1TC6

Ligand Induced Conformational Shift in the N-terminal Domain of GRP94, Open Conformation ADP-Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Ligand-induced Conformational Shift in the N-terminal Domain of GRP94, an Hsp90 Chaperone.

Immormino, R.M.Dollins, D.E.Shaffer, P.L.Soldano, K.L.Walker, M.A.Gewirth, D.T.

(2004) J Biol Chem 279: 46162-46171

  • DOI: 10.1074/jbc.M405253200
  • Primary Citation of Related Structures:  
    1TC6, 1TC0, 1TBW

  • PubMed Abstract: 
  • GRP94 is the endoplasmic reticulum paralog of cytoplasmic Hsp90. Models of Hsp90 action posit an ATP-dependent conformational switch in the N-terminal ligand regulatory domain of the chaperone. However, crystal structures of the isolated N-domain of Hsp90 in complex with a variety of ligands have yet to demonstrate such a conformational change ...

    GRP94 is the endoplasmic reticulum paralog of cytoplasmic Hsp90. Models of Hsp90 action posit an ATP-dependent conformational switch in the N-terminal ligand regulatory domain of the chaperone. However, crystal structures of the isolated N-domain of Hsp90 in complex with a variety of ligands have yet to demonstrate such a conformational change. We have determined the structure of the N-domain of GRP94 in complex with ATP, ADP, and AMP. Compared with the N-ethylcarboxamidoadenosine and radicicol-bound forms, these structures reveal a large conformational rearrangement in the protein. The nucleotide-bound form exposes new surfaces that interact to form a biochemically plausible dimer that is reminiscent of those seen in structures of MutL and DNA gyrase. Weak ATP binding and a conformational change in response to ligand identity are distinctive mechanistic features of GRP94 and suggest a model for how GRP94 functions in the absence of co-chaperones and ATP hydrolysis.


    Organizational Affiliation

    Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EndoplasminA, B236Canis lupus familiarisMutation(s): 0 
Gene Names: TRA1
UniProt
Find proteins for P41148 (Canis lupus familiaris)
Explore P41148 
Go to UniProtKB:  P41148
Protein Feature View
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
ADP BindingDB:  1TC6 IC50: 1.14e+4 (nM) from 1 assay(s)
EC50: 2.10e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 159.234α = 90
b = 159.234β = 90
c = 109.07γ = 120
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-08-09
    Changes: Source and taxonomy