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Updated: May 30, 2025

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通过冷EM和MD模拟揭示了血管素-I转化酶的二度化和动态

Jordan M Mancl¹, Xiaoyang Wu¹, Minglei Zhao²

¹Ben-May Department for Cancer Research, The University of Chicago, Chicago, Illinois, United States.

bioRxiv : the preprint server for biology

|January 27, 2025

概括

我们确定了可溶性 ангиотензин-I转化酶 (sACE) 的冷电子显微镜结构,揭示了四种不同的状态. 这为SACE的结构动态和心血管疾病的潜在治疗调制提供了洞察力.

科学领域:

生物化学生物化学
结构生物学结构生物学
心血管研究研究心血管研究

背景情况:

ангиотензин-I转化酶 (ACE) 对于调节生物活性,包括 ангиотензин-II 和粉胺β,至关重要.
ACE 抑制剂是标准的心血管疗法,但有副作用,如增加肺癌风险.
之前对ACE的结构研究仅限于单个领域或部分变质的形式.

研究的目的:

为了确定全长,糖化,可溶性ACE (sACE) 分子的高分辨率冷电子显微镜 (cryo-EM) 结构.
阐明构造动态,并确定介导sACE构造变化的关键区域.
为设计特定领域的SACE调制器提供结构基础.

主要方法:

低温电子显微镜 (cryo-EM) 的全长糖基化SACE二次体.
全原子分子动力学 (MD) 模拟.
使用cryoSPARC,cryoDRGN和RECOVAR进行异质性分析.

主要成果:

在四个不同的状态 (2.993.65 Å分辨率) 中解析了全长sACE二极管的冷电磁结构.
确定了活性位点溶剂可访问性的变化,并揭示了完整的二分化接口.
阐明了SACE的形状动态,并确定了参与形状变化的关键区域.

结论:

这项研究提供了第一个高分辨率结构的全长糖基化SACE二次体.
确定了特定领域的结构动力学机制的差异.
这些发现对开发具有潜在减少副作用的新型,域特定的SACE调节器有影响.

关键词:

ангиотензин-I 转化酶转化酶所有原子的MD模拟.氨基胺是什么氨基胺冰冷化EMEM可以使用.这种高血压,高血压.

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