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Merck
CN

C2409

Sigma-Aldrich

肌酸酶 来源于放线杆菌

lyophilized powder, ≥4 units/mg solid

别名:

肌酸脒基水解酶

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About This Item

CAS号:
EC 号:
MDL编号:
UNSPSC代码:
12352204
NACRES:
NA.54

生物来源

bacterial (Actinobacillus spp.)

质量水平

表单

lyophilized powder

比活

≥4 units/mg solid

分子量

~100 kDa

储存温度

−20°C

一般描述

肌酸酶是催化肌酸水解的同型二聚体。它由两个单体亚基和两个指定结构域组成;N和C末端结构域。C端折叠在两个结构相似的结构域内,同时具有α螺旋和反平行β折叠。在这两个结构域之间,一个巯基作为活性位点,其活性无金属依赖性。

应用

肌酸酶与肌氨酸氧化酶混合可用于测定不同pH值、温度、酶比和缓冲液浓度下的肌酸水平。也可以通过使用离心分析仪来测定血浆肌酐水平。

生化/生理作用

肌酸酶加速肌酸和水分子转化形成肌氨酸和尿素的反应。它总是以同型二聚体状态起作用,并由氯化胆碱诱导。

物理属性

等电点: 4.6 ± 0.1
米氏常数: 1.9 x 10‾2M(肌酸)
结构: 每摩尔酶2个亚基
抑制剂: Cu++,Hg++,Ag+
最佳pH: 8.0
最佳温度: 40℃
pH稳定性: pH 5.5 − 9.0(25℃,16hr)
热稳定性: 低于50℃(pH 7.5,30分钟)

单位定义

在pH 7.5、37℃条件下,1个单位将每分钟水解1.0 μmol肌酸形成尿素和肌氨酸。

外形

含有糖和EDTA 作为稳定剂的冻干粉

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

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

Eyeshields, Gloves, type N95 (US)

法规信息

常规特殊物品

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number

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J F Bazan et al.
Proceedings of the National Academy of Sciences of the United States of America, 91(7), 2473-2477 (1994-03-29)
Amino acid sequence comparison suggests that the structure of Escherichia coli methionine aminopeptidase (EC 3.4.11.18) and the C-terminal domain of Pseudomonas putida creatinase (EC 3.5.3.3) are related. A detailed comparison of the three-dimensional folds of the two enzymes confirms this
Balasundaram Padmanabhan et al.
Acta crystallographica. Section D, Biological crystallography, 58(Pt 8), 1322-1328 (2002-07-24)
The crystal structure of Actinobacillus creatine amidinohydrolase has been solved by molecular replacement. The amino-acid sequence has been derived from the crystal structure. Crystals belong to space group I222, with unit-cell parameters a = 111.26 (3), b = 113.62 (4)
H Crocker et al.
Journal of clinical pathology, 41(5), 576-581 (1988-05-01)
An enzymatic kit method for the determination of plasma creatinine was optimised for use with a centrifugal analyser and its performance characteristics and practicability compared with an end point and a kinetic Jaffé-based method. The enzymatic method exhibited several advantages
M-L Lee
Pediatric cardiology, 26(6), 792-796 (2005-08-06)
I report on a 3-month-old infant with pulmonary atresia-intact ventricular septum and ventriculocoronary communication (VCC) who underwent percutaneous radiofrequency valvulotomy and valvuloplasty (RFVV). The patient's cardiac troponin-I, creatine kinase (CK), and myocardial fraction of (CK-MB) were elevated before RFVV and
T Yoshimoto et al.
Journal of biochemistry, 79(6), 1381-1383 (1976-06-01)
A method was developed for purification and crystallization of creatinase [creatine amidinohydrolase, EC 3.5.3.3] from Pseudomonas putida var. naraensis C-83. The purified preparation appeared homogeneous on disc electrophoresis and ultracentrifugation and had a molecular weight of 94,000. It was most

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