P recision design of stable genetic circuits carried in highly‐insulated E. coli genomic landing pads
Name
msb.20209584.pdf
Description
Published version
Size
674.21 KB
Format
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Checksum (MD5)
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Author(s)
Park, Yongjin
Espah Borujeni, Amin
Gorochowski, Thomas E
Shin, Jonghyeon
Voigt, Christopher A
Date Issued
2020
Journal
Molecular Systems Biology
Publisher
EMBO
Version
Final published version
Abstract
© 2020 The Authors. Published under the terms of the CC BY 4.0 license Genetic circuits have many applications, from guiding living therapeutics to ordering process in a bioreactor, but to be useful they have to be genetically stable and not hinder the host. Encoding circuits in the genome reduces burden, but this decreases performance and can interfere with native transcription. We have designed genomic landing pads in Escherichia coli at high-expression sites, flanked by ultrastrong double terminators. DNA payloads >8 kb are targeted to the landing pads using phage integrases. One landing pad is dedicated to carrying a sensor array, and two are used to carry genetic circuits. NOT/NOR gates based on repressors are optimized for the genome and characterized in the landing pads. These data are used, in conjunction with design automation software (Cello 2.0), to design circuits that perform quantitatively as predicted. These circuits require fourfold less RNA polymerase than when carried on a plasmid and are stable for weeks in a recA+ strain without selection. This approach enables the design of synthetic regulatory networks to guide cells in environments or for applications where plasmid use is infeasible.
MIT Department
Massachusetts Institute of Technology. Synthetic Biology Center
Massachusetts Institute of Technology. Department of Biological Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.15252/MSB.20209584
