Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (12): 2765.doi: 10.7503/cjcu20130339

• Organic Chemistry • Previous Articles     Next Articles

Fitness of Amorphadiene Production Functional Modules and Yeast Chassis

JIA Yun-Jing, ZHAO Juan, DING Ming-Zhu, YUAN Ying-Jin   

  1. Key Laboratory of Systems Bioengineering, Ministry of Education, Department of Pharmaceutical Engineering, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China
  • Received:2013-04-15 Online:2013-12-10 Published:2013-05-24

Abstract:

The key to construct artificial yeast cells to produce amorphadiene is the fitness of heterologous functional modules and chassis. The fitness of functional modules and chassis were studied by optimization of vectors, protein expression and promoters in the functional modules. Two functional modules constructed with centromere vector and episomal vector were introduced into two engineered chassis overexpressing key genes(a truncated 3-hydroxyl-3-methylglutaryl-CoA reductase gene tHMGR and farnesyl diphosphate synthase gene ERG20) in mevalonate(MEV) pathway, and the highest amorphadiene production was 11.2 mg/L in the artificial cell with better fitness. Amorphadiene synthase gene ADS and ERG20 were fused to construct fusion enzyme modules, and the fitness with the selected chassis were improved, resulted in a higher amorphadiene production of 17.5 mg/L. With promoter engineering(TDH3p, TEF1p, PGK1p) in the fusion enzyme modules, an artificial cell with a better fitness of functional module and chassis reached a 71.8 mg/L amorphadiene production.

Key words: Amorphadiene, Yeast chassis, Fusion enzyme, Functional module, Fitness

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