Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 60, Issue 4, Pages 979-984Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf203256f
Keywords
tyrosol (2-(4-hydroxyphenyl)ethanol); Ehrlich pathway; metabolic engineering Escherichia coli
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Metabolic engineering was applied to the development of Escherichia coli capable of synthesizing tyrosol hydroxyphenyl)ethanol), an attractive phenolic compound with great industrial value, from glucose, a renewable carbon source. In this strain, tyrosine, which was supplied not only from the culture medium but also from the central metabolism, was converted into tyrosol via three steps: decarboxylation, amine oxidation, and reduction. The engineered strain synthesized both tyrosol and 4-hydroxyphenylacetate (4HPA), but disruption of the endogenous phenylacetaldehyde dehydrogenase gene shut off 4HPA production and improved the production of tyrosol as a sole product. The engineered mutant strain was capable of producing 0.5 mM tyrosol from 1% (w/v) glucose during a 48 h shake flask cultivation.
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