1T4J

Allosteric Inhibition of Protein Tyrosine Phosphatase 1B

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history. 


Literature

Allosteric inhibition of protein tyrosine phosphatase 1B

Wiesmann, C., Barr, K.J., Kung, J., Zhu, J., Erlanson, D.A., Shen, W., Fahr, B.J., Zhong, M., Taylor, L., Randal, M., McDowell, R.S., Hansen, S.K.

(2004) Nat Struct Mol Biol 11: 730-737

  • DOI: 10.1038/nsmb803
  • Primary Citation of Related Structures:  
    1T48, 1T49, 1T4J

  • PubMed Abstract: 

    • Obesity and type II diabetes are closely linked metabolic syndromes that afflict >100 million people worldwide. Although protein tyrosine phosphatase 1B (PTP1B) has emerged as a promising target for the treatment of both syndromes, the discovery of pharmaceutically acceptable inhibitors that bind at the active site remains a substantial challenge ...

    Obesity and type II diabetes are closely linked metabolic syndromes that afflict >100 million people worldwide. Although protein tyrosine phosphatase 1B (PTP1B) has emerged as a promising target for the treatment of both syndromes, the discovery of pharmaceutically acceptable inhibitors that bind at the active site remains a substantial challenge. Here we describe the discovery of an allosteric site in PTP1B. Crystal structures of PTP1B in complex with allosteric inhibitors reveal a novel site located approximately 20 A from the catalytic site. We show that allosteric inhibitors prevent formation of the active form of the enzyme by blocking mobility of the catalytic loop, thereby exploiting a general mechanism used by tyrosine phosphatases. Notably, these inhibitors exhibit selectivity for PTP1B and enhance insulin signaling in cells. Allosteric inhibition is a promising strategy for targeting PTP1B and constitutes a mechanism that may be applicable to other tyrosine phosphatases.

    Organizational Affiliation: 

    Sunesis Pharmaceuticals, 341 Oyster Point Boulevard, South San Francisco, California 94080, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein-tyrosine phosphatase, non-receptor type 1A298Homo sapiensMutation(s): 0 
Gene Names: PTPN1, PTP1B
EC: 3.1.3.48
UniProt & NIH Common Fund Data Resources
Find proteins for P18031 (Homo sapiens)
Explore P18031 
Go to UniProtKB:  P18031
PHAROS:  P18031
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP18031
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FRJ
Query on FRJ
Download Ideal Coordinates CCD File 
B [auth A]3-(3,5-DIBROMO-4-HYDROXY-BENZOYL)-2-ETHYL-BENZOFURAN-6-SULFONIC ACID [4-(THIAZOL-2-YLSULFAMOYL)-PHENYL]-AMIDE
C26 H19 Br2 N3 O7 S3
SXKBTDJJEQQEGE-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
FRJ BindingDB:  1T4J IC50: min: 2000, max: 8000 (nM) from 3 assay(s)
PDBBind:  1T4J IC50: 8000 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.544α = 90
b = 88.544β = 90
c = 104.828γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
d*TREKdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-07-20
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description