2W7W

The crystal structure of iron superoxide dismutase from Aliivibrio salmonicida.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.205 

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This is version 1.2 of the entry. See complete history. 

Literature

The First Structure of a Cold-Adapted Superoxide Dismutase (Sod): Biochemical and Structural Characterization of Iron Sod from Aliivibrio Salmonicida.

Pedersen, H.L., Willassen, N.P., Leiros, I.

(2009) Acta Crystallogr.,Sect.F 65: 84

  • DOI: 10.1107/S1744309109001110

  • PubMed Abstract: 

    • Superoxide dismutases (SODs) are metalloenzymes that catalyse the dismutation of the superoxide radical anion into O(2) and H(2)O(2) in a two-step reaction. The crystal structure of the iron superoxide dismutase from the cold-adapted and fish-pathoge ...

    Superoxide dismutases (SODs) are metalloenzymes that catalyse the dismutation of the superoxide radical anion into O(2) and H(2)O(2) in a two-step reaction. The crystal structure of the iron superoxide dismutase from the cold-adapted and fish-pathogenic bacterium Aliivibrio salmonicida (asFeSOD) has been determined and refined to 1.7 A resolution. The protein has been characterized and compared with the closely related homologous iron superoxide dismutase from the mesophilic Escherichia coli (ecFeSOD) in an attempt to rationalize its environmental adaptation. ecFeSOD shares 75% identity with asFeSOD. Compared with the mesophilic FeSOD, the psychrophilic FeSOD has distinct temperature differences in residual activity and thermostability that do not seem to be related to structural differences such as intramolecular or intermolecular ion bonds, hydrogen bonds or cavity sizes. However, an increased net negative charge on the surface of asFeSOD may explain its lower thermostability compared with ecFeSOD. Activity measurements and differential scanning calorimetry measurements revealed that the psychrophilic asFeSOD had a thermostability that was significantly higher than the optimal growth temperature of the host organism.

    Organizational Affiliation: 

    Department of Molecular Biotechnology, Institute of Medical Biology, University of Tromsø, N-9037 Tromsø, Norway.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SUPEROXIDE DISMUTASE [FE]
A, B
194Aliivibrio salmonicida (strain LFI1238)Mutation(s): 0 
Gene Names: sodB
EC: 1.15.1.1
Find proteins for B6ENP9 (Aliivibrio salmonicida (strain LFI1238))
Go to UniProtKB:  B6ENP9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE
Query on FE
Download SDF File 
Download CCD File 
A, B
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.205 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 70.720α = 90.00
b = 70.720β = 90.00
c = 170.250γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
MOLREPphasing
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-17
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance