摘要:
The present disclosure provides multi-walled carbon nanotubes and carbon nanotubes (CNTs) displaying catalytic enzymes bound to the nanotube sidewalls and devices, such as electrodes, incorporating these catalytic enzyme-bound CNTs (cebCNTs).
摘要:
An objective of the present invention is to establish a technique for making it possible to immobilize an enzyme on an electrically conductive base material in a uniformly, high density, and constantly aligned orientation, for the purpose of constructing an enzyme electrode having improved electrode performance. An electrode having enzyme crystals immobilized thereon, the electrode being provided with an electrically conductive base material that can be connected to an external circuit and enzyme crystals that serve as an electrode catalyst, wherein the enzyme crystals are immobilized on the electrically conducive base material; a method for producing an electrode having enzyme crystals immobilized thereon; and a biological fuel cell and a biosensor which are provided with an electrode having enzyme crystals immobilized thereon.
摘要:
A modified pyrroloquinoline quinone glucose dehydrogenase that exhibits a high selectivity for glucose is provided. A modified pyrroloquinoline quinone glucose dehydrogenase is disclosed in which the amino acid residue G at Position 99 of a pyrroloquinoline quinone glucose dehydrogenase (PQQGDH) represented by SEQ ID NO: 1, or the amino acid residue G at Position 100 of the pyrroloquinoline quinone glucose dehydrogenase (PQQGDH) represented by SEQ ID NO: 3, is substituted by the amino acid sequence TGZN (where Z is SX, S, or N and X is any amino acid residue). The modified PQQGDH of the present invention may additionally comprise one or more mutations selected from the group consisting of Q192G, Q192A, or Q192S; L193X; E277X; A318X; Y367A, Y367F, or Y367W; G451C; and N452X (where X is any amino acid residue).
摘要:
The invention relates to novel PQQ-dependent soluble glucose dehydrogenases (sPQQGDH) which have an increased substrate specificity compared with the wild type, and also to methods for production and identification thereof.
摘要:
The invention provides a glucose dehydrogenase that is an extremely stable enzyme having a thermostability of 80° C. or more, and that does not substantially act upon saccharides other than glucose (e.g., having a reactivity of less than 3% with respect to maltose, galactose, and xylose). The invention also provides a method for producing such an enzyme, and a composition for quantifying glucose using such an enzyme.
摘要:
The invention relates to a plasmid characterized in that the plasmid comprises a DNA fragment containing a gene coding for an enzyme taking PQQ as the prosthetic group as cloned in a broad-host-range vector defected of conjugative transfer function beforehand and that the plasmid is capable of being expressed in bacteria of the genus Pseudomonas.
摘要:
The invention relates to cells which make rhamnolipids and are genetically modified such that they have a decreased activity, compared to the wild type thereof, of an ABC glucose transporter and, compared to the wild type thereof, an increased activity of at least one non-ABC glucose transporter and to a method for producing rhamnolipids using the cells according to the invention.
摘要:
The present disclosure provides multi-walled carbon nanotubes and carbon nanotubes (CNTs) displaying catalytic enzymes bound to the nanotube sidewalls and devices, such as electrodes, incorporating these catalytic enzyme-bound CNTs (cebCNTs).
摘要:
The invention relates to novel PQQ-dependent soluble glucose dehydrogenases (sPQQGDH) which have an increased substrate specificity compared with the wild type, and also to methods for production and identification thereof.
摘要:
A fusion protein of pyrroloquinoline quinone glucose dehydrogenase (PQQGDH) and a cytochrome is disclosed. PQQGDH is, for example, a water-soluble PQQGDH derived from Acinetobacter calcoaceticus. The cytochrome is, for example, an electron transfer domain of quinohemoprotein ethanol dehydrogenase from Comamonas testosteroni. The fusion protein of the present invention shows intramolecular electron transfer from PQQ, a redox center, to the cytochrome, which allow construction of a direct electron transfer-type glucose sensor which requires no electron mediators.