通过LUBAC进行的M1链接的无所不在调节AMPK信号和对能量压力的反应
Camilla Reiter Elbæk1,2, Sophie Gradinaru1, Anna M Dahlström3
1Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.
Cell death and differentiation
|February 13, 2026
概括
线性ubiquitin链组合复合体 (LUBAC) 和OTULIN调节AMPK的激活. 在能量压力期间,LUBAC促进AMPK的激活,而OTULIN则抑制它,影响代谢适应能力.
科学领域:
- 细胞生物学 细胞生物学
- 代谢过程中的代谢.
- 在Ubiquitination信号传输.
背景情况:
- 氨酸-1 (M1) 连接的泛素链对于免疫恒温至关重要.
- 通过LUBAC和OTULIN调节M1相关的无化,与自身炎症和代谢障碍有关.
- 通过LUBAC和OTULIN影响代谢信号的精确机制在很大程度上是未知的.
研究的目的:
- 研究LUBAC和OTULIN在调节代谢信号传递中的作用.
- 为了确定M1链接的泛素化如何影响能量感应激酶AMPK.
- 阐明细胞能量平衡中连接LUBAC,OTULIN和AMPK的分子机制.
主要方法:
- 在细胞和体外模型中研究了LUBAC,OTULIN和AMPK之间的相互作用.
- 使用了遗传功能丧失模型 (LUBAC子单位,OTULIN,Drosophila Lubel).
- 评估了AMPK激活,全方位化状态,自和在能量压力和饥饿下细胞生存.
主要成果:
- 卢巴克和奥图林可以动态调节能量感应激酶AMPK.
- 卢巴克促进,而奥图林对抗,AMPK激活,以应对能量压力.
- 卢巴克直接在AMPK子单元中产生泛,使得AMPK成为M1-泛基底.
- 失去LUBAC会影响AMPK的激活,降低代谢适应能力,并危及自和饥饿生存.
结论:
- 链接到M1的无所不在是一种控制AMPK激活的新型调节机制.
- 这一途径对于代谢适应能力和细胞对能量压力的反应至关重要.
- 研究结果揭示了能量恒温的新层调节,对代谢疾病有影响.
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