Analog nitrogen sensing in Escherichia coli enables high fidelity information processing

Analog nitrogen sensing in Escherichia coli enables high fidelity information processing
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大肠杆菌中的模拟氮传感可实现高保真信息处理

DOI:
10.1101/015792
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发表时间:
2015
期刊:
--
影响因子:
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通讯作者:
Komorowski M
Komorowski M
中科院分区:
--
文献类型:
--
作者:
Komorowski M

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协调有机体对不断变化的环境条件的反应的分子反应网络是生存和繁殖的核心。土方大肠杆菌采用准确和灵活的信号系统,能够快速和高精度地处理环境氮的可用性。仔细协调翻译后修饰的PII和谷氨酰胺合成酶允许。colito跟踪氮的可用性在一个连续的,明确的非数字的方式。我们测量了蛋白质组学和代谢组学的动态响应,以追踪模拟计算,并使用信息理论框架来表征E.大肠杆菌的氮传感网络:我们发现这个系统可以传输多达9bits的氮状态信息。这使得细胞即使对代谢物浓度的微小差异也能快速准确地做出反应。
The molecular reaction networks that coordinate the response of an organism to changing environmental conditions are central for survival and reproduction.Escherchia coliemploys an accurate and flexible signalling system that is capable of processing ambient nitrogen availability rapidly and with high accuracy. Carefully orchestrated post-translational modifications of PII and the glutamine synthetase allowE. colito trace nitrogen availability in a continuous, decidedly non-digital fashion. We measure the dynamic proteomic and metabolomic responses to trace the analog computations, and use an information theoretical framework to characterize the information capacity ofE. coli’s nitrogen sensing network: we find that this system can transmit up to 9bits of information about the nitrogen state. This allows cells to respond rapidly and accurately even to small differences in metabolite concentrations.
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