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Applying Advanced In Vitro Culturing Technology to Study the Human Gut Microbiota
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Comparative Population Genetics in the Human Gut Microbiome.

William R Shoemaker1, Daisy Chen1, Nandita R Garud1,2

  • 1Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA.

Genome Biology and Evolution
|May 24, 2021
PubMed
Summary

The human gut microbiome

Keywords:
comparative population geneticsmicrobial evolutionmicrobiomepopulation genetics

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Area of Science:

  • Microbiology
  • Genomics
  • Evolutionary Biology

Background:

  • The human gut microbiome influences critical phenotypes, including digestion and drug metabolism.
  • Understanding the origins and maintenance of genetic variation within the microbiome is limited.
  • The diverse species composition offers a unique system for comparative population genomics.

Purpose of the Study:

  • To highlight the potential of the human gut microbiome for comparative population genomics.
  • To identify universal evolutionary trends and species-specific deviations.
  • To analyze patterns of purifying selection across multiple gut microbial species.

Main Methods:

  • Comparative population genomics approach.
  • Analysis of genetic variation across approximately 40 prevalent human gut microbial species.
  • Reanalysis of purifying selection patterns.

Main Results:

  • The human gut microbiome assemblage provides a powerful system for comparative population genomics.
  • Identification of universal evolutionary dynamics across microbial species.
  • Revealed functional categories under varying selective constraints.

Conclusions:

  • The human gut microbiome is an underutilized resource for understanding evolutionary processes.
  • Comparative genomics can uncover novel genes and identify exceptional species.
  • Selective pressures vary across functional categories within the gut microbiome.