4CWO

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.199 

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Ligand Structure Quality Assessment 


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
  • Primary Citation of Related Structures:  
    4CWF, 4CWP, 4CWQ, 4CWR, 4CWS, 4CWT, 4CWN, 4CWO

  • 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 class of Hsp90 inhibitors by means of a biophysical FAXS-NMR based screening of a library of fragments ...

    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: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEAT SHOCK PROTEIN HSP 90-ALPHAA230Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1, HSP90A, HSPC1, HSPCA
UniProt & NIH Common Fund Data Resources
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
PHAROS:  P07900
GTEx:  ENSG00000080824
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
T62 (Subject of Investigation/LOI)
Query on T62
Download Ideal Coordinates CCD File 
 B [auth A]5-(2-amino-[1,2,4]triazolo[1,5-c]quinazolin-5-ylmethyl)-benzene-1,3-diol
C16 H13 N5 O2
DXCBGOVJQFRCDX-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
T62 BindingDB:  4CWO Ki: 6100 (nM) from 1 assay(s)
Binding MOAD:  4CWO Ki: 6100 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.199 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.985α = 90
b = 92.014β = 90
c = 100.291γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment  


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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