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Enabling Heterologous Synthesis of Lupulones in the Yeast Saccharomyces cerevisiae

  • Xiaojia Guo
  • Hongwei Shen
  • Yuxue Liu
  • Qian Wang
  • Xueying Wang
  • Chang Peng
  • Wujun Liu
  • Zongbao K. ZhaoEmail author
Article
  • 77 Downloads

Abstract

Lupulones, naturally produced by glandular trichomes of hop (Humulus lupulus), are prenylated phloroglucinol derivatives that contribute the bitter flavor of beer and demonstrate antimicrobial and anticancer activities. It is appealing to develop microbial cell factories such that lupulones may be produced via fermentation technology in lieu of extraction from limited plant resources. In this study, the yeast Saccharomyces cerevisiae transformants harboring a synthetic lupulone pathway that consisted of five genes from hop were constructed. The transformants accumulated several precursors but failed to accumulate lupulones. Overexpression of 3-hydroxy-3-methyl glutaryl co-enzyme A reductase, the key enzyme in precursor formation in the mevalonate pathway, also failed to achieve a detectable level of lupulones. To decrease the consumption of the precursors, the ergosterol biosynthesis pathway was chemically downregulated by a small molecule ketoconazole, leading to successful production of lupulones. Our study demonstrated a combination of molecular biology and chemical biology to regulate the metabolism for heterologous production of lupulones. The strategy may be valuable for future engineering microbial process for other prenylated natural products.

Keywords

Chemical genetics Lupulones Metabolic engineering Mevalonate pathway Saccharomyces cerevisiae 

Notes

Acknowledgments

The authors thank Prof. Guodong Wang of Institute of Genetics and Developmental Biology, CAS, for provision of strains and plasmids, and Prof. Fan Yang of Dalian Polytechnic University for provision of hop samples.

Funding Information

This project is supported by National Natural Science Foundation of China (Nos. 21721004; 51561145014) and Dalian Institute of Chemical Physics, CAS (No. DICP ZZBS201605).

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.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Division of BiotechnologyDalian Institute of Chemical Physics, Chinese Academy of SciencesDalianChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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