2IOQ

Crystal Structure of full-length HTPG, the Escherichia coli HSP90


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.370 
  • R-Value Work: 0.329 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Analysis of E. coli hsp90 reveals dramatic nucleotide-dependent conformational rearrangements.

Shiau, A.K.Harris, S.F.Southworth, D.R.Agard, D.A.

(2006) Cell 127: 329-340

  • DOI: 10.1016/j.cell.2006.09.027
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In eukaryotes, the ubiquitous and abundant members of the 90 kilodalton heat-shock protein (hsp90) chaperone family facilitate the folding and conformational changes of a broad array of proteins important in cell signaling, proliferation, and surviva ...

    In eukaryotes, the ubiquitous and abundant members of the 90 kilodalton heat-shock protein (hsp90) chaperone family facilitate the folding and conformational changes of a broad array of proteins important in cell signaling, proliferation, and survival. Here we describe the effects of nucleotides on the structure of full-length HtpG, the Escherichia coli hsp90 ortholog. By electron microscopy, the nucleotide-free, AMPPNP bound, and ADP bound states of HtpG adopt completely distinct conformations. Structural characterization of nucleotide-free and ADP bound HtpG was extended to higher resolution by X-ray crystallography. In the absence of nucleotide, HtpG exhibits an "open" conformation in which the three domains of each monomer present hydrophobic elements into the large cleft formed by the dimer. By contrast, ADP binding drives dramatic conformational changes that allow these hydrophobic elements to converge and shield each other from solvent, suggesting a mechanism by which nucleotides could control client protein binding and release.


    Organizational Affiliation

    Howard Hughes Medical Institute and Department of Biochemistry and Biophysics, University of California, San Francisco, 94158, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chaperone protein htpG
A, B
624Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: htpG
Find proteins for P0A6Z3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6Z3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.370 
  • R-Value Work: 0.329 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 105.124α = 90.00
b = 105.124β = 90.00
c = 531.077γ = 120.00
Software Package:
Software NamePurpose
CNSphasing
CNSrefinement
ADSCdata collection
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-21
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance