核糖体框架转移选择性调节错误折叠的CFTR变体的组装,功能和药物救援
Patrick Carmody1, Francis J Roushar1, Austin Tedman2
1Department of Chemistry, Indiana University Bloomington, Bloomington, IN, USA 47401.
bioRxiv : the preprint server for biology
|August 2, 2024
概括
在囊性纤维化转膜导电调节器 (CFTR) mRNA中新发现的一种RNA结构导致了核糖体框架转移. 这影响了 ΔF508 CFTR 蛋白组合,功能和药物救援,揭示了配翻译错折和翻译调节之间的联系.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 囊性纤维化转膜导电调节器 (CFTR) 的共转化错折是囊性纤维化 (CF) 病原体的核心.
- 最常见的CF变异, ΔF508 CFTR,表现出改变的转化调节和质量控制.
- 新生聚酸不合组装对翻译机械活动的直接影响仍然不清楚.
研究的目的:
- 调查新生的CFTR多组合错误如何影响翻译机械.
- 在CFTRmRNA中识别调节翻译的RNA结构元素.
- 确定这些RNA结构对ΔF508CFTR功能和药物反应的影响.
主要方法:
- 在CFTR mRNA中识别了一个结构动机,该动机会诱导 -1 核糖体框架转移和过早的翻译终止.
- 使用野生类型和 ΔF508 CFTR 变异与或没有特定RNA结构突变的蛋白质-RNA 相互作用的分析.
- 在ER膜蛋白复合体 (EMC) 存在或不存在的情况下,对CFTR调节器 (例如,Trikafta) 的 ΔF508 CFTR通道关口和反应的评估.
主要成果:
- 在CFTR mRNA中有一种特定的RNA基因刺激-1 核糖体框架转移和过早的翻译终止.
- 这种RNA结构的破坏会改变新生的 ΔF508 CFTR 与翻译和质量控制蛋白的相互作用.
- 修改RNA结构可增强 ΔF508 CFTR 通道功能,并通过CFTR调节器进行其救援,这种效应依赖于EMC.
结论:
- 核糖体框架转移选择性地调节了错误折叠的CFTR变异的组装,功能和药理学救援.
- 新生链,质量控制机制和核糖体之间的相互作用在响应共翻译错折时动态调整翻译过程性.
- 这突出了一个新的机制,将RNA结构,翻译和CFTR蛋白质平衡联系起来.
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