Genomic and metabolic adaptations of Methanobrevibacter smithii to the human gut
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چکیده
منابع مشابه
Genomic and metabolic adaptations of Methanobrevibacter smithii to the human gut.
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 adiposi...
متن کاملCharacteristics of a water-forming NADH oxidase from Methanobrevibacter smithii, an archaeon in the human gut
NADH oxidases (NOXs) catalysing the oxidation of NADH to yield NAD+ and H2O, H2O2, or both play an important role in protecting organisms from oxidative stress and maintaining the balance of NAD+/NADH. A gene encoding NOX was identified from Methanobrevibacter smithii (NOX-ms), the predominant archaeon in the human gut ecosystem. Subsequent analyses showed that it is an FAD-containing protein w...
متن کاملHigh Prevalence of Methanobrevibacter smithii and Methanosphaera stadtmanae Detected in the Human Gut Using an Improved DNA Detection Protocol
BACKGROUND The low and variable prevalence of Methanobrevibacter smithii and Methanosphaera stadtmanae DNA in human stool contrasts with the paramount role of these methanogenic Archaea in digestion processes. We hypothesized that this contrast is a consequence of the inefficiencies of current protocols for archaeon DNA extraction. We developed a new protocol for the extraction and PCR-based de...
متن کاملThe Intestinal Archaea Methanosphaera stadtmanae and Methanobrevibacter smithii Activate Human Dendritic Cells
The methanoarchaea Methanosphaera stadtmanae and Methanobrevibacter smithii are known to be part of the indigenous human gut microbiota. Although the immunomodulatory effects of bacterial gut commensals have been studied extensively in the last decade, the impact of methanoarchaea in human's health and disease was rarely examined. Consequently, we studied and report here on the effects of M. st...
متن کاملStability of Methanobrevibacter smithii populations in the microbial flora excreted from the human large bowel.
Total anaerobic bacteria and Methanobrevibacter smithii populations were enumerated in fecal specimens from two individuals over 10- and 13-month periods. The ratio of M. smithii to total anaerobic count varied between the individuals, but it was a relatively constant proportion of the large-bowel microbial flora within each individual. Neither a barium enema examination of one subject nor a ra...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2007
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0704189104