Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 25.89 kDa 
• Atom Count: 1816 
• Modelled Residue Count: 214 
• Deposited Residue Count: 225 
• Unique protein chains: 1

1BGQ

RADICICOL BOUND TO THE ATP BINDING SITE OF THE N-TERMINAL DOMAIN OF THE YEAST HSP90 CHAPERONE

• PDB DOI: 10.2210/pdb1BGQ/pdb

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


• Deposited: 1998-05-29 Released: 1999-06-08 
• Deposition Author(s): Roe, S.M., Prodromou, C., Pearl, L.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.263 
• R-Value Work: 0.200 
• R-Value Observed: 0.200 

Literature

Structural basis for inhibition of the Hsp90 molecular chaperone by the antitumor antibiotics radicicol and geldanamycin.

Roe, S.M., Prodromou, C., O'Brien, R., Ladbury, J.E., Piper, P.W., Pearl, L.H.

(1999) J Med Chem 42: 260-266

• PubMed: 9925731 
• DOI: 10.1021/jm980403y
• Primary Citation of Related Structures:  
  1BGQ


• PubMed Abstract: 
  

The cellular activity of several regulatory and signal transduction proteins, which depend on the Hsp90 molecular chaperone for folding, is markedly decreased by geldanamycin and by radicicol (monorden). We now show that these unrelated compounds both bind to the N-terminal ATP/ADP-binding domain of Hsp90, with radicicol displaying nanomolar affinity, and both inhibit the inherent ATPase activity of Hsp90 which is essential for its function in vivo. Crystal structure determinations of Hsp90 N-terminal domain complexes with geldanamycin and radicicol identify key aspects of their nucleotide mimicry and suggest a rational basis for the design of novel antichaperone drugs.

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Related Citations: 

• Identification and Structural Characterization of the ATP/Adp-Binding Site in the Hsp90 Molecular Chaperone
  Prodromou, C., Roe, S.M., O'Brien, R., Ladbury, J.E., Piper, P.W., Pearl, L.H.
  (1997) Cell 90: 65

• Expression and Crystallization of the Yeast Hsp82 Chaperone, and Preliminary X-Ray Diffraction Studies of the Amino-Terminal Domain
  Prodromou, C., Piper, P.W., Pearl, L.H.
  (1996) Proteins 25: 517

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, University College London, Gower Street, London WC1E 6BT, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT SHOCK PROTEIN 90	A	225	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
RDC	B [auth A]	RADICICOL C18 H17 Cl O6 WYZWZEOGROVVHK-GTMNPGAYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
RDC	Binding MOAD:  1BGQ	Kd: 2.7 (nM) from 1 assay(s)
	PDBBind:  1BGQ	Kd: 2.7 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.263 
• R-Value Work: 0.200 
• R-Value Observed: 0.200 
• Space Group: P 4₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.94	α = 90
b = 73.94	β = 90
c = 110.86	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-05-29 
• Released Date: 1999-06-08 
Deposition Author(s): Roe, S.M., Prodromou, C., Pearl, L.H.

Revision History  

• Version 1.0: 1999-06-08
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance