Abstract
The removal of Gal80 protein by gene disruption turned into efficient GAL promoter-driven heterologous gene expression under anaerobic alcoholic fermentation of Saccharomyces cerevisiae. Using lipase B from Candida antarctica as a reporter, the relative strength of GAL10 promoter (P(GAL10) ) in Δgal80 mutant that does not require galactose as an inducer was compared to those of ADH1, PDC1, and PGK promoters, which have been known to work well anaerobically in actively fermenting yeast cells under high glucose concentration. P(GAL10) in the Δgal80 mutant showed 0.8-fold (ADH1), fourfold (PDC1), and 50-fold (PGK) in promoter strength.
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