1QY5

Crystal Structure of the N-domain of the ER Hsp90 chaperone GRP94 in complex with the specific ligand NECA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the N-terminal domain of GRP94. Basis for ligand specificity and regulation

Soldano, K.L.Jivan, A.Nicchitta, C.V.Gewirth, D.T.

(2003) J.Biol.Chem. 278: 48330-48338

  • DOI: 10.1074/jbc.M308661200
  • Primary Citation of Related Structures:  1QY8, 1QYE, 1QYH, 1U2O

  • PubMed Abstract: 
  • GRP94, the endoplasmic reticulum (ER) paralog of the chaperone Hsp90, plays an essential role in the structural maturation or secretion of a subset of proteins destined for transport to the cell surface, such as the Toll-like receptors 2 and 4, and I ...

    GRP94, the endoplasmic reticulum (ER) paralog of the chaperone Hsp90, plays an essential role in the structural maturation or secretion of a subset of proteins destined for transport to the cell surface, such as the Toll-like receptors 2 and 4, and IgG, respectively. GRP94 differs from cytoplasmic Hsp90 by exhibiting very weak ATP binding and hydrolysis activity. GRP94 also binds selectively to a series of substituted adenosine analogs. The high resolution crystal structures at 1.75-2.1 A of the N-terminal and adjacent charged domains of GRP94 in complex with N-ethylcarboxamidoadenosine, radicicol, and 2-chlorodideoxyadenosine reveals a structural mechanism for ligand discrimination among hsp90 family members. The structures also identify a putative subdomain that may act as a ligand-responsive switch. The residues of the charged region fold into a disordered loop whose termini are ordered and continue the twisted beta sheet that forms the structural core of the N-domain. This continuation of the beta sheet past the charged domain suggests a structural basis for the association of the N-terminal and middle domains of the full-length chaperone.


    Organizational Affiliation

    Departments of Biochemistry and Cell Biology, Duke University Medical Center, Durham, North Carolina 27710, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endoplasmin
A
269Canis lupus familiarisGene Names: HSP90B1 (GRP94, TRA1)
Find proteins for P41148 (Canis lupus familiaris)
Go to Gene View: HSP90B1
Go to UniProtKB:  P41148
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NEC
Query on NEC

Download SDF File 
Download CCD File 
A
N-ETHYL-5'-CARBOXAMIDO ADENOSINE
C12 H16 N6 O4
JADDQZYHOWSFJD-FLNNQWSLSA-N
 Ligand Interaction
M2M
Query on M2M

Download SDF File 
Download CCD File 
A
1-METHOXY-2-(2-METHOXYETHOXY)ETHANE
C6 H14 O3
SBZXBUIDTXKZTM-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
NECKd: 200 nM (99) BINDINGDB
NECKd: 200 nM BINDINGMOAD
NECKd: 200 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.206 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 89.200α = 90.00
b = 99.180β = 90.00
c = 63.071γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance