TMEM175 是一个 K ((+) 管道调节 lysosomal 功能的器官吗?
Chunlei Cang1, Kimberly Aranda1, Young-jun Seo1
1Department of Biology, University of Pennsylvania, 415 South University Avenue, Philadelphia, PA 19104, USA.
Cell
|August 29, 2015
概括
科学家们发现了一种新的通道TMEM175,它对 lysosome 和 endosome 功能至关重要. 这一发现揭示了有机体透性的分子基础,影响细胞过程.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生理学 生理学 生理学
背景情况:
- 离子 (K+) 对细胞功能至关重要,主要研究在血膜.
- 在有机细胞功能中的作用,特别是在 lysosomes 和 endosomes 中,仍然在很大程度上未知.
- 了解有机细胞离子运输对于细胞平衡至关重要.
研究的目的:
- 为了研究 (K+) 穿透器官膜的机制.
- 为了确定蛋白质负责K +导电在溶解体和内分体.
- 阐明器官K+通道在细胞过程中的功能意义.
主要方法:
- 直接记录有机体K+导电性的记录.
- 在 lysosomes 中的 TMEM175 的遗传删除.
- 测量溶酶体膜潜力 (ΔΨ) 和光pH.
- 分析了自体-溶酶体融合动态.
主要成果:
- 一个新的K+选择性通道,KEL,在内分体和溶解体上被确定,由TMEM175.5形成.
- TMEM175缺乏正规的K+通道特征 (例如GYG签名).
- 缺乏TMEM175的溶解体显示K+导电能力受损,脱极化膜潜能,不稳定的pH值和自性缺陷.
结论:
- TMEM175作为一个K+通道,调解解体和内体的透性.
- 这一发现为有机细胞K+运输提供了分子基础.
- 在自过程中,TMEM175对于维持 lysosomal 功能和细胞平衡至关重要.
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