首页> 外文期刊>Nature >The G-protein-gated atrial K+ channel IKACh is a heteromultimer of two inwardly rectifying K(+)-channel proteins.
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The G-protein-gated atrial K+ channel IKACh is a heteromultimer of two inwardly rectifying K(+)-channel proteins.

机译:G蛋白门控性心房K +通道IKACh是两个向内整流的K(+)通道蛋白的异源多聚体。

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摘要

Heart rate is slowed in part by acetylcholine-dependent activation of a cardiac potassium (K+) channel, IKACh. Activated muscarinic receptors stimulate IKACh via the G-protein beta gamma-subunits. It has been assumed that the inwardly rectifying K(+)-channel gene, GIRK1, alone encodes IKACh. It is now shown that IKACh is a heteromultimer of two distinct inwardly rectifying K(+)-channel subunits, GIRK1 and a newly cloned member of the family, CIR.
机译:心率部分受心脏钾(K +)通道IKACh的乙酰胆碱依赖性激活而减慢。激活的毒蕈碱受体通过G蛋白βγ亚基刺激IKACh。假定向内整流的K(+)通道基因GIRK1单独编码IKACh。现在表明,IKACh是两个不同的向内整流的K(+)通道亚基GIRK1和该家族的一个新克隆成员CIR的异源多聚体。

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