5NRO image
Deposition Date 2017-04-25
Release Date 2018-01-17
Last Version Date 2024-11-06
Entry Detail
PDB ID:
5NRO
Keywords:
Title:
Structure of full-length DnaK with bound J-domain
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.25 Å
R-Value Free:
0.23
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 62 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Chaperone protein DnaK
Gene (Uniprot):dnaK
Mutations:E47C, T199A, F529C
Chain IDs:A
Chain Length:611
Number of Molecules:1
Biological Source:Escherichia coli
Polymer Type:polypeptide(L)
Molecule:Chaperone protein DnaJ
Gene (Uniprot):dnaJ
Chain IDs:B
Chain Length:108
Number of Molecules:1
Biological Source:Escherichia coli
Primary Citation
Molecular Mechanism of J-Domain-Triggered ATP Hydrolysis by Hsp70 Chaperones.
Mol. Cell 69 227 237.e4 (2018)
PMID: 29290615 DOI: 10.1016/j.molcel.2017.12.003

Abstact

Efficient targeting of Hsp70 chaperones to substrate proteins depends on J-domain cochaperones, which in synergism with substrates trigger ATP hydrolysis in Hsp70s and concomitant substrate trapping. We present the crystal structure of the J-domain of Escherichia coli DnaJ in complex with the E. coli Hsp70 DnaK. The J-domain interacts not only with DnaK's nucleotide-binding domain (NBD) but also with its substrate-binding domain (SBD) and packs against the highly conserved interdomain linker. Mutational replacement of contacts between J-domain and SBD strongly reduces the ability of substrates to stimulate ATP hydrolysis in the presence of DnaJ and compromises viability at heat shock temperatures. Our data demonstrate that the J-domain and the substrate do not deliver completely independent signals for ATP hydrolysis, but the J-domain, in addition to its direct influence on Hsp70s catalytic center, makes Hsp70 more responsive for the hydrolysis-inducing signal of the substrate, resulting in efficient substrate trapping.

Legend

Protein

Chemical

Disease

Primary Citation of related structures