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[膜水解与转运过程的结构与功能整合(“渗透组”假说)]

[Structural and functional integration of the processes of membrane hydrolysis and transport ("permeome" hypothesis)].

作者信息

Ugolev A M

出版信息

Fiziol Zh SSSR Im I M Sechenova. 1977;63(2):181-90.

PMID:870342
Abstract

It was suggested and experimentally proved that the transport system's input is a part of an enzyme-transport ensemble and an allosteric regulator of enzyme activity. In special experiments, a typical for cooperation sygmoidal kinetics of saccharose and maltose hydrolysis was shown, as well as of their hydrolysis products transport, if the enzyme is involved in the actively transporting intestine mucosa. On the contrary, it is the hyperbolic curve which is specific for isolated digestive enzymes and for glucose accumulation. Replacement of oxygen with nitrogen and specific blockage of the glucose transporting agent with floridzine leads to disappearance or sharp reducing of the sygmoidality. The term "ergome" is suggested for designation of the minimal ensemble of elements able to carry out an elementary physiological process, the term "permeome"--for the transporting ergome.

摘要

有人提出并通过实验证明,转运系统的输入是酶 - 转运整体的一部分,也是酶活性的变构调节因子。在特殊实验中,当酶参与主动转运的肠黏膜时,蔗糖和麦芽糖水解以及它们水解产物的转运呈现出典型的协同S形动力学。相反,双曲线则是分离的消化酶和葡萄糖积累所特有的。用氮气替代氧气以及用氟化物特异性阻断葡萄糖转运剂会导致S形消失或急剧降低。建议用“功能体”一词来表示能够执行基本生理过程的最小元素整体,用“渗透体”一词来表示转运功能体。

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