Analog nitrogen sensing in Escherichia coli enables high fidelity information processing
Analog nitrogen sensing in Escherichia coli enables high fidelity information processing
复制标题
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:
--
通讯作者:
Komorowski M
中科院分区:
文献类型:
--
作者:
Komorowski M
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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通讯作者:
Melgarejo, Augusto
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DOI:
10.1073/pnas.97.26.14674
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2000-12-19
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Rabinowitz, Joshua D.