Enhanced Metabolite Productivity of Escherichia coli Adapted to Glucose M9 Minimal Medium.

ABSTRACT: High productivity of biotechnological strains is important to industrial fermentation processes and can be constrained by precursor availability and substrate uptake rate. Adaptive laboratory evolution (ALE) of Escherichia coli MG1655 to glucose minimal M9 medium has been shown to increase strain fitness, mainly through a key mutation in the transcriptional regulator rpoB, which increases flux through central carbon metabolism and the glucose uptake rate. We wanted to test the hypothesis that a substrate uptake enhancing rpoB mutation can translate to increased productivity in a strain possessing a heterologous metabolite pathway. When engineered for heterologous mevalonate production, we found that E. coli rpoB E672K strains displayed 114-167% higher glucose up

SUBMITTER: Rugbjerg P 

PROVIDER: S-EPMC6240765 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature