1QXK

Monoacid-Based, Cell Permeable, Selective Inhibitors of Protein Tyrosine Phosphatase 1B

• PDB DOI: https://doi.org/10.2210/pdb1QXK/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-09-08 Released: 2003-10-28 
• Deposition Author(s): Xin, Z., Liu, G., Abad-Zapatero, C., Pei, Z., Szczepankiewick, B.G., Li, X., Zhang, T., Hutchins, C.W., Hajduk, P.J., Ballaron, S.J., Stashko, M.A., Lubben, T.H., Trevillyan, J.M., Jirousek, M.R.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.245 
• R-Value Work: 0.196 
• R-Value Observed: 0.201 

Starting Model: experimental

Literature

Identification of a Monoacid-Based, Cell Permeable, Selective Inhibitor of Protein Tyrosine Phosphatase 1B

Xin, Z., Liu, G., Abad-Zapatero, C., Pei, Z., Szczepankiewick, B.G., Li, X., Zhang, T., Hutchins, C.W., Hajduk, P.J., Ballaron, S.J., Stashko, M.A., Lubben, T.H., Trevillyan, J.M., Jirousek, M.R.

(2003) Bioorg Med Chem Lett 13: 3947-3950

• PubMed: 14592481 
• DOI: https://doi.org/10.1016/j.bmcl.2003.08.064
• Primary Citation of Related Structures:  
  1QXK


• PubMed Abstract: 
  

  Monoacid-based PTP1B inhibitors with improved physiochemical properties have been investigated. A (2-hydroxy-phenoxy) acetic acid-based phosphotyrosyl mimetic has been linked with an optimized second arylphosphate binding site ligand to produce compound 20 with low micromolar potency against PTP1B, good selectivity over TCPTP (20-fold) and high cell permeability in the Caco-2 system.

---

Organizational Affiliation: 

Metabolic Disease Research, Global Pharmaceutical Research and Development, Abbott Laboratories, Abbott Park, IL 60064-6098, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 37.88 kDa 
• Atom Count: 2,520 
• Modelled Residue Count: 283 
• Deposited Residue Count: 321 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein-tyrosine phosphatase, non-receptor type 1	A	321	Homo sapiens	Mutation(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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
429	B [auth A]	2-{4-[2-ACETYLAMINO-3-(4-CARBOXYMETHOXY-3-HYDROXY-PHENYL)-PROPIONYLAMINO]-BUTOXY}-6-HYDROXY-BENZOIC ACID METHYL ESTER C25 H30 N2 O10 QEANZBIJPCAREV-KRWDZBQOSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
429	BindingDB:  1QXK	Ki: min: 7943, max: 9000 (nM) from 2 assay(s)
		IC50: 9000 (nM) from 1 assay(s)
	PDBBind:  1QXK	Ki: 9000 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.245 
• R-Value Work: 0.196 
• R-Value Observed: 0.201 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 88.356	α = 90
b = 88.356	β = 90
c = 104.347	γ = 120

Software Package:

Software Name	Purpose
CNX	refinement
MAR345	data collection
HKL-2000	data scaling
CNX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-10-28 
Deposition Author(s): Xin, Z., Liu, G., Abad-Zapatero, C., Pei, Z., Szczepankiewick, B.G., Li, X., Zhang, T., Hutchins, C.W., Hajduk, P.J., Ballaron, S.J., Stashko, M.A., Lubben, T.H., Trevillyan, J.M., Jirousek, M.R.

Revision History  

• Version 1.0: 2003-10-28
  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: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description