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- PDB-8xft: LGR4-RSPO2-ZNRF3(1:1:1) -

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Basic information

Entry
Database: PDB / ID: 8xft
TitleLGR4-RSPO2-ZNRF3(1:1:1)
Components
  • E3 ubiquitin-protein ligase ZNRF3
  • Leucine-rich repeat-containing G-protein coupled receptor 4
  • MB52
  • R-spondin-2
KeywordsMEMBRANE PROTEIN / LGR4 / ZNRF3 / 1:1:1
Function / homology
Function and homology information


trachea cartilage morphogenesis / negative regulation of odontogenesis of dentin-containing tooth / lung growth / regulation of Wnt signaling pathway, planar cell polarity pathway / metanephric glomerulus development / metanephric nephron tubule morphogenesis / Wnt receptor catabolic process / epithelial cell proliferation involved in renal tubule morphogenesis / negative regulation of non-canonical Wnt signaling pathway / protein-hormone receptor activity ...trachea cartilage morphogenesis / negative regulation of odontogenesis of dentin-containing tooth / lung growth / regulation of Wnt signaling pathway, planar cell polarity pathway / metanephric glomerulus development / metanephric nephron tubule morphogenesis / Wnt receptor catabolic process / epithelial cell proliferation involved in renal tubule morphogenesis / negative regulation of non-canonical Wnt signaling pathway / protein-hormone receptor activity / intestinal stem cell homeostasis / negative regulation of toll-like receptor signaling pathway / BMP receptor binding / positive regulation of branching involved in ureteric bud morphogenesis / male genitalia development / bone remodeling / dopaminergic neuron differentiation / frizzled binding / embryonic forelimb morphogenesis / digestive tract development / embryonic hindlimb morphogenesis / limb development / negative regulation of cold-induced thermogenesis / negative regulation of cytokine production / epithelial tube branching involved in lung morphogenesis / bone mineralization / positive regulation of Wnt signaling pathway / hair follicle development / canonical Wnt signaling pathway / Regulation of FZD by ubiquitination / stem cell proliferation / circadian regulation of gene expression / negative regulation of canonical Wnt signaling pathway / G protein-coupled receptor activity / RING-type E3 ubiquitin transferase / Wnt signaling pathway / ubiquitin-protein transferase activity / osteoblast differentiation / ubiquitin protein ligase activity / transmembrane signaling receptor activity / positive regulation of canonical Wnt signaling pathway / heparin binding / ubiquitin-dependent protein catabolic process / spermatogenesis / protein ubiquitination / signaling receptor binding / innate immune response / cell surface / extracellular space / extracellular region / zinc ion binding / plasma membrane
Similarity search - Function
E3 ubiquitin-protein ligase ZNRF3, Zinc finger, RING-type / ZNRF-3, ectodomain / ZNRF-3 Ectodomain / R-spondin, Fu-CRD domain / : / Furin-like repeat, cysteine-rich / : / Glycoprotein hormone receptor family / Ring finger domain / Leucine rich repeat N-terminal domain ...E3 ubiquitin-protein ligase ZNRF3, Zinc finger, RING-type / ZNRF-3, ectodomain / ZNRF-3 Ectodomain / R-spondin, Fu-CRD domain / : / Furin-like repeat, cysteine-rich / : / Glycoprotein hormone receptor family / Ring finger domain / Leucine rich repeat N-terminal domain / Leucine-rich repeat N-terminal domain / Leucine rich repeat N-terminal domain / Thrombospondin type-1 (TSP1) repeat superfamily / Thrombospondin type-1 (TSP1) repeat profile. / Thrombospondin type 1 repeats / Thrombospondin type-1 (TSP1) repeat / Leucine Rich Repeat / Leucine-rich repeats, bacterial type / Leucine-rich repeat, SDS22-like subfamily / Furin-like repeat / Furin-like repeats / Leucine rich repeat / Leucine-rich repeat, typical subtype / Leucine-rich repeats, typical (most populated) subfamily / Leucine-rich repeat profile. / Ring finger / Growth factor receptor cysteine-rich domain superfamily / Leucine-rich repeat / Leucine-rich repeat domain superfamily / Zinc finger RING-type profile. / Zinc finger, RING-type / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / Zinc finger, RING/FYVE/PHD-type
Similarity search - Domain/homology
R-spondin-2 / Leucine-rich repeat-containing G-protein coupled receptor 4 / E3 ubiquitin-protein ligase ZNRF3
Similarity search - Component
Biological speciesHomo sapiens (human)
Camelus bactrianus (Bactrian camel)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.24 Å
AuthorsLu, W. / Yong, G.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nat Commun / Year: 2025
Title: Structural insights into the LGR4-RSPO2-ZNRF3 complexes regulating WNT/β-catenin signaling.
Authors: 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 / ...Authors: 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 /
Abstract: 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.
History
DepositionDec 14, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 4, 2024Provider: repository / Type: Initial release
Revision 1.1Jun 18, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Leucine-rich repeat-containing G-protein coupled receptor 4
C: E3 ubiquitin-protein ligase ZNRF3
E: MB52
G: R-spondin-2


Theoretical massNumber of molelcules
Total (without water)293,3184
Polymers293,3184
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Leucine-rich repeat-containing G-protein coupled receptor 4 / G-protein coupled receptor 48


Mass: 104565.656 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: LGR4, GPR48 / Production host: Homo sapiens (human) / References: UniProt: Q9BXB1
#2: Protein E3 ubiquitin-protein ligase ZNRF3


Mass: 100703.906 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ZNRF3 / Production host: Homo sapiens (human) / References: UniProt: Q9ULT6
#3: Antibody MB52


Mass: 59692.801 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Camelus bactrianus (Bactrian camel) / Production host: Escherichia coli (E. coli)
#4: Protein R-spondin-2


Mass: 28355.986 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RSPO2 / Production host: Homo sapiens (human) / References: UniProt: Q6UXX9
Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: LGR4-RSPO2-ZNRF3(1:1:1) / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Tecnai F30 / Image courtesy: FEI Company
MicroscopyModel: FEI TECNAI F30
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 1.944 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.18.2_3874: / Category: model refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.24 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 1046324 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0038934
ELECTRON MICROSCOPYf_angle_d0.51512114
ELECTRON MICROSCOPYf_dihedral_angle_d10.5743212
ELECTRON MICROSCOPYf_chiral_restr0.0421393
ELECTRON MICROSCOPYf_plane_restr0.0031541

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