Journal
PROTEOMICS
Volume 14, Issue 11, Pages 1343-1356Publisher
WILEY
DOI: 10.1002/pmic.201300496
Keywords
Cell biology; Ferritin; Glutathione; Low-density lipoprotein receptor; Transcription factors; Zn transfer
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Metallothionein (MT) is a protein involved in numerous key processes, and the most important include zinc ion homeostasis, detoxification of heavy metals, and protection against oxidative stress. MT by interaction with other proteins fulfills its function, resulting in different effects in the body. Interaction of MT with ferritin, which causes a redox reaction, resulting in the reduction of Fe3+ stored in ferritin and a release of harmful Fe2+, was observed. Referring to the redox function of MT, it has been shown that the pair of GSH/GSSG modulates transfer of Zn between MT and Zn-binding proteins. Furthermore, it was shown that GSSG, in the presence of GSH, interacts directly with MT. Apothionein-MT can retrieve Zn from the transcription factors or Zn-containing enzymes. Apothionein-MT by taking Zn can deactivate metal-dependent enzymes while Zn-MT has the opposite effect. As the effect of MT interaction with low-density lipoprotein receptorsmegalin and lipoprotein receptor related protein 1, the uptake of Cd-MT occurs and results in the disruption of many functions of proximal tubules. MT is involved in numerous processes and many of them are regulated by protein-protein interactions. Possibly in the future MT will become a therapeutic agent, which will result in a breakthrough in the field of pharmacy and medicine.
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