2QST

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • R-Value Observed: 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:  
    2VER, 2QSQ, 2QST

  • 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 on the N-terminal domain of CEA and its complex with the Dr adhesin ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carcinoembryonic antigen-related cell adhesion molecule 5 AB111Homo sapiensMutation(s): 1 
Gene Names: CEACAM5CEA
Find proteins for P06731 (Homo sapiens)
Explore P06731 
Go to UniProtKB:  P06731
NIH Common Fund Data Resources
PHAROS:  P06731
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.228α = 90
b = 127.228β = 90
c = 166.94γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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