Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Predict Membrane 

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 105.54 kDa 
• Atom Count: 7576 
• Modelled Residue Count: 943 
• Deposited Residue Count: 968 
• Unique protein chains: 1

3SZE

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

• PDB DOI: 10.2210/pdb3SZE/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli O157:H7 str. EDL933
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 
• Membrane Protein: Yes  mpstruc


• Deposited: 2011-07-18 Released: 2011-10-12 
• Deposition Author(s): Khan, S., Mian, H.S., Sandercock, L.E., Battaile, K.P., Lam, R., Chirgadze, N.Y., Pai, E.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.231 
• R-Value Work: 0.188 
• R-Value Observed: 0.191 

Literature

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

• PubMed: 21964244 
• DOI: 10.1016/j.jmb.2011.09.028
• Primary Citation of Related Structures:  
  3SZE


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine protease espP	A	968	Escherichia coli O157:H7 str. EDL933	Mutation(s): 1  Gene Names: ECO57PM78, espP, L7020 EC: 3.4.21 Membrane Entity: Yes
UniProt
Find proteins for Q7BSW5 (Escherichia coli O157:H7) Explore Q7BSW5  Go to UniProtKB:  Q7BSW5

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 88.34	α = 90
b = 88.34	β = 90
c = 311.533	γ = 90

Software Package:

Software Name	Purpose
BioCARS-developed	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-07-18 
• Released Date: 2011-10-12 
Deposition Author(s): Khan, S., Mian, H.S., Sandercock, L.E., Battaile, K.P., Lam, R., Chirgadze, N.Y., Pai, E.F.

Revision History  

• Version 1.0: 2011-10-12
  Type: Initial release
  
• Version 1.1: 2011-11-30
  Changes: Database references