TMEM16F形成了Ca2+激活的阴离子通道,在血液凝结过程中需要进行血小板中的脂质杂乱
Huanghe Yang1, Andrew Kim, Tovo David
1Department of Physiology, Howard Hughes Medical Institute, University of California, San Francisco, 94143, USA.
Cell
|October 2, 2012
概括
TMEM16F蛋白对于血液凝固至关重要,作为激活的离子通道,对于血小板中的脂质杂乱至关重要. 它的功能障碍会导致出血障碍,并影响血栓形成,强调其在心血管健康中的作用.
科学领域:
- 分子生物学分子生物学
- 生物物理学的生物物理.
- 血液学 血液学 血液学
背景情况:
- 膜脂质不对称对于血液凝固至关重要.
- TMEM16F 缺乏与斯科特综合征和受损的依赖的脂质杂乱有关.
- TMEM16家族蛋白包括激活化通道 (CaCC).
研究的目的:
- 研究TMEM16F在血液凝固和血小板功能中的作用.
- 描述TMEM16F的离子通道活动.
- 为了确定TMEM16F通道选择性的分子决定因素.
主要方法:
- 产生和分析TMEM16F淘汰赛小鼠.
- 对出血缺陷和动脉血栓形成模型的评估.
- 异质表达的TMEM16F.的电生理学记录.
- 位点导向的突变发生以探测通道功能.
主要成果:
- TMEM16F淘汰赛小鼠显示出出血缺陷和对动脉血栓形成的保护.
- 来自淘汰赛小鼠的血小板显示缺乏依赖的胺暴露和促凝活性.
- TMEM16F的异质表达产生了一个小导电量,激活的非选择性阴离子 (SCAN) 电流,而不是一个CaCC.
- TMEM16F-SCAN通道对具有透性,包括Ca2+,并且由和电压封闭.
- 一种特定的孔隙残留物对TMEM16F和TMEM16A通道的阴离子对阴离子选择性产生影响.
结论:
- TMEM16F作为一个激活的阴离子通道,在血液凝结过程中对血小板血栓激酶活性至关重要.
- TMEM16F对于维持细胞膜脂质不对称性和血小板中的促凝功能至关重要.
- 了解TMEM16F通道属性,可以了解斯科特综合征和凝血障碍.
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