2QOM

The crystal structure of the E.coli EspP autotransporter Beta-domain.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.258 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Autotransporter structure reveals intra-barrel cleavage followed by conformational changes.

Barnard, T.J.Dautin, N.Lukacik, P.Bernstein, H.D.Buchanan, S.K.

(2007) Nat.Struct.Mol.Biol. 14: 1214-1220

  • DOI: 10.1038/nsmb1322

  • PubMed Abstract: 
  • Autotransporters are virulence factors produced by Gram-negative bacteria. They consist of two domains, an N-terminal 'passenger' domain and a C-terminal beta-domain. beta-domains form beta-barrel structures in the outer membrane while passenger doma ...

    Autotransporters are virulence factors produced by Gram-negative bacteria. They consist of two domains, an N-terminal 'passenger' domain and a C-terminal beta-domain. beta-domains form beta-barrel structures in the outer membrane while passenger domains are translocated into the extracellular space. In some autotransporters, the two domains are separated by proteolytic cleavage. Using X-ray crystallography, we solved the 2.7-A structure of the post-cleavage state of the beta-domain of EspP, an autotransporter produced by Escherichia coli strain O157:H7. The structure consists of a 12-stranded beta-barrel with the passenger domain-beta-domain cleavage junction located inside the barrel pore, approximately midway between the extracellular and periplasmic surfaces of the outer membrane. The structure reveals an unprecedented intra-barrel cleavage mechanism and suggests that two conformational changes occur in the beta-domain after cleavage, one conferring increased stability on the beta-domain and another restricting access to the barrel pore.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine protease espP
A, B
285Escherichia coli O157:H7Mutation(s): 0 
Gene Names: espP
EC: 3.4.21.-
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Outer Membrane Autotransporters
Protein: 
EspP autotransporter, post-cleavage state
Find proteins for Q7BSW5 (Escherichia coli O157:H7)
Go to UniProtKB:  Q7BSW5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.258 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 84.951α = 90.00
b = 53.298β = 103.57
c = 102.418γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Derived calculations, Source and taxonomy, Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description