Hexokinase

Japanese: ヘキソキナーゼ
Hexokinase

EC 2.7.1.1. An enzyme that catalyzes the phosphorylation of many D -hexoses and their derivatives by the following reaction:

D -Hexose + ATP

D -Hexose 6-phosphate + ADP

It is found in microorganisms such as bacteria, yeast, and filamentous fungi, as well as in higher plants and animal tissues, and has been crystallized from yeast. D -glucose, D -fructose, D -mannose, 2-deoxy- D -glucose, and D -glucosamine are generally used as substrates, while D -xylose, D -lyxose, 6-deoxy- D -glucose, and N -acyl- D -glucosamine competitively inhibit the enzyme action. In the case of yeast preparations, activity against nucleotides was shown to decrease in the following order: ATP, deoxy-ATP, ITP, UTP, CTP, and GTP. Enzyme activity is enhanced by Mg2 + and inhibited by SH reagents and alloxan. [CAS 9001-51-8]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

Japanese:

EC 2.7.1.1.下記の反応により,多くのD-ヘキソースおよびその誘導体のリン酸化を触媒する酵素である.

   D-ヘキソース + ATP

D-ヘキソース6-リン酸 + ADP   

細菌,酵母,糸状菌のような微生物,高等植物および動物組織に含まれ,酵母から結晶化された.基質として,一般にD-グルコース,D-フルクトース,D-マンノース,2-デオキシ-D-グルコース,D-グルコサミンが用いられ,D-キシロース,D-リキソース,6-デオキシ-D-グルコース,N-アシル-D-グルコサミンはきっ抗的に酵素作用を阻害する.ヌクレオチドに対する活性は,酵母標品の場合,ATP,デオキシ-ATP,ITP,UTP,CTP,GTPの順で減少することが示された.酵素活性は Mg2+ によって高められ,SH試薬,アロキサンによって阻害される.[CAS 9001-51-8]

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