Functional properties of acetylcholine receptor monomeric and dimeric forms in reconstituted membranes.

Functional properties of acetylcholine receptor monomeric and dimeric forms in reconstituted membranes.
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重构膜中乙酰胆碱受体单体和二聚体形式的功能特性。

DOI:
10.1016/0006-291x(81)91764-2
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发表时间:
1981
影响因子:
3.1
通讯作者:
Raftery,MA
Raftery,MA
中科院分区:
生物学4区
文献类型:
--
作者:
Wu,WC;Raftery,MA

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在脂质存在下纯化并重构了加利福尼亚电鳐(Torpedo californica electroplax)乙酰胆碱受体的二聚体和单体形式。的光谱方法应用于研究的快速动力学的阳离子转运介导的每个重建乙酰胆碱受体低聚物。乙酰胆碱受体的二聚体和单体响应氨甲酰胆碱介导的阳离子转运的时间尺度上的几毫秒。对氨甲酰胆碱的反应被组胺毒素和脱敏作用阻断,表明这两种形式都表现出体内观察到的药理学特性。通过各种激动剂浓度产生的快速离子转运的分析产生了通过单个受体通道的估计转运速率。这些是相当的单体和二聚体,并与含有两种低聚物的混合物的制备获得的那些一致。
The dimeric and monomeric forms of the acetylcholine receptor from Torpedo californica electroplax have been purified in the presence of lipids and reconstituted. A spectroscopic method was applied to study the rapid kinetics of cation transport mediated by each of the reconstituted AcChR oligomers. Both the AcChR dimer and monomer responded to carbamylcholine by mediating cation transport on the time scale of a few milliseconds. The responses to carbamylcholine were blocked by histrionicotoxin and by desensitization, demonstrating that both forms manifest pharmacological properties observed in vivo. Analysis of the fast ion transport produced by various agonist concentrations yielded estimated rates of transport through a single receptor channel. These were comparable for the monomer and dimer and in agreement with those obtained for a preparation containing a mixture of both oligomers.
DOI: --
发表时间: 1979
期刊: Biochemistry
影响因子: 2.9
作者:
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发表时间: 1978
期刊: Biochemical and Biophysical Research Communications - BBRC
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发表时间: 1977
期刊: Biochemical and Biophysical Research Communications - BBRC
影响因子: --
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期刊: FEBS Letters
影响因子: 3.5
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DOI: --
发表时间: 1979
期刊: FEBS Letters
影响因子: 3.5
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