1L8K

T Cell Protein-Tyrosine Phosphatase Structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure determination of T cell protein-tyrosine phosphatase.

Iversen, L.F.Moller, K.B.Pedersen, A.K.Peters, G.H.Petersen, A.S.Andersen, H.S.Branner, S.Mortensen, S.B.Moller, N.P.

(2002) J.Biol.Chem. 277: 19982-19990

  • DOI: 10.1074/jbc.M200567200

  • PubMed Abstract: 
  • Protein-tyrosine phosphatase 1B (PTP1B) has recently received much attention as a potential drug target in type 2 diabetes. This has in particular been spurred by the finding that PTP1B knockout mice show increased insulin sensitivity and resistance ...

    Protein-tyrosine phosphatase 1B (PTP1B) has recently received much attention as a potential drug target in type 2 diabetes. This has in particular been spurred by the finding that PTP1B knockout mice show increased insulin sensitivity and resistance to diet-induced obesity. Surprisingly, the highly homologous T cell protein-tyrosine phosphatase (TC-PTP) has received much less attention, and no x-ray structure has been provided. We have previously co-crystallized PTP1B with a number of low molecular weight inhibitors that inhibit TC-PTP with similar efficiency. Unexpectedly, we were not able to co-crystallize TC-PTP with the same set of inhibitors. This seems to be due to a multimerization process where residues 130-132, the DDQ loop, from one molecule is inserted into the active site of the neighboring molecule, resulting in a continuous string of interacting TC-PTP molecules. Importantly, despite the high degree of functional and structural similarity between TC-PTP and PTP1B, we have been able to identify areas close to the active site that might be addressed to develop selective inhibitors of each enzyme.


    Organizational Affiliation

    Protein Chemistry and Signal Transduction, Novo Nordisk, DK-2880 Bagsvaerd, Denmark. lfiv@novonordisk.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T-cell protein-tyrosine phosphatase
A
314Homo sapiensMutation(s): 0 
Gene Names: PTPN2 (PTPT)
EC: 3.1.3.48
Find proteins for P17706 (Homo sapiens)
Go to Gene View: PTPN2
Go to UniProtKB:  P17706
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.215 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 60.494α = 90.00
b = 60.494β = 90.00
c = 187.633γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2002-03-21 
  • Released Date: 2002-05-08 
  • Deposition Author(s): Iversen, L.F.

Revision History 

  • Version 1.0: 2002-05-08
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance