两性N端螺旋在整个进化过程中通过一种类似于抗微生物的机制驱动MLKL介导的亡
Xin Tian1, Xiaotong Jin1, Shuai Jiang1
1State Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266000, China; Laboratory for Marine Biology and Biotechnology,Qingdao Marine Science and Technology Center, Qingdao 266000, China; Laboratory of Experimental Marine Biology,Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266000, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China.
死体亡依赖于MLKL.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 亡是一种受调节的细胞死亡途径,由MLKL执行.
- MLKL的N端4HB域对于膜破坏至关重要,但在进化过程中保存不良.
- 针对MLKL的等离子膜向和破坏的机制尚未完全理解.
研究的目的:
- 调查MLKL介导的膜破坏的进化保护和分子机制.
- 确定N端4HB域和寡合化在亡中的作用.
- 在MLKL中识别保存的功能残留物和结构适应.
主要方法:
- 人类和远程飞行器MLKL的比较分析.
- 位点定向的突变发生以探测功能域.
- 对MLKL-膜相互作用的生物物理特征.
主要成果:
- 单独MLKL的N端4HB域可以诱导膜破裂,独立于支架区域.
- 寡合化对于膜溶解是不够的;完整的N端是关键的.
- 静电电荷和疏水性残留物驱动MLKL的膜准和透.
- MLKL表现出抗微生物类膜溶解活性.
- 尽管序列分离,MLKL介导的膜溶解在进化上是保留的.
- 孔形成和伪酶域中的关键功能残留物被保存.
结论:
- 由于特定的物理化学性质,MLKL的膜性功能在不同物种中得到保护.
- 在MLKL中的结构性适应性在进化过程中保留了其核心的死细胞功能.
- 了解MLKL的分子决定因素,可以了解受调控的细胞死亡机制.
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