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Title: Redirection of the Glycolytic Flux Enhances Isoprenoid Production in Saccharomyces cerevisiae

Journal Article · · Biotechnology Journal
ORCiD logo [1];  [2];  [1];  [1];  [3]; ORCiD logo [1]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Food Science and Human Nutrition and Carl R. Woese Institute for Genomic Biology
  2. Univ. of Illinois, Urbana-Champaign, IL (United States). Carl R. Woese Institute for Genomic Biology; Korea Univ., Seoul (Korea). Dept. of Biotechnology
  3. Korea Univ., Seoul (Korea). Dept. of Biotechnology

Abstract Sufficient supply of reduced nicotinamide adenine dinucleotide phosphate (NADPH) is a prerequisite of the overproduction of isoprenoids and related bioproducts in Saccharomyces cerevisiae . Although S. cerevisiae highly depends on the oxidative pentose phosphate (PP) pathway to produce NADPH, its metabolic flux toward the oxidative PP pathway is limited due to the rigid glycolysis flux. To maximize NADPH supply for the isoprenoid production in yeast, upper glycolytic metabolic fluxes are reduced by introducing mutations into phosphofructokinase (PFK) along with overexpression of ZWF1 encoding glucose‐6‐phosphate (G6P) dehydrogenase. The PFK mutations (Pfk1 S724D and Pfk2 S718D) result in less glycerol production and more accumulation of G6P, which is a gateway metabolite toward the oxidative PP pathway. When combined with the PFK mutations, overexpression of ZWF1 caused substantial increases of [NADPH]/[NADP + ] ratios whereas the effect of ZWF1 overexpression alone in the wild‐type strain is not noticeable. Also, the introduction of ZWF1 overexpression and the PFK mutations into engineered yeast overexpressing acetyl‐CoA C‐acetyltransferase ( ERG10 ), truncated HMG‐CoA reductase isozyme 1 ( tHMG1 ), and amorphadiene synthase ( ADS ) leads to a titer of 497 mg L –1 of amorphadiene (3.7‐fold over the parental strain). These results suggest that perturbation of upper glycolytic fluxes, in addition to ZWF1 overexpression, is necessary for efficient NADPH supply through the oxidative PP pathway and enhanced production of isoprenoids by engineered S. cerevisiae .

Research Organization:
Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE
Grant/Contract Number:
SC0018420; DE‐SC0018420
OSTI ID:
1559936
Alternate ID(s):
OSTI ID: 1562316
Journal Information:
Biotechnology Journal, Vol. none, Issue none; ISSN 1860-6768
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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