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磷脂酰肌醇-4,5-二磷酸对心肌内向整流性钾通道的调节

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摘要 磷脂酰肌醇-4,5-二磷酸(PIP2)是调节心肌各种内向整流钾通道(Kir)活动最基本的因素。PIP2与Kir通道氨基端和羧基端的多个氨基酸位点特异性结合,通过静电作用影响通道的空间构型和开放概率。PIP2与Kir通道亲和性的高低决定通道的开放水平。多种生理和病理过程可通过影响细胞膜上PIP2的含量,精细地控制Kir通道的活动水平,并改变通道对若干调控因素和对药物的的敏感性。
出处 《中国心脏起搏与心电生理杂志》 2006年第3期268-270,共3页 Chinese Journal of Cardiac Pacing and Electrophysiology
基金 北京市教委科技发展计划(KM200510025001) 北京市自然科学基金资助(编号7052012)
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