5FK9

Crystal structure of staphylococcal enterotoxin A F47A mutant in complex with a T cell receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.259 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Two Common Structural Motifs for Tcr Recognition by Staphylococcal Enterotoxins

Rodstrom, K.E.J.Regenthal, P.Bahl, C.Ford, A.Baker, D.Lindkvist-Petersson, K.

(2016) Sci Rep 6: 25796

  • DOI: 10.1038/srep25796
  • Primary Citation of Related Structures:  
    5FK9, 5FKA

  • PubMed Abstract: 
  • Superantigens are toxins produced by Staphylococcus aureus, called staphylococcal enterotoxins (abbreviated SEA to SEU). They can cross-link the T cell receptor (TCR) and major histocompatibility complex class II, triggering a massive T cell activation and hence disease ...

    Superantigens are toxins produced by Staphylococcus aureus, called staphylococcal enterotoxins (abbreviated SEA to SEU). They can cross-link the T cell receptor (TCR) and major histocompatibility complex class II, triggering a massive T cell activation and hence disease. Due to high stability and toxicity, superantigens are potential agents of bioterrorism. Hence, antagonists may not only be useful in the treatment of disease but also serve as countermeasures to biological warfare. Of particular interest are inhibitors against SEA and SEB. SEA is the main cause of food poisoning, while SEB is a common toxin manufactured as a biological weapon. Here, we present the crystal structures of SEA in complex with TCR and SEE in complex with the same TCR, complemented with computational alanine-scanning mutagenesis of SEA, SEB, SEC3, SEE, and SEH. We have identified two common areas that contribute to the general TCR binding for these superantigens. This paves the way for design of single antagonists directed towards multiple toxins.


    Organizational Affiliation

    Department of Experimental Medical Science, Lund University, BMC C13, 22 184, Lund, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
T CELL RECEPTOR ALPHA CHAINA206Homo sapiensMutation(s): 0 
Gene Names: TRAV22TRACTCRA
UniProt & NIH Common Fund Data Resources
Find proteins for P01848 (Homo sapiens)
Explore P01848 
Go to UniProtKB:  P01848
PHAROS:  P01848
Find proteins for A0A0B4J277 (Homo sapiens)
Explore A0A0B4J277 
Go to UniProtKB:  A0A0B4J277
PHAROS:  A0A0B4J277
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsA0A0B4J277P01848
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
T CELL RECEPTOR BETA CHAINB243Homo sapiensMutation(s): 0 
Gene Names: TCRBV6S4A1TRBC2TCRBC2
UniProt & NIH Common Fund Data Resources
Find proteins for A0A5B9 (Homo sapiens)
Explore A0A5B9 
Go to UniProtKB:  A0A5B9
PHAROS:  A0A5B9
Find proteins for A0A5A3 (Homo sapiens)
Explore A0A5A3 
Go to UniProtKB:  A0A5A3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsA0A5B9A0A5A3
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
ENTEROTOXIN TYPE AC233Staphylococcus aureusMutation(s): 1 
Gene Names: entA
UniProt
Find proteins for P0A0L2 (Staphylococcus aureus)
Explore P0A0L2 
Go to UniProtKB:  P0A0L2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A0L2
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.259 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 114.34α = 90
b = 150.44β = 90
c = 39.69γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
AutoPROCdata reduction
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-05-25
    Type: Initial release
  • Version 1.1: 2016-06-01
    Changes: Database references