7WQT image
Entry Detail
PDB ID:
7WQT
EMDB ID:
Keywords:
Title:
Cryo-EM structure of VWF D'D3 dimer complexed with D1D2 at 4.3 angstron resolution (VWF tube)
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2022-01-26
Release Date:
2022-05-25
Method Details:
Experimental Method:
Resolution:
4.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:von Willebrand antigen 2
Chain IDs:A, C (auth: B), I (auth: E), K (auth: F), M (auth: G), N (auth: H), O (auth: I), P (auth: J), Q (auth: K), R (auth: L), S (auth: M), T (auth: N), U (auth: O), V (auth: P), W (auth: Q), X (auth: R)
Chain Length:490
Number of Molecules:16
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:von Willebrand factor
Chain IDs:B (auth: a), D (auth: b), E (auth: C), F (auth: c), G (auth: D), H (auth: d), J (auth: e), L (auth: f), Y (auth: S), Z (auth: T), AA (auth: U), BA (auth: V), CA (auth: W), DA (auth: X), EA (auth: Y), FA (auth: Z)
Chain Length:490
Number of Molecules:16
Biological Source:Homo sapiens
Primary Citation
Structural basis of von Willebrand factor multimerization and tubular storage.
Blood 139 3314 3324 (2022)
PMID: 35148377 DOI: 10.1182/blood.2021014729

Abstact

The von Willebrand factor (VWF) propeptide (domains D1D2) is essential for the assembly of VWF multimers and its tubular storage in Weibel-Palade bodies. However, detailed molecular mechanism underlying this propeptide dependence is unclear. Here, we prepared Weibel-Palade body-like tubules using the N-terminal fragment of VWF and solved the cryo-electron microscopy structures of the tubule at atomic resolution. Detailed structural and biochemical analysis indicate that the propeptide forms a homodimer at acidic pH through the D2:D2 binding interface and then recruits 2 D'D3 domains, forming an intertwined D1D2D'D3 homodimer in essence. Stacking of these homodimers by the intermolecular D1:D2 interfaces brings 2 D3 domains face-to-face and facilitates their disulfide linkages and multimerization of VWF. Sequential stacking of these homodimers leads to a right-hand helical tubule for VWF storage. The clinically identified VWF mutations in the propeptide disrupted different steps of the assembling process, leading to diminished VWF multimers in von Willebrand diseases (VWD). Overall, these results indicate that the propeptide serves as a pH-sensing template for VWF multimerization and tubular storage. This sheds light on delivering normal propeptide as a template to rectify the defects in multimerization of VWD mutants.

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Primary Citation of related structures