1AH8

STRUCTURE OF THE ORTHORHOMBIC FORM OF THE N-TERMINAL DOMAIN OF THE YEAST HSP90 CHAPERONE

• PDB DOI: https://doi.org/10.2210/pdb1AH8/pdb

• Classification: CHAPERONE
• Organism(s): Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 1997-04-14 Released: 1997-10-22 
• Deposition Author(s): Prodromou, C., Roe, S.M., Pearl, L.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.255 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 

Starting Model: experimental

Literature

A molecular clamp in the crystal structure of the N-terminal domain of the yeast Hsp90 chaperone.

Prodromou, C., Roe, S.M., Piper, P.W., Pearl, L.H.

(1997) Nat Struct Biol 4: 477-482

• PubMed: 9187656 
• DOI: https://doi.org/10.1038/nsb0697-477
• Primary Citation of Related Structures:  
  1AH6, 1AH8


• PubMed Abstract: 
  

  Hsp90 is a highly specific chaperone for many signal transduction proteins, including steroid hormone receptors and a broad range of protein kinases. The crystal structure of the N-terminal domain of the yeast Hsp90 reveals a dimeric structure based on a highly twisted sixteen stranded beta-sheet, whose topology suggests a possible 30-domain-swapped structure for the intact Hsp90 dimer. The opposing faces of the beta-sheets in the dimer define a potential peptide-binding cleft, suggesting that the N-domain may serve as a molecular 'clamp' in the binding of ligand proteins to Hsp90.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, University College London, UK.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 50.12 kDa 
• Atom Count: 3,986 
• Modelled Residue Count: 433 
• Deposited Residue Count: 440 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT SHOCK PROTEIN 90	A, B	220	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
GOL	C [auth A], D [auth B], E [auth B], F [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.255 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 115.54	α = 90
b = 112.9	β = 90
c = 44.72	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-10-22 
Deposition Author(s): Prodromou, C., Roe, S.M., Pearl, L.H.

Revision History  

• Version 1.0: 1997-10-22
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description
• Version 1.4: 2024-04-03
  Changes: Refinement description