3ZLF

Structure of group A Streptococcal enolase K312A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.176 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 2.0 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: https://doi.org/10.1371/journal.pone.0121764
  • Primary Citation of Related Structures:  
    3ZLF, 3ZLG, 3ZLH

  • 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. 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ENOLASE
A, B, C, D
455Streptococcus pyogenes MGAS10394Mutation(s): 1 
EC: 4.2.1.11
UniProt
Find proteins for Q5XD01 (Streptococcus pyogenes serotype M6 (strain ATCC BAA-946 / MGAS10394))
Explore Q5XD01 
Go to UniProtKB:  Q5XD01
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5XD01
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.176 
  • Space Group: P 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 181.62α = 90
b = 181.62β = 90
c = 56.413γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2015-04-08
    Changes: Database references
  • Version 2.0: 2023-12-20
    Changes: Atomic model, Data collection, Database references, Derived calculations, Other, Refinement description