General description
等电点:4.3
米氏常数:3.4 X 10-4M(丙酮酸)
抑制剂:Fe++,Zn++,Cu++,Ag+,Hg++
最适 pH:5.7
最适温度:65oC
pH 稳定性:pH 5.7 - 6.5 (25oC, 20 小时)
热稳定性:低于45oC(pH 6.0,15分钟)
米氏常数:3.4 X 10-4M(丙酮酸)
抑制剂:Fe++,Zn++,Cu++,Ag+,Hg++
最适 pH:5.7
最适温度:65oC
pH 稳定性:pH 5.7 - 6.5 (25oC, 20 小时)
热稳定性:低于45oC(pH 6.0,15分钟)
Application
来自微生物的丙酮酸氧化酶已被用于丙酮酸的 Amplex Red 荧光检测中。此外,这类酶还被用于开发丙酮酸近实时连续检测系统。
丙酮酸氧化酶 (PoxB) 可将丙酮酸直接转化为乙酸盐和 CO2。它已被用于研究丙酮酸的代谢。这种酶可用于研究各种细菌的有氧代谢,例如植物乳杆菌和肺炎链球菌。在临床分析中,丙酮酸氧化酶可用于酶促测定丙酮酸、GOT、GPT。
Biochem/physiol Actions
丙酮酸氧化酶可将丙酮酸氧化形成乙酸盐、过氧化氢和二氧化碳。丙酮酸氧化酶需要黄素腺嘌呤二核苷酸(FAD),焦磷酸硫胺素TPP)和镁作为其催化活性的辅因子。丙酮酸氧化酶可被硫胺素辅因子激活。
丙酮酸氧化酶由四个具有相同分子量的亚基组成。 PoxB 可与某些醛反应,其中的磷酸盐可以被砷酸盐代替。氧气及几种人工化合物都可充当电子受体。丙酮酸氧化酶可由磷脂以及单体和胶束两亲物活化。
Physical form
含有FAD和糖(作为稳定剂)的冻干粉
Other Notes
在37°C、pH 5.7 条件下,在丙酮酸和磷酸盐转化为乙酰磷酸盐和 CO2 的过程中,一单位丙酮酸氧化酶每分钟可产生 1.0 μmole H2O2。
signalword
Danger
hcodes
pcodes
Hazard Classifications
Resp. Sens. 1
存储类别
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
法规信息
常规特殊物品
此项目有
Multiplexed and fully automated detection of metabolic biomarkers using microdialysis probe
Das C, et al.
Sensors and Actuators B, Chemical, 238, 633-640 (2017)
Piotr Neumann et al.
Proceedings of the National Academy of Sciences of the United States of America, 105(45), 17390-17395 (2008-11-08)
The thiamin- and flavin-dependent peripheral membrane enzyme pyruvate oxidase from E. coli catalyzes the oxidative decarboxylation of the central metabolite pyruvate to CO(2) and acetate. Concomitant reduction of the enzyme-bound flavin triggers membrane binding of the C terminus and shuttling
Masoom Yasinzai
The International journal of biological markers, 24(2), 107-111 (2009-07-28)
Cancer patients are found to have elevated serum levels of lipid-associated sialic acid (LASA). LASA measurement provides a valuable test for the diagnosis of human cancer. The currently used measurement methods are tedious and nonselective. Here we report a method
A novel biosensor based on activation effect of thiamine on the activity of pyruvate oxidase
Akyilmaz E and Yorganci E
Biosensors And Bioelectronics, 23(12), 1874-1877 (2008)
Alice Dawson et al.
Journal of molecular biology, 401(2), 253-264 (2010-07-06)
The first committed step in the classical biosynthetic route to menaquinone (vitamin K(2)) is a Stetter-like conjugate addition of alpha-ketoglutarate with isochorismate. This reaction is catalyzed by the thiamine diphosphate and metal-ion-dependent 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexadiene-1-carboxylate synthase (MenD). The medium-resolution (2.35 A) crystal
实验方案
Protocol for Assay Procedure for Pyruvate Oxidase Bacterial
全球贸易项目编号
| 货号 | GTIN |
|---|---|
| P4591-100UN | 04061834374909 |
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