1NWL

Crystal structure of the PTP1B complexed with SP7343-SP7964, a pTyr mimetic


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Discovery of a New Phosphotyrosine Mimetic for PTP1B Using Breakaway Tethering

Erlanson, D.A.McDowell, R.S.He, M.M.Randal, M.Simmons, R.L.Kung, J.Waight, A.Hansen, S.

(2003) J Am Chem Soc 125: 5602-5603

  • DOI: 10.1021/ja034440c
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Protein tyrosine phosphatases play important roles in many signaling cascades involved in human disease. The identification of druglike inhibitors for these targets is a major challenge, and the discovery of suitable phosphotyrosine (pY) mimetics rem ...

    Protein tyrosine phosphatases play important roles in many signaling cascades involved in human disease. The identification of druglike inhibitors for these targets is a major challenge, and the discovery of suitable phosphotyrosine (pY) mimetics remains one of the key difficulties. Here we describe an extension of tethering technology, "breakaway tethering", which is ideally suited for discovering such new chemical entities. The approach involves first irreversibly modifying a protein with an extender that contains both a masked thiol and a known pY mimetic. The extender is then cleaved to release the pY mimetic, unmasking the thiol. The resulting protein is screened against a library of disulfide-containing small molecule fragments; any molecules with inherent affinity for the pY binding site will preferentially form disulfides with the extender, allowing for their identification by mass spectrometry. The ability to start from a known substrate mimimizes perturbation of protein structure and increases the opportunity to probe the active site using tethering. We applied this approach to the anti-diabetic protein PTP1B to discover a pY mimetic which belongs to a new molecular class and which binds in a novel fashion.


    Organizational Affiliation

    Sunesis Pharmaceuticals, Inc., 341 Oyster Point Boulevard, South San Francisco, California 94080, USA. erlanson@sunesis.com



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
protein-tyrosine phosphatase, non-receptor type 1
A
298Homo sapiensMutation(s): 3 
Gene Names: PTPN1PTP1B
EC: 3.1.3.48
Find proteins for P18031 (Homo sapiens)
Go to UniProtKB:  P18031
NIH Common Fund Data Resources
PHAROS  P18031
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
964
Query on 964

Download CCD File 
A
3-(4-{2-[2-(2-BROMO-ACETYLAMINO)-ETHYLDISULFANYL]-ETHYLCARBAMOYL}-CYCLOHEXYLCARBAMOYL)-PYRAZINE-2-CARBOXYLIC ACID
C19 H27 N5 O5 S2
OMSKFAYIWROESZ-OKILXGFUSA-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 %)
964Ki :  4100000   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.721α = 90
b = 88.721β = 90
c = 104.998γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
REFMACrefinement
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance