4B9Q

Open conformation of ATP-bound Hsp70 homolog DnaK


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.199 

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This is version 1.3 of the entry. See complete history


Literature

Structure and Dynamics of the ATP-Bound Open Conformation of Hsp70 Chaperones

Kityk, R.Kopp, J.Sinning, I.Mayer, M.P.

(2012) Mol Cell 48: 863

  • DOI: 10.1016/j.molcel.2012.09.023
  • Primary Citation of Related Structures:  
    4B9Q

  • PubMed Abstract: 
  • Central to the chaperone function of Hsp70s is the transition between open and closed conformations of their polypeptide substrate binding domain (SBD), which is regulated through an allosteric mechanism via ATP binding and hydrolysis in their nucleotide binding domain (NBD) ...

    Central to the chaperone function of Hsp70s is the transition between open and closed conformations of their polypeptide substrate binding domain (SBD), which is regulated through an allosteric mechanism via ATP binding and hydrolysis in their nucleotide binding domain (NBD). Although the structure of the closed conformation of Hsp70s is well studied, the open conformation has remained elusive. Here, we report on the 2.4 Å crystal structure of the ATP-bound open conformation of the Escherichia coli Hsp70 homolog DnaK. In the open DnaK structure, the β sheet and α-helical lid subdomains of the SBD are detached from one another and docked to different faces of the NBD. The contacts between the β sheet subdomain and the NBD reveal the mechanism of allosteric regulation. In addition, we demonstrate that docking of the β sheet and α-helical lid subdomains to the NBD is a sequential process influenced by peptide and protein substrates.


    Organizational Affiliation

    Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHAPERONE PROTEIN DNAKA, B, C, D605Escherichia coliMutation(s): 3 
UniProt
Find proteins for P0A6Y8 (Escherichia coli (strain K12))
Explore P0A6Y8 
Go to UniProtKB:  P0A6Y8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, DL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.199 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 202.331α = 90
b = 77.47β = 101.71
c = 182.96γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-11-14
    Type: Initial release
  • Version 1.1: 2012-11-21
    Changes: Database references
  • Version 1.2: 2013-01-09
    Changes: Database references
  • Version 1.3: 2019-05-22
    Changes: Data collection, Derived calculations, Experimental preparation, Other