2BCM

DaaE adhesin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.48 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystal Structure and Mutational Analysis of the DaaE Adhesin of Escherichia coli.

Korotkova, N.Le Trong, I.Samudrala, R.Korotkov, K.Van Loy, C.P.Bui, A.L.Moseley, S.L.Stenkamp, R.E.

(2006) J.Biol.Chem. 281: 22367-22377

  • DOI: 10.1074/jbc.M604646200

  • PubMed Abstract: 
  • DaaE is a member of the Dr adhesin family of Escherichia coli, members of which are associated with diarrhea and urinary tract infections. A receptor for Dr adhesins is the cell surface protein, decay-accelerating factor (DAF). We have carried out a ...

    DaaE is a member of the Dr adhesin family of Escherichia coli, members of which are associated with diarrhea and urinary tract infections. A receptor for Dr adhesins is the cell surface protein, decay-accelerating factor (DAF). We have carried out a functional analysis of Dr adhesins, as well as mutagenesis and crystallographic studies of DaaE, to obtain detailed molecular information about interactions of Dr adhesins with their receptors. The crystal structure of DaaE has been solved at 1.48 A resolution. Trimers of the protein are found in the crystal, as has been the case for other Dr adhesins. Naturally occurring variants and directed mutations in DaaE have been generated and analyzed for their ability to bind DAF. Mapping of the mutation sites onto the DaaE molecular structure shows that several of them contribute to a contiguous surface that is likely the primary DAF-binding site. The DAF-binding properties of purified fimbriae and adhesin proteins from mutants and variants correlated with the ability of bacteria expressing these proteins to bind to human epithelial cells in culture. DaaE, DraE, AfaE-III, and AfaE-V interact with complement control protein (CCP) domains 2-4 of DAF, and analysis of the ionic strength dependence of their binding indicates that the intermolecular interactions are highly electrostatic in nature. The adhesins AfaE-I and NfaE-2 bind to CCP-3 and CCP-4 of DAF, and electrostatic interactions contribute significantly less to these interactions. These observations are consistent with structural predictions for these Dr variants and also suggest a role for the positively charged region linking CCP-2 and CCP-3 of DAF in electrostatic Dr adhesin-DAF interactions.


    Organizational Affiliation

    Department of Microbiology, University of Washington, Seattle 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
F1845 fimbrial protein
B, A, C
165Escherichia coliMutation(s): 0 
Gene Names: daaE
Find proteins for P13719 (Escherichia coli)
Go to UniProtKB:  P13719
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.48 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.169 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 68.273α = 90.00
b = 68.273β = 90.00
c = 97.756γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
MOSFLMdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-01
    Type: Initial release
  • Version 1.1: 2008-04-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-08-09
    Type: Advisory, Refinement description, Source and taxonomy
  • Version 1.4: 2017-10-18
    Type: Refinement description