Biological Assembly 1  

 3D View: Structure | Electron Density | 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: 154.33 kDa 
• Atom Count: 9559 
• Residue Count: 1153 
• Unique protein chains: 1

2O1U

Structure of full length GRP94 with AMP-PNP bound

• DOI: 10.2210/pdb2O1U/pdb

• Classification: CHAPERONE
• Organism(s): Canis lupus familiaris
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-11-29 Released: 2007-10-23 
• Deposition Author(s): Dollins, D.E., Warren, J.J., Immormino, R.M., Gewirth, D.T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.289 
• R-Value Work: 0.243 
• R-Value Observed: 0.245 

Literature

Structures of GRP94-Nucleotide Complexes Reveal Mechanistic Differences between the hsp90 Chaperones.

Dollins, D.E., Warren, J.J., Immormino, R.M., Gewirth, D.T.

(2007) Mol Cell 28: 41-56

• PubMed: 17936703 
• DOI: 10.1016/j.molcel.2007.08.024
• Primary Citation of Related Structures:  
  2O1W, 2O1V, 2O1U, 2O1T


• PubMed Abstract: 
  

GRP94, an essential endoplasmic reticulum chaperone, is required for the conformational maturation of proteins destined for cell-surface display or export. The extent to which GRP94 and its cytosolic paralog, Hsp90, share a common mechanism remains controversial. GRP94 has not been shown conclusively to hydrolyze ATP or bind cochaperones, and both activities, by contrast, result in conformational changes and N-terminal dimerization in Hsp90 that are critical for its function. Here, we report the 2.4 A crystal structure of mammalian GRP94 in complex with AMPPNP and ADP. The chaperone is conformationally insensitive to the identity of the bound nucleotide, adopting a "twisted V" conformation that precludes N-terminal domain dimerization. We also present conclusive evidence that GRP94 possesses ATPase activity. Our observations provide a structural explanation for GRP94's observed rate of ATP hydrolysis and suggest a model for the role of ATP binding and hydrolysis in the GRP94 chaperone cycle.

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Organizational Affiliation: 

Hauptman-Woodward Medical Research Institute, 700 Ellicott Street, Buffalo, NY 14203, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Endoplasmin	A, B	666	Canis lupus familiaris	Mutation(s): 0  Gene Names: HSP90B1, TRA1
Find proteins for P41148 (Canis lupus familiaris) Explore P41148  Go to UniProtKB:  P41148

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ANP	A, B	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER C10 H17 N6 O12 P3 PVKSNHVPLWYQGJ-KQYNXXCUSA-N
MG	A, B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.289 
• R-Value Work: 0.243 
• R-Value Observed: 0.245 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 99.33	α = 90
b = 109.26	β = 90
c = 148.887	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
ADSC	data collection
XDS	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-11-29 
• Released Date: 2007-10-23 
Deposition Author(s): Dollins, D.E., Warren, J.J., Immormino, R.M., Gewirth, D.T.

Revision History 

• Version 1.0: 2007-10-23
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2017-08-02
  Changes: Source and taxonomy