1T49

Allosteric Inhibition of Protein Tyrosine Phosphatase 1B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.2 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:  
    1T4J, 1T48, 1T49

  • 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 p ...

    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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein-tyrosine phosphatase, non-receptor type 1A298Homo sapiensMutation(s): 0 
Gene Names: PTPN1PTP1B
EC: 3.1.3.48
Find proteins for P18031 (Homo sapiens)
Explore P18031 
Go to UniProtKB:  P18031
NIH Common Fund Data Resources
PHAROS  P18031
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
892
Query on 892

Download CCD File 
A
3-(3,5-DIBROMO-4-HYDROXY-BENZOYL)-2-ETHYL-BENZOFURAN-6-SULFONIC ACID (4-SULFAMOYL-PHENYL)-AMIDE
C23 H18 Br2 N2 O7 S2
VSYGXLAJQDAWCZ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
892IC50:  22000   nM  Binding MOAD
892IC50 :  22000   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.394α = 90
b = 88.394β = 90
c = 104.615γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
d*TREKdata reduction
d*TREKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • 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