| Autor: |
Pudlo, Nicholas A., Pereira, Gabriel Vasconcelos, Parnami, Jaagni, Cid, Melissa, Markert, Stephanie, Tingley, Jeffrey P., Unfried, Frank, Ali, Ahmed, Varghese, Neha J., Kim, Kwi S., Campbell, Austin, Urs, Karthik, Xiao, Yao, Adams, Ryan, Martin, Duña, Bolam, David N., Becher, Dörte, Eloe-Fadrosh, Emiley A., Schmidt, Thomas M., Abbott, D. Wade |
| Zdroj: |
Cell Host & Microbe; Mar2022, Vol. 30 Issue 3, p314-314, 1p |
| Abstrakt: |
Humans harbor numerous species of colonic bacteria that digest fiber polysaccharides in commonly consumed terrestrial plants. More recently in history, regional populations have consumed edible macroalgae seaweeds containing unique polysaccharides. It remains unclear how extensively gut bacteria have adapted to digest these nutrients. Here, we show that the ability of gut bacteria to digest seaweed polysaccharides is more pervasive than previously appreciated. Enrichment-cultured Bacteroides harbor previously discovered genes for seaweed degradation, which have mobilized into several members of this genus. Additionally, other examples of marine bacteria-derived genes, and their mobile DNA elements, are involved in gut microbial degradation of seaweed polysaccharides, including genes in gut-resident Firmicutes. Collectively, these results uncover multiple separate events that have mobilized the genes encoding seaweed-degrading-enzymes into gut bacteria. This work further underscores the metabolic plasticity of the human gut microbiome and global exchange of genes in the context of dietary selective pressures. • Human gut bacteria have acquired genetic upgrades enabling edible seaweed digestion • Bacteroides genes for agarose degradation reside on a large, mobilizable plasmids • Some human Firmicutes have also gained the ability to degrade seaweed polysaccharides • At least four separate events mobilized porphyran and/or agarose genes into gut bacteria Humans in several geographic regions have historically consumed seaweeds in forms such as sushi, introducing novel dietary fiber polysaccharides to the gut. Pudlo, Pereira et al. show that a variety of mobile DNA elements have participated in transferring genes from marine bacteria, enabling gut bacteria to digest seaweed polysaccharides. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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