1TS5 | pdb_00001ts5

I140T MUTANT OF TOXIC SHOCK SYNDROME TOXIN-1 FROM S. AUREUS

• PDB DOI: https://doi.org/10.2210/pdb1TS5/pdb

• Classification: TOXIN
• Organism(s): Staphylococcus aureus
• Expression System: Staphylococcus aureus
• Mutation(s): Yes 


• Deposited: 1997-10-10 Released: 1998-12-16 
• Deposition Author(s): Earhart, C.A., Mitchell, D.T., Murray, D.L., Pinheiro, D.M., Matsumura, M., Schlievert, P.M., Ohlendorf, D.H.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.10 Å
• R-Value Work: 
  0.179 (Depositor) 
• R-Value Observed: 
  0.179 (Depositor) 

Starting Model: experimental

Literature

Structures of five mutants of toxic shock syndrome toxin-1 with reduced biological activity.

Earhart, C.A., Mitchell, D.T., Murray, D.L., Pinheiro, D.M., Matsumura, M., Schlievert, P.M., Ohlendorf, D.H.

(1998) Biochemistry 37: 7194-7202

• PubMed: 9585531 
• DOI: https://doi.org/10.1021/bi9721896
• Primary Citation Related Structures: 
  1AW7, 1TS2, 1TS3, 1TS4, 1TS5


• PubMed Abstract: 
  

  The three-dimensional structures of five mutants of toxic shock syndrome toxin-1 (TSST-1) have been determined. These mutations are in the long central alpha helix and are useful in mapping portions of TSST-1 involved in superantigenicity and lethality. The T128A, H135A, Q139K, and I140T mutations appear to reduce superantigenicity by altering the properties of the T-cell receptor interaction surface. The Q136A mutation is at a largely buried site and causes a dramatic change in the conformation of the beta7-beta9 loop which covers the back of the central alpha helix. As this mutation has the unique ability to reduce the toxin's lethality in rabbits while retaining its superantigenicity, it raises the possibility that this rear loop mediates the ability of TSST-1 to induce lethality and suggests a route for producing nonlethal toxins for therapeutic development.

---

Organizational Affiliation: 
• Department of Biochemistry, Medical School, University of Minnesota, Minneapolis 55455, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 44.18 kDa 
• Atom Count: 3,136 
• Modeled Residue Count: 388 
• Deposited Residue Count: 388 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TOXIC SHOCK SYNDROME TOXIN-1	A, B	194	Staphylococcus aureus	Mutation(s): 1
UniProt
Find proteins for P06886 (Staphylococcus aureus) Explore P06886  Go to UniProtKB:  P06886

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.10 Å
• R-Value Work:  0.179 (Depositor) 
• R-Value Observed: 0.179 (Depositor) 

Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 104.17	α = 90
b = 104.17	β = 90
c = 98.21	γ = 120

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-12-16 
Deposition Author(s): Earhart, C.A., Mitchell, D.T., Murray, D.L., Pinheiro, D.M., Matsumura, M., Schlievert, P.M., Ohlendorf, D.H.

Revision History  

• Version 1.0: 1998-12-16
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-11-03
  Changes: Database references, Other
• Version 1.4: 2023-08-09
  Changes: Refinement description
• Version 1.5: 2024-05-22
  Changes: Data collection