5O14

Co-crystal structure of a cross-reactive bactericidal human antibody targeting meningococcal vaccine antigen factor H binding protein

5O14 の概要

• エントリーDOI: 10.2210/pdb5o14/pdb
• 分子名称: Factor H binding protein variant 1.1, Fab 1A12 Heavy Chain, Fab 1A12 Light Chain, ... (6 entities in total)
• 機能のキーワード: human fab, factor h binding protein, outer membrane, infection, immune system
• 由来する生物種: Neisseria meningitidis serogroup B (strain MC58); 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 153920.80

構造登録者

Lopez-Sagaseta, J. (登録日: 2017-05-18, 公開日: 2018-02-14, 最終更新日: 2024-11-13)

主引用文献

Lopez-Sagaseta, J.,Beernink, P.T.,Bianchi, F.,Santini, L.,Frigimelica, E.,Lucas, A.H.,Pizza, M.,Bottomley, M.J.
Crystal structure reveals vaccine elicited bactericidal human antibody targeting a conserved epitope on meningococcal fHbp.
Nat Commun, 9:528-528, 2018

PubMed Abstract: Data obtained recently in the United Kingdom following a nationwide infant immunization program against serogroup B Neisseria meningitidis (MenB) reported >80% 4CMenB vaccine-mediated protection. Factor H-binding protein (fHbp) is a meningococcal virulence factor and a component of two new MenB vaccines. Here, we investigated the structural bases underlying the fHbp-dependent protective antibody response in humans, which might inform future antigen design efforts. We present the co-crystal structure of a human antibody Fab targeting fHbp. The vaccine-elicited Fab 1A12 is cross-reactive and targets an epitope highly conserved across the repertoire of three naturally occurring fHbp variants. The free Fab structure highlights conformational rearrangements occurring upon antigen binding. Importantly, 1A12 is bactericidal against MenB strains expressing fHbp from all three variants. Our results reveal important immunological features potentially contributing to the broad protection conferred by fHbp vaccination. Our studies fuel the rationale of presenting conserved protein epitopes when developing broadly protective vaccines.

PubMed: 29410413
DOI: 10.1038/s41467-018-02827-7

実験手法

X-RAY DIFFRACTION (2.195 Å)