Biological Assembly 1  

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

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.24 kDa 
• Atom Count: 985 
• Modelled Residue Count: 106 
• Deposited Residue Count: 106 
• Unique protein chains: 1

1EW4

CRYSTAL STRUCTURE OF ESCHERICHIA COLI CYAY PROTEIN REVEALS A NOVEL FOLD FOR THE FRATAXIN FAMILY

• PDB DOI: 10.2210/pdb1EW4/pdb

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


• Deposited: 2000-04-22 Released: 2000-08-09 
• Deposition Author(s): Suh, S.W., Cho, S., Lee, M.G., Yang, J.K., Lee, J.Y., Song, H.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.213 
• R-Value Work: 0.188 
• R-Value Observed: 0.188 

Literature

Crystal structure of Escherichia coli CyaY protein reveals a previously unidentified fold for the evolutionarily conserved frataxin family.

Cho, S.J., Lee, M.G., Yang, J.K., Lee, J.Y., Song, H.K., Suh, S.W.

(2000) Proc Natl Acad Sci U S A 97: 8932-8937

• PubMed: 10908679 
• DOI: 10.1073/pnas.160270897
• Primary Citation of Related Structures:  
  1EW4


• PubMed Abstract: 
  

Friedreich ataxia is an autosomal recessive neurodegenerative disease caused by defects in the FRDA gene, which encodes a mitochondrial protein called frataxin. Frataxin is evolutionarily conserved, with homologs identified in mammals, worms, yeast, and bacteria. The CyaY proteins of gamma-purple bacteria are believed to be closely related to the ancestor of frataxin. In this study, we have determined the crystal structure of the CyaY protein from Escherichia coli at 1.4-A resolution. It reveals a protein fold consisting of a six-stranded antiparallel beta-sheet flanked on one side by two alpha-helices. This fold is likely to be shared by all members of the conserved frataxin family. This study also provides a framework for the interpretation of disease-associated mutations in frataxin and for understanding the possible functions of this protein family.

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Organizational Affiliation: 

Department of Chemistry, Seoul National University, Seoul 151-742, Korea.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYAY PROTEIN	A	106	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P27838 (Escherichia coli (strain K12)) Explore P27838  Go to UniProtKB:  P27838

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.213 
• R-Value Work: 0.188 
• R-Value Observed: 0.188 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.178	α = 90
b = 44.178	β = 90
c = 98.286	γ = 120

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-04-22 
• Released Date: 2000-08-09 
Deposition Author(s): Suh, S.W., Cho, S., Lee, M.G., Yang, J.K., Lee, J.Y., Song, H.K.

Revision History  

• Version 1.0: 2000-08-09
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance