Crystal structure of the cell-binding B oligomer of verotoxin-1 from E. coli

Experimental Data Snapshot

  • Resolution: 2.05 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.145 

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Crystal Structure of the Cell-Binding B Oligomer of Verotoxin-1 from E. Coli.

Stein, P.E.Boodhoo, A.Tyrrell, G.J.Brunton, J.L.Read, R.J.

(1992) Nature 355: 748

  • DOI: https://doi.org/10.1038/355748a0
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The Shiga toxin family, a group of cytotoxins associated with diarrhoeal diseases and the haemolytic uraemic syndrome, includes Shiga toxin from Shigella dysenteriae type 1 and verotoxins produced by enteropathogenic Escherichia coli. The family belongs to the A-B class of bacterial toxins, which includes the cholera toxin family, pertussis and diphtheria toxins. These toxins all have bipartite structures consisting of an enzymatic A subunit associated with a B oligomer which binds to specific cell-surface receptors, but their amino-acid sequences and pathogenic mechanisms differ. We have determined the crystal structure of the B oligomer of verotoxin-1 from E. coli. The structure unexpectedly resembles that of the B oligomer of the cholera toxin-like heat-labile enterotoxin from E. coli, despite the absence of detectable sequence similarity between these two proteins. This result implies a distant evolutionary relationship between the Shiga toxin and cholera toxin families. We suggest that the cell surface receptor-binding site lies in a cleft between adjacent subunits of the B pentamer, providing a potential target for drugs and vaccines to prevent toxin binding and effect.

  • Organizational Affiliation

    Department of Medical Microbiology and Infectious Diseases, University of Alberta, Edmonton, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
69Escherichia coliMutation(s): 0 
Find proteins for P69179 (Enterobacteria phage H19B)
Explore P69179 
Go to UniProtKB:  P69179
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69179
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.05 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.145 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.6α = 90
b = 102.4β = 90
c = 56.1γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-10-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance