Mutant ILV5 gene and use thereof

Food or edible material: processes – compositions – and products – Fermentation processes – Alcoholic beverage production or treatment to result in...

Reexamination Certificate

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C426S016000, C426S592000, C435S254200, C435S254110, C435S320100, C435S069100, C435S233000, C530S350000, C536S023740, C536S023100, C536S023200

Reexamination Certificate

active

08043638

ABSTRACT:
The present invention relates to a mutant acetohydroxy-acid reductoisomerase gene (mutant ILV5 gene) and use thereof, in particular, a brewery yeast for producing alcoholic beverages with superior flavor, alcoholic beverages produced with said yeast, and a method for producing said beverages. According to the method for producing alcoholic beverages of the present invention, because of reduction of the production of VDKs, especially DA, which are responsible for off-flavors in products, alcoholic beverages with superior flavor can be produced.

REFERENCES:
patent: 2007/020993 (2007-02-01), None
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Villa et al., “Control of Vicinal Diketone Production by Brewer's Yeast. I. Effects ofILV5andILV3Gene Amplification on Vicinal Diketone Production andILVEnzyme Activity” J. Am. Soc. Brew. Chem., vol. 53, No. 2, pp. 49-53, 1995.
Petersen et al., “The ILV5 Gene ofSaccharomyces cervisiaeis Highly Expressed” Nucleic Acids Res., vol. 14, No. 24, pp. 9631-9651, 1986.
Xie et al., “Cloning and Molecular Analysis of Two DifferentILV5Genes from a Brewing Strain ofSaccharomyces cerevisiae” Current Genetics, vol. 26, pp. 398-402, 1994.
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Dillemans Met al. (1987), J AM Soc. Brew. Chem. 45, pp. 81-84.
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Omura Fumihiko, (2008), Applied Microbiology and Biotechnology, vol. 78, No. 3, pp. 503-513.
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