1W6T

Crystal Structure Of Octameric Enolase From Streptococcus pneumoniae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.148 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Plasmin(Ogen)-Binding Alpha-Enolase from Streptococcus Pneumoniae: Crystal Structure and Evaluation of Plasmin(Ogen)-Binding Sites

Ehinger, S.Schubert, W.-D.Bergmann, S.Hammerschmidt, S.Heinz, D.W.

(2004) J.Mol.Biol. 343: 997

  • DOI: 10.1016/j.jmb.2004.08.088

  • PubMed Abstract: 
  • Alpha-enolases are ubiquitous cytoplasmic, glycolytic enzymes. In pathogenic bacteria, alpha-enolase doubles as a surface-displayed plasmin(ogen)-binder supporting virulence. The plasmin(ogen)-binding site was initially traced to the two C-terminal l ...

    Alpha-enolases are ubiquitous cytoplasmic, glycolytic enzymes. In pathogenic bacteria, alpha-enolase doubles as a surface-displayed plasmin(ogen)-binder supporting virulence. The plasmin(ogen)-binding site was initially traced to the two C-terminal lysine residues. More recently, an internal nine-amino acid motif comprising residues 248 to 256 was identified with this function. We report the crystal structure of alpha-enolase from Streptococcus pneumoniae at 2.0A resolution, the first structure both of a plasminogen-binding and of an octameric alpha-enolase. While the dimer is structurally similar to other alpha-enolases, the octamer places the C-terminal lysine residues in an inaccessible, inter-dimer groove restricting the C-terminal lysine residues to a role in folding and oligomerization. The nine residue plasminogen-binding motif, by contrast, is exposed on the octamer surface revealing this as the primary site of interaction between alpha-enolase and plasminogen.


    Organizational Affiliation

    Division of Structural Biology, GBF-German Research Center for Biotechnology, Mascheroder Weg 1, 38124 Braunschweig, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENOLASE
A, B
444Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)Gene Names: eno
EC: 4.2.1.11
Find proteins for Q97QS2 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Go to UniProtKB:  Q97QS2
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2PE
Query on 2PE

Download SDF File 
Download CCD File 
A, B
NONAETHYLENE GLYCOL
C18 H38 O10
YZUUTMGDONTGTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.148 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 143.702α = 90.00
b = 143.702β = 90.00
c = 100.579γ = 90.00
Software Package:
Software NamePurpose
EPMRphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-08-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance