DNA纳米设备检测到 lysosomal 表面上的酸性纳米层
Yutong Zhang1,2,3, Meiqin Hu2,4, Yaping Meng2
1Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, College of Biology, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, China.
Nature cell biology
|January 21, 2026
概括
lysosomes 在它们的外部形成一个独特的酸性纳米层,由TMEM175 (跨膜蛋白175) 调节. 这种周围的酸度,而不是内部的pH值,通过细胞质传感器控制 lysosome 的定位.
科学领域:
- 细胞生物学 细胞生物学
- 器官生物学 有机生物学
- 生物物理学的生物物理.
背景情况:
- lysosomes 需要一个酸性光体来产生酶活性.
- 质子泄漏和细胞间相互作用调节的机制尚不清楚.
研究的目的:
- 研究 lysosomal 表面的质子动力学.
- 通过pH传感识别调节 lysosomal 定位的因素.
主要方法:
- 开发DNA纳米器件用于对器官的pH值监测.
- 细胞成像和操纵TMEM175活动.
主要成果:
- 在 lysosomal 外表上发现了 21 nm 厚的酸性纳米层 (0.2-0.7 pH 单位低于细胞质).
- TMEM175被确定为维护这个纳米层的主要H+流出通道.
- 柔克斯塔-溶酶体酸度,而不是光质酸度,通过RILP传感调节溶酶体的定位.
结论:
- lysosomes 积极创造一个酸性细胞外纳米环境.
- 这种酸性纳米层作为细胞质调节溶解体功能和定位的关键接口.
- TMEM175和近溶酶体pH值是溶酶体-细胞醇相互作用的关键调节剂.
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