Endogenous Copper Transport System

The endogenous copper transport system consists of a network of membrane transporters, plasma carriers, and intracellular chaperones responsible for the import, export, intracellular distribution, and utilization of copper ions. The key plasma membrane transporter, CTR1, mediates high-affinity copper uptake into cells. ATP7A and ATP7B are P-type ATPases that regulate copper efflux and delivery to copper-dependent enzymes in secretory pathways, while chaperones such as COX17, SCO1, and SCO2 deliver copper for mitochondrial oxidative phosphorylation. Plasma proteins including ceruloplasmin, albumin, and transcuprein facilitate inter-organ transport of copper. Dysregulation of this system leads to diseases such as Wilson’s disease (copper overload), Menkes disease (copper deficiency), and impacts neurological, hepatic, and cardiovascular health. The label "Endogenous Copper Transport System" is not a singular canonical molecule or therapeutic target, but refers to a multifactorial, tightly regulated network crucial for cellular and systemic copper balance.

Other names

Copper transporter 1 (CTR1)SLC31A1Copper-transporting ATPase 1 (ATP7A)Copper-transporting ATPase 2 (ATP7B)COX17CeruloplasminTranscupreinAlbumin

Inhibition or modulation of copper uptake (blockade or enhancement of CTR1 function); Chelation and removal of excess copper (by chelators); Disruption of copper-dependent enzymes (by targeting ATPases or chaperones)