人体可溶性酸环酶的结构洞察力
Yunlu Kang1, Rui Liu1, Jing-Xiang Wu1
1State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking University, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Beijing, China.
Nature
|September 13, 2019
概括
通过氧化激活可溶性酸环酶 (sGC) 的情况尚不清楚. 低温-EM结构揭示了氧化与H-NOX域的结合如何触发形状变化,促进sGC酶活性.
科学领域:
- 生物化学
- 分子生物学
- 结构生物学
背景情况:
- 可溶性酸环酶 (sGC) 是氧化 (NO) 信号的关键酶.
- NO结合增强了sGC的酶活性,但激活机制仍然难以捉摸.
- 在生理过程和疾病中发挥关键作用.
研究的目的:
- 阐明通过氧化激活sGC的分子机制.
- 在各种功能状态下确定人类sGCα1β1的结构.
主要方法:
- 冷电子显微镜 (冷电子显微镜)
- 人类sGCα1β1异构体的结构分析
主要成果:
- 在不同功能状态下获得sGC的详细结构.
- 氧化与β1H-NOX域的结合会导致传感器模块的重新排列.
- 转换器模块将从曲转换为直形,激活催化模块.
结论:
- 这项研究揭示了由氧化激活sGC的逐步机制.
- 结构洞察力解释了NO结合如何增强sGC的酶活性.
- 这些发现为了解sGC在健康和疾病中的作用提供了基础.
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