Title |
Tuning the dynamic range of bacterial promoters regulated by ligand-inducible transcription factors
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Published in |
Nature Communications, January 2018
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DOI | 10.1038/s41467-017-02473-5 |
Pubmed ID | |
Authors |
Ye Chen, Joanne M. L. Ho, David L. Shis, Chinmaya Gupta, James Long, Daniel S. Wagner, William Ott, Krešimir Josić, Matthew R. Bennett |
Abstract |
One challenge for synthetic biologists is the predictable tuning of genetic circuit regulatory components to elicit desired outputs. Gene expression driven by ligand-inducible transcription factor systems must exhibit the correct ON and OFF characteristics: appropriate activation and leakiness in the presence and absence of inducer, respectively. However, the dynamic range of a promoter (i.e., absolute difference between ON and OFF states) is difficult to control. We report a method that tunes the dynamic range of ligand-inducible promoters to achieve desired ON and OFF characteristics. We build combinatorial sets of AraC-and LasR-regulated promoters containing -10 and -35 sites from synthetic and Escherichia coli promoters. Four sequence combinations with diverse dynamic ranges were chosen to build multi-input transcriptional logic gates regulated by two and three ligand-inducible transcription factors (LacI, TetR, AraC, XylS, RhlR, LasR, and LuxR). This work enables predictable control over the dynamic range of regulatory components. |
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Denmark | 1 | 2% |
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Indonesia | 1 | 2% |
Israel | 1 | 2% |
Other | 0 | 0% |
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Demographic breakdown
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Scientists | 21 | 34% |
Science communicators (journalists, bloggers, editors) | 1 | 2% |
Mendeley readers
Geographical breakdown
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Unknown | 362 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 107 | 30% |
Researcher | 50 | 14% |
Student > Master | 47 | 13% |
Student > Bachelor | 45 | 12% |
Student > Doctoral Student | 15 | 4% |
Other | 29 | 8% |
Unknown | 69 | 19% |
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Chemistry | 9 | 2% |
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Unknown | 88 | 24% |