Abstract
Phenylpropanoids are widely used in food supplements, pharmaceuticals, and cosmetics with diverse benefits to human health. Trans-cinnamic acid or p-coumaric acid is usually used as the starting precursor to produce phenylpropanoids. Synthetic bioengineering of microbial cell factories offers a sustainable and flexible alternative method for obtaining these compounds. In this study, a constitutive expression system consisting of Rhodotorula glutinis phenylalanine/tyrosine ammonia lyase was developed to produce a phenylpropanoic acid precursor in Escherichia coli. To improve trans-cinnamic acid and p-coumaric acid production, BioBrick optimization was investigated, causing a 7.2- and 14.2-fold increase in the yield of these compounds, respectively. The optimum strain was capable of de novo producing 78.81 mg/L of trans-cinnamic acid and 34.67 mg/L of p-coumaric acid in a shake flask culture. The work presented here paves the way for the development of a sustainable and economical process for microbial production of a phenylpropanoic acid precursor.
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Liang, Jl., Guo, L., Sun, P. et al. A novel process for obtaining phenylpropanoic acid precursor using Escherichia coli with a constitutive expression system. Food Sci Biotechnol 25, 795–801 (2016). https://doi.org/10.1007/s10068-016-0134-3
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DOI: https://doi.org/10.1007/s10068-016-0134-3