4E2L

Crystal Structure of the periplasmic domain of mutant FepE LPS O-antigen chain length regulator protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural Characterization of Closely Related O-antigen Lipopolysaccharide (LPS) Chain Length Regulators.

Kalynych, S.Yao, D.Magee, J.Cygler, M.

(2012) J.Biol.Chem. 287: 15696-15705

  • DOI: 10.1074/jbc.M112.354837
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The surface O-antigen polymers of gram-negative bacteria exhibit a modal length distribution that depends on dedicated chain length regulator periplasmic proteins (polysaccharide co-polymerases, PCPs) anchored in the inner membrane by two transmembra ...

    The surface O-antigen polymers of gram-negative bacteria exhibit a modal length distribution that depends on dedicated chain length regulator periplasmic proteins (polysaccharide co-polymerases, PCPs) anchored in the inner membrane by two transmembrane helices. In an attempt to determine whether structural changes underlie the O-antigen modal length specification, we have determined the crystal structures of several closely related PCPs, namely two chimeric PCP-1 family members solved at 1.6 and 2.8 Å and a wild-type PCP-1 from Shigella flexneri solved at 2.8 Å. The chimeric proteins form circular octamers, whereas the wild-type WzzB from S. flexneri was found to be an open trimer. We also present the structure of a Wzz(FepE) mutant, which exhibits severe attenuation in its ability to produce very long O-antigen polymers. Our findings suggest that the differences in the modal length distribution depend primarily on the surface-exposed amino acids in specific regions rather than on the differences in the oligomeric state of the PCP protomers.


    Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, Quebec H3G 0B1, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ferric enterobactin (Enterochelin) transport
A, B, C, D, E, F, G, H, I
271Escherichia coli O157:H7Mutation(s): 0 
Gene Names: fepE
Find proteins for Q8XBV8 (Escherichia coli O157:H7)
Go to UniProtKB:  Q8XBV8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.242 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 208.307α = 90.00
b = 141.257β = 107.03
c = 136.888γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASERphasing
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-03-28
    Type: Initial release
  • Version 1.1: 2012-04-04
    Type: Database references
  • Version 1.2: 2012-06-20
    Type: Database references
  • Version 1.3: 2017-08-02
    Type: Source and taxonomy