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FEBS Lett. 2001 Nov 2;507(3):241-6.

Differential subcellular localization of hZip1 in adherent and non-adherent cells.

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INSERM U409 and IFR Claude Bernard, Faculté Xavier Bichat, P.O. Box 416, 16 Rue Henri Huchard, 75018 Cedex 18, Paris, France.


Two human divalent cation transporters of the ZIP family, hZip1 and hZip2, homologous to Irt1 (Arabidopsis thaliana), the first identified member, have been described. They were shown by transfection into K562 cells to be localized at the plasma membrane and to mediate zinc uptake. Here we report a differential subcellular localization of hZip1 according to cell type. By transient expressions of EGFP-hZip1, FLAG-tagged or native hZip1, we observed that hZip1 has a vesicular localization in COS-7 cells or in several epithelial cell lines, corresponding partially to the endoplasmic reticulum. Using anti-hZip1 antibodies, we confirmed the intracellular localization of the endogenous protein in PC-3, a prostate cancer cell line.

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