摘要:
An object of the present invention is to provide: a novel gene (polynucleotide) encoding an FAD-conjugated glucose dehydrogenase having excellent properties that it has excellent reactivity to glucose, excellent thermal stability, and excellent substrate-recognition performance and also has a low activity for maltose; a process for the production of the enzyme using a transformant cell transfected with the gene; and a method for the determination of glucose, a reagent composition for use in the determination of glucose, a biosensor for use in the determination of glucose and others, each characterized by using the enzyme obtained. The invention relates to a polynucleotide encoding an FAD-conjugated glucose dehydrogenase, comprising a polypeptide containing an amino acid sequence: X1-X2-X3-X4-X5-X6 (wherein X1 and X2 independently represent an aliphatic amino acid residue; X3 and X6 independently represent a branched amino acid residue; and X4 and X5 independently represent a heterocyclic amino acid residue or an aromatic amino acid residue); and others.
摘要:
An object of the present invention is to provide: a novel gene (polynucleotide) encoding an FAD-conjugated glucose dehydrogenase having excellent properties that it has excellent reactivity to glucose, excellent thermal stability, and excellent substrate-recognition performance and also has a low activity for maltose; a process for the production of the enzyme using a transformant cell transfected with the gene; and a method for the determination of glucose, a reagent composition for use in the determination of glucose, a biosensor for use in the determination of glucose and others, each characterized by using the enzyme obtained. The invention relates to a polynucleotide encoding an FAD-conjugated glucose dehydrogenase, comprising a polypeptide containing an amino acid sequence: X1-X2-X3-X4-X5-X6 (wherein X1 and X2 independently represent an aliphatic amino acid residue; X3 and X6 independently represent a branched amino acid residue; and X4 and X5 independently represent a heterocyclic amino acid residue or an aromatic amino acid residue); and others.
摘要:
The present invention discloses a method of manufacturing porous granules, a porous granule obtained by the method, a lipid-containing granule and a method of manufacturing thereof, and a food containing the lipid-containing granules and a method of manufacturing thereof. The porous granule of the present invention is bigger than the granule manufactured by the spray drying method, has high solubility, is easily obtained (porous structure can be easily formed), and has enough hardness. In addition, drying time and drying cost can be reduced because an amount of water to be dried can be reduced. The porous granule can be obtained by mixing a powder whose solubility is at most 100 g per 100 mL of water at 20° C., with water and drying a mixture under reduced pressure to obtain the porous granules having loose bulk density of at least 0.30 g/mL, having porous structure, and capable of absorbing lipids.
摘要:
Disclosed herein are a gene (polynucleotide) encoding an FAD-conjugated glucose dehydrogenase which can be characterized by reactivity to glucose, thermal stability, substrate-recognition performance, and low activity for maltose; a process for the production of the enzyme using a transformant cell transfected with the gene; a method for the determination of glucose; a reagent composition for use in the determination of glucose; and a biosensor for use in the determination of glucose. An embodiment is a polynucleotide encoding an FAD-conjugated glucose dehydrogenase, comprising a polypeptide whose amino acid sequence comprises X1-X2-X3-X4-X5-X6, wherein X1 and X2 independently represent an aliphatic amino acid residue; X3 and X6 independently represent a branched amino acid residue; and X4 and X5 independently represent a heterocyclic amino acid residue or an aromatic amino acid residue.
摘要:
Disclosed herein are a gene (polynucleotide) encoding an FAD-conjugated glucose dehydrogenase which can be characterized by reactivity to glucose, thermal stability, substrate-recognition performance, and low activity for maltose; a process for the production of the enzyme using a transformant cell transfected with the gene; a method for the determination of glucose; a reagent composition for use in the determination of glucose; and a biosensor for use in the determination of glucose. An embodiment is a polynucleotide encoding an FAD-conjugated glucose dehydrogenase, comprising a polypeptide whose amino acid sequence comprises X1-X2-X3-X4-X5-X6, wherein X1 and X2 independently represent an aliphatic amino acid residue; X3 and X6 independently represent a branched amino acid residue; and X4 and X5 independently represent a heterocyclic amino acid residue or an aromatic amino acid residue.
