通过道传感和陪伴者行动,NAC通过道传感和陪伴者行动控制新生的链命运
Jae Ho Lee1,2, Laurenz Rabl3, Martin Gamerdinger3
1Department of Biology, Stanford University, Stanford, CA 94305, USA.
bioRxiv : the preprint server for biology
|August 6, 2025
概括
新生的聚相关复合体 (NAC) 是蛋白质生产的关键调节者. 它通过与核糖体内外的新蛋白相互作用来控制翻译,折叠和准.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 蛋白质生物化学 蛋白质生物化学
背景情况:
- 新生聚相关复合体 (NAC) 是一个关键的核糖体相关因子,参与蛋白质生物发生.
- 它在协调翻译,折叠和定位方面的精确功能仍然不完全理解.
研究的目的:
- 阐明NAC在调节蛋白质生物生成中的多方面的作用.
- 在翻译过程中调查NAC与新生多的相互作用.
- 了解NAC在配翻译折叠和器官向中的机制.
主要方法:
- 在*C. elegans*中进行NAC选择性核糖体分析,以映射新生多的NAC结合部位.
- 分析NAC与新生蛋白之间的特定序列相互作用.
- 研究NAC在翻译延长动力学和核糖体碰撞预防中的作用.
主要成果:
- 识别了成千上万的特定序列的NAC结合事件在蛋白质组中,参与疏水和螺旋动机.
- 发现了一个道内传感机制,其中NAC在核糖体出口道内结合了非常短的新生链.
- 证明早期的NAC相互作用减缓了翻译延长,防止了核糖体碰撞,并保护了容易聚合的中间体.
- 显示的NAC屏蔽两性螺旋,促进细胞核折叠,并通过信号序列识别帮助线粒体/ER向.
结论:
- NAC作为一个早期作用的,多面的协同翻译性蛋白质稳定的协调者.
- 根据新生的链条序列和目的地,NAC采用了不同的机制.
- NAC的功能包括对翻译的动力控制,护送活动,并促进蛋白质向各种器官.
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