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Open data
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Basic information
Entry | Database: PDB / ID: 8tzs | ||||||||||||
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Title | Structure of human WLS | ||||||||||||
![]() | Protein wntless homolog | ||||||||||||
![]() | MEMBRANE PROTEIN | ||||||||||||
Function / homology | ![]() Wnt protein secretion / positive regulation of Wnt protein secretion / WNT ligand biogenesis and trafficking / cementum mineralization / hindbrain development / Wnt-protein binding / exocrine pancreas development / anterior/posterior axis specification / midbrain development / mesoderm formation ...Wnt protein secretion / positive regulation of Wnt protein secretion / WNT ligand biogenesis and trafficking / cementum mineralization / hindbrain development / Wnt-protein binding / exocrine pancreas development / anterior/posterior axis specification / midbrain development / mesoderm formation / positive regulation of Wnt signaling pathway / endomembrane system / intracellular protein transport / trans-Golgi network / Wnt signaling pathway / endocytic vesicle membrane / positive regulation of canonical Wnt signaling pathway / early endosome membrane / cytoplasmic vesicle / positive regulation of canonical NF-kappaB signal transduction / early endosome / Golgi membrane / endoplasmic reticulum membrane / Golgi apparatus / endoplasmic reticulum / extracellular exosome / identical protein binding / plasma membrane / cytosol Similarity search - Function | ||||||||||||
Biological species | ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.84 Å | ||||||||||||
![]() | Qi, X. / Hu, Q. / Li, X. | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Molecular basis of Wnt biogenesis, secretion, and Wnt7-specific signaling. Authors: Xiaofeng Qi / Qinli Hu / Nadia Elghobashi-Meinhardt / Tao Long / Hongwen Chen / Xiaochun Li / ![]() ![]() Abstract: Wnt proteins are enzymatically lipidated by Porcupine (PORCN) in the ER and bind to Wntless (WLS) for intracellular transport and secretion. Mechanisms governing the transfer of these low-solubility ...Wnt proteins are enzymatically lipidated by Porcupine (PORCN) in the ER and bind to Wntless (WLS) for intracellular transport and secretion. Mechanisms governing the transfer of these low-solubility Wnts from the ER to the extracellular space remain unclear. Through structural and functional analyses of Wnt7a, a crucial Wnt involved in central nervous system angiogenesis and blood-brain barrier maintenance, we have elucidated the principles of Wnt biogenesis and Wnt7-specific signaling. The Wnt7a-WLS complex binds to calreticulin (CALR), revealing that CALR functions as a chaperone to facilitate Wnt transfer from PORCN to WLS during Wnt biogenesis. Our structures, functional analyses, and molecular dynamics simulations demonstrate that a phospholipid in the core of Wnt-bound WLS regulates the association and dissociation between Wnt and WLS, suggesting a lipid-mediated Wnt secretion mechanism. Finally, the structure of Wnt7a bound to RECK, a cell-surface Wnt7 co-receptor, reveals how RECK engages the N-terminal domain of Wnt7a to activate Wnt7-specific signaling. | ||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 98.1 KB | Display | ![]() |
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PDB format | ![]() | 73.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.2 MB | Display | ![]() |
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Full document | ![]() | 1.2 MB | Display | |
Data in XML | ![]() | 27.3 KB | Display | |
Data in CIF | ![]() | 36.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 41768MC ![]() 8tzoC ![]() 8tzpC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
#1: Protein | Mass: 62317.973 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: WLS / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 800 nm |
Image recording | Electron dose: 60 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
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Processing
CTF correction | Type: NONE | ||||||||||||||||||||||||
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3D reconstruction | Resolution: 3.84 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 304150 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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