Bacterial sugar utilization gives rise to distinct single-cell behaviours.
Bacterial sugar utilization gives rise to distinct single-cell behaviours.
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DOI:
10.1111/mmi.12695
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发表时间:
2014-09
影响因子:
3.6
通讯作者:
Beisel CL
中科院分区:
文献类型:
--
作者:
Afroz T;Biliouris K;Kaznessis Y;Beisel CL
Inducible utilization pathways reflect widespread microbial strategies to uptake and consume sugars from the environment. Despite their broad importance and extensive characterization, little is known how these pathways naturally respond to their inducing sugar in individual cells. Here, we performed single-cell analyses to probe the behavior of representative pathways in the model bacterium Escherichia coli. We observed diverse single-cell behaviors, including uniform responses (D-lactose, D-galactose, N-acetylglucosamine, N-acetylneuraminic acid), “all-or-none” responses (D-xylose, L-rhamnose), and complex combinations thereof (L-arabinose, D-gluconate). Mathematical modeling and probing of genetically modified pathways revealed that the simple framework underlying these pathways—inducible transport and inducible catabolism—could give rise to most of these behaviors. Sugar catabolism was also an important feature, as disruption of catabolism eliminated tunable induction as well as enhanced memory of previous conditions. For instance, disruption of catabolism in pathways that respond to endogenously synthesized sugars led to full pathway induction even in the absence of exogenous sugar. Our findings demonstrate the remarkable flexibility of this simple biological framework, with direct implications for environmental adaptation and the engineering of synthetic utilization pathways as titratable expression systems and for metabolic engineering.
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影响因子:
3.5
作者:
CHEREPANOV, PP;WACKERNAGEL, W
通讯作者:
WACKERNAGEL, W
影响因子:
4.7
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Afroz, Taliman;Beisel, Chase L.
通讯作者:
Beisel, Chase L.
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通讯作者:
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通讯作者:
SCHLEIF, RF
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COHN, M;HORIBATA, K
通讯作者:
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