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Entry Detail
PDB ID:
4REU
Keywords:
OXIDOREDUCTASE
Title:
Revelation of Endogenously bound Fe2+ ions in the Crystal Structure of Ferritin from Escherichia coli
Biological Source:
Source Organism:
Escherichia coli str. K-12 substr. MDS42
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2014-09-24
Release Date:
2014-10-22
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.23
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
I 4
4REU validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Ferritin
Chain IDs:A, B, C, D, E, F
Chain Length:164
Number of Molecules:6
Biological Source:Escherichia coli str. K-12 substr. MDS42
Ligand Molecules
CL
FE
HG
MES
MG
SO4
Primary Citation
Revelation of endogenously bound Fe(2+) ions in the crystal structure of ferritin from Escherichia coli.
Biochem.Biophys.Res.Commun. 453 636 641 (2014)
PMID: 25305494 DOI: 10.1016/j.bbrc.2014.10.007

Abstact

Ferritin is an iron regulatory protein. It is responsible for storage and detoxification of excess iron thereby it regulates iron level in the body. Here we report the crystal structure of ferritin with two endogenously expressed Fe atoms binding in both the sites. The protein was purified and characterized by MALDI-TOF and N-terminal amino acid sequencing. The crystal belongs to I4 space group and it diffracted up to 2.5Å. The structural analysis suggested that it crystallizes as hexamer and confirmed that it happened to be the first report of endogenously expressed Fe ions incorporated in both the A and B sites, situated in between the helices.

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