1T48

Allosteric Inhibition of Protein Tyrosine Phosphatase 1B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.211 

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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein-tyrosine phosphatase, non-receptor type 1
A
298Homo sapiensMutation(s): 0 
Gene Names: PTPN1 (PTP1B)
EC: 3.1.3.48
Find proteins for P18031 (Homo sapiens)
Go to Gene View: PTPN1
Go to UniProtKB:  P18031
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BB3
Query on BB3

Download SDF File 
Download CCD File 
A
3-(3,5-DIBROMO-4-HYDROXY-BENZOYL)-2-ETHYL-BENZOFURAN-6-SULFONIC ACID DIMETHYLAMIDE
C19 H17 Br2 N O5 S
FEYGJZKVMASWJB-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BB3IC50: 350000 nM BINDINGMOAD
BB3IC50: 350000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.211 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 88.941α = 90.00
b = 88.941β = 90.00
c = 104.837γ = 120.00
Software Package:
Software NamePurpose
d*TREKdata reduction
d*TREKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-20
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance