3PQS

The crystal structures of porcine pathogen ApH87_TbpB

3PQS の概要

• エントリーDOI: 10.2210/pdb3pqs/pdb
• 関連するPDBエントリー: 3PQU
• 分子名称: transferrin-binding protein, GLYCEROL, CACODYLATE ION, ... (4 entities in total)
• 機能のキーワード: lipoprotein, transferrin receptor, iron acquisition, vaccine candidate, beta barrel, transferrin binding, transferrin, outermembrane, lipid binding protein
• 由来する生物種: Actinobacillus pleuropneumoniae (Haemophilus pleuropneumoniae)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 58871.04

構造登録者

Calmettes, C.,Moraes, T.F. (登録日: 2010-11-26, 公開日: 2011-02-02, 最終更新日: 2024-10-16)

主引用文献

Calmettes, C.,Yu, R.H.,Silva, L.P.,Curran, D.,Schriemer, D.C.,Schryvers, A.B.,Moraes, T.F.
Structural Variations within the Transferrin Binding Site on Transferrin-binding Protein B, TbpB.
J.Biol.Chem., 286:12683-12692, 2011

PubMed Abstract: Pathogenic bacteria acquire the essential element iron through specialized uptake pathways that are necessary in the iron-limiting environments of the host. Members of the Gram-negative Neisseriaceae and Pasteurellaceae families have adapted to acquire iron from the host iron binding glycoprotein, transferrin (Tf), through a receptor complex comprised of transferring-binding protein (Tbp) A and B. Because of the critical role they play in the host, these surface-exposed proteins are invariably present in clinical isolates and thus are considered prime vaccine targets. The specific interactions between TbpB and Tf are essential and ultimately might be exploited to create a broad-spectrum vaccine. In this study, we report the structure of TbpBs from two porcine pathogens, Actinobacillus pleuropneumoniae and suis. Paradoxically, despite a common Tf target, these swine related TbpBs show substantial sequence variation in their Tf-binding site. The TbpB structures, supported by docking simulations, surface plasmon resonance and hydrogen/deuterium exchange experiments with wild-type and mutant TbpBs, explain why there are structurally conserved elements within TbpB homologs despite major sequence variation that are required for binding Tf.

PubMed: 21297163
DOI: 10.1074/jbc.M110.206102

実験手法

X-RAY DIFFRACTION (2.1 Å)