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葡萄糖-6-磷酸酶活性中的多个热不连续性。

Multiple thermal discontinuities in glucose-6-phosphatase activity.

作者信息

Grinna L S

出版信息

Biochim Biophys Acta. 1975 Oct 22;403(2):388-92. doi: 10.1016/0005-2744(75)90067-4.

DOI:10.1016/0005-2744(75)90067-4
PMID:170970
Abstract

The temperature dependence of glucose-6-phosphatase (D-glucose-6-phosphate phosphohydrolase EC 3.1.3.9) was studied in rat liver and kidney microsomal fractions. Arrhenius plots were non-linear and showed four distinct discontinuities in enzyme activity over the temperature range 2-41 degrees C. The discontinuities occurred at approx. 39, 30, 20 and 12 degrees C in the liver and were similar to this in the kidney. Changes in the energy of activation for the enzyme were noted at approx. 20 degrees C in both tissues. The multiple discontinuities in glucose-6-phosphatase activity are viewed as a reflection of complex reorganization and/or change in physical state of the membrane components, primarily lipid.

摘要

在大鼠肝脏和肾脏微粒体组分中研究了葡萄糖-6-磷酸酶(D-葡萄糖-6-磷酸磷酸水解酶,EC 3.1.3.9)的温度依赖性。阿累尼乌斯曲线是非线性的,并且在2-41摄氏度的温度范围内酶活性出现了四个明显的间断点。这些间断点在肝脏中大约出现在39、30、20和12摄氏度,在肾脏中与之相似。在两种组织中大约20摄氏度时都注意到了该酶活化能的变化。葡萄糖-6-磷酸酶活性的多个间断点被视为膜成分(主要是脂质)复杂重组和/或物理状态变化的反映。

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Multiple thermal discontinuities in glucose-6-phosphatase activity.葡萄糖-6-磷酸酶活性中的多个热不连续性。
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[Role of microviscosity of the lipid phase of microsomal membranes in regulation of enzymatic activity of glucose-6-phosphatase under microsomal modifications in vivo and in vitro].[微粒体膜脂相微粘度在体内外微粒体修饰下对葡萄糖-6-磷酸酶酶活性调节中的作用]
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Evidence for changes in the conformational status of rat liver microsomal glucose-6-phosphate:phosphohydrolase during detergent-dependent membrane modification. Effect of p-mercuribenzoate and organomercurial agarose gel on glucose-6-phosphatase of native and detergent-modified microsomes.去污剂依赖性膜修饰过程中大鼠肝脏微粒体葡萄糖-6-磷酸磷酸水解酶构象状态变化的证据。对氯汞苯甲酸和有机汞琼脂糖凝胶对天然和去污剂修饰微粒体葡萄糖-6-磷酸酶的影响。
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The phosphohydrolase component of the hepatic microsomal glucose-6-phosphatase system is a 36.5-kilodalton polypeptide.肝脏微粒体葡萄糖-6-磷酸酶系统的磷酸水解酶成分是一种36.5千道尔顿的多肽。
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