Crystal structure of the Bacillus subtilis HSP33

Experimental Data Snapshot

  • Resolution: 1.97 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.197 

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The crystal structure of the reduced, Zn2+-bound form of the B. subtilis Hsp33 chaperone and its implications for the activation mechanism.

Janda, I.Devedjiev, Y.Derewenda, U.Dauter, Z.Bielnicki, J.Cooper, D.R.Graf, P.C.Joachimiak, A.Jakob, U.Derewenda, Z.S.

(2004) Structure 12: 1901-1907

  • DOI: https://doi.org/10.1016/j.str.2004.08.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The bacterial heat shock protein Hsp33 is a redox-regulated chaperone activated by oxidative stress. In response to oxidation, four cysteines within a Zn2+ binding C-terminal domain form two disulfide bonds with concomitant release of the metal. This leads to the formation of the biologically active Hsp33 dimer. The crystal structure of the N-terminal domain of the E. coli protein has been reported, but neither the structure of the Zn2+ binding motif nor the nature of its regulatory interaction with the rest of the protein are known. Here we report the crystal structure of the full-length B. subtilis Hsp33 in the reduced form. The structure of the N-terminal, dimerization domain is similar to that of the E. coli protein, although there is no domain swapping. The Zn2+ binding domain is clearly resolved showing the details of the tetrahedral coordination of Zn2+ by four thiolates. We propose a structure-based activation pathway for Hsp33.

  • Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
291Bacillus subtilis subsp. subtilis str. 168Mutation(s): 2 
Find proteins for P37565 (Bacillus subtilis (strain 168))
Explore P37565 
Go to UniProtKB:  P37565
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37565
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.97 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.197 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.292α = 90
b = 115.292β = 90
c = 106.441γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2004-10-06
    Type: Initial release
  • Version 1.1: 2018-03-28
    Changes: Data collection, Database references, Source and taxonomy
  • Version 1.2: 2019-08-21
    Changes: Data collection, Database references