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Structure, function, and evolution of ferritins.

S C Andrews1, P Arosio, W Bottke

  • 1Department of Molecular Biology and Biotechnology, University of Sheffield, United Kingdom.

Journal of Inorganic Biochemistry
|August 15, 1992
PubMed
Summary
This summary is machine-generated.

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Animal, plant, and bacterial ferritins share iron-storage roles. Plant ferritins and bacterioferritins (BFRs) likely evolved from a common H-type ancestor, differing from mammalian L-type ferritins.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Structural Biology

Background:

  • Ferritins and bacterioferritins (BFRs) are iron-storage proteins found across diverse organisms, including animals, plants, and bacteria.
  • Despite a shared function, variations exist in their cellular location and regulation.
  • Mammalian ferritins comprise H (heavy) and L (light) chains with distinct structural and functional properties.

Purpose of the Study:

  • To investigate the evolutionary relationships and structural similarities among different types of ferritins and BFRs.
  • To understand the functional roles and structural basis of iron storage in various organisms.
  • To explore the significance of the ferroxidase center in ferritin evolution and function.

Main Methods:

  • Comparative analysis of primary structures and conservation of ferroxidase center residues.

Related Experiment Videos

  • Three-dimensional structure comparisons of mammalian and invertebrate ferritins.
  • Computer modeling of plant ferritins and BFRs.
  • Characterization of ferritin homopolymer variants to identify iron uptake residues.

    • Main Results:

    • Plant ferritins and BFRs exhibit greater similarity to mammalian H-chain ferritins than L-chain ferritins, suggesting a common H-type ancestor.
    • A conserved molecular framework is evident across mammalian, invertebrate, and modeled plant ferritins and BFRs.
    • Specific residues involved in iron uptake and functional differences between mammalian H and L chains were identified.

    Conclusions:

    • Ferritin evolution likely involved a common H-type ancestor, with L-type ferritins representing a distinct lineage.
    • The conserved structural framework supports the fundamental iron-storage function across different ferritin types.
    • Understanding ferritin variants provides insights into iron homeostasis mechanisms and potential therapeutic targets.