6N8W

Structure of Unliganded Hsp90-Beta N-Terminal Domain

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.09 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.231 

wwPDB Validation   3D Report Full Report


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: https://doi.org/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-betaA, B, C, D251Homo sapiensMutation(s): 0 
Gene Names: HSP90AB1, HSP90B, HSPC2, HSPCB
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
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download Ideal Coordinates CCD File 
AA [auth C],
BA [auth C],
CA [auth C],
DA [auth C],
E [auth A],
AA [auth C],
BA [auth C],
CA [auth C],
DA [auth C],
E [auth A],
EA [auth C],
F [auth A],
FA [auth C],
G [auth A],
GA [auth C],
H [auth A],
HA [auth C],
I [auth A],
IA [auth D],
J [auth A],
JA [auth D],
K [auth A],
KA [auth D],
L [auth A],
M [auth B],
N [auth B],
O [auth B],
P [auth B],
Q [auth B],
R [auth B],
S [auth B],
T [auth B],
U [auth B],
V [auth B],
W [auth C],
X [auth C],
Y [auth C],
Z [auth C]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.09 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.231 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 175.25α = 90
b = 70.249β = 123.451
c = 101.606γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



View more in-depth experimental data
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