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-Structure paper
| タイトル | Structural insights into Wnt/β-catenin signaling regulation by LGR4, R-spondin, and ZNRF3. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 8337, Year 2025 |
| 掲載日 | 2025年10月1日 |
著者 | Yuxuan Peng / Akiko Fujimura / Jinta Asami / Zhikuan Zhang / Toshiyuki Shimizu / Umeharu Ohto / ![]() |
| PubMed 要旨 | Leucine-rich repeat-containing G protein-coupled receptor 4 (LGR4) plays a critical role in regulating the wingless-related integration site (Wnt) signaling pathway and is essential for organ ...Leucine-rich repeat-containing G protein-coupled receptor 4 (LGR4) plays a critical role in regulating the wingless-related integration site (Wnt) signaling pathway and is essential for organ development and carcinogenesis. LGR4, along with its ligand R-spondin (RSPO), potentiates Wnt/β-catenin signaling by recruiting its signaling suppressor, E3 ligase Zinc and Ring Finger 3 (ZNRF3), and inducing its membrane clearance. However, detailed mechanisms underlying this process remain unknown. In this study, we present the cryo-electron microscopy structures of human LGR4, the LGR4-RSPO2 and LGR4-RSPO2-ZNRF3 complexes. Upon RSPO2 binding, LGR4 undergoes no significant conformational changes in its transmembrane and extracellular domain structures or their relative orientations. LGR4, RSPO2, and ZNRF3 assemble into a 2:2:2 complex with the ZNRF3 dimer enclosed at the center. This ternary arrangement and forced dimerization of ZNRF3 likely underpin how LGR4 and RSPO2 potentiate Wnt/β-catenin signaling by sequestering ZNRF3 from Wnt receptors and facilitating its auto-inactivation. This study provides a structural basis for understanding the regulatory mechanism of Wnt/β-catenin signaling through the LGR4-RSPO2-ZNRF3 pathway and may offer opportunities for future drug development targeting this axis. |
リンク | Nat Commun / PubMed:41034211 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.25 - 3.97 Å |
| 構造データ | EMDB-62218, PDB-9kb6: EMDB-62219, PDB-9kb7: EMDB-62220, PDB-9kb8: EMDB-62221, PDB-9kb9: |
| 化合物 | ![]() ChemComp-NAG: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / Wnt signal |
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