|
| Status |
Public on May 22, 2010 |
| Title |
Dissecting the in vivo metabolic potential of two human gut acetogens. |
| Organisms |
Bacteroides thetaiotaomicron VPI-5482; Blautia hydrogenotrophica DSM 10507; Marvinbryantia formatexigens DSM 14469; Escherichia coli str. K-12 substr. MG1655 |
| Experiment type |
Expression profiling by high throughput sequencing
|
| Summary |
Fermenting microbial communities generate hydrogen: its removal through production of acetate, methane, or hydrogen sulfide modulates the efficiency of energy extraction from available nutrients in many ecosystems. We noted that pathway components for acetogenesis are more abundantly and consistently represented in the gut microbiomes of monozygotic twins and their mothers than components for methanogenesis or sulfate reduction, and subsequently analyzed the metabolic potential of two sequenced human gut acetogens, Blautia hydrogenotrophica and Marvinbryantia formatexigens in vitro and in the intestines of gnotobiotic mice harboring a prominent saccharolytic bacterium. To do so, we developed a generally applicable method for multiplex sequencing of expressed microbial mRNAs, and together with mass spectrometry of metabolites, show that these organisms have distinct patterns of substrate utilization. B. hydrogenotrophica targets aliphatic and aromatic amino acids. It increases the efficiency of fermentation by consuming reducing equivalents, thereby maintaining a high NAD+/NADH ratio and boosting acetate production. In contrast, M. formatexigens consumes oligosaccharides, does not impact the redox state of the gut, and boosts the yield of succinate. These findings have strategic implications for those who wish to manipulate the hydrogen economy of gut microbial communities in ways that modulate energy harvest.
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| Overall design |
119 Samples consisting of Bacteroides thetaiotaomicron, Marvinbryantia formatexigens, and Blautia hydrogenotrophica cecal and fecal samples. Please see the individual Sample descriptions for more information.
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| Contributor(s) |
Rey FE, Faith JJ |
| Citation(s) |
20444704, 20631792 |
| |
| Submission date |
May 19, 2010 |
| Last update date |
May 15, 2019 |
| Contact name |
Jeremiah J Faith |
| E-mail(s) |
faithj@wustl.edu
|
| Organization name |
Washington University in St. Louis
|
| Street address |
Campus Box 8510
|
| City |
Saint Louis |
| State/province |
MO |
| ZIP/Postal code |
63108 |
| Country |
USA |
| |
|
| Platforms (6)
|
| GPL10434 |
Illumina Genome Analyzer II (Bacteroides thetaiotaomicron VPI-5482) |
| GPL10435 |
Illumina Genome Analyzer II (Bacteroides thetaiotaomicron VPI-5482; Blautia hydrogenotrophica DSM 10507) |
| GPL10436 |
Illumina Genome Analyzer II (Blautia hydrogenotrophica DSM 10507) |
| GPL10438 |
Illumina Genome Analyzer II (Escherichia coli str. K-12 substr. MG1655) |
| GPL21670 |
Illumina Genome Analyzer II (Marvinbryantia formatexigens DSM 14469) |
| GPL21671 |
Illumina Genome Analyzer II (Bacteroides thetaiotaomicron VPI-5482; Marvinbryantia formatexigens DSM 14469) |
|
| Samples (119)
|
|
| Relations |
| SRA |
SRP002488 |
| BioProject |
PRJNA126827 |
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