6N29

Crystal structure of monomeric von Willebrand Factor D`D3 assembly

6N29 の概要

• エントリーDOI: 10.2210/pdb6n29/pdb
• 分子名称: von Willebrand factor, 2-acetamido-2-deoxy-beta-D-glucopyranose, CALCIUM ION, ... (5 entities in total)
• 機能のキーワード: von willebrand factor, blood clotting
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 108098.18

構造登録者

Dong, X.,Arndt, J.W.,Springer, T.A. (登録日: 2018-11-12, 公開日: 2019-01-23, 最終更新日: 2024-10-16)

主引用文献

Dong, X.,Leksa, N.C.,Chhabra, E.S.,Arndt, J.W.,Lu, Q.,Knockenhauer, K.E.,Peters, R.T.,Springer, T.A.
The von Willebrand factor D'D3 assembly and structural principles for factor VIII binding and concatemer biogenesis.
Blood, 133:1523-1533, 2019

PubMed Abstract: D assemblies make up half of the von Willebrand factor (VWF), yet are of unknown structure. D1 and D2 in the prodomain and D'D3 in mature VWF at Golgi pH form helical VWF tubules in Weibel Palade bodies and template dimerization of D3 through disulfides to form ultralong VWF concatemers. D'D3 forms the binding site for factor VIII. The crystal structure of monomeric D'D3 with cysteine residues required for dimerization mutated to alanine was determined at an endoplasmic reticulum (ER)-like pH. The smaller C8-3, TIL3 (trypsin inhibitor-like 3), and E3 modules pack through specific interfaces as they wind around the larger, N-terminal, Ca-binding von Willebrand D domain (VWD) 3 module to form a wedge shape. D' with its TIL' and E' modules projects away from D3. The 2 mutated cysteines implicated in D3 dimerization are buried, providing a mechanism for protecting them against premature disulfide linkage in the ER, where intrachain disulfide linkages are formed. D3 dimerization requires co-association with D1 and D2, Ca, and Golgi-like acidic pH. Associated structural rearrangements in the C8-3 and TIL3 modules are required to expose cysteine residues for disulfide linkage. Our structure provides insight into many von Willebrand disease mutations, including those that diminish factor VIII binding, which suggest that factor VIII binds not only to the N-terminal TIL' domain of D' distal from D3 but also extends across 1 side of D3. The organizing principle for the D3 assembly has implications for other D assemblies and the construction of higher-order, disulfide-linked assemblies in the Golgi in both VWF and mucins.

PubMed: 30642920
DOI: 10.1182/blood-2018-10-876300

実験手法

X-RAY DIFFRACTION (2.5 Å)