1W6T

Crystal Structure Of Octameric Enolase From Streptococcus pneumoniae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.150 

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
  • Primary Citation of Related Structures:  
    1W6T

  • 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 lysine residues ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENOLASEA, B444Streptococcus pneumoniae TIGR4Mutation(s): 0 
Gene Names: enoSP_1128
EC: 4.2.1.11
UniProt
Find proteins for Q97QS2 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Explore Q97QS2 
Go to UniProtKB:  Q97QS2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2PE
Query on 2PE

Download Ideal Coordinates CCD File 
D [auth A], F [auth B]NONAETHYLENE GLYCOL
C18 H38 O10
YZUUTMGDONTGTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A], E [auth B]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.150 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 143.702α = 90
b = 143.702β = 90
c = 100.579γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
EPMRphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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