3UJZ

Crystal structure of enterohemorrhagic E. coli StcE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural Insight into the Bacterial Mucinase StcE Essential to Adhesion and Immune Evasion during Enterohemorrhagic E. coli Infection.

Yu, A.C.Worrall, L.J.Strynadka, N.C.

(2012) Structure 20: 707-717

  • DOI: 10.1016/j.str.2012.02.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mucin glycoproteins with large numbers of O-linked glycosylations comprise the mucosal barrier lining the mammalian gastrointestinal tract from mouth to gut. A critical biological function of mucins is to protect the underlying epithelium from infect ...

    Mucin glycoproteins with large numbers of O-linked glycosylations comprise the mucosal barrier lining the mammalian gastrointestinal tract from mouth to gut. A critical biological function of mucins is to protect the underlying epithelium from infection. Enterohemorrhagic Escherichia coli (EHEC), the mediator of severe food- and water-borne disease, can breach this barrier and adhere to intestinal cells. StcE, a ∼100 kDa metalloprotease secreted by EHEC, plays a pivotal role in remodeling the mucosal lining during infection. To obtain mechanistic insight into its function, we have determined the structure of StcE. Our data reveal a dynamic, multidomain architecture featuring an unusually large substrate-binding cleft and a prominent polarized surface charge distribution highly suggestive of an electrostatic role in substrate targeting. The observation of key conserved motifs in the active site allows us to propose the structural basis for the specific recognition of α-O-glycan-containing substrates. Complementary biochemical analysis provides further insight into its distinct substrate specificity and binding stoichiometry.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology and the Center for Blood Research, Life Sciences Center, 2350 Health Sciences Mall, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Metalloprotease stcE
A
869Escherichia coli O157:H7Mutation(s): 4 
Gene Names: stcE (tagA)
EC: 3.4.24.-
Find proteins for O82882 (Escherichia coli O157:H7)
Go to UniProtKB:  O82882
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.211 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 76.530α = 90.00
b = 186.000β = 90.00
c = 188.760γ = 90.00
Software Package:
Software NamePurpose
MAR345dtbdata collection
SHARPphasing
MOSFLMdata reduction
SCALAdata scaling
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-16
    Type: Initial release