Copper and zinc ion homeostasis and associated metalloproteins

Copper and zinc ion homeostasis refers to the complex regulatory network of proteins responsible for maintaining optimal cellular and systemic levels of these essential trace metals (Kaler, 2011, Nature Reviews Neurology). Copper is a critical cofactor for enzymes like cytochrome c oxidase and superoxide dismutase, but its redox activity can lead to oxidative stress if not strictly sequestered by chaperones and transporters like ATP7A and ATP7B (Lutsenko, 2010, Chemical Reviews). Zinc serves structural and catalytic roles in thousands of proteins, including zinc-finger transcription factors, and is regulated by the ZIP (SLC39A) and ZnT (SLC30A) transporter families (Kambe et al., 2015, Physiological Reviews). Dysregulation of these systems leads to severe disorders such as Wilson's disease (copper overload), Menkes disease (copper deficiency), and various neurodegenerative conditions like Amyotrophic Lateral Sclerosis (ALS) and Alzheimer's disease (Gaier et al., 2013, Human Mutation). Therapeutic interventions typically involve chelating agents like penicillamine to remove excess metal or supplementation/ionophores to correct deficiencies or redistribute ions (Roberts & Schilsky, 2008, Hepatology).

Other names

Metal ion homeostasisCopper and zinc metabolismMetalloprotein regulationTrace metal homeostasis

Chelation of excess metal ions, competitive inhibition of intestinal absorption via metallothionein induction, and ionophore-mediated redistribution of metals (Brewer, 2001, Chemical Reviews; Kaler, 2011, Nature Reviews Neurology).