Crystal structure of Efb-C from Staphylococcus aureus

Experimental Data Snapshot

  • Resolution: 1.25 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 

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This is version 1.3 of the entry. See complete history


A structural basis for complement inhibition by Staphylococcus aureus.

Hammel, M.Sfyroera, G.Ricklin, D.Magotti, P.Lambris, J.D.Geisbrecht, B.V.

(2007) Nat Immunol 8: 430-437

  • DOI: https://doi.org/10.1038/ni1450
  • Primary Citation of Related Structures:  
    2GOM, 2GOX

  • PubMed Abstract: 

    To provide insight into bacterial suppression of complement-mediated immunity, we present here structures of a bacterial complement inhibitory protein, both free and bound to its complement target. The 1.25-A structure of the complement component C3-inhibitory domain of Staphylococcus aureus extracellular fibrinogen-binding protein (Efb-C) demonstrated a helical motif involved in complement regulation, whereas the 2.2-A structure of Efb-C bound to the C3d domain of human C3 allowed insight into the recognition of complement proteins by invading pathogens. Our structure-function studies provided evidence for a previously unrecognized mode of complement inhibition whereby Efb-C binds to native C3 and alters the solution conformation of C3 in a way that renders it unable to participate in successful 'downstream' activation of the complement response.

  • Organizational Affiliation

    Division of Cell Biology and Biophysics, School of Biological Sciences, University of Missouri at Kansas City, Kansas City, Missouri 64110, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fibrinogen-binding protein
A, B
61Staphylococcus aureus subsp. aureus Mu50Mutation(s): 0 
Gene Names: efb
Find proteins for P68799 (Staphylococcus aureus (strain Mu50 / ATCC 700699))
Explore P68799 
Go to UniProtKB:  P68799
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68799
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.25 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.598α = 90
b = 59.598β = 90
c = 45.634γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-20
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references