皮罗普托斯执行者孔隙形成蛋白质 gasdermin D 形成寡合组合,并表现出类似粉样蛋白的属性,这可能有助于其孔隙形成功能
Shamaita Chatterjee1, Tarang Gupta2, Gurvinder Kaur1
1Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, SAS Nagar, Manauli, Mohali, Punjab 140306, India.
The Biochemical journal
|November 6, 2024
概括
加斯德明D (GSDMD) 具有粉样性质,形成二硫化物依赖的寡合体,对于其在热中形成孔隙的功能至关重要. 改变其易受粉样蛋白影响的区域会损害细胞死亡活动.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 加斯德明D (GSDMD) 执行 pyroptosis,一种炎症性细胞死亡的形式.
- GSDMD的N端域 (NTD) 在细胞膜中形成毛孔,释放细胞因子并诱导细胞死亡.
- 虽然研究了GSDMD的孔隙形成,但其物理化学性质及其功能作用的理解较少.
研究的目的:
- 描述小鼠GSDMD (mGSDMD) 的物理化学特性.
- 为了研究这些特性对mGSDMD的孔形成功能的影响.
- 探索粉样样特征在GSDMD的 pyroptotic活动中的作用.
主要方法:
- 详细的mGSDMD的物理化学特征.
- 在mGSDMD寡合化中对二硫化键依赖性的分析.
- 在mGSDMD的寡合化和功能中对粉样蛋白易受影响区域 (APR) 的研究.
- 在APR变化时评估毛孔形成能力和细胞杀伤活性.
主要成果:
- mGSDMD显示粉样蛋白的标志性特征,在溶液中形成二硫化物依赖的寡合体.
- 这些寡合体不同于典型的粉样纤维,易受蛋白质解.
- 一个粉样蛋白易受影响的区域 (APR) 对于mGSDMD寡合化和粉样蛋白样特征至关重要.
- 改变APR会损害NTD的毛孔形成能力和mGSDMD的细胞杀死功能.
结论:
- mGSDMD具有类似于粉样蛋白的特性,可以调节其在烧灭过程中形成毛孔的功能.
- 二硫化物键和APR对于mGSDMD的寡合化和细胞死亡的执行至关重要.
- 这项研究揭示了GSDMD的 pyroptotic活动的新型调节机制.
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