Authors
Ophelia S Venturelli, Mika Tei, Stefan Bauer, Leanne Jade G Chan, Christopher J Petzold, Adam P Arkin
Publication date
2017/4/26
Journal
Nature Communications
Volume
8
Issue
1
Pages
15128
Publisher
Nature Publishing Group UK
Description
Synthetic circuits embedded in host cells compete with cellular processes for limited intracellular resources. Here we show how funnelling of cellular resources, after global transcriptome degradation by the sequence-dependent endoribonuclease MazF, to a synthetic circuit can increase production. Target genes are protected from MazF activity by recoding the gene sequence to eliminate recognition sites, while preserving the amino acid sequence. The expression of a protected fluorescent reporter and flux of a high-value metabolite are significantly enhanced using this genome-scale control strategy. Proteomics measurements discover a host factor in need of protection to improve resource redistribution activity. A computational model demonstrates that the MazF mRNA-decay feedback loop enables proportional control of MazF in an optimal operating regime. Transcriptional profiling of MazF-induced cells …
Total citations
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Scholar articles
OS Venturelli, M Tei, S Bauer, LJG Chan, CJ Petzold… - Nature Communications, 2017