2MTC

Structure of decorin binding protein A from strain N40 of Borrelia burgdorferi

2MTC の概要

• エントリーDOI: 10.2210/pdb2mtc/pdb
• 関連するPDBエントリー: 2MTD
• NMR情報: BMRB: 25156
• 分子名称: Decorin-binding protein A (1 entity in total)
• 機能のキーワード: adhesin, glycosaminoglycan-binding protein, lipoprotein, protein binding
• 由来する生物種: Borrelia burgdorferi
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 18291.87

構造登録者

Wang, X.,Morgan, A. (登録日: 2014-08-16, 公開日: 2015-03-25, 最終更新日: 2024-11-20)

主引用文献

Morgan, A.M.,Wang, X.
Structural mechanisms underlying sequence-dependent variations in GAG affinities of decorin binding protein A, a Borrelia burgdorferi adhesin.
Biochem.J., 467:439-451, 2015

PubMed Abstract: Decorin-binding protein A (DBPA) is an important surface adhesin of the bacterium Borrelia burgdorferi, the causative agent of Lyme disease. DBPA facilitates the bacteria's colonization of human tissue by adhering to glycosaminoglycan (GAG), a sulfated polysaccharide. Interestingly, DBPA sequence variation among different strains of Borrelia spirochetes is high, resulting in significant differences in their GAG affinities. However, the structural mechanisms contributing to these differences are unknown. We determined the solution structures of DBPAs from strain N40 of B. burgdorferi and strain PBr of Borrelia garinii, two DBPA variants whose GAG affinities deviate significantly from strain B31, the best characterized version of DBPA. Our structures revealed that significant differences exist between PBr DBPA and B31/N40 DBPAs. In particular, the C-terminus of PBr DBPA, unlike C-termini from B31 and N40 DBPAs, is positioned away from the GAG-binding pocket and the linker between helices one and two of PBr DBPA is highly structured and retracted from the GAG-binding pocket. The repositioning of the C-terminus allowed the formation of an extra GAG-binding epitope in PBr DBPA and the retracted linker gave GAG ligands more access to the GAG-binding epitopes than other DBPAs. Characterization of GAG ligands' interactions with wild-type (WT) PBr and mutants confirmed the importance of the second major GAG-binding epitope and established the fact that the two epitopes are independent of one another and the new epitope is as important to GAG binding as the traditional epitope.

PubMed: 25695518
DOI: 10.1042/BJ20141201

実験手法

SOLUTION NMR