Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 26.97 kDa 
• Atom Count: 1,931 
• Modelled Residue Count: 208 
• Deposited Residue Count: 236 
• Unique protein chains: 1

 1UY6

Human Hsp90-alpha with 9-Butyl-8-(3,4,5-trimethoxy-benzyl)-9H-purin-6-ylamine

• PDB DOI:  https://doi.org/10.2210/pdb1UY6/pdb

• Classification: CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-03-02 Released: 2004-07-01 
• Deposition Author(s): Wright, L., Barril, X., Dymock, B., Sheridan, L., Surgenor, A., Beswick, M., Drysdale, M., Collier, A., Massey, A., Davies, N., Fink, A., Fromont, C., Aherne, W., Boxall, K., Sharp, S., Workman, P., Hubbard, R.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.231 
• R-Value Work: 0.182 
• R-Value Observed: 0.184 

Literature

Structure-Activity Relationships in Purine-Based Inhibitor Binding to Hsp90 Isoforms

Wright, L., Barril, X., Dymock, B., Sheridan, L., Surgenor, A., Beswick, M., Drysdale, M., Collier, A., Massey, A., Davies, N., Fink, A., Fromont, C., Aherne, W., Boxall, K., Sharp, S., Workman, P., Hubbard, R.E.

(2004) Chem Biol 11: 775

• PubMed: 15217611 
• DOI: https://doi.org/10.1016/j.chembiol.2004.03.033
• Primary Citation of Related Structures:  
  1UY6, 1UY7, 1UY8, 1UY9, 1UYC, 1UYD, 1UYE, 1UYF, 1UYG, 1UYH, 1UYI, 1UYK, 1UYL, 1UYM


• PubMed Abstract: 
  

Inhibition of the ATPase activity of the chaperone protein HSP90 is a potential strategy for treatment of cancers. We have determined structures of the HSP90alpha N-terminal domain complexed with the purine-based inhibitor, PU3, and analogs with enhanced potency both in enzyme and cell-based assays. The compounds induce upregulation of HSP70 and downregulation of the known HSP90 client proteins Raf-1, CDK4, and ErbB2, confirming that the molecules inhibit cell growth by a mechanism dependent on HSP90 inhibition. We have also determined the first structure of the N-terminal domain of HSP90beta, complexed with PU3. The structures allow a detailed rationale to be developed for the observed affinity of the PU3 class of compounds for HSP90 and also provide a structural framework for design of compounds with improved binding affinity and drug-like properties.

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Organizational Affiliation: 

Vernalis (R&D) Ltd., Granta Park, Abington, Cambridge CB1 6GB, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT SHOCK PROTEIN HSP 90-ALPHA	A	236	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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PU3	B [auth A]	9-BUTYL-8-(3,4,5-TRIMETHOXYBENZYL)-9H-PURIN-6-AMINE C19 H25 N5 O3 TUOSCZDRWRYPRS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
PU3	Binding MOAD:  1UY6	IC50: 2.00e+5 (nM) from 1 assay(s)
	BindingDB:  1UY6	IC50: min: 1000, max: 2.00e+5 (nM) from 2 assay(s)
		EC50: min: 3200, max: 4.00e+4 (nM) from 3 assay(s)
	PDBBind:  1UY6	IC50: 2.00e+5 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.231 
• R-Value Work: 0.182 
• R-Value Observed: 0.184 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.93	α = 90
b = 91.017	β = 90
c = 98.331	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-07-01 
Deposition Author(s): Wright, L., Barril, X., Dymock, B., Sheridan, L., Surgenor, A., Beswick, M., Drysdale, M., Collier, A., Massey, A., Davies, N., Fink, A., Fromont, C., Aherne, W., Boxall, K., Sharp, S., Workman, P., Hubbard, R.E.

Revision History  

• Version 1.0: 2004-07-01
  Type: Initial release
  
• Version 1.1: 2011-05-07
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance