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 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 52.61 kDa 
• Atom Count: 3579 
• Modelled Residue Count: 409 
• Deposited Residue Count: 460 
• Unique protein chains: 1

4AWO

Complex of HSP90 ATPase domain with tropane derived inhibitors

• DOI: 10.2210/pdb4AWO/pdb

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


• Deposited: 2012-06-05 Released: 2012-08-29 
• Deposition Author(s): Lougheed, J.C., Stout, T.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.251 
• R-Value Work: 0.213 
• R-Value Observed: 0.215 

Literature

Discovery of Xl888: A Novel Tropane-Derived Small Molecule Inhibitor of Hsp90.

Bussenius, J., Blazey, C.M., Aay, N., Anand, N.K., Arcalas, A., Baik, T., Bowles, O.J., Buhr, C.A., Costanzo, S., Curtis, J.K., Defina, S.C., Dubenko, L., Heuer, T.S., Huang, P., Jaeger, C., Joshi, A., Kennedy, A.R., Kim, A.I., Lara, K., Lee, J., Li, J., Lougheed, J.C., Ma, S., Malek, S., Manalo, J.C., Martini, J.F., Mcgrath, G., Nicoll, M., Nuss, J.M., Pack, M., Peto, C.J., Tsang, T.H., Wang, L., Womble, S.W., Yakes, M., Zhang, W., Rice, K.D.

(2012) Bioorg Med Chem Lett 22: 5396

• PubMed: 22877636 
• DOI: 10.1016/j.bmcl.2012.07.052
• Primary Citation of Related Structures:  
  4AWO, 4AWP, 4AWQ


• PubMed Abstract: 
  

With structural guidance, tropane-derived HTS hits were modified to optimize for HSP90 inhibition and a desirable in vivo profile. Through an iterative SAR development process 12i (XL888) was discovered and shown to reduce HSP90 client protein content in PD studies. Furthermore, efficacy experiments performed in a NCI-N87 mouse xenograft model demonstrated tumor regression in some dosing regimens.

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Organizational Affiliation: 

Exelixis, Inc., 220 East Grand Ave., South San Francisco, CA 94080, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT SHOCK PROTEIN HSP 90-ALPHA	A, B	230	Homo sapiens	Mutation(s): 0  Gene Names: HSP90AA1, HSP90A, HSPC1, HSPCA 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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
99B (Subject of Investigation/LOI)	C [auth A], D [auth B]	5-[(2R)-butan-2-ylamino]-N-{(3-endo)-8-[5-(cyclopropylcarbonyl)pyridin-2-yl]-8-azabicyclo[3.2.1]oct-3-yl}-2-methylbenzene-1,4-dicarboxamide C29 H37 N5 O3 LHGWWAFKVCIILM-HLRQEUIKSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
99B	PDBBind:  4AWO	IC50: 24 (nM) from 1 assay(s)
	Binding MOAD:  4AWO	IC50: 24 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.251 
• R-Value Work: 0.213 
• R-Value Observed: 0.215 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.656	α = 70.87
b = 57.363	β = 87.86
c = 57.442	γ = 68.95

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Ligand Structure Quality Assessment  

Entry History 

Deposition Data

• Deposited Date: 2012-06-05 
• Released Date: 2012-08-29 
Deposition Author(s): Lougheed, J.C., Stout, T.J.

Revision History  

• Version 1.0: 2012-08-29
  Type: Initial release