6N8Y

Hsp90-beta bound to PU-11-trans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.165 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structures of Hsp90 alpha and Hsp90 beta bound to a purine-scaffold inhibitor reveal an exploitable residue for drug selectivity.

Huck, J.D.Que, N.L.S.Sharma, S.Taldone, T.Chiosis, G.Gewirth, D.T.

(2019) Proteins 87: 869-877

  • DOI: 10.1002/prot.25750
  • Primary Citation of Related Structures:  
    6N8W, 6N8X, 6N8Y, 6OLX

  • PubMed Abstract: 
  • Hsp90α and Hsp90β are implicated in a number of cancers and neurodegenerative disorders but the lack of selective pharmacological probes confounds efforts to identify their individual roles. Here, we analyzed the binding of an Hsp90α-selective PU compound, PU-11-trans, to the two cytosolic paralogs ...

    Hsp90α and Hsp90β are implicated in a number of cancers and neurodegenerative disorders but the lack of selective pharmacological probes confounds efforts to identify their individual roles. Here, we analyzed the binding of an Hsp90α-selective PU compound, PU-11-trans, to the two cytosolic paralogs. We determined the co-crystal structures of Hsp90α and Hsp90β bound to PU-11-trans, as well as the structure of the apo Hsp90β NTD. The two inhibitor-bound structures reveal that Ser52, a nonconserved residue in the ATP binding pocket in Hsp90α, provides additional stability to PU-11-trans through a water-mediated hydrogen-bonding network. Mutation of Ser52 to alanine, as found in Hsp90β, alters the dissociation constant of Hsp90α for PU-11-trans to match that of Hsp90β. Our results provide a structural explanation for the binding preference of PU inhibitors for Hsp90α and demonstrate that the single nonconserved residue in the ATP-binding pocket may be exploited for α/β selectivity.


    Organizational Affiliation

    Department of Structural Biology, Jacobs School of Medicine & Biomedical Sciences, University at Buffalo, Buffalo, New York.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heat shock protein HSP 90-betaA241Homo sapiensMutation(s): 0 
Gene Names: HSP90AB1HSP90BHSPC2HSPCB
UniProt & NIH Common Fund Data Resources
Find proteins for P08238 (Homo sapiens)
Explore P08238 
Go to UniProtKB:  P08238
PHAROS:  P08238
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08238
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KFY (Subject of Investigation/LOI)
Query on KFY

Download Ideal Coordinates CCD File 
B [auth A]9-[(2E)-but-2-en-1-yl]-8-[(3,4,5-trimethoxyphenyl)methyl]-9H-purin-6-amine
C19 H23 N5 O3
ZAFMHPQRCYVTLV-AATRIKPKSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
KFY Binding MOAD:  6N8Y Kd: 4200 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.165 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.144α = 90
b = 90.959β = 90
c = 96.196γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesP01CA186866
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesR01CA095130

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-03
    Type: Initial release
  • Version 1.1: 2019-07-10
    Changes: Data collection, Database references
  • Version 1.2: 2019-09-11
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-04
    Changes: Author supporting evidence