Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 44087.33 
• Atom Count: 2920 
• Residue Count: 394 
• Unique protein chains: 1

5AR0

HSP72 with adenosine-derived inhibitor

• DOI: 10.2210/pdb5AR0/pdb

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


• Deposited: 2015-09-22 Released: 2016-05-11 
• Deposition Author(s): Cheeseman, M.D., Westwood, I.M., Barbeau, O., Rowlands, M.G., Jones, A.M., Jeganathan, F., Burke, R., Dobson, S.E., Workman, P., Collins, I., van Montfort, R.L.M., Jones, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.210 
• R-Value Work: 0.172 

Literature

Exploiting Protein Conformational Change to Optimize Adenosine-Derived Inhibitors of Hsp70.

Cheeseman, M.D., Westwood, I.M., Barbeau, O., Rowlands, M.G., Dobson, S., Jones, A.M., Jeganathan, F., Burke, R., Kadi, N., Workman, P., Collins, I., Van Montfort, R.L.M., Jones, K.

(2016) J.Med.Chem. 59: 4625

• PubMed: 27119979 
• DOI: 10.1021/acs.jmedchem.5b02001
• Primary Citation of Related Structures:  
  5AQZ


• PubMed Abstract: 
  

HSP70 is a molecular chaperone and a key component of the heat-shock response. Because of its proposed importance in oncology, this protein has become a popular target for drug discovery, efforts which have as yet brought little success. This study demonstrates that adenosine-derived HSP70 inhibitors potentially bind to the protein with a novel mechanism of action, the stabilization by desolvation of an intramolecular salt-bridge which induces a conformational change in the protein, leading to high affinity ligands. We also demonstrate that through the application of this mechanism, adenosine-derived HSP70 inhibitors can be optimized in a rational manner.

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Organizational Affiliation: 

Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research , London SW7 3RP, U.K.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEAT SHOCK 70 KDA PROTEIN 1A	A	394	Homo sapiens	Mutation(s): 0  Gene Names: HSPA1A (HSP72, HSPA1, HSX70)
Find proteins for P0DMV8 (Homo sapiens) Go to Gene View: HSPA1A Go to UniProtKB:  P0DMV8

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
GOL	A	GLYCEROL GLYCERIN; PROPANE-1,2,3-TRIOL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
GB8	A	(2R,3R,4S,5R)-2-(6-amino-8-((quinolin-7-ylmethyl)amino)-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydrofuran-3,4-diol C20 H21 N7 O4 ZPAVHMFARWZWPX-NVQRDWNXSA-N
DMS	A	DIMETHYL SULFOXIDE C2 H6 O S IAZDPXIOMUYVGZ-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
GB8	IC50: 2900 nM (99) BINDINGDB
GB8	Ki: 1290 nM (99) BINDINGDB
GB8	Kd: 720 - 724 nM (88) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.210 
• R-Value Work: 0.172 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 47.880	α = 90.00
b = 80.545	β = 90.00
c = 92.979	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
BUSTER	refinement
XDS	data reduction
Aimless	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-09-22 
• Released Date: 2016-05-11 
• Deposition Author(s): Cheeseman, M.D., Westwood, I.M., Barbeau, O., Rowlands, M.G., Jones, A.M., Jeganathan, F., Burke, R., Dobson, S.E., Workman, P., Collins, I., van Montfort, R.L.M., Jones, K.

Revision History 

• Version 1.0: 2016-05-11
  Type: Initial release
• Version 1.1: 2016-06-08
  Type: Database references