Structure of full length GRP94 with ADP bound

Experimental Data Snapshot

  • Resolution: 2.45 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.250 

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This is version 1.4 of the entry. See complete history


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

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

  • 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.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
666Canis lupus familiarisMutation(s): 0 
Gene Names: HSP90B1TRA1
Find proteins for P41148 (Canis lupus familiaris)
Explore P41148 
Go to UniProtKB:  P41148
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP41148
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
ADP Binding MOAD:  2O1V Kd: 5000 (nM) from 1 assay(s)
PDBBind:  2O1V Kd: 5000 (nM) from 1 assay(s)
BindingDB:  2O1V IC50: 1.14e+4 (nM) from 1 assay(s)
EC50: 2.10e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.45 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.250 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.08α = 90
b = 108.85β = 90
c = 148.98γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
XDSdata reduction
XDSdata scaling
SHELXEmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-10-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Derived calculations, Version format compliance
  • Version 1.2: 2017-08-02
    Changes: Source and taxonomy
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2023-12-27
    Changes: Data collection, Database references, Derived calculations, Refinement description