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Applied Microbiology and Biotechnology

, Volume 103, Issue 8, pp 3511–3520 | Cite as

Yarrowia lipolytica construction for heterologous synthesis of α-santalene and fermentation optimization

  • Dan Jia
  • Shuo Xu
  • Jie Sun
  • Chuanbo Zhang
  • Dashuai Li
  • Wenyu LuEmail author
Applied genetics and molecular biotechnology

Abstract

Sandalwood oil is a valuable resource derived from Santalum album. It has antibacterial, cosmetic, and sedative effects. α-Santalene is the precursor of α-santalol, the main component of sandalwood oil. Yarrowia lipolytica is an oleaginous yeast, which has been metabolically engineered to produce valuable compounds such as terpenoids and biofuel. This study presents a method for the heterologous synthesis of α-santalene by Y. lipolytica. Using Y. lipolytica ATCC 201249, a codon-optimized plant-origin α-santalene synthase (STS) was integrated into the genome, and a yield of 5.19 mg/L α-santalene was obtained after fermentation. Upstream genes in the MVA pathway (ERG8, ERG10, ERG12, ERG13, ERG19, ERG20, HMG1, and tHMG1) were overexpressed, and we found that the key genes ERG8, HMG1, and tHMG1 can increase the supply of FPP and the yield of α-santalene. ERG8 and HMG1 were overexpressed in multiple-copy formats, and the plasmid pERG8HMG1 and ERG8-HMG1 expression modules were optimized as single-copy and multiple-copy formats, respectively. The overexpression of single-copy plasmid pERG8HMG1 led to α-santalene yield of 13.31 mg/L. The optimal feeding strategy was determined by initial carbon source concentration optimizations and five feeding methods. Using 50 g/L glucose as the initial carbon source, maintaining the carbon source concentration at 5–20 g/L during the feeding process is most conducive to increased production. These results were verified in a 5-L fermenter by batch and fed-batch fermentation. The OD of fed-batch fermentation broth reached 79.09, and the production of α-santalene reached 27.92 mg/L; 5.38 times of the initial yield, without by-products farnesol and trans-α-bergamotene.

Keywords

α-Santalene Yarrowia lipolytica Synthetic biology Fermentation Sandalwood 

Notes

Funding information

This work was financially supported by the National Natural Science Foundation of China (No. 21878220).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary material

253_2019_9735_MOESM1_ESM.pdf (1 mb)
ESM 1 (PDF 1028 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Chemical Engineering and TechnologyTianjin UniversityTianjinPeople’s Republic of China
  2. 2.Key Laboratory of System Bioengineering, Ministry of EducationTianjin UniversityTianjinPeople’s Republic of China
  3. 3.SynBio Research Platform, Collaborative Innovation Center of Chemical Science and EngineeringTianjinPeople’s Republic of China

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