4CWT

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.203 

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
  • Primary Citation of Related Structures:  

  • 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.,Oncology, Nerviano Medical Sciences, Viale Pasteur 10, 20014 Nerviano (MI), Italy. Electronic address: elena.casale@nervianoms.com.,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-ALPHA
A
230Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1 (HSP90A, HSPC1, HSPCA)
Find proteins for P07900 (Homo sapiens)
Go to Gene View: HSP90AA1
Go to UniProtKB:  P07900
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IK9
Query on IK9

Download SDF File 
Download CCD File 
A
2-{[(2Z)-5-(1,3-benzodioxol-5-ylmethyl)-8-fluoro-2-imino-2,3-dihydro[1,2,4]triazolo[1,5-c]quinazolin-10-yl]amino}ethanol
C19 H17 F N6 O3
VTYBTDCJZWSDTA-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IK9Ki: 179 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.203 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 67.287α = 90.00
b = 91.704β = 90.00
c = 99.275γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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