1Q6T

THE STRUCTURE OF PHOSPHOTYROSINE PHOSPHATASE 1B IN COMPLEX WITH COMPOUND 11


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.214 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

The Structural Basis for the Selectivity of Benzotriazole Inhibitors of Ptp1B

Scapin, G.Patel, S.B.Becker, J.W.Wang, Q.Desponts, C.Waddleton, D.Skorey, K.Cromlish, W.Bayly, C.Therien, M.Gauthier, J.Y.Li, C.S.Lau, C.K.Ramachandran, C.Kennedy, B.P.Asante-Appiah, E.

(2003) Biochemistry 42: 11451-11459

  • DOI: https://doi.org/10.1021/bi035098j
  • Primary Citation of Related Structures:  
    1Q6J, 1Q6M, 1Q6N, 1Q6P, 1Q6S, 1Q6T

  • PubMed Abstract: 

    Protein tyrosine phosphatase 1B (PTP1B) has been implicated in the regulation of the insulin signaling pathway and represents an attractive target for the design of inhibitors in the treatment of type 2 diabetes and obesity. Inspection of the structure of PTP1B indicates that potent PTP1B inhibitors may be obtained by targeting a secondary aryl phosphate-binding site as well as the catalytic site. We report here the crystal structures of PTP1B in complex with first and second generation aryldifluoromethyl-phosphonic acid inhibitors. While all compounds bind in a previously unexploited binding pocket near the primary binding site, the second generation compounds also reach into the secondary binding site, and exhibit moderate selectivity for PTP1B over the closely related T-cell phosphatase. The molecular basis for the selectivity has been confirmed by single point mutation at position 52, where the two phosphatases differ by a phenylalanine-to-tyrosine switch. These compounds present a novel platform for the development of potent and selective PTP1B inhibitors.


  • Organizational Affiliation

    Merck Research Laboratory, P. O. Box 2000, Rahway, New Jersey 07065, USA. giovanna_scapin@merck.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein-tyrosine phosphatase, non-receptor type 1
A, B
310Homo sapiensMutation(s): 0 
Gene Names: PTPN1 OR 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
GTEx:  ENSG00000196396 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP18031
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
600 BindingDB:  1Q6T IC50: min: 5, max: 5340 (nM) from 7 assay(s)
PDBBind:  1Q6T IC50: 5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.029α = 90
b = 87.828β = 90
c = 138.926γ = 90
Software Package:
Software NamePurpose
X-GENdata scaling
X-GENdata reduction
CNXrefinement
CNXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description