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Analysis of Interactions between Endobiotics and Human Gut Microbiota Using In Vitro Bath Fermentation Systems

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Bacteroides propionicigenes sp. nov., isolated from human faeces.

Xin-Wei Sun¹, Rashidin Abdugheni^2,3, Hao-Jie Huang^1,2

¹State Key Laboratory of Microbial Biotechnology, Shandong University, Qingdao 266000, PR China.

International Journal of Systematic and Evolutionary Microbiology

|May 31, 2022

Summary

This summary is machine-generated.

A novel anaerobic bacterium, Bacteroides propionicigenes NSJ-90T, was identified from human feces. This discovery expands our understanding of the Bacteroides genus in the human gut microbiome.

Keywords:

Bacteroides propionicigenes human faeces strain NSJ-90T

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Published on: August 13, 2021

Area of Science:

Microbiology
Gut Microbiome Research
Bacteriology

Background:

The human gut harbors a complex microbial ecosystem, with anaerobic bacteria playing crucial roles.
The genus Bacteroides is a significant component of this ecosystem, involved in various host-associated functions.

Purpose of the Study:

To isolate and characterize a novel anaerobic bacterial strain from human feces.
To determine the phylogenetic, phenotypic, and chemotaxonomic properties of the novel strain.
To propose a new species within the genus Bacteroides.

Main Methods:

Isolation of anaerobic bacteria from healthy adult human feces.
16S rRNA gene sequence analysis for phylogenetic placement.
Genome sequencing for DNA G+C content determination.
Analysis of cellular fatty acids and fermentation products.
Phylogenetic, phenotypic, and chemotaxonomic evaluations.

Main Results:

A novel anaerobic, Gram-negative, rod-shaped bacterium, strain NSJ-90T, was isolated.
Phylogenetic analysis placed strain NSJ-90T within the genus Bacteroides, closely related to Bacteroides clarus.
DNA G+C content was 44.85 mol%, and average nucleotide identity with B. clarus was 87.60%.
Major fatty acids included iso-C15:0, anteiso-C15:0, and iso-C17:0 3-OH. Glucose fermentation yielded acetic, propionic, and isovaleric acids.

Conclusions:

Strain NSJ-90T represents a novel species within the genus Bacteroides based on comprehensive analyses.
The proposed name for this new species is Bacteroides propionicigenes sp. nov.
This finding contributes to the taxonomic diversity of the human gut microbiota.