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在生理条件下使用纳米比特/BRET对多个子结合的Wnt3a,Wnt5a和Wnt16的量化

Janine Wesslowski¹, Sadia Safi¹, Michelle Rottmann¹

¹Institute of Biological and Chemical Systems-Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.

|June 11, 2025

概括

了解Wnt信号选择性至关重要. 这项研究量化了Wnt-Frizzled相互作用,揭示了像LRP6这样的特定配对和共同受体如何控制细胞反应.

科学领域:

细胞生物学细胞生物学
分子信号传递是分子信号传递.
生物物理学的生物物理.

背景情况:

Wnt信号通路调节各种细胞过程.
在Wnt信号的特异性取决于Wnt-Frizzled (FZD) 受体相互作用,共同受体和细胞环境.
关于在生理条件下特定Wnt-FZD配对的生物物理性质的数据有限.

研究的目的:

为所有Wnt/FZD相互作用的生物物理性质提供全面的概述.
使用活细胞中的全长蛋白质量化量化Wnt-FZD结合亲缘关系.
阐明共同受体,特别是LRP6在调节Wnt-FZD结合中的作用.

主要方法:

使用光标记的Wnt蛋白 (Wnt3a,Wnt5a,Wnt16) 和表达HiBiT标记的Frizzled受体的细胞系.
在低受体表达水平的活细胞中使用实时NanoBRET分析.
研究了三元体Wnt-FZD-LRP6复合物的形成和特性.

主要成果:

使用实时NanoBRET量化了各种Wnt-FZD相互作用的结合亲缘关系.
证明LRP6影响Wnt-FZD-LRP6复合体内的结合亲和力.
提供了Wnt-Frizzled相互作用的详细生物物理特征.

结论:

特定的Wnt-FZD配对和共同受体参与是Wnt信号选择性的关键决定因素.
精确量化Wnt-FZD的结合特性有助于理解信号输出.
LRP6在Wnt-FZD结合亲和力中起着调节作用,影响信号特异性.

关键词:

美国GFP-Wntnt 这就是HiBiTT的意思.这是HiBiT-FZDD.在LRP6中使用LRP6.在NanoBiT/BRETET中使用.没有信号发送.在 Wnt-FZD 绑定.结合链受体的结合.

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