An overview of a wide range of functions of ZnT and Zip zinc transporters in the secretory pathway - PubMed (original) (raw)
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doi: 10.1271/bbb.110056. Epub 2011 Jun 13.
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- PMID: 21670538
- DOI: 10.1271/bbb.110056
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Review
An overview of a wide range of functions of ZnT and Zip zinc transporters in the secretory pathway
Taiho Kambe. Biosci Biotechnol Biochem. 2011.
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Abstract
Zinc plays essential roles in the early secretory pathway for a number of secretory, membrane-bound, and endosome/lysosome-resident enzymes. It enables the enzymes to fold properly and become functional, by binding as a structural or catalytic component. Moreover, zinc secreted from the secretory vesicles/granules into the extracellular space has a pivotal role as a signaling molecule for various physiological functions. Zinc transporters of the Slc30a/ZnT and Slc39a/Zip families play crucial roles in these functions, mediating zinc influx to and efflux from the lumen of the secretory pathway, constitutively or in a cell-specific manner. This paper reviews current knowledge of the ways these two zinc transporters perform these tasks by manipulating zinc homeostasis in the secretory pathway. Recent questions concerning zinc released into the cytoplasm from the secretory pathway, which then functions as an intracellular signaling molecule, are also briefly reviewed, emphasizing zinc transporter functions.
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