Apr 5, 2020

A Lysate Proteome Engineering Strategy for Enhancing Cell-Free Metabolite Production

BioRxiv : the Preprint Server for Biology
D. C. GarciaMitchel J Doktycz


Cell-free systems present a significant opportunity to harness the metabolic potential of diverse organisms. Removing the cellular context provides the ability to produce biological products without the need to maintain cell viability and enables metabolic engineers to explore novel chemical transformation systems. Crude extracts maintain much of a cells capabilities. However, only limited tools are available for engineering the contents of the extracts used for cell-free systems. Thus, our ability to take full advantage of the potential of crude extracts for cell-free metabolic engineering is limited. Here, we employ Multiplex Automated Genomic Engineering (MAGE) to tag proteins for selective removal from crude extracts so as to specifically direct chemical production. Specific edits to central metabolism are possible without significantly impacting cell growth. Selective removal of pyruvate degrading enzymes are demonstrated that result in engineered crude lysates that are capable of 10 to 20-fold increases of pyruvate production when compared to the non-engineered extract. The described approach melds the tools of systems and synthetic biology to develop cell-free metabolic engineering into a practical platform for both biop...Continue Reading

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Mentioned in this Paper

Quantitative Trait Loci
Genetic Analysis
Transcription Process
Polymerase Chain Reaction Analysis
Gene Expression
Fluorescent stain

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