2BRC

Structure of a Hsp90 Inhibitor bound to the N-terminus of Yeast Hsp90.

• PDB DOI: https://doi.org/10.2210/pdb2BRC/pdb

• Classification: CHAPERONE
• Organism(s): Saccharomyces cerevisiae
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2005-05-04 Released: 2005-09-29 
• Deposition Author(s): Roe, S.M., Pearl, L.H., Prodromou, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.214 
• R-Value Work: 0.187 
• R-Value Observed: 0.188 

Literature

The identification, synthesis, protein crystal structure and in vitro biochemical evaluation of a new 3,4-diarylpyrazole class of Hsp90 inhibitors.

Cheung, K.M., Matthews, T.P., James, K., Rowlands, M.G., Boxall, K.J., Sharp, S.Y., Maloney, A., Roe, S.M., Prodromou, C., Pearl, L.H., Aherne, G.W., McDonald, E., Workman, P.

(2005) Bioorg Med Chem Lett 15: 3338-3343

• PubMed: 15955698 
• DOI: https://doi.org/10.1016/j.bmcl.2005.05.046
• Primary Citation of Related Structures:  
  2BRC, 2BRE


• PubMed Abstract: 
  

  High-throughput screening identified the 3,4-diarylpyrazole CCT018159 as a novel and potent (7.1 microM) inhibitor of Hsp90 ATPase activity. Here, we describe the synthesis of CCT018159 and a number of close analogues together with data on their biochemical properties. Some initial structure-activity relationships are discussed, as well as the crystal structure of CCT018159 bound to Hsp90.

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Organizational Affiliation: 

Cancer Research UK Centre for Cancer Therapeutics, The Institute of Cancer Research, Cancer Research UK and Haddow Laboratories, 15 Cotswold Road, Sutton, Surrey SM2 5NG, UK.

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: 24.56 kDa 
• Atom Count: 1,948 
• Modelled Residue Count: 214 
• Deposited Residue Count: 214 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-DEPENDENT MOLECULAR CHAPERONE HSP82	A	214	Saccharomyces cerevisiae	Mutation(s): 0
UniProt
Find proteins for P02829 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P02829  Go to UniProtKB:  P02829

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CT5	B [auth A]	4-[4-(2,3-DIHYDRO-1,4-BENZODIOXIN-6-YL)-3-METHYL-1H-PYRAZOL-5-YL]-6-ETHYLBENZENE-1,3-DIOL C20 H20 N2 O4 OWPMENVYXDJDOW-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
CT5	Binding MOAD:  2BRC	IC50: 7100 (nM) from 1 assay(s)
	PDBBind:  2BRC	IC50: 8900 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.214 
• R-Value Work: 0.187 
• R-Value Observed: 0.188 
• Space Group: P 4₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 74.001	α = 90
b = 74.001	β = 90
c = 110.792	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-09-29 
Deposition Author(s): Roe, S.M., Pearl, L.H., Prodromou, C.

Revision History  

• Version 1.0: 2005-09-29
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-02-28
  Changes: Database references
• Version 1.4: 2023-12-13
  Changes: Data collection, Database references, Other, Refinement description