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 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1002/cmdc.201500014
  • Primary Citation of Related Structures:  
    4U5L, 4U5N, 4U5O, 4U5S, 4U54, 4U58, 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 potentia ...

    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). ca26@cam.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Importin subunit alpha-1A426Mus musculusMutation(s): 0 
Gene Names: Kpna2Rch1
Find proteins for P52293 (Mus musculus)
Explore P52293 
Go to UniProtKB:  P52293
NIH Common Fund Data Resources
IMPC  MGI:103561
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3D2
Query on 3D2

Download CCD File 
A
N~2~-[3-(pyridin-3-yl)benzyl]-L-lysinamide
C18 H24 N4 O
HSVQHUWOLRPWEF-KRWDZBQOSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
3D2Kd:  1300000   nM  Binding MOAD
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

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-05-13
    Type: Initial release
  • Version 1.1: 2015-07-08
    Changes: Database references