4CWN

Human HSP90 alpha N-terminal domain in complex with an Aminotriazoloquinazoline inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Fragment-Based Hit Discovery and Structure-Based Optimization of Aminotriazoloquinazolines as Novel Hsp90 Inhibitors.

Casale, E.Amboldi, N.Brasca, M.G.Caronni, D.Colombo, N.Dalvit, C.Felder, E.R.Fogliatto, G.Galvani, A.Isacchi, A.Polucci, P.Riceputi, L.Sola, F.Visco, C.Zuccotto, F.Casuscelli, F.

(2014) Bioorg Med Chem 22: 4135

  • DOI: 10.1016/j.bmc.2014.05.056
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • In the last decade the heat shock protein 90 (Hsp90) has emerged as a major therapeutic target and many efforts have been dedicated to the discovery of Hsp90 inhibitors as new potent anticancer agents. Here we report the identification of a novel cla ...

    In the last decade the heat shock protein 90 (Hsp90) has emerged as a major therapeutic target and many efforts have been dedicated to the discovery of Hsp90 inhibitors as new potent anticancer agents. Here we report the identification of a novel class of Hsp90 inhibitors by means of a biophysical FAXS-NMR based screening of a library of fragments. The use of X-ray structure information combined with modeling studies enabled the fragment evolution of the initial triazoloquinazoline hit to a class of compounds with nanomolar potency and drug-like properties suited for further lead optimization.


    Organizational Affiliation

    Oncology, Nerviano Medical Sciences, Viale Pasteur 10, 20014 Nerviano (MI), Italy. Electronic address: francesco.casuscelli@nervianoms.com.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEAT SHOCK PROTEIN HSP 90-ALPHAA230Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1HSP90AHSPC1HSPCA
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
NIH Common Fund Data Resources
PHAROS  P07900
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
6LV
Query on 6LV

Download CCD File 
A
5-(3,5-dimethoxybenzyl)[1,2,4]triazolo[1,5-c]quinazolin-2-amine
C18 H17 N5 O2
OOUWYRBLMZEUGI-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
6LVKi:  2600   nM  BindingDB
6LVKi:  2600   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.179α = 90
b = 90.712β = 90
c = 99.232γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-09
    Type: Initial release
  • Version 1.1: 2014-08-06
    Changes: Database references
  • Version 1.2: 2017-06-28
    Changes: Data collection