Tuning Transcriptional Regulation through Signaling: A Predictive Theory of Allosteric Induction
Tuning Transcriptional Regulation through Signaling: A Predictive Theory of Allosteric Induction
复制标题
通过信号传导调节转录调控:变构诱导的预测理论
DOI:
10.1101/111013
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发表时间:
2017
期刊:
影响因子:
9.3
通讯作者:
R. Phillips
中科院分区:
文献类型:
--
作者:
M. Razo;Stephanie L. Barnes;Nathan M. Belliveau;Griffin Chure;Tal Einav;M. Lewis;R. Phillips
Allosteric regulation is found across all domains of life, yet we still lack simple, predictive theories that directly link the experimentally tunable parameters of a system to its input-output response. To that end, we present a general theory of allosteric transcriptional regulation using the Monod-Wyman-Changeux model. We rigorously test this model using the ubiquitous simple repression motif in bacteria by first predicting the behavior of strains that span a large range of repressor copy numbers and DNA binding strengths and then constructing and measuring their response. Our model not only accurately captures the induction profiles of these strains but also enables us to derive analytic expressions for key properties such as the dynamic range and [EC50]. Finally, we derive an expression for the free energy of allosteric repressors which enables us to collapse our experimental data onto a single master curve that captures the diverse phenomenology of the induction profiles.
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