4U5U

IMPORTIN-ALPHA MINOR NLS SITE INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Selective Targeting of the TPX2 Site of Importin-alpha Using Fragment-Based Ligand Design.

Holvey, R.S.Valkov, E.Neal, D.Stewart, M.Abell, C.

(2015) ChemMedChem 10: 1232-1239

  • DOI: https://doi.org/10.1002/cmdc.201500014
  • Primary Citation of Related Structures:  
    4U54, 4U58, 4U5L, 4U5N, 4U5O, 4U5S, 4U5U, 4U5V

  • PubMed Abstract: 

    Protein-protein interactions are difficult therapeutic targets, and inhibiting pathologically relevant interactions without disrupting other essential ones presents an additional challenge. Herein we report how this might be achieved for the potential anticancer target, the TPX2-importin-α interaction. Importin-α is a nuclear transport protein that regulates the spindle assembly protein TPX2. It has two binding sites--major and minor-to which partners bind. Most nuclear transport cargoes use the major site, whereas TPX2 binds principally to the minor site. Fragment-based approaches were used to identify small molecules that bind importin-α, and crystallographic studies identified a lead series that was observed to bind specifically to the minor site, representing the first ligands specific for this site. Structure-guided synthesis informed the elaboration of these fragments to explore the source of ligand selectivity between the minor and major sites. These ligands are starting points for the development of inhibitors of this protein-protein interaction.


  • Organizational Affiliation

    Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK).


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Importin subunit alpha-1426Mus musculusMutation(s): 0 
Gene Names: Kpna2Rch1
UniProt & NIH Common Fund Data Resources
Find proteins for P52293 (Mus musculus)
Explore P52293 
Go to UniProtKB:  P52293
IMPC:  MGI:103561
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52293
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
3D2
Query on 3D2

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
N~2~-[3-(pyridin-3-yl)benzyl]-L-lysinamide
C18 H24 N4 O
HSVQHUWOLRPWEF-KRWDZBQOSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.667α = 90
b = 90.469β = 90
c = 100.082γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-05-13
    Type: Initial release
  • Version 1.1: 2015-07-08
    Changes: Database references
  • Version 1.2: 2024-05-08
    Changes: Data collection, Database references