不同激素的TRPV3激活伴随着从瓦尼洛伊德部位的脂质解离
Kirill D Nadezhdin1, Arthur Neuberger1, Lena S Khosrof1
1Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA.
Science advances
|May 1, 2024
概括
结构揭示了四大麻 (THCV) 和2-aminoethoxydiphenylborane (2-APB) 如何激活TRPV3通道. 两种激动剂,尽管结合了不同的部位,但打开了道并取代了脂质,为TRPV3功能和药物设计提供了洞察力.
科学领域:
- 分子生物学分子生物学
- 结构生物学是结构生物学.
- 生物物理学的生物物理.
背景情况:
- 暂时受体潜在化物3 (TRPV3) 通道被温度和连接体激活.
- 之前的结构研究捕获了TRPV3热激活,但未捕获野生类型通道中激素诱导的开放.
- 野生型TRPV3通道的激素诱导开放仍然在结构上没有特征.
研究的目的:
- 阐明野生类型人类TRPV3通道开放和被激动剂无活化的结构机制.
- 描述四大麻素 (THCV) 和2-氨基二二乙 (2-APB) 的结合部位和全性通路.
- 了解脂质在TRPV3通道关中的作用.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定高分辨率结构.
- 对与THCV和2-APB复合的野生类型人类TRPV3的分析.
- 结构比较,以了解连接体结合和形状变化.
主要成果:
- 冷-EM结构显示THCV (瓦尼洛状位) 和2-APB (S1-S4基和ARD-TMD链接器) 的独特结合点.
- 这两种激动剂都会诱导类似的孔隙开放,并导致脂质从化物部位解离.
- 不同的激动剂在相似的功能结果上趋同,这表明共享的全性机制.
结论:
- 小分子激动剂通过不同的但融合的全性通路激活TRPV3.
- 脂质解离是激素诱导的TRPV3激活的一个常见特征.
- 这些发现为设计向TRPV3的药物和理解脂质通道相互作用提供了结构框架.
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