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        A Novel Process for Obtaining Phenylpropanoic Acid Precursor Using Escherichia coli with a Constitutive Expression System

        Jing-long Liang,Liqiong Guo,Ping Sun,Binghua Jiang,Junfang Lin,Weixiong Guo,Hua Wan 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.3

        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 transcinnamic 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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