6JZB

Structural characterization of DnaJ from Streptococcus pneumonia presents a new tetramer of Hsp40 family


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural insights into the formation of oligomeric state by a type I Hsp40 chaperone.

Zhu, M.Ou, D.Khan, M.H.Zhao, S.Zhu, Z.Niu, L.

(2020) Biochimie 176: 45-51

  • DOI: 10.1016/j.biochi.2020.06.009
  • Primary Citation of Related Structures:  
    6JZB

  • PubMed Abstract: 
  • Molecular chaperones can prevent and repair protein misfolding and aggregation to maintain protein homeostasis in cells. Hsp40 chaperones interact with unfolded client proteins via the dynamic multivalent interaction (DMI) mechanism with their multiple client-binding sites ...

    Molecular chaperones can prevent and repair protein misfolding and aggregation to maintain protein homeostasis in cells. Hsp40 chaperones interact with unfolded client proteins via the dynamic multivalent interaction (DMI) mechanism with their multiple client-binding sites. Here we report that a type I Hsp40 chaperone from Streptococcus pneumonia (spHsp40) forms a concentration-independent polydispersity oligomer state in solution. The crystal structure of spHsp40 determined at 2.75 Å revealed that each monomer has a type I Hsp40 structural fold containing a zinc finger domain and C-terminal domains I and II (CTD I and CTD II). Subsequent quaternary structure analysis using a PISA server generated two dimeric models. The interface mutational analysis suggests the conserved C-terminal dimeric motif as a basis for dimer formation and that the novel dimeric interaction between a client-binding site in CTD I and the zinc finger domain promotes the formation of the spHsp40 oligomeric state. In vitro functional analysis demonstrated that spHsp40 oligomer is fully active and possess the optimal activity in stimulating the ATPase activity of spHsp70. The oligomer state of type I Hsp40 and its formation might be important in understanding Hsp40 function and its interaction with client proteins.


    Organizational Affiliation

    School of Life Sciences, University of Science and Technology of China, Hefei, 230026, China; Hefei National Laboratory for Physical Sciences at the Microscale, Division of Molecular and Cellular Biophysics, University of Science and Technology of China, Hefei, 230026, China. Electronic address: lwniu@ustc.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.584α = 90
b = 104.242β = 90
c = 234.622γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASESphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-04-30 
  • Released Date: 2020-11-04 
  • Deposition Author(s): Zhu, M., Zhu, Z.L.

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChinaU1632124

Revision History  (Full details and data files)

  • Version 1.0: 2020-11-04
    Type: Initial release
  • Version 1.1: 2021-05-19
    Changes: Database references