1STE

STAPHYLOCOCCAL ENTEROTOXIN C2 FROM STAPHYLOCOCCUS AUREUS

• PDB DOI: https://doi.org/10.2210/pdb1STE/pdb

• Classification: ENTEROTOXIN
• Organism(s): Staphylococcus aureus
• Mutation(s): No 


• Deposited: 1995-08-21 Released: 1996-12-23 
• Deposition Author(s): Acharya, K.R., Papageorgiou, A.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.255 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 

Literature

Crystal structure of the superantigen enterotoxin C2 from Staphylococcus aureus reveals a zinc-binding site.

Papageorgiou, A.C., Acharya, K.R., Shapiro, R., Passalacqua, E.F., Brehm, R.D., Tranter, H.S.

(1995) Structure 3: 769-779

• PubMed: 7582894 
• DOI: https://doi.org/10.1016/s0969-2126(01)00212-x
• Primary Citation of Related Structures:  
  1STE


• PubMed Abstract: 
  

  Staphylococcus aureus enterotoxin C2 (SEC2) belongs to a family of proteins, termed 'superantigens', that form complexes with class II MHC molecules enabling them to activate a substantial number of T cells. Although superantigens seem to act by a common mechanism, they vary in many of their specific interactions and biological properties. Comparison of the structure of SEC2 with those of two other superantigens--staphylococcal enterotoxin B (SEB) and toxic shock syndrome toxin-1 (TSST-1)--may provide insight into their mode of action.

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Organizational Affiliation: 

School of Biology and Biochemistry, University of Bath, Claverton Down, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 27.69 kDa 
• Atom Count: 1,973 
• Modelled Residue Count: 238 
• Deposited Residue Count: 239 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
STAPHYLOCOCCAL ENTEROTOXIN C2	A	239	Staphylococcus aureus	Mutation(s): 0
UniProt
Find proteins for P34071 (Staphylococcus aureus) Explore P34071  Go to UniProtKB:  P34071

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.255 
• R-Value Work: 0.205 
• R-Value Observed: 0.205 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.05	α = 90
b = 43.05	β = 90
c = 290	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-12-23 
Deposition Author(s): Acharya, K.R., Papageorgiou, A.C.

Revision History  

• Version 1.0: 1996-12-23
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance