Macromolecule Content

• Total Structure Weight: 15832.45 
• Atom Count: 1111 
• Residue Count: 153 
• Unique protein chains: 1

1RK7

Solution structure of apo Cu,Zn Superoxide Dismutase: role of metal ions in protein folding

• DOI: 10.2210/pdb1RK7/pdb
• BMRB: 4202

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 5 


• Deposited: 2003-11-21 Released: 2003-12-02 
• Deposition Author(s): Banci, L., Bertini, I., Cramaro, F., Del Conte, R., Viezzoli, M.S.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 400 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy,target function 

Literature

Solution structure of Apo Cu,Zn Superoxide Dismutase: Role of Metal Ions in Protein Folding

Bertini, I., Cramaro, F., Del Conte, R., Viezzoli, M.S., Banci, L.

(2003) Biochemistry 42: 9543-9553

• PubMed: 12911296 
• DOI: 10.1021/bi034324m


• PubMed Abstract: 
  

The solution structure of the demetalated copper, zinc superoxide dismutase is obtained for the monomeric Glu133Gln/Phe50Glu/Gly51Glu mutant through NMR spectroscopy. The demetalated protein still has a well-defined tertiary structure; however, two beta-strands containing two copper ligands (His46 and His48, beta4) and one zinc ligand (Asp83, beta5) are shortened, and the sheet formed by these strands and strands beta7 and beta8 moves away from the other strands of the beta-barrel to form an open clam with respect to a closed conformation in the holoprotein. Furthermore, loop IV which contains three zinc ligands (His63, His71, and His80) and loop VII which contributes to the definition of the active cavity channel are severely disordered, and experience extensive mobility as it results from thorough (15)N relaxation measurements. These structural and mobility data, if compared with those of the copper-depleted protein and holoprotein, point out the role of each metal ion in the protein folding, leading to the final tertiary structure of the holoprotein, and provide hints for the mechanisms of metal delivery by metal chaperones.

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Organizational Affiliation: 

Department of Chemistry and Centro Risonanze Magnetiche, University of Florence, Via Luigi Sacconi 6, 50019 Sesto Fiorentino, Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Superoxide dismutase [Cu-Zn]	A	153	Homo sapiens	Mutations: E133Q, F50E, C6A, C111S, G51E Gene Names: SOD1 EC: 1.15.1.1
Find proteins for P00441 (Homo sapiens) Go to Gene View: SOD1 Go to UniProtKB:  P00441

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 400 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy,target function 
• Olderado: 1RK7 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-11-21 
• Released Date: 2003-12-02 
• Deposition Author(s): Banci, L., Bertini, I., Cramaro, F., Del Conte, R., Viezzoli, M.S.

Revision History 

• Version 1.0: 2003-12-02
  Type: Initial release
• Version 1.1: 2008-04-29
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance