The factor H binding protein (fHbp) is a 27-kDa membrane-anchored lipoprotein of Neisseria meningitidis that allows the survival of the bacterium in human plasma; it is also a major component of a universal vaccine against meningococcus B. In this study, we used nuclear magnetic resonance spectroscopy, mutagenesis, and in silico modeling to map the epitope recognized by MAb502, a bactericidal monoclonal antibody elicited by fHbp. The data show that the antibody recognizes a conformational epitope within a well-defined area of the immunodominant C-terminal domain of the protein that is formed by two loops connecting different β-strands of a β-barrel and a short α-helix brought in spatial proximity by the protein folding. The identification of the protective epitopes of fHbp is an important factor for understanding the mechanism(s) of an effective immune response and provides valuable guidelines for designing variants of the protein able to induce broadly protective immunity. © 2008.

Epitope Mapping of a Bactericidal Monoclonal Antibody against the Factor H Binding Protein of Neisseria meningitidis / Maria Scarselli; Francesca Cantini; Laura Santini; Daniele Veggi; Sara Dragonetti; Claudio Donati; Silvana Savino; Marzia M Giuliani; Maurizio Comanducci; Federica Di Marcello; Giacomo Romagnoli; Mariagrazia Pizza; Lucia Banci; Rino Rappuoli. - In: JOURNAL OF MOLECULAR BIOLOGY. - ISSN 0022-2836. - ELETTRONICO. - 386:(2009), pp. 97-108. [10.1016/j.jmb.2008.12.005]

Epitope Mapping of a Bactericidal Monoclonal Antibody against the Factor H Binding Protein of Neisseria meningitidis.

CANTINI, FRANCESCA;BANCI, LUCIA;
2009

Abstract

The factor H binding protein (fHbp) is a 27-kDa membrane-anchored lipoprotein of Neisseria meningitidis that allows the survival of the bacterium in human plasma; it is also a major component of a universal vaccine against meningococcus B. In this study, we used nuclear magnetic resonance spectroscopy, mutagenesis, and in silico modeling to map the epitope recognized by MAb502, a bactericidal monoclonal antibody elicited by fHbp. The data show that the antibody recognizes a conformational epitope within a well-defined area of the immunodominant C-terminal domain of the protein that is formed by two loops connecting different β-strands of a β-barrel and a short α-helix brought in spatial proximity by the protein folding. The identification of the protective epitopes of fHbp is an important factor for understanding the mechanism(s) of an effective immune response and provides valuable guidelines for designing variants of the protein able to induce broadly protective immunity. © 2008.
2009
386
97
108
Maria Scarselli; Francesca Cantini; Laura Santini; Daniele Veggi; Sara Dragonetti; Claudio Donati; Silvana Savino; Marzia M Giuliani; Maurizio Comandu...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/348426
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