2QST

Crystal structure of the V39C mutant of the N-terminal domain of carcinoembryonic antigen (CEA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Binding of Dr adhesins of Escherichia coli to carcinoembryonic antigen triggers receptor dissociation.

Korotkova, N.Yang, Y.Le Trong, I.Cota, E.Demeler, B.Marchant, J.Thomas, W.E.Stenkamp, R.E.Moseley, S.L.Matthews, S.

(2008) Mol.Microbiol. 67: 420-434

  • DOI: 10.1111/j.1365-2958.2007.06054.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Carcinoembryonic antigen (CEA)-related cell adhesion molecules (CEACAMs) are host receptors for the Dr family of adhesins of Escherichia coli. To define the mechanism for binding of Dr adhesins to CEACAM receptors, we carried out structural studies o ...

    Carcinoembryonic antigen (CEA)-related cell adhesion molecules (CEACAMs) are host receptors for the Dr family of adhesins of Escherichia coli. To define the mechanism for binding of Dr adhesins to CEACAM receptors, we carried out structural studies on the N-terminal domain of CEA and its complex with the Dr adhesin. The crystal structure of CEA reveals a dimer similar to other dimers formed by receptors with IgV-like domains. The structure of the CEA/Dr adhesin complex is proposed based on NMR spectroscopy and mutagenesis data in combination with biochemical characterization. The Dr adhesin/CEA interface overlaps appreciably with the region responsible for CEA dimerization. Binding kinetics, mutational analysis and spectroscopic examination of CEA dimers suggest that Dr adhesins can dissociate CEA dimers prior to the binding of monomeric forms. Our conclusions include a plausible mechanism for how E. coli, and perhaps other bacterial and viral pathogens, exploit CEACAMs. The present structure of the complex provides a powerful tool for the design of novel inhibitory strategies to treat E. coli infections.


    Organizational Affiliation

    Department of Microbiology, University of Washington, Seattle, WA 98195-7242, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carcinoembryonic antigen-related cell adhesion molecule 5
A, B
111Homo sapiensMutation(s): 1 
Gene Names: CEACAM5 (CEA)
Find proteins for P06731 (Homo sapiens)
Go to Gene View: CEACAM5
Go to UniProtKB:  P06731
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 127.228α = 90.00
b = 127.228β = 90.00
c = 166.940γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
CrystalCleardata collection
MOLREPphasing
HKL-2000data scaling
HKL-2000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance