期刊
ACS SYNTHETIC BIOLOGY
卷 7, 期 2, 页码 748-751出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssynbio.7b00355
关键词
galactose-inducible promoter; Saccharomyces species; autoinducible expression; promoter library; metabolic engineering; synthetic biology
资金
- University of Queensland International Postgraduate Research Scholarship
- Queensland Government Smart Futures Fellowship
- Queensland Government Accelerate Fellowship
- Novo Nordisk Fonden [NNF10CC1016517] Funding Source: researchfish
- NNF Center for Biosustainability [Quantitative Modeling of Cell Metab] Funding Source: researchfish
The GAL promoters are applied in metabolic engineering and synthetic biology to control gene expression in the budding yeast Saccharomyces cerevisiae. In ga1800 background strains, they show diauxie-inducible expression, a feature beneficial in metabolic pathway optimization. However, only a limited number of GAL promoters have been characterized and are available for engineering purposes. Multiple uses of the same promoters can result in genetic instability in engineered strains due to homologous recombination. Here, 11 GALI/2 promoters from other Saccharomyces species were isolated and characterized in S. cerevisiae. They exhibited diauxie-inducible expression patterns with low strength in exponential growth phase and induction in the ethanol growth phase. These promoters represent an expansion to the collection of GAL promoters available for genetic engineering in S. cerevisiae, including an increased diversity of expression levels. This provides the capacity for increased numbers of genetic manipulations with a lower risk of genetic instability.
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