The crystal structure of transferrin binding protein B (TbpB) from Neisseria meningitidis serogroup B

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.255 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural basis for iron piracy by pathogenic Neisseria.

Noinaj, N.Easley, N.C.Oke, M.Mizuno, N.Gumbart, J.Boura, E.Steere, A.N.Zak, O.Aisen, P.Tajkhorshid, E.Evans, R.W.Gorringe, A.R.Mason, A.B.Steven, A.C.Buchanan, S.K.

(2012) Nature 483: 53-58

  • DOI: https://doi.org/10.1038/nature10823
  • Primary Citation of Related Structures:  
    3SKP, 3V83, 3V89, 3V8U, 3V8X

  • PubMed Abstract: 

    Neisseria are obligate human pathogens causing bacterial meningitis, septicaemia and gonorrhoea. Neisseria require iron for survival and can extract it directly from human transferrin for transport across the outer membrane. The transport system consists of TbpA, an integral outer membrane protein, and TbpB, a co-receptor attached to the cell surface; both proteins are potentially important vaccine and therapeutic targets. Two key questions driving Neisseria research are how human transferrin is specifically targeted, and how the bacteria liberate iron from transferrin at neutral pH. To address these questions, we solved crystal structures of the TbpA-transferrin complex and of the corresponding co-receptor TbpB. We characterized the TbpB-transferrin complex by small-angle X-ray scattering and the TbpA-TbpB-transferrin complex by electron microscopy. Our studies provide a rational basis for the specificity of TbpA for human transferrin, show how TbpA promotes iron release from transferrin, and elucidate how TbpB facilitates this process.

  • Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transferrin binding-protein B
A, B
717Neisseria meningitidis serogroup BMutation(s): 0 
Gene Names: tbpB
Membrane Entity: Yes 
Find proteins for Q9K0V0 (Neisseria meningitidis serogroup B (strain MC58))
Explore Q9K0V0 
Go to UniProtKB:  Q9K0V0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9K0V0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.255 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.03α = 90
b = 82.133β = 106.07
c = 111.314γ = 90
Software Package:
Software NamePurpose
SERGUIdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-15
    Type: Initial release
  • Version 1.1: 2012-02-29
    Changes: Database references
  • Version 1.2: 2012-04-18
    Changes: Database references