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 
• Residue Count: 409 
• 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.

---

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
• Structures With Same Primary Citation


• 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.

---

Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
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
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
99B	A, 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

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
99B	IC50 :  24   nM  PDBBind
99B	IC50:  24   nM  Binding MOAD

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

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