Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 63.95 kDa 
• Atom Count: 4685 
• Modelled Residue Count: 576 
• Deposited Residue Count: 582 
• Unique protein chains: 1

1VZY

Crystal structure of the Bacillus subtilis HSP33

• DOI: 10.2210/pdb1VZY/pdb

• Classification: CHAPERONE
• Organism(s): Bacillus subtilis subsp. subtilis str. 168
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2004-05-29 Released: 2004-10-06 
• Deposition Author(s): Janda, I.K., Devedjiev, Y., Derewenda, U., Dauter, Z., Bielnicki, J., Cooper, D.R., Joachimiak, A., Derewenda, Z.S., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 0.225 
• R-Value Work: 0.197 

Literature

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

• PubMed: 15458638 
• DOI: 10.1016/j.str.2004.08.003
• Primary Citation of Related Structures:  
  1VZY


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
33 KDA CHAPERONIN	A, B	291	Bacillus subtilis subsp. subtilis str. 168	Mutation(s): 2  Gene Names: hslO, yacC, BSU00710
UniProt
Find proteins for P37565 (Bacillus subtilis (strain 168)) Explore P37565  Go to UniProtKB:  P37565

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A], H [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACT	D [auth A], E [auth A], F [auth A], G [auth A], I [auth B], J [auth B]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 115.292	α = 90
b = 115.292	β = 90
c = 106.441	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
MLPHARE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-05-29 
• Released Date: 2004-10-06 
Deposition Author(s): Janda, I.K., Devedjiev, Y., Derewenda, U., Dauter, Z., Bielnicki, J., Cooper, D.R., Joachimiak, A., Derewenda, Z.S., Midwest Center for Structural Genomics (MCSG)

Revision History  

• 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