3B8M

Structure of FepE- Bacterial Polysaccharide Co-polymerase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Bacterial polysaccharide co-polymerases share a common framework for control of polymer length

Tocilj, A.Munger, C.Proteau, A.Morona, R.Purins, L.Ajamian, E.Wagner, J.Papadopoulos, M.Van Den Bosch, L.Rubinstein, J.L.Fethiere, J.Matte, A.Cygler, M.

(2008) Nat.Struct.Mol.Biol. 15: 130-138

  • DOI: 10.1038/nsmb.1374
  • Primary Citation of Related Structures:  3B8N, 3B8O, 3B8P

  • PubMed Abstract: 
  • The chain length distribution of complex polysaccharides present on the bacterial surface is determined by polysaccharide co-polymerases (PCPs) anchored in the inner membrane. We report crystal structures of the periplasmic domains of three PCPs that ...

    The chain length distribution of complex polysaccharides present on the bacterial surface is determined by polysaccharide co-polymerases (PCPs) anchored in the inner membrane. We report crystal structures of the periplasmic domains of three PCPs that impart substantially different chain length distributions to surface polysaccharides. Despite very low sequence similarities, they have a common protomer structure with a long central alpha-helix extending 100 A into the periplasm. The protomers self-assemble into bell-shaped oligomers of variable sizes, with a large internal cavity. Electron microscopy shows that one of the full-length PCPs has a similar organization as that observed in the crystal for its periplasmic domain alone. Functional studies suggest that the top of the PCP oligomers is an important region for determining polysaccharide modal length. These structures provide a detailed view of components of the bacterial polysaccharide assembly machinery.


    Organizational Affiliation

    Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Montréal, Québec H3G 1Y6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ferric enterobactin (Enterochelin) transport
A, B, C
280Escherichia coli O157:H7Gene Names: fepE
Find proteins for Q8XBV8 (Escherichia coli O157:H7)
Go to UniProtKB:  Q8XBV8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.226 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 139.726α = 90.00
b = 139.726β = 90.00
c = 276.654γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
MOLREPphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description