期刊文献+

大肠杆菌异源合成甲羟戊酸的适配性优化

Adaptability optimization of mevalonate biosynthesized in Escherichia coli
原文传递
导出
摘要 [目的]对甲羟戊酸在大肠杆菌中的生物合成进行适配性优化。[方法]将来源于粪肠球菌的甲羟戊酸合成途径基因mvaE和mvaS引入大肠杆菌中,构建大肠杆菌甲羟戊酸合成体系。继而通过比较不同的表达系统和不同的RBS序列探究甲羟戊酸合成的最佳条件。接下来,考虑到乙酰辅酶A是连接大肠杆菌细胞代谢途径和外源甲羟戊酸合成途径的桥梁,通过加强乙酰CoA的代谢通量来继续提高甲羟戊酸的产量。[结果]采用pTrc99A载体,8000 au的RBS强度下,大肠杆菌甲羟戊酸合成体系的效率最高,产量达到20.5 mmol/L;通过加强乙酰CoA的代谢通量,甲羟戊酸的产量继续提高到26 mmol/L。[结论]获得一株高产甲羟戊酸的大肠杆菌菌株,该菌株可用于合成甲羟戊酸,也可作为一平台菌株用于其他萜类化合物的生物合成。 [Objective]To adaptively optimize mevalonate biosynthesis system in E.coli.[Method]Mevalonate biosynthesis system is adaptively optimized through comparing different expression systems and different RBS sequences.Next,in consideration of acetyl-CoA is the bridge of E.coli native metabolic pathways and exogenous mevalonate biosynthesis pathway,mevalonate production is further optimized by enhancing the metabolic flux of acetyl-CoA.[Result]The optimized condition for mevalonate biosynthesis is employing pTrc99A plasmid and introducing 8000 au RBS sequence,resulting in 20.5 mmol/L mevalonate production.The mevalonate production further reaches 26 mmol/L by enhancing the metabolic flux of acetyl-CoA.[Conclusion]A high-yielding E.coli strain for mevalonate production is obtained,and this strain can be used as a platform for the biosynthesis of other terpenoids.
作者 杨李阳 苗莉云 弓强 彭晓夏 郭建全 YANG Li-yang;MIAO Li-yun;GONG Qiang;PENG Xiao-xia;GUO Jian-quan(School of Basic Medical Sciences,Shanxi University of Chinese Medicine,Jinzhong 030619,China)
出处 《生物技术》 CAS 2020年第3期219-225,284,共8页 Biotechnology
基金 山西省自然科学青年面上基金项目(201801D221396) 山西省高等学校科技创新项目(2019L0726) 山西中医药大学博士科研启动基金项目(2016BK04)。
关键词 甲羟戊酸 大肠杆菌 生物合成 乙酰辅酶A mevalonate Escherichia coli biosynthesis acetyl-CoA
  • 相关文献

参考文献2

二级参考文献19

  • 1Wolfe AJ. The acetate switch. Microbiology and Molecular Biology Reviews, 2005, 69 : 12-50.
  • 2Winzeler EA, Shoemaker DD, Astromoff A, Liang H Anderson, K Andre B, Bangham R, Benito R, Boeke JD, Bussey H, Chu AM, Connelly C, Davis K, Dietrich F, Dow SW, E1 Bakkoury M, Foury F, Friend SH, Gentalen E, Giaever G, Hegemann JH, Jones T, Laub M, Liao H, Liebundguth N, Lockhart DJ, Lucau-Danila A, Lussier M, M'Rabet N, Menard P, Mittmann M, Pal C, Rebischung C, Revueha JL, Riles L, Roberts C J, Ross-MacDonald P, Scherens B, Snyder M, Sookhai-Mahadeo S, Storms RK, Veronneau S, Voet M, Volckaert G, Ward TR, Wysocki R, Yen GS, Yu K, Zimmermann K, Philippsen P, Johnston M, Davis RW.. Functional characterization of the S. cerevisiae genome by gene deletion and parallel analysis. Science, 1999, 285:901-906.
  • 3Paradise EM, Kirby J, Ro DK, Keasing JD. Engineering of the pyruvate dehydrogenase bypass in Saccharomyces cerevisiae for high-level production of isoprenoids. Metabolic Engineering, 2007, 9 : 160-168.
  • 4Asadollahi MA, Maury J, Patil KR, Schalk M, Clark A, Nielsen J. Enhancing sesquiterpene production in Saccharomyces cerevisiae through in silico driven metabolic engineering. Metabolic Engineering, 2009.
  • 5Engels B, Dahm P, Jennewein S. Metabolic engineering of taxadiene biosynthesis in yeast as a first step towards Taxol (Paclitaxel) production. Metabolic Engineering, 2008, 10:201-206.
  • 6Akamatsu S, Kamiya H, Yamashita N, Motoyoshi T, Goto-Yamamoto N, Ishikawa T, Okazaki N, Nishimura A. Effects of aldehyde dehydrogenase and acetyl-CoA synthetase on acetate formation in sake mash. Journal Bioscience Bioengineering, 2000, 90:555-560.
  • 7Gao L, Chiou W, Tang H, Cheng XH, Camp HS, Burns DJ. Simultaneous quantification of malonyl-CoA and several other short-chain acyl-CoAs in animal tissues by ion-pairing reversed-phase HPLC/MS. Journal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences, 2007, 853:303-313.
  • 8vandenBerg MA, deJongGubbels P, Kortland C J, vanDijken JP, Pronk JT, Steensma HY. The two acetyl- coenzyme A synthetases of Saccharomyces cerevisiae differ with respect to kinetic properties and transcriptional regulation. Journal of Biological Chemistry 1996, 271: 28953 -28959.
  • 9Sato K, Yoshida Y, Hirahara T, Ohba T. On-line measurement of intracellular ATP of Saccharomyces cerevisiae and pyruvate during sake mashing. Journal Bioscience Bioengineering, 2000, 90:294-301.
  • 10Postgate J. Viability measurements and the survival of microbes under minimum stress. Advances Microbial Physiology, 1967, 1.

共引文献21

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部