ジャーナル: Nat Commun / 年: 2025 タイトル: Structural insights into the LGR4-RSPO2-ZNRF3 complexes regulating WNT/β-catenin signaling. 著者: Lu Wang / Fangzheng Hu / Qianqian Cui / Huarui Qiao / Lingyun Li / Tengjie Geng / Yuying Li / Zengchao Sun / Siyu Zhou / Zhongyun Lan / Shaojue Guo / Ying Hu / Jiqiu Wang / Qilun Yang / Zenan ...著者: Lu Wang / Fangzheng Hu / Qianqian Cui / Huarui Qiao / Lingyun Li / Tengjie Geng / Yuying Li / Zengchao Sun / Siyu Zhou / Zhongyun Lan / Shaojue Guo / Ying Hu / Jiqiu Wang / Qilun Yang / Zenan Wang / Yuanyuan Dai / Yong Geng / 要旨: WNT/β-catenin signaling plays key roles in development and cancer. ZNRF3/RNF43 modulates Frizzleds through ubiquitination, dampening WNT/β-catenin signaling. Conversely, RSPO1-4 binding to LGR4-6 ...WNT/β-catenin signaling plays key roles in development and cancer. ZNRF3/RNF43 modulates Frizzleds through ubiquitination, dampening WNT/β-catenin signaling. Conversely, RSPO1-4 binding to LGR4-6 and ZNRF3/RNF43 enhances WNT/β-catenin signaling. Here, we elucidate the overall landscape of architectures in multiple LGR4, RSPO2, and ZNRF3 assemblies, showcasing varying stoichiometries and arrangements. These structures reveal that LGR4 and RSPO2 capture distinct states of ZNRF3. The intrinsic heterogeneity of the LGR4-RSPO2-ZNRF3 assembly is influenced by LGR4 content. Particularly, in the assembly complex with a 2:2:2 ratio, two LGR4 protomers induce and stabilize the inactive state of ZNRF3, characterized by a wide inward-open conformation of two transmembrane helices (TM helices). This specific assembly promotes a stable complex, facilitating LGR4-induced endocytosis of ZNRF3. In contrast, the active dimeric ZNRF3, bound by a single LGR4, adopts a coiled-coil TM helices conformation and dimerization of RING domains. Our findings unveil how LGR4 content mediates diverse assemblies, leading to conformational rearrangements in ZNRF3 to regulate WNT/β-catenin signaling, and provide a structural foundation for drug development targeting Wnt-driven cancers.
R-spondin-2 / Cysteine-rich and single thrombospondin domain-containing protein 2 / Cristin-2 / mCristin-2 / Roof ...Cysteine-rich and single thrombospondin domain-containing protein 2 / Cristin-2 / mCristin-2 / Roof plate-specific spondin-2
分子量: 11675.430 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: Rspo2 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q8BFU0
Has protein modification
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実験情報
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実験
実験
手法: 電子顕微鏡法
EM実験
試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法
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試料調製
構成要素
名称: the pentamer B complex of LGR4-RSPO2-ZNRF3(RING) / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT