3HHU | pdb_00003hhu

Human heat-shock protein 90 (HSP90) in complex with {4-[3-(2,4-dihydroxy-5-isopropyl-phenyl)-5-thioxo- 1,5-dihydro-[1,2,4]triazol-4-yl]-benzyl}-carbamic acid ethyl ester {ZK 2819}


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 
    0.225 (Depositor), 0.220 (DCC) 
  • R-Value Work: 
    0.203 (Depositor), 0.200 (DCC) 
  • R-Value Observed: 
    0.204 (Depositor) 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted 819Click on this verticalbar to view details

This is version 1.3 of the entry. See complete history


Literature

Potent triazolothione inhibitor of heat-shock protein-90.

Feldman, R.I.Mintzer, B.Zhu, D.Wu, J.M.Biroc, S.L.Yuan, S.Emayan, K.Chang, Z.Chen, D.Arnaiz, D.O.Bryant, J.Ge, X.S.Whitlow, M.Adler, M.Polokoff, M.A.Li, W.W.Ferrer, M.Sato, T.Gu, J.M.Shen, J.Tseng, J.L.Dinter, H.Buckman, B.

(2009) Chem Biol Drug Des 74: 43-50

  • DOI: https://doi.org/10.1111/j.1747-0285.2009.00833.x
  • Primary Citation of Related Structures:  
    3HHU

  • PubMed Abstract: 

    Heat-shock protein-90 is an attractive target for anticancer drugs, as heat-shock protein-90 blockers such as the ansamycin 17-(allylamino)-17-demethoxygeldanamycin greatly reduce the expression of many signaling molecules that are disregulated in cancer cells and are key drivers of tumor growth and metastasis. While 17-(allylamino)-17-demethoxygeldanamycin has shown promise in clinical trials, this compound class has significant template-related drawbacks. In this paper, we describe a new, potent non-ansamycin small-molecule inhibitor of heat-shock protein-90, BX-2819, containing resorcinol and triazolothione rings. Structural studies demonstrate binding of BX-2819 to the ADP/ATP-binding pocket of heat-shock protein-90. The compound blocked expression of heat-shock protein-90 client proteins in cancer cell lines and inhibited cell growth with a potency similar to 17-(allylamino)-17-demethoxygeldanamycin. In a panel of four cancer cell lines, BX-2819 blocked growth with an average IC(50) value of 32 nM (range of 7-72 nM). Efficacy studies demonstrated that treatment with BX-2819 significantly inhibited the growth of NCI-N87 and HT-29 tumors in nude mice, consistent with pharmacodynamic studies showing inhibition of heat-shock protein-90 client protein expression in tumors for greater than 16 h after dosing. These data support further studies to assess the potential of BX-2819 and related analogs for the treatment of cancer.


  • Organizational Affiliation

    Bayer Healthcare, 2600 Hilltop Drive, Richmond, CA 94804, USA. rick.feldman@bayer.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Heat shock protein HSP 90-alpha
A, B
224Homo sapiensMutation(s): 0 
EC: 3.6.4.10
UniProt & NIH Common Fund Data Resources
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
PHAROS:  P07900
GTEx:  ENSG00000080824 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07900
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
819
Query on 819

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
ethyl (4-{3-[2,4-dihydroxy-5-(1-methylethyl)phenyl]-5-sulfanyl-4H-1,2,4-triazol-4-yl}benzyl)carbamate
C21 H24 N4 O4 S
VVLULBZUIUWMQM-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free:  0.225 (Depositor), 0.220 (DCC) 
  • R-Value Work:  0.203 (Depositor), 0.200 (DCC) 
  • R-Value Observed: 0.204 (Depositor) 
Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.019α = 90
b = 90.036β = 90
c = 100.04γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
BOSdata collection
X-GENdata reduction
X-GENdata scaling
MOLREPphasing
CCP4phasing
CNXrefinement

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted 819Click on this verticalbar to view details

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations