DNA encoding protein complementing yeast low temperature-sensitive fermentability

摘要

The present invention relates to a protein having the amino acid sequence represented by SEQ ID NO: 1, or a protein being capable of complementing the mutation exhibiting low-temperature-sensitive fermentability and having an amino acid sequence wherein one or more amino acid residues are added, deleted or substituted in the amino acid sequence represented by SEQ ID NO: 1; a gene which encodes said protein; and a gene which comprises DNA having the nucleotide sequence represented by SEQ ID NO: 1, or comprises DNA being capable of complementing the mutation exhibiting low-temperature-sensitive fermentability and having a nucleotide sequence wherein one or more DNAs are added, deleted or substituted in the nucleotide sequence represented by SEQ ID NO: 1. The present invention also relates to yeast belonging to the genus Saccharomyces and having low-temperature-sensitive fermentability which is characterized in that the above-mentioned gene on the chromosome is inactivated; dough containing said yeast; a process for making bread which comprises adding said yeast to dough; and a process for producing ethanol which comprises culturing said yeast in a medium, allowing ethanol to accumulate in the culture, and recovering ethanol from the culture.