Bacteroides thetaiotaomicron
2018
Porter, Nathan T. | Luis, Ana S. | Martens, Eric C.
[Display omitted]This infographic on Bacteroides thetaiotaomicron (Bt) explores the ability of this microbe to digest a broad array of complex carbohydrates, alter its surface features, and its emerging role in gastrointestinal diseases.The infographic of Bacteroides thetaiotaomicron (Bt) illustrates two key facets of its symbiotic lifestyle in the human gut: a broad ability to digest dietary fiber polysaccharides and host glycans, and a dynamic cell-surface architecture that promotes both interactions with and evasion of the host immune system. The starch-utilization system (Sus) is a cell-surface and periplasmic system involved in starch cleavage and transport. Over 80 additional Sus-like systems utilize substrates ranging from host glycans to plant cell wall pectins. Bt has evolved intricate strategies to interact with other microbes or its host, including modification of its surface. Some nutrient utilization pathways select for or directly trigger changes in capsular polysaccharide (CPS) expression. Like other fermentative members of the gut microbiome, Bt produces host absorbable short-chain and organic acids, which can all be absorbed by the host as a source of energy.
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