A novel mammalian iron-regulated protein involved in intracellular iron metabolism

Sherry Abboud, David J. Haile

Research output: Contribution to journalArticlepeer-review

1032 Scopus citations


We have isolated and characterized a novel iron-regulated gene that is homologous to the divalent metal transporter 1 family of metal transporters. This gene, termed metal transporter protein (mtp1), is expressed in tissues involved in body iron homeostasis including the developing and mature reticuloendothelial system, the duodenum, and the pregnant uterus. MTP1 is also expressed in muscle and central nervous system cells in the embryo. At the subcellular level, MTP1 is localized to the basolateral membrane of the duodenal epithelial cell and a cytoplasmic compartment of reticuloendothelial system cells. Overexpression of MTP1 in tissue culture cells results in intracellular iron depletion. In the adult mouse, MTP1 expression in the liver and duodenum are reciprocally regulated. Iron deficiency induces MTP1 expression in the duodenum but down-regulates expression in the liver. These data indicate that MTP1 is an iron-regulated membrane-spanning protein that is involved in intracellular iron metabolism.

Original languageEnglish (US)
Pages (from-to)19906-19912
Number of pages7
JournalJournal of Biological Chemistry
Issue number26
StatePublished - Jun 30 2000

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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