Mucosal glycan foraging enhances fitness and transmission of a saccharolytic human gut bacterial symbiont.
Mucosal glycan foraging enhances fitness and transmission of a saccharolytic human gut bacterial symbiont.
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DOI:
10.1016/j.chom.2008.09.007
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发表时间:
2008-11-13
影响因子:
30.3
通讯作者:
Gordon JI
中科院分区:
文献类型:
--
作者:
Martens EC;Chiang HC;Gordon JI
The distal human gut is a microbial bioreactor that digests complex carbohydrates. The strategies evolved by gut microbes to sense and process diverse glycans have important implications for the assembly and operations of this ecosystem. The human gut bacterium Bacteroides thetaiotaomicron forages on host and dietary glycans. Its ability to target these substrates resides in 88 polysaccharide utilization loci (PULs), encompassing 18% of its genome. In this report, whole-genome transcriptional profiling and genetic tests are used to define the mechanisms underlying host glycan foraging in vivo and in vitro. PULs that target all major classes of host glycans were identified. Mucin O-glycans are the principal substrate foraged in vivo. Simultaneous deletion of five ECF-σ transcription factors that activate mucin O-glycan utilization produces defects in bacterial persistence in the gut and in mother-to-offspring transmission. Thus, PUL-mediated glycan catabolism is an important factor in gut colonization and likely impacts gut ecology.
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影响因子:
15.8
作者:
Heazlewood CK;Cook MC;Eri R;Price GR;Tauro SB;Taupin D;Thornton DJ;Png CW;Crockford TL;Cornall RJ;Adams R;Kato M;Nelms KA;Hong NA;Florin TH;Goodnow CC;McGuckin MA
通讯作者:
McGuckin MA
影响因子:
4.4
作者:
Moran, NA;Tran, P;Gerardo, NM
通讯作者:
Gerardo, NM
DOI:
10.1073/pnas.0504978102
发表时间:
2005-08-02
影响因子:
11.1
作者:
Ley, RE;Bäckhed, F;Gordon, JI
通讯作者:
Gordon, JI
影响因子:
24.5
作者:
PULLAN, RD;THOMAS, GAO;RHODES, J
通讯作者:
RHODES, J
影响因子:
3.2
作者:
CHENG, QO;YU, MC;SALYERS, AA
通讯作者:
SALYERS, AA