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Cloning and Characterization of a Novel Mammalian Zinc Transporter, Zinc Transporter 5, Abundantly Expressed in Pancreatic β Cells
Open accessAbstract
Intracellular homeostasis for zinc is achieved through the coordinate regulation of specific transporters engaged in zinc influx, efflux, and intracellular compartmentalization. We have identified a novel mammalian zinc transporter, zinc transporter 5 (ZnT-5), by virtue of its similarity to ZRC1, a zinc transporter of Saccharomyces cerevisiae, a member of the cation diffusion facilitator family. Human ZnT-5 (hZnT-5) cDNA encodes a 765-amino acid protein with 15 predicted membrane-spanning domains. hZnT-5 was ubiquitously expressed in all tested human tissues and abundantly expressed in the pancreas. In the human pancreas, hZnT-5 was expressed abundantly in insulin-containing beta cells that contain zinc at the highest level in the body. The hZnT-5 immunoreactivity was found to be associated with secretory granules by electron microscopy. The hZnT-5-derived zinc transport activity was detected using the Golgi-enriched vesicles prepared from hZnT-5-induced HeLa/hZnT-5 cells in which exogenous hZnT-5 expression is inducible by the Tet-on gene regulation system. This activity was dependent on time, temperature, and concentration and was saturable. Moreover, zinc at a high concentration (10 mm) inhibited the growth of yeast expressing hZnT-5. These results suggest that ZnT-5 plays an important role for transporting zinc into secretory granules in pancreatic beta cells.
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Cites
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Cited by
Kambe, T., Tsuji, T., Hashimoto, A., & Itsumura, N. (2015) · Physiological Reviews · doi:10.1152/physrev.00035.2014 · Cited by 1,158
Self-citationThe cation efflux transporter ZnT8 (Slc30A8) is a major autoantigen in human type 1 diabetes
Wenzlau, J. M., Juhl, K., Yu, L., Moua, O., Sarkar, S. A., Gottlieb, P., Rewers, M., Eisenbarth, G. S., Jensen, J., Davidson, H. W., et al. (2007) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0705894104 · Cited by 1,014
Zinc transporters and the cellular trafficking of zinc
Eide, D. J. (2006) · Biochimica et Biophysica Acta (BBA) - Molecular Cell Research · doi:10.1016/j.bbamcr.2006.03.005 · Cited by 874
Zinc and its role in immunity and inflammation
Bonaventura, P., Benedetti, G., Albarède, F., & Miossec, P. (2015) · Autoimmunity Reviews · doi:10.1016/j.autrev.2014.11.008 · Cited by 798
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Metadata
- Authors
- Kambe, T., Narita, H., Yamaguchi-Iwai, Y., Hirose, J., Amano, T., Sugiura, N., Sasaki, R., Mori, K., Iwanaga, T., & Nagao, M.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2002-05
- Volume
- 277
- Issue
- 21
- Pages
- 19049-19055
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1561410732
- Cited by
- 254
- References
- 3
- FWCI
- 15.83
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Kambe, T., Narita, H., Yamaguchi-Iwai, Y., Hirose, J., Amano, T., Sugiura, N., Sasaki, R., Mori, K., Iwanaga, T., & Nagao, M. (2002). Cloning and Characterization of a Novel Mammalian Zinc Transporter, Zinc Transporter 5, Abundantly Expressed in Pancreatic β Cells. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m200910200
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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