2CNG

Structural Insights into the Design of Nonpeptidic Isothiazolidinone- Containing Inhibitors of Protein Tyrosine Phosphatase 1B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.208 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural Insights Into the Design of Nonpeptidic Isothiazolidinone-Containing Inhibitors of Protein- Tyrosine Phosphatase 1B.

Ala, P.J.Gonneville, L.Hillman, M.Becker-Pasha, M.Yue, E.W.Douty, B.Wayland, B.Polam, P.Crawley, M.L.Mclaughlin, E.Sparks, R.B.Glass, B.Takvorian, A.Combs, A.P.Burn, T.C.Hollis, G.F.Wynn, R.

(2006) J Biol Chem 281: 38013

  • DOI: https://doi.org/10.1074/jbc.M607913200
  • Primary Citation of Related Structures:  
    2CNE, 2CNF, 2CNG, 2CNH, 2CNI

  • PubMed Abstract: 

    Structural analyses of the protein-tyrosine phosphatase 1B (PTP1B) active site and inhibitor complexes have aided in optimization of a peptide inhibitor containing the novel (S)-isothiazolidinone (IZD) phosphonate mimetic. Potency and permeability were simultaneously improved by replacing the polar peptidic backbone of the inhibitor with nonpeptidic moieties. The C-terminal primary amide was replaced with a benzimidazole ring, which hydrogen bonds to the carboxylate of Asp(48), and the N terminus of the peptide was replaced with an aryl sulfonamide, which hydrogen bonds to Asp(48) and the backbone NH of Arg(47) via a water molecule. Although both substituents retain the favorable hydrogen bonding network of the peptide scaffold, their aryl rings interact weakly with the protein. The aryl ring of benzimidazole is partially solvent exposed and only participates in van der Waals interactions with Phe(182) of the flap. The aryl ring of aryl sulfonamide adopts an unexpected conformation and only participates in intramolecular pi-stacking interactions with the benzimidazole ring. These results explain the flat SAR for substitutions on both rings and the reason why unsubstituted moieties were selected as candidates. Finally, substituents ortho to the IZD heterocycle on the aryl ring of the IZD-phenyl moiety bind in a small narrow site adjacent to the primary phosphate binding pocket. The crystal structure of an o-chloro derivative reveals that chlorine interacts extensively with residues in the small site. The structural insights that have led to the discovery of potent benzimidazole aryl sulfonamide o-substituted derivatives are discussed in detail.


  • Organizational Affiliation

    Incyte Corporation, Wilmington, Delaware 19880, USA. pauljala@gmail.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TYROSINE-PROTEIN PHOSPHATASE NON-RECEPTOR TYPE 1321Homo sapiensMutation(s): 0 
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
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
IZE
Query on IZE

Download Ideal Coordinates CCD File 
B [auth A]N-{(1S)-2-{4-[(5R)-1,1-DIOXIDO-3-OXOISOTHIAZOLIDIN-5-YL]PHENYL}-1-[5-(TRIFLUOROMETHYL)-1H-BENZIMIDAZOL-2-YL]ETHYL}-2,2,2-TRIFLUOROACETAMIDE
C21 H16 F6 N4 O4 S
ZQCICORKZRLKMU-HOTGVXAUSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
IZE PDBBind:  2CNG IC50: 110 (nM) from 1 assay(s)
BindingDB:  2CNG IC50: 110 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.52α = 90
b = 76.18β = 90
c = 88.56γ = 90
Software Package:
Software NamePurpose
CNXrefinement
CrystalCleardata reduction
CrystalCleardata scaling
CNXphasing

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-27
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-05
    Changes: Data collection
  • Version 1.4: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Refinement description