4NT5
Crystal structure of human von Willebrand factor CTCK domain
Summary for 4NT5
| Entry DOI | 10.2210/pdb4nt5/pdb |
| Descriptor | von Willebrand factor, 2-acetamido-2-deoxy-beta-D-glucopyranose, ZINC ION, ... (5 entities in total) |
| Functional Keywords | cystine knot, dimerization of vwf, protein binding |
| Biological source | Homo sapiens (human) |
| Total number of polymer chains | 1 |
| Total formula weight | 12832.68 |
| Authors | Zhou, Y.F.,Springer, T.A. (deposition date: 2013-12-01, release date: 2014-01-01, Last modification date: 2024-11-06) |
| Primary citation | Zhou, Y.F.,Springer, T.A. Highly reinforced structure of a C-terminal dimerization domain in von Willebrand factor. Blood, 123:1785-1793, 2014 Cited by PubMed Abstract: The C-terminal cystine knot (CK) (CTCK) domain in von Willebrand factor (VWF) mediates dimerization of proVWF in the endoplasmic reticulum and is essential for long multimers required for hemostatic function. The CTCK dimer crystal structure reveals highly elongated monomers with 2 β-ribbons and 4 intra-chain disulfides, including 3 in the CK. Dimerization buries an extensive interface of 1500 Å(2) corresponding to 32% of the surface of each monomer and forms a super β-sheet and 3 inter-chain disulfides. The shape, dimensions, and N-terminal connections of the crystal structure agree perfectly with previous electron microscopic images of VWF dimeric bouquets with the CTCK dimer forming a down-curved base. The dimer interface is suited to resist hydrodynamic force and disulfide reduction. CKs in each monomer flank the 3 inter-chain disulfides, and their presence in β-structures with dense backbone hydrogen bonds creates a rigid, highly crosslinked interface. The structure reveals the basis for von Willebrand disease phenotypes and the fold and disulfide linkages for CTCK domains in diverse protein families involved in barrier function, eye and inner ear development, insect coagulation and innate immunity, axon guidance, and signaling in extracellular matrices. PubMed: 24394662DOI: 10.1182/blood-2013-11-523639 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (3.281 Å) |
Structure validation
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