Biological Assembly 1  

 3D View: Structure | Electron Density | 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: 31.95 kDa 
• Atom Count: 2450 
• Residue Count: 306 
• Unique protein chains: 1

1PTZ

Crystal structure of the human CU, Zn Superoxide Dismutase, Familial Amyotrophic Lateral Sclerosis (FALS) Mutant H43R

• DOI: 10.2210/pdb1PTZ/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2003-06-23 Released: 2003-09-09 
• Deposition Author(s): DiDonato, M., Craig, L., Huff, M.E., Thayer, M.M., Cardoso, R.M.F., Kassmann, C.J., Lo, T.P., Bruns, C.K., Powers, E.T., Kelly, J.W., Getzoff, E.D., Tainer, J.A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.215 
• R-Value Work: 0.186 
• R-Value Observed: 0.186 

Literature

ALS Mutants of Human Superoxide Dismutase Form Fibrous Aggregates Via Framework Destabilization

DiDonato, M., Craig, L., Huff, M.E., Thayer, M.M., Cardoso, R.M.F., Kassmann, C.J., Lo, T.P., Bruns, C.K., Powers, E.T., Kelly, J.W., Getzoff, E.D., Tainer, J.A.

(2003) J Mol Biol 332: 601-615

• PubMed: 12963370 
• DOI: 10.1016/s0022-2836(03)00889-1
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Many point mutations in human Cu,Zn superoxide dismutase (SOD) cause familial amyotrophic lateral sclerosis (FALS), a fatal neurodegenerative disorder in heterozygotes. Here we show that these mutations cluster in protein regions influencing architectural integrity. Furthermore, crystal structures of SOD wild-type and FALS mutant H43R proteins uncover resulting local framework defects. Characterizations of beta-barrel (H43R) and dimer interface (A4V) FALS mutants reveal reduced stability and drastically increased aggregation propensity. Moreover, electron and atomic force microscopy indicate that these defects promote the formation of filamentous aggregates. The filaments resemble those seen in neurons of FALS patients and bind both Congo red and thioflavin T, suggesting the presence of amyloid-like, stacked beta-sheet interactions. These results support free-cysteine-independent aggregation of FALS mutant SOD as an integral part of FALS pathology. They furthermore provide a molecular basis for the single FALS disease phenotype resulting from mutations of diverse side-chains throughout the protein: many FALS mutations reduce structural integrity, lowering the energy barrier for fibrous aggregation.

---

Organizational Affiliation: 

Department of Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, Maildrop MB4, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Superoxide dismutase [Cu-Zn]	A, B	153	Homo sapiens	Mutation(s): 3  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 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ZN	A, B	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CU1	A, B	COPPER (I) ION Cu VMQMZMRVKUZKQL-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.215 
• R-Value Work: 0.186 
• R-Value Observed: 0.186 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 111.199	α = 90
b = 47.525	β = 97.99
c = 56.041	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-23 
• Released Date: 2003-09-09 
Deposition Author(s): DiDonato, M., Craig, L., Huff, M.E., Thayer, M.M., Cardoso, R.M.F., Kassmann, C.J., Lo, T.P., Bruns, C.K., Powers, E.T., Kelly, J.W., Getzoff, E.D., Tainer, J.A.

Revision History 

• Version 1.0: 2003-09-09
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance