1DYQ

STAPHYLOCOCCAL ENTEROTOXIN A MUTANT VACCINE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Structural Basis for Abrogated Binding between Staphylococcal Enterotoxin a Superantigen Vaccine and Mhc-II?

Krupka, H.I.Segelke, B.W.Ulrich, R.Ringhofer, S.Knapp, M.Rupp, B.

(2002) Protein Sci 11: 642

  • DOI: 10.1110/ps.39702
  • Primary Citation of Related Structures:  
    1DYQ

  • PubMed Abstract: 
  • Staphylococcal enterotoxins (SEs) are superantigenic protein toxins responsible for a number of life-threatening diseases. The X-ray structure of a staphylococcal enterotoxin A (SEA) triple-mutant (L48R, D70R, and Y92A) vaccine reveals a cascade of s ...

    Staphylococcal enterotoxins (SEs) are superantigenic protein toxins responsible for a number of life-threatening diseases. The X-ray structure of a staphylococcal enterotoxin A (SEA) triple-mutant (L48R, D70R, and Y92A) vaccine reveals a cascade of structural rearrangements located in three loop regions essential for binding the alpha subunit of major histocompatibility complex class II (MHC-II) molecules. A comparison of hypothetical model complexes between SEA and the SEA triple mutant with MHC-II HLA-DR1 clearly shows disruption of key ionic and hydrophobic interactions necessary for forming the complex. Extensive dislocation of the disulfide loop in particular interferes with MHC-IIalpha binding. The triple-mutant structure provides new insights into the loss of superantigenicity and toxicity of an engineered superantigen and provides a basis for further design of enterotoxin vaccines.


    Organizational Affiliation

    Lawrence Livermore National Laboratory, Macromolecular Crystallography, Biology and Biotechnology Research Program, University of California, Livermore, California 94551, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Enterotoxin type AA234Staphylococcus aureusMutation(s): 3 
Gene Names: entA
Find proteins for P0A0L2 (Staphylococcus aureus)
Explore P0A0L2 
Go to UniProtKB:  P0A0L2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.048α = 90
b = 78.652β = 90
c = 86.374γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
EPMRphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-03-19
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-04-03
    Changes: Data collection, Experimental preparation, Other
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2019-09-25
    Changes: Advisory, Data collection, Database references, Source and taxonomy, Structure summary