Abstract: This invention is intended to improve the ethanol fermentation ability of a yeast strain having xylose-metabolizing ability with the use of a mutant gene encoding a mutant protein comprising a consensus sequence comprising a substitution of amino acid in the 30th position in SEQ ID NO: 1, amino acid in the 43rd position in SEQ ID NO: 4, and amino acid in the 31st position in SEQ ID NO: 7 with other amino acid residues.

Abstract: This invention is intended to improve the ethanol fermentation ability of a yeast strain having xylose-metabolizing ability with the use of a mutant gene encoding a mutant protein comprising a consensus sequence comprising a substitution of amino acid in the 30th position in SEQ ID NO: 1, amino acid in the 43rd position in SEQ ID NO: 4, and amino acid in the 31st position in SEQ ID NO: 7 with other amino acid residues.

Abstract: This invention is intended to improve the ethanol fermentation ability of a yeast strain having xylose-metabolizing ability with the use of a mutant gene encoding a mutant protein comprising a consensus sequence comprising a substitution of amino acid in the 30th position in SEQ ID NO: 1, amino acid in the 43rd position in SEQ ID NO: 4, and amino acid in the 31st position in SEQ ID NO: 7 with other amino acid residues.

Abstract: Provided are excellent L-arabinose metabolic genes that function in yeasts. Provided is an L-arabinose metabolic gene cluster including an L-arabinose isomerase gene specified by a predetermined SEQ ID, an L-ribulokinase gene specified by a predetermined SEQ ID, and an L-ribulose-5-phosphate-4-epimerase gene specified by a predetermined SEQ ID.

Abstract: This invention is intended to improve the ethanol fermentation ability of a yeast strain having xylose-metabolizing ability with the use of a mutant gene encoding a mutant protein comprising a consensus sequence comprising a substitution of amino acid in the 30th position in SEQ ID NO: 1, amino acid in the 43rd position in SEQ ID NO: 4, and amino acid in the 31st position in SEQ ID NO: 7 with other amino acid residues.

Abstract: This invention is intended to improve the ethanol fermentation ability of a yeast strain having xylose-metabolizing ability with the use of a mutant gene encoding a mutant protein comprising a consensus sequence comprising a substitution of amino acid in the 30th position in SEQ ID NO: 1, amino acid in the 43rd position in SEQ ID NO: 4, and amino acid in the 31st position in SEQ ID NO: 7 with other amino acid residues.

Abstract: This invention is intended to improve the ethanol fermentation ability of a yeast strain having xylose-metabolizing ability with the use of a mutant gene encoding a mutant protein comprising a consensus sequence comprising a substitution of amino acid in the 30th position in SEQ ID NO: 1, amino acid in the 43rd position in SEQ ID NO: 4, and amino acid in the 31st position in SEQ ID NO: 7 with other amino acid residues.

Abstract: A stable transformant, in which a gene of interest is incorporated into the genome, is simply and efficiently produced. A method for producing a transformant, comprising a step of introducing into a host, linear genome-introduced nucleic acid fragment(s) comprising a gene of interest and a helper plasmid for transformation having a pair of homologous recombination sequences for incorporation of the linear genome-introduced nucleic acid fragment(s), and then selecting a transformant, in which the gene of interest is incorporated into the predetermined position in the host genome and the gene of interest is expressed therein.

Abstract: An acetic acid metabolizing ability of a recombinant yeast strain having xylose-metabolizing ability is to be improved. In such a recombinant yeast strain having xylose-metabolizing ability, the acetaldehyde dehydrogenase gene has been introduced and a gene encoding NADH dehydrogenase involved in reoxidation of cytoplasmic NADH on the mitochondrial outer membrane has been suppressed.

Abstract: A eukaryotic cell having xylose utilization ability. Provided is a protein that has xylose isomerase activity and has an amino acid sequence including, when aligned with an amino acid sequence expressed by SEQ ID NO:1, the 1st to 6th motifs expressed respectively by SEQ ID NOs:2 to 7 from the N-terminus side in the order described, and having, in place of asparagine (N) in an amino acid sequence of the 6th motif, another amino acid.

Abstract: The invention is intended to metabolize acetic acid in a medium at the time of culture, such as ethanol fermentation by yeast, and to reduce acetic acid concentration. Specifically, the invention relates to a recombinant yeast resulting from introduction of the acetaldehyde dehydrogenase gene (EC 1.2.1.10) and regulation of an enzyme involved with trehalose accumulation.

Abstract: This invention is aimed at improving an ethanol fermentation ability of a recombinant yeast strain having an ability of assimilating pentose, such as xylose or arabinose. The recombinant yeast strain haying an ability of assimilating pentose is obtained by lowering activity of a gene involved in upstream of glyceraldehyde-3-phosphate in the Embden-Meyerhof pathway.

Abstract: An acetic acid metabolizing ability of a recombinant yeast strain having xylose-metabolizing ability is to be improved. In such a recombinant yeast strain having xylose-metabolizing ability, the acetaldehyde dehydrogenase gene has been introduced and a gene encoding NADH dehydrogenase involved in reoxidation of cytoplasmic NADH on the mitochondrial outer membrane has been suppressed.

Abstract: A eukaryotic cell having xylose utilization ability. Provided is a protein that has xylose isomerase activity and has an amino acid sequence including, when aligned with an amino acid sequence expressed by SEQ ID NO:1, the 1st to 6th motifs expressed respectively by SEQ ID NOs:2 to 7 from the N-terminus side in the order described, and having, in place of asparagine (N) in an amino acid sequence of the 6th motif, another amino acid.

Abstract: A eukaryotic cell having xylose utilization ability. Provided is a protein that has xylose isomerase activity and has an amino acid sequence including, when aligned with an amino acid sequence expressed by SEQ ID NO:1, the 1st to 6th motifs expressed respectively by SEQ ID NOs:2 to 7 from the N-terminus side in the order described, and having, in place of asparagine (N) in an amino acid sequence of the 6th motif, another amino acid.

Abstract: The invention is intended to improve xylose assimilation ability and ethanol fermentation ability in a xylose-assimilating yeast into which a xylose isomerase gene has been introduced. The amount of NADH produced by the recombinant yeast into which the xylose isomerase gene had been introduced as a result of the enzymatic reaction of acetohydroxy acid reductoisomerase is lowered.

Abstract: The invention is intended to improve xylose assimilation ability and ethanol fermentation ability in a xylose-assimilating yeast into which a xylose isomerase gene has been introduced. The amount of NADH produced by the recombinant yeast into which the xylose isomerase gene had been introduced as a result of the enzymatic reaction of acetohydroxy acid reductoisomerase is lowered.

Abstract: A eukaryotic cell having xylose utilization ability. Provided is a protein that has xylose isomerase activity and has an amino acid sequence including, when aligned with an amino acid sequence expressed by SEQ ID NO:1, the 1st to 6th motifs expressed respectively by SEQ ID NOs:2 to 7 from the N-terminus side in the order described, and having, in place of asparagine (N) in an amino acid sequence of the 6th motif, another amino acid.

Abstract: The invention is intended to metabolize acetic acid and to lower acetic acid concentration in a medium at the time of xylose assimilation and ethanol fermentation by a yeast strain having xylose-metabolizing ability. The method for producing ethanol comprises a step of culturing recombinant yeast strains resulting from introduction of a xylose isomerase gene and an acetaldehyde dehydrogenase gene into a medium containing xylose, so as to perform ethanol fermentation.

Abstract: Thermophilic microorganisms having a deodorizing ability for short chain fatty acids, which are the offensive odor components, are provided. Disclosed are thermophilic microorganisms having a deodorizing ability for short chain fatty acids, which belong to Bacillus licheniformis.