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GW806742X可以通过直接促进MLKL激酶 (如域二元化) 来诱导小鼠MLKL激活

Feiyang Yuan¹, Yu Zhang¹, Xinxin Zhu¹

¹School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China; State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

Experimental cell research

|April 6, 2025

概括

已知混合基因酶域样蛋白 (MLKL) 的抑制剂GW806742X,矛盾的是,通过直接诱导MLKL二分化和激活来促进亡,揭示了细胞死亡途径的双重作用.

科学领域:

细胞生物学细胞生物学
细胞死亡的分子机制
信号转导路径信号转导路径

背景情况:

混合基因酶域样蛋白 (MLKL) 的激活,涉及基因酶类域 (KLD) 的二分化,对于亡的执行至关重要.
化合物GW806742X此前已被确定为对小鼠MLKL KLD的直接结合剂,抑制TNF诱导的亡.

研究的目的:

为了研究GW806742X在亡中的复杂作用.
阐明GW806742X影响MLKL激活和二元化的机制.

主要方法:

表面等离子共振 (SPR) 用于结合亲和力.
化学交叉连接测试以检测蛋白质二分化.
非减少的西部斑点来评估MLKL的寡合化.
FKBPv 化学二度化器系统可触发死细胞灭绝.

主要成果:

GW806742X抑制了TNF诱导的RIP1依赖性亡,但促进了RIP3或MLKL自我寡合化诱导的亡.
高剂量的GW806742X直接诱导MLKL依赖性亡,并促进MLKL的寡合化.
证明GW806742X直接诱导重组小鼠MLKL KLD蛋白的二分化.
这种由GW806742X诱导的MLKL KLD二分化与RIP3酸化有关.

结论:

GW806742X在亡中表现出双重作用,通过对RIP1的潜在干扰来抑制它,同时通过促进MLKL KLD的二分化和激活来促进它.
这些发现突出了MLKL激活的新机制,并建议GW806742X作为剖析亡途径的有价值工具.

关键词:

在GW806742XX中使用.类似酶的域名 MLKL 没有使用尸体灭 (Necroptosis) 是一种死亡的过程.

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