Magnesium channel

Magnesium channels are membrane proteins that mediate the selective transport of magnesium ions (Mg²⁺) across cellular membranes, playing a key role in maintaining cellular magnesium homeostasis. Structurally, known magnesium channels such as MgtE (homodimer with cytoplasmic and transmembrane domains, multiple Mg²⁺ binding sites) and TRPM6/7 (with channel and kinase domains) use distinct mechanisms for ion selectivity and gating. These channels are essential for biological functions including enzyme regulation, energy metabolism, and genomic stability. Dysfunction, mutation, or improper regulation of magnesium channels leads to a wide spectrum of diseases in humans, highlighting their clinical and therapeutic importance.

Other names

Mg²⁺ channelMagnesium transporterMgtECorATRPM7TRPM6Mrs2

Facilitated diffusion of Mg²⁺ ions across membranes. Channel gating is regulated by intracellular magnesium and ATP levels (for example, MgtE’s gating depends on intracellular Mg²⁺ and ATP). Kinase activity (TRPM7 and TRPM6 are fused to a kinase domain for intracellular signaling modulation).