一个广泛的热受体在 myriapods 的结构和功能
Xiaoying Chen1,2,3, Licheng Yuan4, Han Wen5,6,7,8,9
1Kidney Disease Center of the First Affiliated Hospital and Department of Biophysics, Zhejiang University School of Medicine, Hangzhou, China.
Nature structural & molecular biology
|February 26, 2025
概括
宽范围热受体1 (BRTNaC1) 离子通道是由热和质子激活的. 这项研究揭示了BRTNaC1的结构和封闭机制,揭示了温度和连接物如何控制其功能.
科学领域:
- 离子通道生物物理学
- 结构生物学是结构生物学.
- 足动物生理学 足动物生理学
背景情况:
- 宽范围热受体1 (BRTNaC1) 是一种热激活的离子通道,被确定在脚动物中.
- 已知其在低细胞外pH值时通过热激活,但其结构基础和封闭机制尚不清楚.
研究的目的:
- 确定BRTNaC1在apo,质子诱导和加热状态下的冷电子显微镜 (cryo-EM) 结构.
- 为了阐明质子和热门的分子机制.
- 为了确定丸激素抑制的结构性决定因素.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于结构的确定.
- 用于功能分析的补丁录音.
- 分子动力学 (MD) 模拟用于机械洞察力.
主要成果:
- 在多个功能状态下确定BRTNaC1的高分辨率冷EM结构.
- 揭示了一种用于质子激活的"扭动手腕"机制.
- 鉴定了热引起的构造变化,包括跨膜螺旋旋转和转移,导致通道开放.
- 发现了四种关键残留物,它们调解了丸激素抑制BRTNaC1.1.的作用.
结论:
- 在BRTNaC1.1中建立了质子和温度门的结构基础.
- 提供了对环境因素和配体如何调节离子通道活性的分子理解.
- 开辟了进一步研究TRP通道功能和调节的途径.
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