Magnesium-dependent enzymes and structural complexes

Magnesium-dependent enzymes and structural complexes represent a vast and diverse group of biological entities that require divalent magnesium cations (Mg2+) for their catalytic activity or structural integrity. Magnesium acts as a critical cofactor for over 300 enzymatic reactions, particularly those involving the transfer of phosphate groups, such as kinases, phosphatases, and ATPases, where it typically coordinates with ATP to form a bioactive Mg-ATP complex [1][2]. Beyond catalysis, Mg2+ ions are essential for stabilizing the tertiary structures of nucleic acids and large macromolecular assemblies, including ribosomes and chromatin [3]. In a clinical context, while this category is too broad to be a single drug target, specific members are targeted by various therapies; for instance, HIV integrase inhibitors function by chelating Mg2+ ions in the viral enzyme's active site [4]. Dysregulation of magnesium homeostasis is linked to numerous pathological conditions, including cardiovascular disease, type 2 diabetes, and neurological disorders, making the maintenance of these complexes vital for human health [1][2]. Consequently, pharmacological intervention often involves either direct magnesium supplementation or the use of small molecules that exploit the magnesium-binding sites of specific enzymes [4]. References: [1] Al Alawi AM, et al. (2018) Int J Endocrinol. [2] NIH Office of Dietary Supplements: Magnesium Fact Sheet. [3] Klein DJ, et al. (2004) RNA. [4] Hare S, et al. (2010) Nature.

Other names

Mg2+-dependent proteinsMagnesium-dependent enzymesMagnesium-dependent structural complexesMagnesium-requiring enzymes

Magnesium ions serve as essential cofactors for catalytic activity; drugs may act as ionic supplements to restore physiological levels or as chelators that bind Mg2+ in enzyme active sites to inhibit function [1][4].