生物技术通报 ›› 2017, Vol. 33 ›› Issue (1): 135-140.doi: 10.13560/j.cnki.biotech.bull.1985.2017.01.015

• 研究报告 • 上一篇    下一篇

3,4-二羟基扁桃酸在大肠杆菌中的生物合成

李晓林1, 2, 周威2, 庄以彬2, 路福平1, 殷华2   

  1. 1. 天津科技大学生物工程学院,天津 300457;
    2. 中国科学院天津工业生物技术研究所,天津300308
  • 收稿日期:2016-03-23 出版日期:2017-01-25 发布日期:2017-01-19
  • 作者简介:李晓林,女,硕士研究生,研究方向:天然产物合成生物学,E-mail:li_xl@tib.cas.cn;周威为本文并列第一作者
  • 基金资助:
    国家自然科学基金资助项目(31400026)

Biosynthesis of 3,4-dihydroxymandelic Acid in an Engineered Escherichia coli Strain

LI Xiao-lin1, 2, ZHOU Wei2, ZHUANG Yi-bin2, LU Fu-ping1, YIN Hua2   

  1. 1. School of Biological Engineering,Tianjin University of Science & Technology,Tianjin 300457;
    2. Tianjin Institute of Industrial Biotechnology,Chinese Academy of Sciences,Tianjin 300308
  • Received:2016-03-23 Published:2017-01-25 Online:2017-01-19

摘要: 3,4-二羟基扁桃酸是许多药物和香料合成的重要中间体,具有较强的抗氧化和清除自由基的活性。旨在实现3,4-二羟基扁桃酸在大肠杆菌中的从头合成。通过在大肠杆菌MG1655/ΔA中过表达来源于天蓝色链霉菌(Streptomyces coelicolor)的对羟基扁桃酸合酶(HmaS)和大肠杆菌的羟化酶(HpaBC)基因,实现了以葡萄糖为原料生物合成3,4-二羟基扁桃酸;并经IPTG和蛋白诱导温度初步优化后,摇瓶发酵36 h 3,4-二羟基扁桃酸的产量达到240 mg/L。

关键词: 大肠杆菌, 3, 4-二羟基扁桃酸, 生物合成, 对羟基扁桃酸合酶(HmaS), 羟化酶(HpaBC)

Abstract: 3,4-dihydroxymandelic acid,an important pharmaceutical and spices intermediate,possesses strong antioxidative and radical scavenging activities. To achieve the de novo biosynthesis of 3,4-dihydroxymandelic acid in Escherichia coli,the genes of hydroxymandelate synthase(HmaS)from Streptomyces coelicolor and 4-hydroxyphenylacetate 3-hydroxylase(HpaBC)from E. coli were cloned into pTrcHisB and overexpressed in an engineered E. coli strain MG1655/ΔA. After induction of IPTG and optimization of the inducing temperature,the yield of 3,4-dihydroxymandelic acid reached 240 mg/L in shake flask after 36 hours fermentation,laying a foundation for the large-scale fermentation production of 3,4-dihydroxymandelic acid .

Key words: Escherichia coli, 3,4-dihydroxymandelic acid, biosynthesis, HmaS, HpaBC