通过TBK1适配器NAP1和SINTBAD控制线粒细胞衰变的启动和进展
Elias Adriaenssens1,2,3, Thanh Ngoc Nguyen4,5,6,7, Justyna Sawa-Makarska8,9,4
1Max Perutz Labs, Vienna Biocenter Campus (VBC), Vienna, Austria. elias.adriaenssens@univie.ac.a.
Nature structural & molecular biology
|June 25, 2024
概括
结核基1适配器NAP1和SINTBAD在线粒细胞衰变中充当静电剂. 它们可以防止氨酸驱动的线粒的过度激活,同时促进核点蛋白52驱动的线粒的进展.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 自学研究 自学研究
背景情况:
- 线粒体菌对于线粒体质量控制至关重要,可以去除受损的线粒体.
- 控制线粒细胞衰变的开始和进展的调节机制仍然不完全理解.
- 由PTEN诱导的假定酶1 (PINK1) /帕金金依赖的线粒是一种关键途径,但其他选择性自路也存在.
研究的目的:
- 阐明 TANK 结合激酶 1 (TBK1) 适配器 NAP1 和 SINTBAD 在调节线粒细胞衰变中的作用.
- 调查这些适配器如何控制不同线粒细胞衰变途径的启动和进展,特别是由光素 (OPTN) 和核点蛋白52 (NDP52) 驱动的线粒细胞衰变.
- 了解细胞策略,防止途径过度活跃,同时确保有效的线粒消化.
主要方法:
- 使用生物化学和细胞分析研究了TBK1,NAP1,SINTBAD,OPTN和NDP52之间的相互作用.
- 评估了NAP1和SINTBAD对OPTN和NDP52介导的线粒的启动和进展的影响.
- 利用基因操纵来研究这些蛋白质在线调节中的功能.
主要成果:
- NAP1和SINTBAD通过与OPTN竞争TBK1结合来限制OPTN驱动的线粒细胞衰变的启动.
- NAP1和SINTBAD通过招募TBK1到NDP52并稳定其与FIP200的相互作用来促进NDP52驱动的髓进展.
- OPTN在线开始时作为主要的TBK1招募器,随后增强NDP52介导的线.
结论:
- NAP1和SINTBAD的功能是货物受体静电剂,调节线粒细胞吸收.
- 这些适配器通过OPTN建立了较高的线粒开始值,但通过NDP52.2促进了途径的进展.
- 这些发现揭示了一种细胞机制,它平衡了线粒细胞吸收途径的灵敏度和效率,以防止过度活跃.
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