Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.37 kDa 
• Atom Count: 863 
• Modelled Residue Count: 106 
• Deposited Residue Count: 108 
• Unique protein chains: 1

1SOY

Solution structure of the bacterial frataxin orthologue, CyaY

• PDB DOI: 10.2210/pdb1SOY/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-03-16 Released: 2004-11-23 
• Deposition Author(s): Nair, M., Adinolfi, S., Pastore, C., Kelly, G., Temussi, P., Pastore, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 250 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

Literature

Solution Structure of the Bacterial Frataxin Ortholog, CyaY; Mapping the Iron Binding Sites

Nair, M., Adinolfi, S., Pastore, C., Kelly, G., Temussi, P., Pastore, A.

(2004) Structure 12: 2037-2048

• PubMed: 15530368 
• DOI: 10.1016/j.str.2004.08.012
• Primary Citation of Related Structures:  
  1SOY


• PubMed Abstract: 
  

CyaY is the bacterial ortholog of frataxin, a small mitochondrial iron binding protein thought to be involved in iron sulphur cluster formation. Loss of frataxin function leads to the neurodegenerative disorder Friedreich's ataxia. We have solved the solution structure of CyaY and used the structural information to map iron binding onto the protein surface. Comparison of the behavior of wild-type CyaY with that of a mutant indicates that specific binding with a defined stoichiometry does not require aggregation and that the main binding site, which hosts both Fe(2+) and Fe(3+), occupies a highly anionic surface of the molecule. This function is conserved across species since the corresponding region of human frataxin is also able to bind iron, albeit with weaker affinity. The presence of secondary binding sites on CyaY, but not on frataxin, hints at a possible polymerization mechanism. We suggest mutations that may provide further insights into the frataxin function.

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Organizational Affiliation: 

Division of Molecular Structure, The Ridgeway, London, NW7 1AA, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CyaY protein	A	108	Escherichia coli	Mutation(s): 0  Gene Names: cyaY, b3807
UniProt
Find proteins for P27838 (Escherichia coli (strain K12)) Explore P27838  Go to UniProtKB:  P27838

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 250 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
• OLDERADO: 1SOY Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-03-16 
• Released Date: 2004-11-23 
Deposition Author(s): Nair, M., Adinolfi, S., Pastore, C., Kelly, G., Temussi, P., Pastore, A.

Revision History  

• Version 1.0: 2004-11-23
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Data collection, Database references, Derived calculations