2V7Y

Crystal structure of the molecular chaperone DnaK from Geobacillus kaustophilus HTA426 in post-ATP hydrolysis state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 

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This is version 1.3 of the entry. See complete history


Literature

Crystal Structures of the 70-kDa Heat Shock Proteins in Domain Disjoining Conformation.

Chang, Y.-W.Sun, Y.-J.Wang, C.Hsiao, C.-D.

(2008) J Biol Chem 283: 15502

  • DOI: https://doi.org/10.1074/jbc.M708992200
  • Primary Citation of Related Structures:  
    2V7Y, 2V7Z

  • PubMed Abstract: 

    The 70-kDa heat shock proteins (Hsp70s) are highly conserved ATP-dependent molecular chaperones composed of an N-terminal nucleotide binding domain (NBD) and a C-terminal protein substrate binding domain (SBD) in a bilobate structure. Interdomain communication and nucleotide-dependent structural motions are critical for Hsp70 chaperone functions. Our understanding of these functions remains elusive due to insufficient structural information on intact Hsp70s that represent the different states of the chaperone cycle. We report here the crystal structures of DnaK from Geobacillus kaustophilus HTA426 bound with ADP-Mg(2+)-P(i) at 2.37A and the 70-kDa heat shock cognate protein from Rattus norvegicus bound with ADP-P(i) at 3.5A(.) The NBD and SBD in these structures are significantly separated from each other, and they might depict the ADP-bound conformation. Moreover, a Trp reporter was introduced at the potential interface region between NBD and the interdomain linker of GkDnaK to probe environmental changes. Results from fluorescence measurements support the notion that substrate binding enhances the domain-disjoining behavior of Hsp70 chaperones.


  • Organizational Affiliation

    Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CHAPERONE PROTEIN DNAK509Geobacillus kaustophilus HTA426Mutation(s): 0 
UniProt
Find proteins for Q5KWZ7 (Geobacillus kaustophilus (strain HTA426))
Explore Q5KWZ7 
Go to UniProtKB:  Q5KWZ7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5KWZ7
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.227 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.753α = 90
b = 71.455β = 90
c = 183.864γ = 90
Software Package:
Software NamePurpose
CNSrefinement
Blu-Icedata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-04-08
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description