4O0B

Identification of novel HSP90/isoform selective inhibitors using structure-based drug design. Demonstration of potential utility in treating CNS disorders such as Huntington's disease


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Identification of Novel HSP90 alpha / beta Isoform Selective Inhibitors Using Structure-Based Drug Design. Demonstration of Potential Utility in Treating CNS Disorders such as Huntington's Disease.

Ernst, J.T.Neubert, T.Liu, M.Sperry, S.Zuccola, H.Turnbull, A.Fleck, B.Kargo, W.Woody, L.Chiang, P.Tran, D.Chen, W.Snyder, P.Alcacio, T.Nezami, A.Reynolds, J.Alvi, K.Goulet, L.Stamos, D.

(2014) J Med Chem 57: 3382-3400

  • DOI: 10.1021/jm500042s
  • Primary Citation of Related Structures:  
    4O04, 4O0B, 4O05, 4O07, 4O09

  • PubMed Abstract: 
  • A structure-based drug design strategy was used to optimize a novel benzolactam series of HSP90α/β inhibitors to achieve >1000-fold selectivity versus the HSP90 endoplasmic reticulum and mitochondrial isoforms (GRP94 and TRAP1, respectively). Selective HSP90α/β inhibitors were found to be equipotent to pan-HSP90 inhibitors in promoting the clearance of mutant huntingtin protein (mHtt) in vitro, however with less cellular toxicity ...

    A structure-based drug design strategy was used to optimize a novel benzolactam series of HSP90α/β inhibitors to achieve >1000-fold selectivity versus the HSP90 endoplasmic reticulum and mitochondrial isoforms (GRP94 and TRAP1, respectively). Selective HSP90α/β inhibitors were found to be equipotent to pan-HSP90 inhibitors in promoting the clearance of mutant huntingtin protein (mHtt) in vitro, however with less cellular toxicity. Improved tolerability profiles may enable the use of HSP90α/β selective inhibitors in treating chronic neurodegenerative indications such as Huntington's disease (HD). A potent, selective, orally available HSP90α/β inhibitor was identified (compound 31) that crosses the blood-brain barrier. Compound 31 demonstrated proof of concept by successfully reducing brain Htt levels following oral dosing in rats.


    Organizational Affiliation

    Vertex Pharmaceuticals , 11010 Torreyana Road, San Diego, California 92121, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock protein HSP 90-alphaA233Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1HSP90AHSPC1HSPCA
UniProt & NIH Common Fund Data Resources
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
PHAROS:  P07900
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2QA (Subject of Investigation/LOI)
Query on 2QA

Download Ideal Coordinates CCD File 
B [auth A]8-cyclopentyl-6-(3,6,6-trimethyl-4-oxo-4,5,6,7-tetrahydro-1H-indol-1-yl)-3,4-dihydroisoquinolin-1(2H)-one
C25 H30 N2 O2
AMWZXPSBURRZMG-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
2QA BindingDB:  4O0B Ki: min: 5, max: 5 (nM) from 2 assay(s)
IC50: min: 6, max: 24 (nM) from 2 assay(s)
Binding MOAD:  4O0B Ki: 5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.4α = 90
b = 89.23β = 90
c = 97.37γ = 90
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
PROCESSdata collection
PROCESSdata reduction
PROCESSdata scaling
BUSTERrefinement

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-09
    Type: Initial release
  • Version 1.1: 2014-05-07
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Refinement description