3AJQ

Crystal structure of human H ferritin E140Q mutant

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.175 

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This is version 1.1 of the entry. See complete history. 


Literature

The universal mechanism for iron translocation to the ferroxidase site in ferritin, which is mediated by the well conserved transit site

Masuda, T., Goto, F., Yoshihara, T., Mikami, B.

(2010) Biochem Biophys Res Commun 400: 94-99

  • DOI: 10.1016/j.bbrc.2010.08.017
  • Primary Citation of Related Structures:  
    3AJO, 3AJP, 3AJQ

  • PubMed Abstract: 

    • Ferritins are ubiquitous iron storage proteins. Recently, we identified a novel metal-binding site, transit site, in the crystal structure of phytoferritin. To elucidate the function of the transit site in ferritin from other species, we prepared transit-site-deficient mutants of human H ferritin, E140A and E140Q, and their iron oxidation kinetics was analyzed ...

    Ferritins are ubiquitous iron storage proteins. Recently, we identified a novel metal-binding site, transit site, in the crystal structure of phytoferritin. To elucidate the function of the transit site in ferritin from other species, we prepared transit-site-deficient mutants of human H ferritin, E140A and E140Q, and their iron oxidation kinetics was analyzed. The initial velocities of iron oxidization were reduced in the variants, especially in E140Q. The crystal structure of E140Q showed that the side chain of the mutated Gln140 was fixed by a hydrogen bond, whereas that of native Glu140 was flexible. These results suggest that the conserved transit site also has a function to assist with the metal ion sequestration to the ferroxidase site in ferritins from vertebrates.

    Organizational Affiliation: 

    Laboratory of Food Quality Design and Development, Division of Agronomy and Horticultural Science, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan. masutaro@kais.kyoto-u.ac.jp



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ferritin heavy chainA182Homo sapiensMutation(s): 1 
Gene Names: FTH1, FTH, FTHL6, OK/SW-cl.84, PIG15
EC: 1.16.3.1
UniProt & NIH Common Fund Data Resources
Find proteins for P02794 (Homo sapiens)
Explore P02794 
Go to UniProtKB:  P02794
PHAROS:  P02794
GTEx:  ENSG00000167996 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02794
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.175 
  • Space Group: F 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 182.354α = 90
b = 182.354β = 90
c = 182.354γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
CNSrefinement
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2010-06-11 
  • Released Date: 2010-08-25 
    • Deposition Author(s): Masuda, T., Mikami, B.

Revision History  (Full details and data files)

  • Version 1.0: 2010-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance