Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 27.06 kDa 
• Atom Count: 1797 
• Residue Count: 209 
• Unique protein chains: 1

2VCJ

4,5 Diaryl Isoxazole Hsp90 Chaperone Inhibitors: Potential Therapeutic Agents for the Treatment of Cancer

• DOI: 10.2210/pdb2VCJ/pdb

• Classification: CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-09-24 Released: 2007-12-11 
• Deposition Author(s): Brough, P.A., Aherne, W., Barril, X., Borgognoni, J., Boxal, K., Cansfield, J.E., Cheung, K.M., Collins, I., Davies, N.G.M., Drysdale, M.J., Dymock, B., Eccles, S.A., Finch, H., Fink, A., Hayes, A., Howes, R., Hubbard, R.E., James, K., Jordan, A.M., Lockie, A., Martins, V., Massey, A., Matthews, T.P., McDonald, E., Northfield, C.J., Pearl, L.H., Prodromou, C., Ray, S., Raynaud, F.I., Roughley, S.D., Sharp, S.Y., Surgenor, A., Walmsley, D.L., Webb, P., Wood, M., Workman, P., Wright, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.305 
• R-Value Work: 0.221 
• R-Value Observed: 0.225 

Literature

4,5-diarylisoxazole Hsp90 chaperone inhibitors: potential therapeutic agents for the treatment of cancer.

Brough, P.A., Aherne, W., Barril, X., Borgognoni, J., Boxall, K., Cansfield, J.E., Cheung, K.M., Collins, I., Davies, N.G., Drysdale, M.J., Dymock, B., Eccles, S.A., Finch, H., Fink, A., Hayes, A., Howes, R., Hubbard, R.E., James, K., Jordan, A.M., Lockie, A., Martins, V., Massey, A., Matthews, T.P., McDonald, E., Northfield, C.J., Pearl, L.H., Prodromou, C., Ray, S., Raynaud, F.I., Roughley, S.D., Sharp, S.Y., Surgenor, A., Walmsley, D.L., Webb, P., Wood, M., Workman, P., Wright, L.

(2008) J Med Chem 51: 196-218

• PubMed: 18020435 
• DOI: 10.1021/jm701018h
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Inhibitors of the Hsp90 molecular chaperone are showing considerable promise as potential chemotherapeutic agents for cancer. Here, we describe the structure-based design, synthesis, structure-activity relationships and pharmacokinetics of potent small-molecule inhibitors of Hsp90 based on the 4,5-diarylisoxazole scaffold. Analogues from this series have high affinity for Hsp90, as measured in a fluorescence polarization (FP) competitive binding assay, and are active in cancer cell lines where they inhibit proliferation and exhibit a characteristic profile of depletion of oncogenic proteins and concomitant elevation of Hsp72. Compound 40f (VER-52296/NVP-AUY922) is potent in the Hsp90 FP binding assay (IC50 = 21 nM) and inhibits proliferation of various human cancer cell lines in vitro, with GI50 averaging 9 nM. Compound 40f is retained in tumors in vivo when administered i.p., as evaluated by cassette dosing in tumor-bearing mice. In a human colon cancer xenograft model, 40f inhibits tumor growth by approximately 50%.

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Organizational Affiliation: 

Vernalis Ltd., Granta Park, Great Abington, Cambridge CB21 6GB, U.K. p.brough@ vernalis.com

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEAT SHOCK PROTEIN HSP 90-ALPHA	A	236	Homo sapiens	Mutation(s): 0  Gene Names: HSP90AA1, HSP90A, HSPC1, HSPCA
Find proteins for P07900 (Homo sapiens) Explore P07900  Go to UniProtKB:  P07900
NIH Common Fund Data Resources
PHAROS  P07900 GTEx  ENSG00000080824

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
2EQ	A	5-(5-chloro-2,4-dihydroxyphenyl)-N-ethyl-4-[4-(morpholin-4-ylmethyl)phenyl]isoxazole-3-carboxamide C23 H24 Cl N3 O5 APGOABVITLQCKW-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
2EQ	IC50:  10000   nM  BindingDB
2EQ	IC50 :  21   nM  PDBBind
2EQ	EC50:  83   nM  BindingDB
2EQ	IC50:  21   nM  BindingDB
2EQ	IC50:  21   nM  Binding MOAD

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.305 
• R-Value Work: 0.221 
• R-Value Observed: 0.225 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.038	α = 90
b = 89.289	β = 90
c = 99.516	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
d*TREK	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-09-24 
• Released Date: 2007-12-11 
Deposition Author(s): Brough, P.A., Aherne, W., Barril, X., Borgognoni, J., Boxal, K., Cansfield, J.E., Cheung, K.M., Collins, I., Davies, N.G.M., Drysdale, M.J., Dymock, B., Eccles, S.A., Finch, H., Fink, A., Hayes, A., Howes, R., Hubbard, R.E., James, K., Jordan, A.M., Lockie, A., Martins, V., Massey, A., Matthews, T.P., McDonald, E., Northfield, C.J., Pearl, L.H., Prodromou, C., Ray, S., Raynaud, F.I., Roughley, S.D., Sharp, S.Y., Surgenor, A., Walmsley, D.L., Webb, P., Wood, M., Workman, P., Wright, L.

Revision History 

• Version 1.0: 2007-12-11
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-02-28
  Changes: Database references