1N1Q

Crystal structure of a Dps protein from Bacillus brevis

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 

Literature

The Multi-layered Structure of Dps with a Novel Di-nuclear Ferroxidase Center

Ren, B., Tibbelin, G., Kajino, T., Asami, O., Ladenstein, R.

(2003) J.Mol.Biol. 329: 467-477


  • PubMed Abstract: 

    • The crystallization of cellular components represents a unique survival strategy for bacterial cells under stressed conditions. A highly ordered, layered structure is often formed in such a process, which may involve one or more than one type of bio- ...

    The crystallization of cellular components represents a unique survival strategy for bacterial cells under stressed conditions. A highly ordered, layered structure is often formed in such a process, which may involve one or more than one type of bio-macromolecules. The main advantage of biocrystallization has been attributed to the fact that it is a physical process and thus is independent of energy consumption. Dps is a protein that crystallizes to form a multi-layered structure in starved cells in order to protect DNA against oxidative damage and other detrimental factors. The multi-layered crystal structure of a Dps protein from Bacillus brevis has been revealed for the first time at atomic resolution in the absence of DNA. Inspection of the structure provides the first direct evidence for the existence of a di-nuclear ferroxidase center, which possesses unique features among all the di-iron proteins identified so far. It constitutes the structural basis for the ferroxidase activity of Dps in the crystalline state as well as in solution. This finding proves that the enzymatic process of detoxification of metal ions, which may cause severe oxidative damage to DNA, is the other important aspect of the defense mechanism performed by Dps. In the multi-layered structure, Dps dodecamers are organized in a highly ordered manner. They adopt the classic form of hexagonal packing in each layer of the structure. Such arrangement results in reinforced structural features that would facilitate the attraction and absorption of metal ions from the environment. The highly ordered layered structure may provide an ideal basis for the accommodation of DNA between the layers so that it can be isolated and protected from harmful factors under stress conditions.

    Organizational Affiliation: 

    Center for Structural Biochemistry, Karolinska Institutet, NOVUM, S-141 57 Huddinge, Sweden. ren@csb.ki.se




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DPS Protein
A, B, C, D
149Brevibacillus brevisMutation(s): 0 
Gene Names: dps
EC: 1.16.-.-
Find proteins for P83695 (Brevibacillus brevis)
Go to UniProtKB:  P83695
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FEO
Query on FEO
Download SDF File 
Download CCD File 
A, B, C, D
MU-OXO-DIIRON
Fe2 O
NPMYUMBHPJGBFA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.196 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 86.911α = 90.00
b = 86.911β = 90.00
c = 220.808γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
MAR345data collection
CNSphasing
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-05-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description