Production of farnesene and santalene by Saccharomyces cerevisiae using fed-batch cultivations with RQ-controlled feed
Artikel i vetenskaplig tidskrift, 2016

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 4mg/L using -farnesene synthase from Malus domestica. By employing two existing platform strains optimized for sesquiterpene production, final titers could be raised up 170mg/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 163mg/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. Biotechnol. Bioeng. 2016;113: 72-81. (c) 2015 Wiley Periodicals, Inc.

fed-batch

v22

hxt genes

terpene synthases

biotechnology and bioengineering

yeast

plant

urts tge

coa reductase

identification

functional expression

biofuels

escherichia-coli

isoprenoids

sesquiterpenes

Biotechnology & Applied Microbiology

p2031

metabolic engineering

1980

overexpression

purification

(e)-beta-farnesene synthase

metabolism

Författare

Stefan Tippmann

Chalmers, Biologi och bioteknik, Systembiologi

Gionata Scalcinati

Chalmers, Biologi och bioteknik, Systembiologi

Verena Siewers

Chalmers, Biologi och bioteknik, Systembiologi

Jens B Nielsen

Chalmers, Biologi och bioteknik, Systembiologi

Biotechnology and Bioengineering

0006-3592 (ISSN) 1097-0290 (eISSN)

Vol. 113 72-81

Styrkeområden

Energi

Livsvetenskaper och teknik

Ämneskategorier

Mikrobiologi

Annan miljöbioteknik

DOI

10.1002/bit.25683

PubMed

26108688