3GR5

Periplasmic domain of the outer membrane secretin EscC from enteropathogenic E.coli (EPEC)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A conserved structural motif mediates formation of the periplasmic rings in the type III secretion system.

Spreter, T.Yip, C.K.Sanowar, S.Andre, I.Kimbrough, T.G.Vuckovic, M.Pfuetzner, R.A.Deng, W.Yu, A.C.Finlay, B.B.Baker, D.Miller, S.I.Strynadka, N.C.

(2009) Nat.Struct.Mol.Biol. 16: 468-476

  • DOI: 10.1038/nsmb.1603
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The type III secretion system (T3SS) is a macromolecular 'injectisome' that allows bacterial pathogens to transport virulence proteins into the eukaryotic host cell. This macromolecular complex is composed of connected ring-like structures that span ...

    The type III secretion system (T3SS) is a macromolecular 'injectisome' that allows bacterial pathogens to transport virulence proteins into the eukaryotic host cell. This macromolecular complex is composed of connected ring-like structures that span both bacterial membranes. The crystal structures of the periplasmic domain of the outer membrane secretin EscC and the inner membrane protein PrgH reveal the conservation of a modular fold among the three proteins that form the outer membrane and inner membrane rings of the T3SS. This leads to the hypothesis that this conserved fold provides a common ring-building motif that allows for the assembly of the variably sized outer membrane and inner membrane rings characteristic of the T3SS. Using an integrated structural and experimental approach, we generated ring models for the periplasmic domain of EscC and placed them in the context of the assembled T3SS, providing evidence for direct interaction between the outer membrane and inner membrane ring components and an unprecedented span of the outer membrane secretin.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology and the Center for Blood Research, University of British Columbia, Vancouver, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EscC
A
156Escherichia coliMutation(s): 0 
Gene Names: escC
Find proteins for O52135 (Escherichia coli)
Go to UniProtKB:  O52135
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.213 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 90.645α = 90.00
b = 90.645β = 90.00
c = 133.422γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance