3EAX

Crystal structure PTP1B complex with small molecule compound LZP-6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Targeting inactive enzyme conformation: aryl diketoacid derivatives as a new class of PTP1B inhibitors.

Liu, S.Zeng, L.F.Wu, L.Yu, X.Xue, T.Gunawan, A.M.Long, Y.Q.Zhang, Z.Y.

(2008) J.Am.Chem.Soc. 130: 17075-17084

  • DOI: 10.1021/ja8068177
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • There has been considerable interest in protein tyrosine phosphatase 1B (PTP1B) as a therapeutic target for diabetes, obesity, as well as cancer. Identifying inhibitory compounds with good bioavailability is a major challenge of drug discovery progra ...

    There has been considerable interest in protein tyrosine phosphatase 1B (PTP1B) as a therapeutic target for diabetes, obesity, as well as cancer. Identifying inhibitory compounds with good bioavailability is a major challenge of drug discovery programs targeted toward PTPs. Most current PTP active site-directed pharmacophores are negatively charged pTyr mimetics which cannot readily enter the cell. This lack of cell permeability limits the utility of such compounds in signaling studies and further therapeutic development. We identify aryl diketoacids as novel pTyr surrogates and show that neutral amide-linked aryl diketoacid dimers also exhibit excellent PTP inhibitory activity. Kinetic studies establish that these aryl diketoacid derivatives act as noncompetitive inhibitors of PTP1B. Crystal structures of ligand-bound PTP1B reveal that both the aryl diketoacid and its dimeric derivative bind PTP1B at the active site, albeit with distinct modes of interaction, in the catalytically inactive, WPD loop open conformation. Furthermore, dimeric aryl diketoacids are cell permeable and enhance insulin signaling in hepatoma cells, suggesting that targeting the inactive conformation may provide a unique opportunity for creating active site-directed PTP1B inhibitors with improved pharmacological properties.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, Indiana 46202, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein phosphatase non-receptor type 1
A
321Homo 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
LZP
Query on LZP

Download SDF File 
Download CCD File 
A
4,4'-piperazine-1,4-diylbis{1-[3-(benzyloxy)phenyl]-4-oxobutane-1,3-dione}
C38 H34 N2 O8
WITKJXOKUUWDOW-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LZPKi: 12000 nM BINDINGMOAD
LZPKi: 12000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.213 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 88.612α = 90.00
b = 88.612β = 90.00
c = 104.278γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance