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-Structure paper
タイトル | Structural basis of Frizzled 4 in recognition of Dishevelled 2 unveils mechanism of WNT signaling activation. |
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ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 7644, Year 2024 |
掲載日 | 2024年9月2日 |
著者 | Yu Qian / Zhengxiong Ma / Zhenmei Xu / Yaning Duan / Yangjie Xiong / Ruixue Xia / Xinyan Zhu / Zongwei Zhang / Xinyu Tian / Han Yin / Jian Liu / Jing Song / Yang Lu / Anqi Zhang / Changyou Guo / Lihua Jin / Woo Jae Kim / Jiyuan Ke / Fei Xu / Zhiwei Huang / Yuanzheng He / |
PubMed 要旨 | WNT signaling is fundamental in development and homeostasis, but how the Frizzled receptors (FZDs) propagate signaling remains enigmatic. Here, we present the cryo-EM structure of FZD4 engaged with ...WNT signaling is fundamental in development and homeostasis, but how the Frizzled receptors (FZDs) propagate signaling remains enigmatic. Here, we present the cryo-EM structure of FZD4 engaged with the DEP domain of Dishevelled 2 (DVL2), a key WNT transducer. We uncover a distinct binding mode where the DEP finger-loop inserts into the FZD4 cavity to form a hydrophobic interface. FZD4 intracellular loop 2 (ICL2) additionally anchors the complex through polar contacts. Mutagenesis validates the structural observations. The DEP interface is highly conserved in FZDs, indicating a universal mechanism by which FZDs engage with DVLs. We further reveal that DEP mimics G-protein/β-arrestin/GRK to recognize an active conformation of receptor, expanding current GPCR engagement models. Finally, we identify a distinct FZD4 dimerization interface. Our findings delineate the molecular determinants governing FZD/DVL assembly and propagation of WNT signaling, providing long-sought answers underlying WNT signal transduction. |
リンク | Nat Commun / PubMed:39223191 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.47 - 3.53 Å |
構造データ | EMDB-37646, PDB-8wm9: EMDB-37647, PDB-8wma: |
化合物 | ChemComp-Y01: |
由来 |
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キーワード | MEMBRANE PROTEIN / GPCR complex |