6CUJ

Crystal structure of the C-terminal domain of neisserial heparin binding antigen (NHBA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Structures of NHBA elucidate a broadly conserved epitope identified by a vaccine induced antibody.

Maritan, M.Veggi, D.Cozzi, R.Dello Iacono, L.Bartolini, E.Lo Surdo, P.Maruggi, G.Spraggon, G.Bottomley, M.J.Malito, E.

(2018) PLoS One 13: e0201922-e0201922

  • DOI: https://doi.org/10.1371/journal.pone.0201922
  • Primary Citation of Related Structures:  
    5NYX, 5O1R, 6CUJ

  • PubMed Abstract: 

    Neisserial heparin binding antigen (NHBA) is one of three main recombinant protein antigens in 4CMenB, a vaccine for the prevention of invasive meningococcal disease caused by Neisseria meningitidis serogroup B. NHBA is a surface-exposed lipoprotein composed of a predicted disordered N-terminal region, an arginine-rich region that binds heparin, and a C-terminal domain that folds as an anti-parallel β-barrel and that upon release after cleavage by human proteases alters endothelial permeability. NHBA induces bactericidal antibodies in humans, and NHBA-specific antibodies elicited by the 4CMenB vaccine contribute to serum bactericidal activity, the correlate of protection. To better understand the structural bases of the human antibody response to 4CMenB vaccination and to inform antigen design, we used X-ray crystallography to elucidate the structures of two C-terminal fragments of NHBA, either alone or in complex with the Fab derived from the vaccine-elicited human monoclonal antibody 5H2, and the structure of the unbound Fab 5H2. The structures reveal details on the interaction between an N-terminal β-hairpin fragment and the β-barrel, and explain how NHBA is capable of generating cross-reactive antibodies through an extensive conserved conformational epitope that covers the entire C-terminal face of the β-barrel. By providing new structural information on a vaccine antigen and on the human immune response to vaccination, these results deepen our molecular understanding of 4CMenB, and might also aid future vaccine design projects.


  • Organizational Affiliation

    GSK, Siena, Italy.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gna2132
A, B
161Neisseria meningitidisMutation(s): 0 
Gene Names: gna2132nhbaA6J54_02980
UniProt
Find proteins for Q9JPP1 (Neisseria meningitidis)
Explore Q9JPP1 
Go to UniProtKB:  Q9JPP1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9JPP1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.03α = 90
b = 77.03β = 90
c = 57.53γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-26
    Type: Initial release
  • Version 1.1: 2023-10-04
    Changes: Data collection, Database references, Refinement description