3F7K

X-ray Crystal Structure of an Alvinella pompejana Cu,Zn Superoxide Dismutase- Hydrogen Peroxide Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Superoxide Dismutase from the Eukaryotic Thermophile Alvinella pompejana: Structures, Stability, Mechanism, and Insights into Amyotrophic Lateral Sclerosis.

Shin, D.S.Didonato, M.Barondeau, D.P.Hura, G.L.Hitomi, C.Berglund, J.A.Getzoff, E.D.Cary, S.C.Tainer, J.A.

(2009) J.Mol.Biol. 385: 1534-1555

  • DOI: 10.1016/j.jmb.2008.11.031
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Prokaryotic thermophiles supply stable human protein homologs for structural biology; yet, eukaryotic thermophiles would provide more similar macromolecules plus those missing in microbes. Alvinella pompejana is a deep-sea hydrothermal-vent worm that ...

    Prokaryotic thermophiles supply stable human protein homologs for structural biology; yet, eukaryotic thermophiles would provide more similar macromolecules plus those missing in microbes. Alvinella pompejana is a deep-sea hydrothermal-vent worm that has been found in temperatures averaging as high as 68 degrees C, with spikes up to 84 degrees C. Here, we used Cu,Zn superoxide dismutase (SOD) to test if this eukaryotic thermophile can provide insights into macromolecular mechanisms and stability by supplying better stable mammalian homologs for structural biology and other biophysical characterizations than those from prokaryotic thermophiles. Identification, cloning, characterization, X-ray scattering (small-angle X-ray scattering, SAXS), and crystal structure determinations show that A. pompejana SOD (ApSOD) is superstable, homologous, and informative. SAXS solution analyses identify the human-like ApSOD dimer. The crystal structure shows the active site at 0.99 A resolution plus anchoring interaction motifs in loops and termini accounting for enhanced stability of ApSOD versus human SOD. Such stabilizing features may reduce movements that promote inappropriate intermolecular interactions, such as amyloid-like filaments found in SOD mutants causing the neurodegenerative disease familial amyotrophic lateral sclerosis or Lou Gehrig's disease. ApSOD further provides the structure of a long-sought SOD product complex at 1.35 A resolution, suggesting a unified inner-sphere mechanism for catalysis involving metal ion movement. Notably, this proposed mechanism resolves apparent paradoxes regarding electron transfer. These results extend knowledge of SOD stability and catalysis and suggest that the eukaryote A. pompejana provides macromolecules highly similar to those from humans, but with enhanced stability more suitable for scientific and medical applications.


    Organizational Affiliation

    Department of Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Copper,Zinc Superoxide Dismutase
A
152Alvinella pompejanaMutation(s): 0 
Gene Names: SOD1
EC: 1.15.1.1
Find proteins for B6CHW7 (Alvinella pompejana)
Go to Gene View: SOD1
Go to UniProtKB:  B6CHW7
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CU1
Query on CU1

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A
COPPER (I) ION
Cu
VMQMZMRVKUZKQL-UHFFFAOYSA-N
 Ligand Interaction
PEO
Query on PEO

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A
HYDROGEN PEROXIDE
H2 O2
MHAJPDPJQMAIIY-UHFFFAOYSA-N
 Ligand Interaction
CU
Query on CU

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A
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.176 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 62.563α = 90.00
b = 62.563β = 90.00
c = 163.745γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction
SHELXL-97refinement
XFITdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance