Dichotomous feedback: a signal sequestration-based feedback mechanism for biocontroller design.
Dichotomous feedback: a signal sequestration-based feedback mechanism for biocontroller design.
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DOI:
10.1098/rsif.2021.0737
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发表时间:
2022-04
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We introduce a new design framework for implementing negative feedback regulation in synthetic biology, which we term ‘dichotomous feedback’. Our approach is different from current methods, in that it sequesters existing fluxes in the process to be controlled, and in this way takes advantage of the process’s architecture to design the control law. This signal sequestration mechanism appears in many natural biological systems and can potentially be easier to realize than ‘molecular sequestration’ and other comparison motifs that are nowadays common in biomolecular feedback control design. The loop is closed by linking the strength of signal sequestration to the process output. Our feedback regulation mechanism is motivated by two-component signalling systems, where a second response regulator could be competing with the natural response regulator thus sequestering kinase activity. Here, dichotomous feedback is established by increasing the concentration of the second response regulator as the level of the output of the natural process increases. Extensive analysis demonstrates how this type of feedback shapes the signal response, attenuates intrinsic noise while increasing robustness and reducing crosstalk.
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DOI:
10.1126/science.1256272
发表时间:
2014-11-14
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
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DOI:
10.1099/mic.0.067975-0
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期刊:
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影响因子:
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Serrano, L
DOI:
10.1073/pnas.1114235109
发表时间:
2012-03-27
影响因子:
11.1
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通讯作者:
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影响因子:
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