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-Structure paper
タイトル | Cryo-EM structure of human Wntless in complex with Wnt3a. |
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ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 4541, Year 2021 |
掲載日 | 2021年7月27日 |
著者 | Qing Zhong / Yanyu Zhao / Fangfei Ye / Zaiyu Xiao / Gaoxingyu Huang / Meng Xu / Yuanyuan Zhang / Xiechao Zhan / Ke Sun / Zhizhi Wang / Shanshan Cheng / Shan Feng / Xiuxiu Zhao / Jizhong Zhang / Peilong Lu / Wenqing Xu / Qiang Zhou / Dan Ma / |
PubMed 要旨 | Wntless (WLS), an evolutionarily conserved multi-pass transmembrane protein, is essential for secretion of Wnt proteins. Wnt-triggered signaling pathways control many crucial life events, whereas ...Wntless (WLS), an evolutionarily conserved multi-pass transmembrane protein, is essential for secretion of Wnt proteins. Wnt-triggered signaling pathways control many crucial life events, whereas aberrant Wnt signaling is tightly associated with many human diseases including cancers. Here, we report the cryo-EM structure of human WLS in complex with Wnt3a, the most widely studied Wnt, at 2.2 Å resolution. The transmembrane domain of WLS bears a GPCR fold, with a conserved core cavity and a lateral opening. Wnt3a interacts with WLS at multiple interfaces, with the lipid moiety on Wnt3a traversing a hydrophobic tunnel of WLS transmembrane domain and inserting into membrane. A β-hairpin of Wnt3a containing the conserved palmitoleoylation site interacts with WLS extensively, which is crucial for WLS-mediated Wnt secretion. The flexibility of the Wnt3a loop/hairpin regions involved in the multiple binding sites indicates induced fit might happen when Wnts are bound to different binding partners. Our findings provide important insights into the molecular mechanism of Wnt palmitoleoylation, secretion and signaling. |
リンク | Nat Commun / PubMed:34315898 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.2 Å |
構造データ | EMDB-30827, PDB-7drt: |
化合物 | ChemComp-PAM: ChemComp-PCW: ChemComp-CLR: ChemComp-LPE: ChemComp-HOH: |
由来 |
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キーワード | MEMBRANE PROTEIN / Wnt signaling; Wnt secretion; WLS; Wnt3a; cryo-EM; palmitoleoylation; membrane protein |