Mutant genes involved in improving ethanol productivity by ethanol fermentation and methods for producing ethanol using them

摘要

PROBLEM TO BE SOLVED: To provide a mutant gene involved in improvement of ethanol productivity in ethanol fermentation with yeast having a xylose-metabolizing ability, and a method for producing ethanol using the same. SOLUTION: A mutant gene encoding a mutant FPK1 protein having a consensus sequence in which a specific amino acid residue is replaced with another amino acid in a specific amino acid sequence, a mutant yeast having a xylose metabolic ability having the mutant gene, and the same. Provided is a method for producing ethanol, which comprises a step of culturing a mutant yeast in a medium containing xylose to carry out ethanol fermentation. [Selection diagram] Fig. 1