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阿波和阿托瓦斯塔丁结合的人类3-基-3-甲基氨酸-辅酶A减少酶的冷-EM结构

Manikandan Karuppasamy¹, Jason van Rooyen¹

¹eBIC-for-Industry, Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom.

Acta crystallographica. Section F, Structural biology communications

|February 20, 2025

概括

确定了人类3 - - 3 - 甲基 - - 同酶A减少酶 (HMGR) 的冷-EM结构. 这揭示了阿托瓦斯塔丁如何与酶结合,为心血管疾病药物发现提供了洞察力.

科学领域:

生物化学生化学
结构生物学结构生物学
药理学药理学是指药理学的学科.

背景情况:

3-基-3-甲基酸-共酶A减少酶 (HMGR) 是一种调节胆固醇合成的关键酶.
HMGR是治疗心血管疾病的关键药物目标.
了解HMGR结构对于开发有效的降胆固醇药物至关重要.

研究的目的:

为了确定人类HMGR的催化领域的冷电子显微镜 (cryo-EM) 结构.
阐明心血管药物阿托瓦斯塔丁与HMGR的结合方式.
探索一种使用石墨烯氧化物用于难以结晶的蛋白质的新型冷EM方法.

主要方法:

使用冷电子显微镜 (cryo-EM) 来解析HMGR的结构.
该研究分析了HMGR的apo形式及其与阿托瓦斯塔丁的复合物.
石墨烯氧化物被用作冷EM样本准备中的额外支持.

主要成果:

高分辨率的HMGR (apo和阿托瓦斯塔丁结合) 的冷EM结构分别在2.1和2.3 Å获得.
观察到阿托瓦斯塔丁可以结合HMGR四重酶的四个活性位点.
阿托瓦斯塔丁的结合并没有诱导HMGR蛋白或其活性部位的显著构造变化.

结论:

确定的结构为阿托瓦斯塔丁抑制HMGR提供了详细的见解.
使用氧化石墨烯的新型冷EM方法为具有挑战性的目标的结构研究提供了可行的替代方案.
这种方法可以通过促进HMGR和类似酶的结构分析来帮助心血管疾病的药物发现.

关键词:

这就是HMGR.在SPA中使用冷EM.亚托尔瓦斯塔丁是一种石墨烯氧化物石墨烯氧化物

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相关概念视频

Cryo-electron Microscopy

Cryo-electron Microscopy

Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...