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: 4.09 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.277 

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
  • Primary Citation of Related Structures:  
    4ANI

  • 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 delineated ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN GRPEA, B, E, F213Geobacillus kaustophilus HTA426Mutation(s): 0 
Gene Names: grpEGK2505
Find proteins for Q5KWZ6 (Geobacillus kaustophilus (strain HTA426))
Explore Q5KWZ6 
Go to UniProtKB:  Q5KWZ6
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CHAPERONE PROTEIN DNAKC, D, G, H509Geobacillus kaustophilus HTA426Mutation(s): 0 
Gene Names: dnaKGK2504
Find proteins for Q5KWZ7 (Geobacillus kaustophilus (strain HTA426))
Explore Q5KWZ7 
Go to UniProtKB:  Q5KWZ7
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.09 Å
  • R-Value Free: 0.347 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.277 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 279.975α = 90
b = 279.975β = 90
c = 278.82γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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