2QK7

A covalent S-F heterodimer of staphylococcal gamma-hemolysin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A covalent S-F heterodimer of leucotoxin reveals molecular plasticity of beta-barrel pore-forming toxins.

Roblin, P.Guillet, V.Joubert, O.Keller, D.Erard, M.Maveyraud, L.Prevost, G.Mourey, L.

(2008) Proteins 71: 485-496

  • DOI: 10.1002/prot.21900

  • PubMed Abstract: 
  • Staphylococcal leucotoxins, leucocidins, and gamma-hemolysins are bicomponent beta-barrel pore-forming toxins (beta-PFTs). Their production is associated with several clinical diseases. They have cytotoxic activity due to the synergistic action of a ...

    Staphylococcal leucotoxins, leucocidins, and gamma-hemolysins are bicomponent beta-barrel pore-forming toxins (beta-PFTs). Their production is associated with several clinical diseases. They have cytotoxic activity due to the synergistic action of a class S component and a class F component, which are secreted as water-soluble monomers and form hetero-oligomeric transmembrane pores, causing the lysis of susceptible cells. Structural information is currently available for the monomeric S and F proteins and the homoheptamer formed by the related alpha-hemolysin. These structures illustrate the start and end points in the mechanistic framework of beta-PFT assembly. Only limited structural data exist for the intermediate stages, including hetero-oligomeric complexes of leucotoxins. We investigated the protein-protein interactions responsible for maintaining the final bipartite molecular architecture and describe here the high-resolution crystal structure and low-resolution solution structure of a site-specific cross-linked heterodimer of gamma-hemolysin (HlgA T28C-HlgB N156C), which were solved by X-ray crystallography and small angle X-ray scattering, respectively. These structures reveal a molecular plasticity of beta-PFTs, which may facilitate the transition from membrane-bound monomers to heterodimers.


    Related Citations: 
    • Engineered covalent leucotoxin heterodimers form functional pores: insights into S-F interactions
      Joubert, O.,Viero, G.,Keller, D.,Martinez, E.,Colin, D.A.,Monteil, H.,Mourey, L.,Dalla Serra, M.,Prevost, G.
      (2006) BIOCHEM.J. 396: 381


    Organizational Affiliation

    Institut de Pharmacologie et de Biologie Structurale du CNRS et de l'Université Paul Sabatier (IPBS UMR 5089), F-31077 Toulouse, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gamma-hemolysin component A
A
288Staphylococcus aureusMutation(s): 1 
Gene Names: hlgA (hlg2)
Find proteins for P0A074 (Staphylococcus aureus)
Go to UniProtKB:  P0A074
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Gamma-hemolysin component B
B
307Staphylococcus aureusMutation(s): 1 
Gene Names: hlgB-like ORF (hlgB, luk F-R)
Find proteins for Q57227 (Staphylococcus aureus)
Go to UniProtKB:  Q57227
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.180 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 140.000α = 90.00
b = 140.000β = 90.00
c = 73.078γ = 120.00
Software Package:
Software NamePurpose
ADSCdata collection
SCALAdata scaling
PHASERphasing
MOSFLMdata reduction
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-02-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Source and taxonomy, Version format compliance