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Metabolic engineering of Escherichia coli for shikimate pathway derivative production from glucose–xylose co-substrate
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Metabolic engineering of Escherichia coli for shikimate pathway derivative production from glucose–xylose co-substrate
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Journal Article
Metabolic engineering of Escherichia coli for shikimate pathway derivative production from glucose–xylose co-substrate
2020
Overview
Glucose and xylose are the major components of lignocellulose. Effective utilization of both sugars can improve the efficiency of bioproduction. Here, we report a method termed parallel metabolic pathway engineering (PMPE) for producing shikimate pathway derivatives from glucose–xylose co-substrate. In this method, we seek to use glucose mainly for target chemical production, and xylose for supplying essential metabolites for cell growth. Glycolysis and the pentose phosphate pathway are completely separated from the tricarboxylic acid (TCA) cycle. To recover cell growth, we introduce a xylose catabolic pathway that directly flows into the TCA cycle. As a result, we can produce 4.09 g L
−1
cis
,
cis
-muconic acid using the PMPE
Escherichia coli
strain with high yield (0.31 g g
−1
of glucose) and produce
l
-tyrosine with 64% of the theoretical yield. The PMPE strategy can contribute to the development of clean processes for producing various valuable chemicals from lignocellulosic resources.
In lignocellulose biomass, microbes prefer consuming glucose over xylose, which affects target compound production. Here, the authors achieve simultaneous utilization of glucose and xylose for target chemical production and cell growth, respectively, and realize high-level production of shikimate pathway derivatives.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ E coli
/ Escherichia coli - growth & development
/ Escherichia coli - metabolism
/ Escherichia coli Proteins - genetics
/ Escherichia coli Proteins - metabolism
/ Glucose
/ Humanities and Social Sciences
/ Metabolic Networks and Pathways - genetics
/ Pentose
/ Propylene Glycol - metabolism
/ Science
/ Sorbic Acid - analogs & derivatives
/ Sugar
/ Tyrosine
/ Xylose
