Pyruvate-responsive genetic circuits for dynamic control of central metabolism
File(s)NCB-Dual-Pyruvate manuscript20200925.docx (1.25 MB)
Accepted version
Author(s)
Type
Journal Article
Abstract
Dynamic regulation is a promising strategy for fine-tuning metabolic fluxes in microbial cell factories. However, few of these synthetic regulatory systems have been developed for central carbon metabolites. Here we created a set of programmable and bifunctional pyruvate-responsive genetic circuits for dynamic dual control (activation and inhibition) of central metabolism in Bacillus subtilis. We used these genetic circuits to design a feedback loop control system that relies on the intracellular concentration of pyruvate to fine-tune the target metabolic modules, leading to the glucaric acid titer increasing from 207 to 527 mg l−1. The designed logic gate-based circuits were enabled by the characterization of a new antisense transcription mechanism in B. subtilis. In addition, a further increase to 802 mg l−1 was achieved by blocking the formation of by-products. Here, the constructed pyruvate-responsive genetic circuits are presented as effective tools for the dynamic control of central metabolism of microbial cell factories.
Date Issued
2020-09-07
Date Acceptance
2020-07-30
Citation
Nature Chemical Biology, 2020, 16, pp.1261-1268
ISSN
1552-4450
Publisher
Nature Research
Start Page
1261
End Page
1268
Journal / Book Title
Nature Chemical Biology
Volume
16
Copyright Statement
© 2020 Springer-Nature. The final publication is available at Springer via https://doi.org/10.1038/s41589-020-0637-3
Sponsor
Biotechnology and Biological Sciences Research Council (BBSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000566865800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
BB/R01602X/1
Subjects
Science & Technology
Life Sciences & Biomedicine
Biochemistry & Molecular Biology
HIGH-LEVEL EXPRESSION
TRANSCRIPTIONAL INTERFERENCE
BACILLUS-SUBTILIS
PATHWAY REGULATION
RNA-POLYMERASES
SYSTEM
PRODUCTIVITY
DEGRADATION
PROTEINS
PROMOTER
Publication Status
Published
Date Publish Online
2020-09-07