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

Authors:
S Abboud D J Haile

J Biol Chem 2000 Jun;275(26):19906-12

Department of Pathology and the Department of Medicine, University of Texas Health Science Center, San Antonio, Texas 78229, USA.

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.

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http://www.jbc.org/lookup/doi/10.1074/jbc.M000713200
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http://dx.doi.org/10.1074/jbc.M000713200DOI Listing
June 2000
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(Supplied by CrossRef)

Haile et al.
Am. J. Med. Sci. 1999

Gunshin et al.
Nature 1997

Canonne-Hergaux et al.
Blood 1999

Umbreit et al.
Semin. Hematol. 1998

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