Glycan foraging in vivo by an intestine-adapted bacterial symbiont - PubMed (original) (raw)
. 2005 Mar 25;307(5717):1955-9.
doi: 10.1126/science.1109051.
Affiliations
- PMID: 15790854
- DOI: 10.1126/science.1109051
Glycan foraging in vivo by an intestine-adapted bacterial symbiont
Justin L Sonnenburg et al. Science. 2005.
Abstract
Germ-free mice were maintained on polysaccharide-rich or simple-sugar diets and colonized for 10 days with an organism also found in human guts, Bacteroides thetaiotaomicron, followed by whole-genome transcriptional profiling of bacteria and mass spectrometry of cecal glycans. We found that these bacteria assembled on food particles and mucus, selectively induced outer-membrane polysaccharide-binding proteins and glycoside hydrolases, prioritized the consumption of liberated hexose sugars, and revealed a capacity to turn to host mucus glycans when polysaccharides were absent from the diet. This flexible foraging behavior should contribute to ecosystem stability and functional diversity.
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