EPISODE · Aug 27, 2026 · 20 MIN
1497-人源CNNM4镁离子转运蛋白的结构与机制
from 聊聊Sci
这篇文章介绍了一项关于人类CNNM4蛋白质的研究，揭示了这种关键镁离子转运蛋白的分子结构与工作机制。通过冷冻电子显微镜技术，研究人员首次捕捉到了该蛋白在“向外开放”和“闭合”两种不同状态下的高分辨率图像。研究发现，CNNM4 并非此前认为的简单二聚体，而是以一种独特的四聚体形式存在，且这种结构的稳定性依赖于镁-ATP（MgATP）的结合。此外，研究还识别出了一个酸性补丁区域，它可能作为细胞内镁离子的感应器，通过感知浓度变化来调节离子的转运活性。该成果为理解人体如何维持镁离子平衡提供了核心理论框架，并为治疗相关的生理疾病和遗传病提供了潜在的结构基础。References:Bai Z, Zhou X E, Lü W, et al. Dynamic dimer-of-dimers architecture defines Mg2+ transport in human CNNM4[J]. Cell, 2026.前往小宇宙评论区与主播互动
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1497-人源CNNM4镁离子转运蛋白的结构与机制
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