摘要:
The present invention provides members that produce on a large scale a coenzyme-linked glucose dehydrogenase which has excellent substrate-recognizing ability toward glucose while providing low action on maltose. The present invention relates to a polynucleotide encoding a soluble coenzyme-linked glucose dehydrogenase that catalyzes the oxidation of glucose in the presence of an electron acceptor and has an activity toward maltose of 5% or lower; a polypeptide encoded by the nucleotide sequence of the polynucleotide; a recombinant vector carrying the polynucleotide; a transformed cell produced using the recombinant vector; a method for producing a polypeptide comprising culturing the transformed cell and collecting from the cultivated products a polypeptide that links to FAD to exert the glucose dehydration activity; a method for determination of glucose using the polypeptide; a reagent composition for determination of glucose; and a biosensor.
摘要:
[Object] To provide an FAD-conjugated glucose dehydrogenase having a higher specificity for glucose.[Means for Resolution] A modified glucose dehydrogenase (GLD) which includes a substitution of at least one amino acid residue selected from the group consisting of amino acid residues at positions 37, 69, 72, 73, 76, 78, 102, 217, 228, 240, 356, 407, 424, 437, 527, and 530 in an amino acid sequence of a wild-type FAD-conjugated glucose dehydrogenase (GLD) represented by SEQ ID NO: 1, and has a decreased ratio of activity for xylose/activity for glucose as compared with the wild-type GLD; a polynucleotide encoding the modified GLD; a recombinant vector containing the polynucleotide; a transformed cell produced by using the recombinant vector; etc.
摘要翻译:提供对葡萄糖具有较高特异性的FAD-缀合的葡萄糖脱氢酶。 [解决方法]一种修饰的葡萄糖脱氢酶(GLD),其包括至少一个氨基酸残基的取代,所述氨基酸残基选自第37,69,72,73,76,78,102,217, 在由SEQ ID NO:1表示的野生型FAD-缀合的葡萄糖脱氢酶(GLD)的氨基酸序列中的228,240,356,407,424,473,527和530,并且具有降低的 与野生型GLD相比,葡萄糖的木糖/活性; 编码经修饰的GLD的多核苷酸; 含有多核苷酸的重组载体; 通过使用重组载体产生的转化细胞; 等等
摘要:
The present invention provides a microorganism-derived soluble coenzyme-binding glucose dehydrogenase which catalyzes a reaction for oxidizing glucose in the presence of an electron acceptor, has an activity to maltose as low as 5% or less, and is inhibited by 1,10-phenanthroline. The invention also provides a method for producing the coenzyme-binding glucose dehydrogenase, and a method and a reagent for measuring employing the coenzyme-binding glucose dehydrogenase. According to the invention, the coenzyme-binding glucose dehydrogenase can be applied to an industrial field, and a use becomes possible also in a material production or analysis including a method for measuring or eliminating glucose in a sample using the coenzyme-binding glucose dehydrogenase as well as a method for producing an organic compound. It became also possible to provide a glucose sensor capable of accurately measuring a blood sugar level. Therefore, it became possible to provide an enzyme having a high utility, such as an ability of being used for modifying a material in the fields of pharmaceuticals, clinical studies and food products.
To provide a glucose dehydrogenase with high thermal stability to be used in blood sugar measurement.
[Solution to Problem to problem]
A modified glucose dehydrogenase with an excellent property of high thermal stability that can be obtained by modifying some of amino acids constituting a protein such as a wild-type glucose dehydrogenase, a polynucleotide encoding the enzyme, a method for manufacturing the enzyme, a method for measuring glucose using the enzyme, a measuring reagent composition and a biosensor, and methods for manufacturing the measuring reagent composition and the biosensor.
摘要:
The present invention provides a microorganism-derived soluble coenzyme-binding glucose dehydrogenase which catalyzes a reaction for oxidizing glucose in the presence of an electron acceptor, has an activity to maltose as low as 5% or less, and is inhibited by 1,10-phenanthroline. The invention also provides a method for producing the coenzyme-binding glucose dehydrogenase, and a method and a reagent for measuring employing the coenzyme-binding glucose dehydrogenase, According to the invention, the coenzyme-binding glucose dehydrogenase can be applied to an industrial field, and a use becomes possible also in a material production or analysis including a method for measuring or eliminating glucose in a sample using the coenzyme-binding glucose dehydrogenase as well as a method for producing an organic compound. It became also possible to provide a glucose sensor capable of accurately measuring a blood sugar level. Therefore, it became possible to provide an enzyme having a high utility, such as an ability of being used for modifying a material in the fields of pharmaceuticals, clinical studies and food products.