用超分辨率显微镜观察到的哺乳动物细胞中EGFR活性和局部PI的双边调节和局部PI的动态
Mitsuhiro Abe1, Masataka Yanagawa1,2, Michio Hiroshima1,3
1Cellular Informatics Laboratory, RIKEN Cluster for Pioneering Research, Wako, Japan.
eLife
|November 8, 2024
概括
皮表皮肤生长因子受体 (EGFR) 的活性是由酸氨基醇-4,5-双酸盐 (PI(4,5) P2) 纳米组的调节. 它们的时空动态和EGFR相互作用对于受体信号和酸化至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 膜生物物理学 膜生物物理学
背景情况:
- 性脂类,如酸氨基酸-4,5-双酸盐 (PI(4,5) P2) 是已知的表皮生长因子受体 (EGFR) 的调节者.
- 由于可视化挑战,PI(4,5)P2在控制活细胞内EGFR活性方面的时空动态的确切作用仍然不清楚.
研究的目的:
- 在活细胞中研究PI(4,5) P2纳米域与EGFR之间的时空关系.
- 阐明PI(4,5) P2动态如何影响EGFR二分化,自酸化和信号传递.
主要方法:
- 使用超分辨率单分子显微镜可视化HeLa细胞等离子体膜中的EGFR和PI(4,5) P2纳米域.
- 在表皮生长因子 (EGF) 刺激之前和之后,监测了EGFR和PI(4,5) P2纳米群聚动态.
- 评估了操纵PI{4,5) P2水平和水解对EGFR信号传递的影响.
主要成果:
- EGFR和PI(4,5) P2纳米域通过短暂的EGFR访问表现出前刺激聚合.
- EGF刺激降低了凝聚力,这取决于脂酶Cγ活性.
- 在EGF刺激时,降低PI(4,5) P2水平会损害EGFR二分化和自酸化.
- 抑制PI ((4,5) P2水解影响了EGFR-Thr654酸化.
结论:
- EGFR激酶活性和局部PI ((4,5) P2密度是相互调节的.
- PI(4,5) P2纳米域在调节EGFR信号动态方面发挥着至关重要的作用.
关键词:
欧洲农业基金会 (EGFR) 是一个基金.细胞生物学 细胞生物学皮肤上生长因子受体.人类 人类 人类 人类 人类 人类 人类膜脂质 膜脂质是一种酸氨基酸-4,5-双酸盐是一种单个分子成像技术超分辨率显微镜的显微镜.更多相关视频
09:16Studying the Stoichiometry of Epidermal Growth Factor Receptor in Intact Cells using Correlative Microscopy
Published on: September 11, 2015
8.4K
09:32Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
Published on: June 15, 2017
8.7K
相关概念视频
PI3K/mTOR/AKT Signaling Pathway
3.4K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.4K
Phosphoinositides and PIPs
8.5K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
8.5K
