Enterohemorrhagic Escherichia coli senses low biotin status in the large intestine for colonization and infection.

Enterohemorrhagic Escherichia coli senses low biotin status in the large intestine for colonization and infection.
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肠出血性大肠杆菌感知大肠中的低生物素状态以进行定植和感染

DOI:
10.1038/ncomms7592
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发表时间:
2015-03-20
影响因子:
16.6
通讯作者:
Wang, Lei
Wang, Lei
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yang, Bin;Feng, Lu;Wang, Fang;Wang, Lei

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肠出血性大肠杆菌(EHEC)是一种重要的食源性病原体,通过定植大肠感染人类。在这里,我们确定了一种毒力调节途径,其中生物素蛋白连接酶BirA向全局调节剂Fur发出信号,后者反过来激活LEE(肠细胞清除位点)基因,以促进肠出血性大肠杆菌在低生物素大肠中的粘附。LEE基因在高生物素小肠中受到抑制,从而阻止粘附并确保大肠的选择性定植。该途径在所有9种肠出血性大肠杆菌血清型中均存在,这表明它是肠出血性大肠杆菌的重要进化策略。在密切相关的小肠致病性大肠杆菌中,由于缺乏对BirA的反应,该途径是不完整的。用富含生物素的饮食喂养的小鼠显示出明显降低的肠出血性大肠杆菌粘附性,这表明生物素可能有助于预防人类肠出血性大肠杆菌感染。
Enterohemorrhagic Escherichia coli (EHEC) is an important foodborne pathogen that infects humans by colonizing the large intestine. Here we identify a virulence-regulating pathway in which the biotin protein ligase BirA signals to the global regulator Fur, which in turn activates LEE (locus of enterocyte effacement) genes to promote EHEC adherence in the low-biotin large intestine. LEE genes are repressed in the high-biotin small intestine, thus preventing adherence and ensuring selective colonization of the large intestine. The presence of this pathway in all nine EHEC serotypes tested indicates that it is an important evolutionary strategy for EHEC. The pathway is incomplete in closely related small-intestinal enteropathogenic E. coli due to the lack of the Fur response to BirA. Mice fed with a biotin-rich diet show significantly reduced EHEC adherence, indicating that biotin might be useful to prevent EHEC infection in humans.
DOI: 10.1073/pnas.120163297
发表时间: 2000-06-06
影响因子: 11.1
作者:
Datsenko, KA;Wanner, BL
通讯作者: Wanner, BL
DOI: 10.1086/462422
发表时间: 2005-10-15
影响因子: 6.4
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DOI: 10.1099/mic.0.2006/003178-0
发表时间: 2007-03-01
期刊: MICROBIOLOGY-SGM
影响因子: 2.8
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DOI: 10.1128/iai.70.8.4362-4368.2002
发表时间: 2002-08-01
影响因子: 3.1
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DOI: 10.1371/journal.pone.0031092
发表时间: 2012
期刊: PloS one
影响因子: 3.7
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Dötsch A;Eckweiler D;Schniederjans M;Zimmermann A;Jensen V;Scharfe M;Geffers R;Häussler S
通讯作者: Häussler S