1DG4

NMR STRUCTURE OF THE SUBSTRATE BINDING DOMAIN OF DNAK IN THE APO FORM


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS,TARGET FUNCTION 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insights into substrate binding by the molecular chaperone DnaK.

Pellecchia, M.Montgomery, D.L.Stevens, S.Y.Vander Kooi, C.W.Feng, H.P.Gierasch, L.M.Zuiderweg, E.R.

(2000) Nat.Struct.Mol.Biol. 7: 298-303

  • DOI: 10.1038/74062

  • PubMed Abstract: 
  • How substrate affinity is modulated by nucleotide binding remains a fundamental, unanswered question in the study of 70 kDa heat shock protein (Hsp70) molecular chaperones. We find here that the Escherichia coli Hsp70, DnaK, lacking the entire alpha- ...

    How substrate affinity is modulated by nucleotide binding remains a fundamental, unanswered question in the study of 70 kDa heat shock protein (Hsp70) molecular chaperones. We find here that the Escherichia coli Hsp70, DnaK, lacking the entire alpha-helical domain, DnaK(1-507), retains the ability to support lambda phage replication in vivo and to pass information from the nucleotide binding domain to the substrate binding domain, and vice versa, in vitro. We determined the NMR solution structure of the corresponding substrate binding domain, DnaK(393-507), without substrate, and assessed the impact of substrate binding. Without bound substrate, loop L3,4 and strand beta3 are in significantly different conformations than observed in previous structures of the bound DnaK substrate binding domain, leading to occlusion of the substrate binding site. Upon substrate binding, the beta-domain shifts towards the structure seen in earlier X-ray and NMR structures. Taken together, our results suggest that conformational changes in the beta-domain itself contribute to the mechanism by which nucleotide binding modulates substrate binding affinity.


    Organizational Affiliation

    Biophysics Research Division University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109 USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNAK
A
115Escherichia coli (strain K12)Gene Names: dnaK (groP, grpF, seg)
Find proteins for P0A6Y8 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6Y8
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS,TARGET FUNCTION 
  • Olderado: 1DG4 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-08
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance