MLKL的乙基化影响其在亡中的功能
Apoorva J Pradhan1, Shweta Chitkara1, Ricardo X Ramirez2
1Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States.
ACS chemical biology
|February 1, 2024
概括
混合基因酶域样 (MLKL) 蛋白质的S-化发生在亡过程中特定的囊蛋白位点. 阻止这种化会破坏MLKL的稳定,减少细胞死亡和炎症.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 分子信号传输的方法
背景情况:
- 混合系基因酶域样 (MLKL) 对于亡,一种编程细胞死亡的形式至关重要.
- MLKL的激活涉及酸化和转移到等离子体膜,导致膜透和炎症.
- 以前的研究表明,MLKL及其酸化形式 (pMLKL) 在亡过程中经历S-化.
研究的目的:
- 为了表征在MLKLS-化中涉及的特定的囊残留物.
- 研究MLKL化对其与细胞膜相互作用的影响.
- 确定负责pMLKL化的S-palmitoyltransferases,并评估它们在亡中的作用.
主要方法:
- 位点定向的突变发生,以确定MLKL化位点.
- 全原子分子动态模拟来分析蛋白质膜相互作用.
- 基于细胞的测试,以评估zDHHC21抑制对pMLKL水平和细胞活性的影响.
主要成果:
- MLKL和pMLKL可以在单个氨酸位点被乙基化,C184,C269和C286被确定为潜在的位点.
- 分子动力学模拟显示了化对MLKL结构和膜结合的明显影响.
- 抑制zDHHC21显著降低了pMLKL水平,改善了膜完整性,并改善了尸活动.
结论:
- 在特定的囊蛋白中MLKL的S-化是死的关键调节机制.
- 向MLKL化,特别是zDHHC21活动,提供了一种潜在的治疗策略来控制死.
- 这项研究阐明了S-化在MLKL功能中的作用及其在亡过程中的膜相互作用.
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