5UR8

Human antibody fragment (Fab) to meningococcal Factor H binding protein

  • Classification: IMMUNE SYSTEM
  • Expression System: Escherichia coli BL21(DE3)

  • Deposited: 2017-02-09 Released: 2018-02-14 
  • Deposition Author(s): Beernink, P.T.
  • Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.755 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure reveals vaccine elicited bactericidal human antibody targeting a conserved epitope on meningococcal fHbp.

Lopez-Sagaseta, J.Beernink, P.T.Bianchi, F.Santini, L.Frigimelica, E.Lucas, A.H.Pizza, M.Bottomley, M.J.

(2018) Nat Commun 9: 528-528

  • DOI: 10.1038/s41467-018-02827-7
  • Primary Citation of Related Structures:  

  • 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 vir ...

    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.


    Organizational Affiliation

    Immunobiology and Vaccine Development, UCSF Benioff Children's Hospital, 5700 Martin Luther King Jr. Way, Oakland, CA, 94609, USA.,GSK Vaccines, 14200 Shady Grove Road, Rockville, MD, 20817, USA. matthew.j.bottomley@gsk.com.,GSK Vaccines srl, Via Fiorentina 1, 53100, Siena, Italy. jlopez.sagaseta@gmail.com.,GSK Vaccines srl, Via Fiorentina 1, 53100, Siena, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
human immunoglobulin gamma, heavy chain Fd fragment
A
235N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
human immunoglobulin gamma, kappa light chain
B
217N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.755 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.198 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 131.900α = 90.00
b = 131.900β = 90.00
c = 90.381γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
iMOSFLMdata reduction
PHENIXrefinement
SCALAdata scaling
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2017-02-09 
  • Released Date: 2018-02-14 
  • Deposition Author(s): Beernink, P.T.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesR01AI099125

Revision History 

  • Version 1.0: 2018-02-14
    Type: Initial release
  • Version 1.1: 2018-02-21
    Type: Database references