1EXF

EXFOLIATIVE TOXIN A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structure of the superantigen exfoliative toxin A suggests a novel regulation as a serine protease.

Vath, G.M.Earhart, C.A.Rago, J.V.Kim, M.H.Bohach, G.A.Schlievert, P.M.Ohlendorf, D.H.

(1997) Biochemistry 36: 1559-1566

  • DOI: 10.1021/bi962614f

  • PubMed Abstract: 
  • Exfoliative toxin A (ETA) causes staphylococcal scalded skin syndrome which is characterized by a specific intraepidermal separation of layers of the skin. The mechanism by which ETA causes skin separation is unknown although protease or superantigen ...

    Exfoliative toxin A (ETA) causes staphylococcal scalded skin syndrome which is characterized by a specific intraepidermal separation of layers of the skin. The mechanism by which ETA causes skin separation is unknown although protease or superantigen activity has been implicated. The X-ray crystal structure of ETA has been solved in two crystal forms to 2.1 and 2.3 A resolution and R-factors of 17% and 19%, respectively. The structures indicate that ETA belongs to the chymotrypsin-like family of serine proteases and cleaves substrates after acidic residues. The conformation of a loop adjacent to the catalytic site is suggested to be key in regulating the proteolytic activity of ETA through controlling whether the main chain carbonyl group of Pro192 occupies the oxyanion hole. A unique amino-terminal domain containing a 15-residue amphipathic alpha helix may also be involved in protease activation through binding a specific receptor. Substitution of the active site serine residue with cysteine abolishes the ability of ETA to produce the characteristic separation of epidermal layers but not its ability to induce T cell proliferation.


    Organizational Affiliation

    Department of Biochemistry, University of Minnesota Medical School, Minneapolis 55455, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EXFOLIATVE TOXIN A
A
242Staphylococcus aureusMutation(s): 0 
Gene Names: eta
EC: 3.4.21.-
Find proteins for P09331 (Staphylococcus aureus)
Go to UniProtKB:  P09331
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLY
Query on GLY

Download SDF File 
Download CCD File 
A
GLYCINE
C2 H5 N O2
DHMQDGOQFOQNFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.172 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 71.500α = 90.00
b = 71.500β = 90.00
c = 122.860γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing
XENGENdata collection
XENGENdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-02-25
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance