DNA coding for a novel glucose dehydrogenase
First Claim
1. A recombinant vector comprising a DNA coding for an NADP-specific glucose dehydrogenase showing an NADP/NAD activity ratio of no lower than 300 derived from bacteria belonging to the genus Lactobacillus, which is selected from the group consisting of:
- (a) a polypeptide having the amino acid sequence of SEQ ID NO;
3;
(b) a polypeptide having an amino acid sequence which differs from SEQ ID NO;
3 solely by substitution, deletion, insertion and/or deletion of no more than 25 amino acid residues, wherein the polypeptide is capable of acting on glucose and NADP to form gluconolactone and NADPH; and
(c) a polypeptide having an amino acid sequence identity of at least 90% with the polypeptide of SEQ ID NO;
3, wherein the polypeptide is capable of acting on glucose and NADP to form gluconolactone and NADPH.
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Abstract
The invention relates to a glucose dehydrogenase showing an NADP/NAD activity ratio, namely the value obtained by dividing the enzyme activity value obtained by using NADP as a coenzyme by the enzyme activity value obtained by using NAD as a coenzyme, of not lower than 300, to a gene coding therefor, and to a transformant harboring that gene. The enzyme of the invention is very high in NADP specificity and can be suitably used, for example, for NADPH production, for coenzyme regeneration in enzymatic reduction reactions, and in biosensors for glucose concentration measurements.
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Citations
8 Claims
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1. A recombinant vector comprising a DNA coding for an NADP-specific glucose dehydrogenase showing an NADP/NAD activity ratio of no lower than 300 derived from bacteria belonging to the genus Lactobacillus, which is selected from the group consisting of:
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(a) a polypeptide having the amino acid sequence of SEQ ID NO;
3;(b) a polypeptide having an amino acid sequence which differs from SEQ ID NO;
3 solely by substitution, deletion, insertion and/or deletion of no more than 25 amino acid residues, wherein the polypeptide is capable of acting on glucose and NADP to form gluconolactone and NADPH; and(c) a polypeptide having an amino acid sequence identity of at least 90% with the polypeptide of SEQ ID NO;
3, wherein the polypeptide is capable of acting on glucose and NADP to form gluconolactone and NADPH. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification