Engineered Regulatory Systems Modulate Gene Expression of Human Commensals in the Gut.

Engineered Regulatory Systems Modulate Gene Expression of Human Commensals in the Gut.
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DOI:
10.1016/j.cell.2017.03.045
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发表时间:
2017-04-20
期刊:
影响因子:
64.5
通讯作者:
Goodman AL
Goodman AL
中科院分区:
生物学1区
文献类型:
--
作者:
Lim B;Zimmermann M;Barry NA;Goodman AL

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The gut microbiota is implicated in numerous aspects of health and disease, but dissecting these connections is challenging because genetic tools for gut anaerobes are limited. Inducible promoters are particularly valuable tools, because these platforms allow real-time analysis of the contribution of microbiome gene products to community assembly, host physiology, and disease. We developed a panel of tunable expression platforms for the prominent genus Bacteroides in which gene expression is controlled by a synthetic inducer. In the absence of inducer, promoter activity is fully repressed; addition of inducer rapidly increases gene expression by 4 to 5 orders of magnitude. Because the inducer is absent in mice and their diets, Bacteroides gene expression inside the gut can be modulated by providing the inducer in drinking water. We use this system to measure the dynamic relationship between commensal sialidase activity and liberation of mucosal sialic acid, a receptor and nutrient for pathogens.
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