Biosynthesis of (S)-Equol from Soy Whey by Metabolically Engineered Escherichia coli

文献类型： 外文期刊

第一作者： Wang, Zhe

作者： Wang, Zhe;Li, Xiaonan;Azi, Fidelis;Dai, Yiqiang;Xu, Zhuang;Yu, Lijun;Zhou, Jianzhong;Xia, Xiudong;Wang, Zhe;Dai, Yiqiang;Dong, Mingsheng;Li, Xiaonan;Zhou, Jianzhong;Xia, Xiudong;Azi, Fidelis;Zhou, Jianzhong;Xia, Xiudong;Zhou, Jianzhong;Xia, Xiudong

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关键词： soy whey; (S)-equol; daidzin; metabolic engineering; Escherichia coli

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.1； 五年影响因子：6.3 ）

ISSN： 0021-8561

年卷期： 2023 年 71 卷 15 期

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收录情况： SCI

摘要： (S)-Equol is one of the most bioactive metabolites of the isoflavones with immense nutritional and pharmaceutical value. Soy whey is the major liquid byproduct of the soy product processing industries that is rich in nutrients and (S)-equol biosynthetic precursor daidzin. However, it is usually disposed into the sewage, causing high environmental contamination. Herein, we constructed a recombinant Escherichia coli for the biosynthesis of (S)-equol from soy whey. First, we evaluated daidzin-specific transporters and optimized the anaerobically induced P(nar )in the (S)-equol biosynthesis cassette to produce (S)-equol from daidzin. Then, sucrase and a-galactosidase were co-expressed to confer sucrose, stachyose, and raffinose utilization capacity on E. coli. Meanwhile, EIIBCA(glc) was inactivated to eliminate the daidzin transport inhibition induced by glucose. Finally, combining these strategies and optimizing the fermentation conditions, the optimal strain produced 91.5 mg/L of (S)-equol with a yield of 0.96 mol/ mol substrates in concentrated soy whey. Overall, this new strategy is an attractive route to broaden the applications of soy whey and achieve the eco-friendly production of (S)-equol.

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[1]Biosynthesis of (S)-Equol from Soy Whey by Metabolically Engineered Escherichia coli. Wang, Zhe,Li, Xiaonan,Azi, Fidelis,Dai, Yiqiang,Xu, Zhuang,Yu, Lijun,Zhou, Jianzhong,Xia, Xiudong,Wang, Zhe,Dai, Yiqiang,Dong, Mingsheng,Li, Xiaonan,Xu, Zhuang,Zhou, Jianzhong,Xia, Xiudong,Zhou, Jianzhong,Xia, Xiudong,Zhou, Jianzhong,Xia, Xiudong. 2023

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