Biological Assembly 1  

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 28368.86 
• Atom Count: 1795 
• Residue Count: 249 
• Unique protein chains: 1

2XJX

Structure of HSP90 with small molecule inhibitor bound

• DOI: 10.2210/pdb2XJX/pdb

• Classification: CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2010-07-06 Released: 2010-08-11 
• Deposition Author(s): Murray, C.W., Carr, M.G., Callaghan, O., Chessari, G., Congreve, M., Cowan, S., Coyle, J.E., Downham, R., Figueroa, E., Frederickson, M., Graham, B., McMenamin, R., OBrien, M.A., Patel, S., Phillips, T.R., Williams, G., Woodhead, A.J., Woolford, A.J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.66 Å
• R-Value Free: 0.208 
• R-Value Work: 0.155 

Literature

Discovery of (2,4-Dihydroxy-5-Isopropylphenyl)-[5-(4-Methylpiperazin-1-Ylmethyl)-1,3-Dihydroisoindol-2-Yl]Methanone (at13387), a Novel Inhibitor of the Molecular Chaperone Hsp90 by Fragment Based Drug Design.

Woodhead, A.J., Angove, H., Carr, M.G., Chessari, G., Congreve, M., Coyle, J.E., Cosme, J., Graham, B., Day, P.J., Downham, R., Fazal, L., Feltell, R., Figueroa, E., Frederickson, M., Lewis, J., Mcmenamin, R., Murray, C.W., O'Brien, M.A., Parra, L., Patel, S., Phillips, T., Rees, D.C., Rich, S., Smith, D.M., Trewartha, G., Vinkovic, M., Williams, B., Woolford, A.J.

(2010) J.Med.Chem. 53: 5956

• PubMed: 20662534 
• DOI: 10.1021/jm100060b
• Primary Citation of Related Structures:  
  2XAB, 2XJJ, 2XJG


• PubMed Abstract: 
  

Inhibitors of the molecular chaperone heat shock protein 90 (Hsp90) are currently generating significant interest in clinical development as potential treatments for cancer. In a preceding publication (DOI: 10.1021/jm100059d ) we describe Astex's approach to screening fragments against Hsp90 and the subsequent optimization of two hits into leads with inhibitory activities in the low nanomolar range. This paper describes the structure guided optimization of the 2,4-dihydroxybenzamide lead molecule 1 and details some of the drug discovery strategies employed in the identification of AT13387 (35), which has progressed through preclinical development and is currently being tested in man.

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Organizational Affiliation: 

Medicinal Chemistry, Astex Therapeutics, Ltd., Cambridge, UK. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEAT SHOCK PROTEIN HSP 90-ALPHA	A	249	Homo sapiens	Mutation(s): 0  Gene Names: HSP90AA1 (HSP90A, HSPC1, HSPCA)
Find proteins for P07900 (Homo sapiens) Go to Gene View: HSP90AA1 Go to UniProtKB:  P07900

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
XJX	A	Onalespib AT13387 C24 H31 N3 O3 IFRGXKKQHBVPCQ-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
XJX	IC50: 30 - 350 nM (92) BINDINGDB
XJX	Kd: 0.71 nM BINDINGMOAD
XJX	Kd: 0.71 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.66 Å
• R-Value Free: 0.208 
• R-Value Work: 0.155 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 44.950	α = 90.00
b = 41.050	β = 101.86
c = 49.230	γ = 90.00

Software Package:

Software Name	Purpose
BUSTER-TNT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-07-06 
• Released Date: 2010-08-11 
• Deposition Author(s): Murray, C.W., Carr, M.G., Callaghan, O., Chessari, G., Congreve, M., Cowan, S., Coyle, J.E., Downham, R., Figueroa, E., Frederickson, M., Graham, B., McMenamin, R., OBrien, M.A., Patel, S., Phillips, T.R., Williams, G., Woodhead, A.J., Woolford, A.J.A.

Revision History 

• Version 1.0: 2010-08-11
  Type: Initial release
• Version 1.1: 2013-04-24
  Type: Other, Structure summary, Version format compliance
• Version 1.2: 2015-02-18
  Type: Non-polymer description, Structure summary