1FNV

STRUCTURE OF STREPTOCOCCAL PYROGENIC EXOTOXIN A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.233 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of streptococcal pyrogenic exotoxin A reveals a novel metal cluster.

Earhart, C.A.Vath, G.M.Roggiani, M.Schlievert, P.M.Ohlendorf, D.H.

(2000) Protein Sci 9: 1847-1851

  • DOI: 10.1110/ps.9.9.1847
  • Primary Citation of Related Structures:  
    1FNW, 1FNV, 1FNU

  • PubMed Abstract: 
  • The streptococcal pyrogenic toxins A, B, and C (SPEA, SPEB, and SPEC) are responsible for the fever, rash, and other toxicities associated with scarlet fever and streptococcal toxic shock syndrome. This role, together with the ubiquity of diseases ca ...

    The streptococcal pyrogenic toxins A, B, and C (SPEA, SPEB, and SPEC) are responsible for the fever, rash, and other toxicities associated with scarlet fever and streptococcal toxic shock syndrome. This role, together with the ubiquity of diseases caused by Streptococcus pyogenes, have prompted structural analyses of SPEA by several groups. Papageorgiou et al. (1999) have recently reported the structure of SPEA crystallized in the absence of zinc. Zinc has been shown to be important in the ability of some staphylococcal and streptococcal toxins to stimulate proliferation of CD4+ T-cells. Since cadmium is more electron dense than zinc and typically binds interchangeably, we grew crystals in the presence of 10 mM CdCl2. Crystals have been obtained in three space groups, and the structure in the P2(1)2(1)2(1) crystal form has been refined to 1.9 A resolution. The structural analysis revealed an identical tetramer as well as a novel tetrahedral cluster of cadmium in all three crystal forms on a disulfide loop encompassing residues 87-98. No cadmium was bound at the site homologous to the zinc site in staphylococcal enterotoxins C (SECs) despite the high structural homology between SPEA and SECs. Subsequent soaking of crystals grown in the presence of cadmium in 10 mM ZnCl2 showed that zinc binds in this site (indicating it can discriminate between zinc and cadmium ions) using the three ligands (Asp77, His106, and His110) homologous to the SECs plus a fourth ligand (Glu33).


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EXOTOXIN TYPE A PRECURSOR (ALLELE 1)ABCD221Streptococcus phage T12Mutation(s): 0 
Find proteins for P0DJY7 (Streptococcus pyogenes)
Explore P0DJY7 
Go to UniProtKB:  P0DJY7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD

Download CCD File 
A, B, C, D
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.233 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.48α = 90
b = 130.71β = 90
c = 84.52γ = 90
Software Package:
Software NamePurpose
X-GENdata scaling
X-GENdata reduction
X-PLORmodel building
CNSrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-11-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description