Macromolecule Content

• Total Structure Weight: 12.03 kDa 
• Atom Count: 836 
• Modelled Residue Count: 107 
• Deposited Residue Count: 107 
• Unique protein chains: 1

1T84

Solution structure of the Wiskott-Aldrich Syndrome Protein (WASP) autoinhibited core domain complexed with (S)-wiskostatin, a small molecule inhibitor

• DOI: 10.2210/pdb1T84/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-05-11 Released: 2004-07-13 
• Deposition Author(s): Peterson, J.R., Bickford, L.C., Morgan, D., Kim, A.S., Ouerfelli, O., Kirschner, M.W., Rosen, M.K.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Chemical inhibition of N-WASP by stabilization of a native autoinhibited conformation.

Peterson, J.R., Bickford, L.C., Morgan, D., Kim, A.S., Ouerfelli, O., Kirschner, M.W., Rosen, M.K.

(2004) Nat Struct Mol Biol 11: 747-755

• PubMed: 15235593 
• DOI: 10.1038/nsmb796
• Primary Citation of Related Structures:  
  1T84


• PubMed Abstract: 
  

Current drug discovery efforts focus primarily on proteins with defined enzymatic or small molecule binding sites. Autoregulatory domains represent attractive alternative targets for small molecule inhibitors because they also occur in noncatalytic proteins and because allosteric inhibitors may avoid specificity problems inherent in active site-directed inhibitors. We report here the identification of wiskostatin, a chemical inhibitor of the neural Wiskott-Aldrich syndrome protein (N-WASP). Wiskostatin interacts with a cleft in the regulatory GTPase-binding domain (GBD) of WASP in the solution structure of the complex. Wiskostatin induces folding of the isolated, unstructured GBD into its autoinhibited conformation, suggesting that wiskostatin functions by stabilizing N-WASP in its autoinhibited state. The use of small molecules to bias conformational equilibria represents a potentially general strategy for chemical inhibition of autoinhibited proteins, even in cases where such sites have not been naturally evolved in a target.

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Organizational Affiliation: 

Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, Massachusetts 02115, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Wiskott-Aldrich syndrome protein	A	107	Homo sapiens	Mutation(s): 0  Gene Names: WASP (residues 242-310 and 461-492), WAS, IMD2
Find proteins for P42768 (Homo sapiens) Explore P42768  Go to UniProtKB:  P42768
NIH Common Fund Data Resources
PHAROS:  P42768 GTEx:  ENSG00000015285

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
WSK	A	(2S)-1-(3,6-DIBROMO-9H-CARBAZOL-9-YL)-3-(DIMETHYLAMINO)PROPAN-2-OL C17 H18 Br2 N2 O XUBJEDZHBUPBKL-ZDUSSCGKSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1T84 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-05-11 
• Released Date: 2004-07-13 
Deposition Author(s): Peterson, J.R., Bickford, L.C., Morgan, D., Kim, A.S., Ouerfelli, O., Kirschner, M.W., Rosen, M.K.

Revision History  

• Version 1.0: 2004-07-13
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance