5OCI

Human Heat Shock Protein 90 bound to 6-Hydroxy-3-(3-methyl-benzyl)-1H-indazole-5-carboxylic acid methyl-(4-morpholin-4-yl-phenyl)-amide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.62 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Ligand Desolvation Steers On-Rate and Impacts Drug Residence Time of Heat Shock Protein 90 (Hsp90) Inhibitors.

Schuetz, D.A.Richter, L.Amaral, M.Grandits, M.Gradler, U.Musil, D.Buchstaller, H.P.Eggenweiler, H.M.Frech, M.Ecker, G.F.

(2018) J Med Chem 61: 4397-4411

  • DOI: 10.1021/acs.jmedchem.8b00080
  • Primary Citation of Related Structures:  
    5LO1, 5LO0, 5LNZ, 5LNY, 5OD7, 5OCI, 5ODX, 5NYH

  • PubMed Abstract: 
  • Residence time and more recently the association rate constant k on are increasingly acknowledged as important parameters for in vivo efficacy and safety of drugs. However, their broader consideration in drug development is limited by a lack of knowledge of how to optimize these parameters ...

    Residence time and more recently the association rate constant k on are increasingly acknowledged as important parameters for in vivo efficacy and safety of drugs. However, their broader consideration in drug development is limited by a lack of knowledge of how to optimize these parameters. In this study on a set of 176 heat shock protein 90 inhibitors, structure-kinetic relationships, X-ray crystallography, and molecular dynamics simulations were combined to retrieve a concrete scheme of how to rationally slow down on-rates. We discovered that an increased ligand desolvation barrier by introducing polar substituents resulted in a significant k on decrease. The slowdown was accomplished by introducing polar moieties to those parts of the ligand that point toward a hydrophobic cavity. We validated this scheme by increasing polarity of three Hsp90 inhibitors and observed a 9-, 13-, and 45-fold slowdown of on-rates and a 9-fold prolongation in residence time. This prolongation was driven by transition state destabilization rather than ground state stabilization.


    Organizational Affiliation

    Department of Pharmaceutical Chemistry , University of Vienna , UZA 2, Althanstrasse 14 , 1090 Vienna , Austria.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock protein HSP 90-alphaA229Homo 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
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
9R8 (Subject of Investigation/LOI)
Query on 9R8

Download Ideal Coordinates CCD File 
B [auth A]6-Hydroxy-3-(3-methyl-benzyl)-1H-indazole-5-carboxylic acid methyl-(4-morpholin-4-yl-phenyl)-amide
C27 H28 N4 O3
YSQVIQVAUOYCCV-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
9R8 Binding MOAD:  5OCI Kd: 9 (nM) from 1 assay(s)
BindingDB:  5OCI Kd: 9 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.62 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.476α = 90
b = 90.607β = 90
c = 99.211γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2018-06-06
    Changes: Data collection, Database references
  • Version 1.2: 2019-10-16
    Changes: Data collection