3ZLG

Structure of group A Streptococcal enolase K362A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Stability of the Octameric Structure Affects Plasminogen-Binding Capacity of Streptococcal Enolase.

Cork, A.J.Ericsson, D.J.Law, R.H.P.Casey, L.W.Valkov, E.Bertozzi, C.Stamp, A.Jovcevski, B.Aquilina, J.A.Whisstock, J.C.Walker, M.J.Kobe, B.

(2015) Plos One 10: 21764

  • DOI: 10.1371/journal.pone.0121764
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Group A Streptococcus (GAS) is a human pathogen that has the potential to cause invasive disease by binding and activating human plasmin(ogen). Streptococcal surface enolase (SEN) is an octameric α-enolase that is localized at the GAS cell surface. I ...

    Group A Streptococcus (GAS) is a human pathogen that has the potential to cause invasive disease by binding and activating human plasmin(ogen). Streptococcal surface enolase (SEN) is an octameric α-enolase that is localized at the GAS cell surface. In addition to its glycolytic role inside the cell, SEN functions as a receptor for plasmin(ogen) on the bacterial surface, but the understanding of the molecular basis of plasmin(ogen) binding is limited. In this study, we determined the crystal and solution structures of GAS SEN and characterized the increased plasminogen binding by two SEN mutants. The plasminogen binding ability of SENK312A and SENK362A is ~2- and ~3.4-fold greater than for the wild-type protein. A combination of thermal stability assays, native mass spectrometry and X-ray crystallography approaches shows that increased plasminogen binding ability correlates with decreased stability of the octamer. We propose that decreased stability of the octameric structure facilitates the access of plasmin(ogen) to its binding sites, leading to more efficient plasmin(ogen) binding and activation.


    Organizational Affiliation

    School of Chemistry and Molecular Biosciences and Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, 4072, Australia; Australian Infectious Disease Research Centre, University of Queensland, Brisbane, QLD, 4072, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENOLASE
A, B, C, D
455Streptococcus pyogenes serotype M6 (strain ATCC BAA-946 / MGAS10394)Mutation(s): 1 
Gene Names: eno
EC: 4.2.1.11
Find proteins for Q5XD01 (Streptococcus pyogenes serotype M6 (strain ATCC BAA-946 / MGAS10394))
Go to UniProtKB:  Q5XD01
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B, C, D
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.179 
  • Space Group: P 4
Unit Cell:
Length (Å)Angle (°)
a = 187.255α = 90.00
b = 187.255β = 90.00
c = 57.156γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2015-04-08
    Type: Database references