Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 31.97 kDa 
• Atom Count: 2230 
• Residue Count: 308 
• Unique protein chains: 1

1SPD

AMYOTROPHIC LATERAL SCLEROSIS AND STRUCTURAL DEFECTS IN CU,ZN SUPEROXIDE DISMUTASE

• DOI: 10.2210/pdb1SPD/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1993-07-21 Released: 1994-04-30 
• Deposition Author(s): Parge, H.E., Tainer, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 0.224 
• R-Value Observed: 0.224 

Literature

Amyotrophic lateral sclerosis and structural defects in Cu,Zn superoxide dismutase.

Deng, H.X., Hentati, A., Tainer, J.A., Iqbal, Z., Cayabyab, A., Hung, W.Y., Getzoff, E.D., Hu, P., Herzfeldt, B., Roos, R.P., Warner, C., Deng, G., Soriano, E., Smyth, C., Parge, H.E., Ahmed, A., Roses, A.D., Hallewell, R.A., Pericak-Vance, M.A., Siddique, T.

(1993) Science 261: 1047-1051

• PubMed: 8351519 
• DOI: 10.1126/science.8351519
• Primary Citation of Related Structures:  
  1SPD


• PubMed Abstract: 
  

Single-site mutants in the Cu,Zn superoxide dismutase (SOD) gene (SOD1) occur in patients with the fatal neurodegenerative disorder familial amyotrophic lateral sclerosis (FALS). Complete screening of the SOD1 coding region revealed that the mutation Ala4 to Val in exon 1 was the most frequent one; mutations were identified in exons 2, 4, and 5 but not in the active site region formed by exon 3. The 2.4 A crystal structure of human SOD, along with two other SOD structures, established that all 12 observed FALS mutant sites alter conserved interactions critical to the beta-barrel fold and dimer contact, rather than catalysis. Red cells from heterozygotes had less than 50 percent normal SOD activity, consistent with a structurally defective SOD dimer. Thus, defective SOD is linked to motor neuron death and carries implications for understanding and possible treatment of FALS.

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Organizational Affiliation: 

Department of Neurology, Northwestern University Medical School, Chicago, IL 60611.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SUPEROXIDE DISMUTASE	A, B	154	Homo sapiens	Mutation(s): 0  Gene Names: SOD1 EC: 1.15.1.1
Find proteins for P00441 (Homo sapiens) Explore P00441  Go to UniProtKB:  P00441
NIH Common Fund Data Resources
PHAROS:  P00441 GTEx:  ENSG00000142168

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	A, B	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CU	A, B	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 0.224 
• R-Value Observed: 0.224 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 113.57	α = 90
b = 113.57	β = 90
c = 71.55	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
PROLSQ	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-07-21 
• Released Date: 1994-04-30 
Deposition Author(s): Parge, H.E., Tainer, J.A.

Revision History 

• Version 1.0: 1994-04-30
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2012-02-29
  Changes: Database references
• Version 1.4: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.5: 2019-07-17
  Changes: Data collection, Derived calculations, Refinement description
• Version 1.6: 2019-08-14
  Changes: Data collection, Refinement description