5FK9

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.257 

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:  

  • 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 activati ...

    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 Biochemistry, University of Washington, and Howard Hughes Medical Institute, Seattle, Washington 98195, USA.,Department of Experimental Medical Science, Lund University, BMC C13, 22 184, Lund, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T CELL RECEPTOR ALPHA CHAIN
A
206Homo sapiensMutation(s): 0 
Gene Names: TRAV22, TRAC (TCRA)
Find proteins for A0A0B4J277 (Homo sapiens)
Go to UniProtKB:  A0A0B4J277
Find proteins for P01848 (Homo sapiens)
Go to UniProtKB:  P01848
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
T CELL RECEPTOR BETA CHAIN
B
243Homo sapiensMutation(s): 0 
Gene Names: TCRBV6S4A1, TRBC2 (TCRBC2)
Find proteins for A0A5A3 (Homo sapiens)
Go to UniProtKB:  A0A5A3
Find proteins for A0A5B9 (Homo sapiens)
Go to UniProtKB:  A0A5B9
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ENTEROTOXIN TYPE A
C
233Staphylococcus aureusMutation(s): 1 
Gene Names: entA
Find proteins for P0A0L2 (Staphylococcus aureus)
Go to UniProtKB:  P0A0L2
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 114.340α = 90.00
b = 150.440β = 90.00
c = 39.690γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
BUSTERrefinement
Aimlessdata scaling
AutoPROCdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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