4ANI

Structural basis for the intermolecular communication between DnaK and GrpE in the DnaK chaperone system from Geobacillus kaustophilus HTA426


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.094 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.274 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of Dnak Protein Complexed with Nucleotide Exchange Factor Grpe in Dnak Chaperone System: Insight Into Intermolecular Communication.

Wu, C.-C.Naveen, V.Chien, C.-H.Chang, Y.-W.Hsiao, C.-D.

(2012) J.Biol.Chem. 287: 21461

  • DOI: 10.1074/jbc.M112.344358

  • PubMed Abstract: 
  • The conserved, ATP-dependent bacterial DnaK chaperones process client substrates with the aid of the co-chaperones DnaJ and GrpE. However, in the absence of structural information, how these proteins communicate with each other cannot be fully deline ...

    The conserved, ATP-dependent bacterial DnaK chaperones process client substrates with the aid of the co-chaperones DnaJ and GrpE. However, in the absence of structural information, how these proteins communicate with each other cannot be fully delineated. For the study reported here, we solved the crystal structure of a full-length Geobacillus kaustophilus HTA426 GrpE homodimer in complex with a nearly full-length G. kaustophilus HTA426 DnaK that contains the interdomain linker (acting as a pseudo-substrate), and the N-terminal nucleotide-binding and C-terminal substrate-binding domains at 4.1-Å resolution. Each complex contains two DnaKs and two GrpEs, which is a stoichiometry that has not been found before. The long N-terminal GrpE α-helices stabilize the linker of DnaK in the complex. Furthermore, interactions between the DnaK substrate-binding domain and the N-terminal disordered region of GrpE may accelerate substrate release from DnaK. These findings provide molecular mechanisms for substrate binding, processing, and release during the Hsp70 chaperone cycle.


    Organizational Affiliation

    Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 112, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN GRPE
A, B, E, F
213Geobacillus kaustophilus (strain HTA426)Mutation(s): 0 
Gene Names: grpE
Find proteins for Q5KWZ6 (Geobacillus kaustophilus (strain HTA426))
Go to UniProtKB:  Q5KWZ6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CHAPERONE PROTEIN DNAK
C, D, G, H
509Geobacillus kaustophilus (strain HTA426)Mutation(s): 0 
Gene Names: dnaK
Find proteins for Q5KWZ7 (Geobacillus kaustophilus (strain HTA426))
Go to UniProtKB:  Q5KWZ7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.094 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.274 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 279.975α = 90.00
b = 279.975β = 90.00
c = 278.820γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PHENIXphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-23
    Type: Initial release
  • Version 1.1: 2012-08-01
    Type: Database references