Crystal structure of the passenger domain of the E. coli autotransporter EspP

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 

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Crystal Structure of the Passenger Domain of the Escherichia coli Autotransporter EspP.

Khan, S.Mian, H.S.Sandercock, L.E.Chirgadze, N.Y.Pai, E.F.

(2011) J Mol Biol 413: 985-1000

  • DOI: https://doi.org/10.1016/j.jmb.2011.09.028
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Autotransporters represent a large superfamily of known and putative virulence factors produced by Gram-negative bacteria. They consist of an N-terminal "passenger domain" responsible for the specific effector functions of the molecule and a C-terminal "β-domain" responsible for translocation of the passenger across the bacterial outer membrane. Here, we present the 2.5-Å crystal structure of the passenger domain of the extracellular serine protease EspP, produced by the pathogen Escherichia coli O157:H7 and a member of the serine protease autotransporters of Enterobacteriaceae (SPATEs). Like the previously structurally characterized SPATE passenger domains, the EspP passenger domain contains an extended right-handed parallel β-helix preceded by an N-terminal globular domain housing the catalytic function of the protease. Of note, however, is the absence of a second globular domain protruding from this β-helix. We describe the structure of the EspP passenger domain in the context of previous results and provide an alternative hypothesis for the function of the β-helix within SPATEs.

  • Organizational Affiliation

    Campbell Family Cancer Research Institute, Ontario Cancer Institute, University Health Network, Toronto Medical Discovery Tower, Toronto, Ontario, Canada M5G 1L7.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine protease espP968Escherichia coli O157:H7 str. EDL933Mutation(s): 1 
Gene Names: ECO57PM78espPL7020
EC: 3.4.21
Membrane Entity: Yes 
Find proteins for Q7BSW5 (Escherichia coli O157:H7)
Explore Q7BSW5 
Go to UniProtKB:  Q7BSW5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7BSW5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.34α = 90
b = 88.34β = 90
c = 311.533γ = 90
Software Package:
Software NamePurpose
BioCARS-developeddata 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: 2011-10-12
    Type: Initial release
  • Version 1.1: 2011-11-30
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references