2O1T

Structure of Middle plus C-terminal domains (M+C) of GRP94


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.284 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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

  • DOI: 10.1016/j.molcel.2007.08.024
  • Primary Citation of Related Structures:  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 c ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endoplasmin
A, B, C, D, E, F, G, H, I, J
450Canis lupus familiarisGene Names: HSP90B1 (GRP94, TRA1)
Find proteins for P41148 (Canis lupus familiaris)
Go to Gene View: HSP90B1
Go to UniProtKB:  P41148
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.284 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 131.300α = 90.00
b = 129.540β = 99.91
c = 184.780γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata scaling
XDSdata reduction
SHELXEmodel building
MAR345data collection
SHELXCDphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Derived calculations, Version format compliance
  • Version 1.2: 2017-10-18
    Type: Refinement description