Enhancement of Farnesyl Diphosphate Pool as Direct Precursor of Sesquiterpenes Through Metabolic Engineering of the Mevalonate Pathway in Saccharomyces cerevisiae
Artikel i vetenskaplig tidskrift, 2010

The mevalonate pathway in the yeast Saccharomyces cerevisiae was deregulated in order to enhance the intracellular pool of farnesyl diphosphate (FPP), the direct precursor for the biosynthesis of sesquiterpenes. Overexpression of the catalytic domain of HMG1, both from the genome and plasmid, resulted in higher production of cubebol, a plant originating sesquiterpene, and increased squalene accumulation. Down-regulation of ERG9 by replacing its native promoter with the regulatable MET3 promoter, enhanced cubebol titers but simultaneous overexpression of tHMG1 and repression of ERG9 did not further improve cubebol production. Furtheremore, the concentrations of squalene and ergosterol were measured in the engineered strains. Unexpectedly, significant accumulation of squalene and restoring the ergosterol biosynthesis were observed in the ERG9 repressed strains transformed with the plasmids harboring cubebol synthase gene. This could be explained by a toxicity effect of cubebol, possibly resulting in higher transcription levels for the genes under control of MET3 promoter, which could lead to accumulation of squalene and ergosterol. Biotechnol. Bioeng. 2010;106: 86-96. (C) 2010 Wiley Periodicals, Inc.

YEAST SNF1

SYNTHASE

mevalonate pathway

TRANSCRIPTIONAL REGULATION

Saccharomyces cerevisiae

HIGH-LEVEL PRODUCTION

ACTIVATED PROTEIN-KINASE

SQUALENE SYNTHETASE

BIOSYNTHETIC-PATHWAY

CATALYTIC DOMAIN

sesquiterpene

squalene

HYDROXYMETHYLGLUTARYL-COA REDUCTASE

farnesyl diphosphate

metabolic engineering

ARTEMISIA-ANNUA

Författare

M. A. Asadollahi

University of Isfahan

Danmarks Tekniske Universitet (DTU)

J. Maury

Danmarks Tekniske Universitet (DTU)

Fluxome Sciences AS

M. Schalk

Firmenich SA

A. Clark

Firmenich Inc.

Jens B Nielsen

Chalmers, Kemi- och bioteknik, Livsvetenskaper, Systembiologi

Biotechnology and Bioengineering

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

Vol. 106 86-96

Ämneskategorier

Biologiska vetenskaper

Styrkeområden

Livsvetenskaper och teknik

DOI

10.1002/bit.22668