Production of farnesene and santalene by Saccharomyces cerevisiae using fed-batch cultivations with RQ-controlled feed

Stefan Tippmann, Gionata Scalcinati, Verena Siewers, Jens Nielsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Terpenes have various applications as fragrances, cosmetics and fuels. One of the most prominent examples is the sesquiterpene farnesene, which can be used as diesel substitute in its hydrogenated form farnesane. Recent metabolic engineering efforts have enabled efficient production of several terpenes in Saccharomyces cerevisiae and Escherichia coli. Plant terpene synthases take on an essential function for sesquiterpene production as they catalyze the specific conversion of the universal precursor farnesyl diphosphate (FPP) to the sesquiterpene of interest and thereby impose limitations on the overall productivity. Using farnesene as a case study, we chose three terpene synthases with distinct plant origins and compared their applicability for farnesene production in the yeast S. cerevisiae. Differences regarding the efficiency of these enzymes were observed in shake flask cultivation with maximal final titers of 4 mg/L using α-farnesene synthase from Malus domestica. By employing two existing platform strains optimized for sesquiterpene production, final titers could be raised up 170 mg/L in fed-batch fermentations with RQ-controlled exponential feeding. Based on these experiments, the difference between the selected synthases was not significant. Lastly, the same fermentation setup was used to compare these results to production of the fragrance sesquiterpene santalene, and almost equivalent titers were obtained with 163 mg/L, using the highest producing strain expressing a santalene synthase from Clausena lansium. However, a reduction of the product yield on biomass by 50% could indicate a higher catalytic efficiency of the farnesene synthase.
Original languageEnglish
JournalBiotechnology and Bioengineering
Volume113
Issue number1
Pages (from-to)72-81
Number of pages10
ISSN0006-3592
DOIs
Publication statusPublished - 2016

Keywords

  • Isoprenoids
  • Terpene synthases
  • Biofuels
  • Yeast
  • Metabolic engineering
  • Fed-batch

Fingerprint Dive into the research topics of 'Production of farnesene and santalene by <i>Saccharomyces cerevisiae</i> using fed-batch cultivations with <i>RQ-</i>controlled feed'. Together they form a unique fingerprint.

Cite this