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The iron transporter DMT1.

N C Andrews1

  • 1Howard Hughes Medical Institute, Boston, MA, USA. andrews_n@al.tch.harvard.edu

The International Journal of Biochemistry & Cell Biology
|December 3, 1999
PubMed
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Divalent metal transporter 1 (DMT1) is a key protein for iron absorption. Research identified DMT1 mutations causing iron deficiency and highlighted its role in intestinal iron transport.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Physiology

Background:

  • Divalent metal transporter 1 (DMT1) is the first identified mammalian transmembrane iron transporter.
  • Its function was independently confirmed by two research groups in 1997.
  • DMT1 was previously known as Nramp2 and DCT1.

Purpose of the Study:

  • To elucidate the role of DMT1 in mammalian iron transport.
  • To characterize the function of DMT1 in intestinal iron absorption and red blood cell utilization.
  • To explore DMT1 as a potential therapeutic target for iron overload disorders.

Main Methods:

  • Genetic studies in mice and rats with identified mutations in DMT1.
  • Expression cloning of DMT1 using Xenopus oocytes to identify iron-stimulating mRNAs.

Related Experiment Videos

  • Analysis of DMT1's role in iron transfer across intestinal cells and endosomes.

    • Main Results:

    • Mutations in DMT1 were linked to defects in intestinal iron absorption and red blood cell iron utilization in animal models.
    • Expression cloning successfully isolated DMT1, confirming its function as a proton-coupled metal-ion transporter.
    • DMT1 facilitates iron transport across the apical surface of intestinal cells and from endosomes.

    Conclusions:

    • DMT1 is a crucial protein for mammalian iron homeostasis.
    • Understanding DMT1's mechanism is vital for addressing iron absorption and utilization disorders.
    • Human DMT1 presents a potential target for pharmacological interventions in iron overload conditions.