1SF8

Crystal structure of the carboxy-terminal domain of htpG, the E. coli Hsp90


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The crystal structure of the carboxy-terminal dimerization domain of htpG, the Escherichia coli Hsp90, reveals a potential substrate binding site.

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

(2004) Structure 12: 1087-1097

  • DOI: 10.1016/j.str.2004.03.020
  • Primary Citation of Related Structures:  
    1SF8

  • PubMed Abstract: 
  • Hsp90 is a ubiquitous, well-conserved molecular chaperone involved in the folding and stabilization of diverse proteins. Beyond its capacity for general protein folding, Hsp90 influences a wide array of cellular signaling pathways that underlie key biological and disease processes ...

    Hsp90 is a ubiquitous, well-conserved molecular chaperone involved in the folding and stabilization of diverse proteins. Beyond its capacity for general protein folding, Hsp90 influences a wide array of cellular signaling pathways that underlie key biological and disease processes. It has been proposed that Hsp90 functions as a molecular clamp, dimerizing through its carboxy-terminal domain and utilizing ATP binding and hydrolysis to drive large conformational changes including transient dimerization of the amino-terminal and middle domains. We have determined the 2.6 A X-ray crystal structure of the carboxy-terminal domain of htpG, the Escherichia coli Hsp90. This structure reveals a novel fold and that dimerization is dependent upon the formation of a four-helix bundle. Remarkably, proximal to the helical dimerization motif, each monomer projects a short helix into solvent. The location, flexibility, and amphipathic character of this helix suggests that it may play a role in substrate binding and hence chaperone activity.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chaperone protein htpG
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
126Escherichia coliMutation(s): 3 
Gene Names: htpGb0473C0593Z0590ECS0526
UniProt
Find proteins for P0A6Z3 (Escherichia coli (strain K12))
Explore P0A6Z3 
Go to UniProtKB:  P0A6Z3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6Z3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.516α = 90
b = 103.516β = 90
c = 249.738γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
MOSFLMdata reduction
ELVESdata reduction
SCALEPACKdata scaling
CCP4data scaling
ELVESdata scaling
MLPHAREphasing
ELVESphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-15
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance