021: 30 · 2020: 37 · 2019: 25 · 2018: 29 · 2017: 28 · 2016: 28 · 2015: 32 · 2014: 27 · 2013: 31 · 2012: 27
FWCI
8.51
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (0202737)
  • W. M. Keck Foundation
  • San Diego State University
  • National Institutes of Health
  • University of California, San Diego
  • National Institute of Diabetes and Digestive and Kidney Diseases (R37DK030292, DK-30292, DK 70977, R01DK070977, R01DK030292)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
Keywords
Methanobrevibacter smithii, human gut microbiome, methanogenic archaea, polysaccharide degradation, obesity, adiposity, energy harvesting, gnotobiotic mice, Bacteroides thetaiotaomicron, archaeal genomes, transcriptome, metabolome, nitrogen competition, hydrogen consumption, intestinal colonization
MeSH terms
Adaptation, Physiological, Animals, Bacteroides, Fermentation, Germ-Free Life, Humans, Intestines, Male, Models, Biological, Molecular Sequence Data, Genome, Bacterial, Genomics, Methanobrevibacter, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review