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Merck
CN

G7146

Sigma-Aldrich

葡萄糖氧化酶 来源于黑曲霉

Isoelectric focusing marker, pI 4.2

别名:

β-D-葡萄糖:氧 1-氧化还原酶, G.Od., GOx

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About This Item

CAS号:
EC 号:
MDL编号:
UNSPSC代码:
12352204

表单

solid

分子量

160 kDa

pI 

4.2

储存温度

−20°C

InChI

1S/C6H12O6/c7-1-2-3(8)4(9)5(10)6(11)12-2/h2-11H,1H2/t2-,3-,4+,5-,6-/m1/s1

InChI key

WQZGKKKJIJFFOK-VFUOTHLCSA-N

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一般描述

分子量:160 kDa(凝胶过滤)
pI: 1865
消光系数:E1% = 16.7 (280 nm)

来自黑曲霉的葡萄糖氧化酶是由 2 个相等的亚基组成的二聚体,每个亚基的分子量为 80kDa。每个亚基含有一个黄素腺嘌呤二核苷酸部分和一个铁。该酶是含有 ~16% 中性糖和 2% 氨基糖的糖蛋白。该酶还含有 3 个半胱氨酸残基和 8 个 N-连接糖基化的潜在位点。

葡萄糖氧化酶能够以不同的速率氧化 D-己醛糖、单脱氧-D-葡萄糖和甲基-D-葡萄糖。

葡萄糖氧化酶的最佳 pH 为 5.5,虽然它的活性范围很宽,pH 4-7葡萄糖氧化酶对β-D-葡萄糖具有特异性,KM为33-110mM。

葡萄糖氧化酶不需要任何活化剂,但它被Ag+、Hg2+、Cu2+、醋酸苯汞和对-氯甲基苯甲酸酯抑制。它不受非金属 SH 试剂的抑制:N-乙基马来酰亚胺、碘乙酸盐和碘乙酰胺。

葡萄糖氧化酶可用于酶法测定溶液中的 D-葡萄糖。由于葡萄糖氧化酶将β-D-葡萄糖氧化成D-葡糖酸内酯和过氧化氢,因此辣根过氧化物酶通常用作葡萄糖测定的偶联酶。尽管葡萄糖氧化酶对β-D-葡萄糖具有特异性,但是可以对D-葡萄糖溶液进行定量,因为当酶促反应消耗β-D-葡萄糖时,α-D-glucose葡萄糖将变为β-D-葡萄糖。

应用

葡萄糖氧化酶广泛用于食品和制药工业,以及葡萄糖生物传感器的主要组分。

生化/生理作用

葡萄糖氧化酶催化β-d-葡萄糖氧化成 d-葡糖酸-β-内酯和过氧化氢,分子氧作为电子受体。

单位定义

在 pH 5.1,35℃ 下,一个单位每分钟将1.0 μmole的β-D-葡萄糖氧化成 D-葡糖酸内酯和 H2O2,相当于每分钟吸收22.4 μl O2。如果反应混合物被氧气饱和,则活性最多可增加 100%。

象形图

Health hazard

警示用语:

Danger

危险声明

预防措施声明

危险分类

Resp. Sens. 1

储存分类代码

11 - Combustible Solids

WGK

WGK 1

个人防护装备

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

法规信息

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Karnit Bahartan et al.
Chemical communications (Cambridge, England), 48(98), 11957-11959 (2012-11-06)
Yeast displaying glucose oxidase on their surface were encapsulated in a graphene oxide hydrogel. The ability of the modified yeast to reduce graphene oxide by glucose assimilation while maintaining viability was tested with time and deemed suitable for biofuel cell
Kun Deng et al.
Analytica chimica acta, 759, 61-65 (2012-12-25)
In this work, a new label-free electrochemical aptamer-based sensor (aptasensor) was constructed for detection of platelet-derived growth factor (PDGF) based on the direct electrochemistry of glucose oxidase (GOD). For this proposed aptasensor, poly(diallyldimethylammonium chloride) (PDDA)-protected graphene-gold nanoparticles (P-Gra-GNPs) composite was
Yinhui Yi et al.
Chemical communications (Cambridge, England), 49(6), 612-614 (2012-12-12)
Si quantum dots have been demonstrated to be environmentally friendly photoluminescence probes and their fluorescence was quenched by H(2)O(2) that was produced from the glucose oxidase-catalyzed oxidation of glucose. This strategy could be used to detect glucose with high sensitivity
Rong Hu et al.
Biosensors & bioelectronics, 41, 442-445 (2012-10-16)
A universal sensing platform for fluorescence turn-on detection of biomolecules is developed based on Fenton reaction triggered molecular beacon cleavage. Due to its high quenching efficiency, molecular beacons (MBs)-based sensing systems usually show low background fluorescence and large signal-to-background ratio.
Habib Razmi et al.
Biosensors & bioelectronics, 41, 498-504 (2012-10-27)
Graphene quantum dots (GQD) were introduced as a novel and suitable substrate for enzyme immobilization. Glucose oxidase (GOx) was immobilized on GQD modified carbon ceramic electrode (CCE) and well-defined quasi-reversible redox peaks were observed. The UV-vis photoluminescence spectroscopy, transition electron

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