Magnesium-dependent ATP-dependent enzymes (Mg-ATPases)

ATP-dependent enzymes constitute a diverse superfamily of proteins, including kinases, ATPases, and helicases, that require magnesium (Mg2+) as an essential cofactor for catalytic activity (Source: UniProt). The Mg2+ ion typically coordinates with the oxygen atoms of the ATP phosphate groups, facilitating the orientation of the gamma-phosphate for transfer or hydrolysis by neutralizing negative charge densities (Source: PubMed, PMID: 15590603). This magnesium-coordinated ATP complex is the functional substrate for thousands of cellular processes, ranging from signal transduction and muscle contraction to DNA replication and active ion transport (Source: NIH). In clinical medicine, this site is the primary target for ATP-competitive inhibitors, such as the tyrosine kinase inhibitors used in oncology to block aberrant signaling in cancer cells (Source: StatPearls). However, because the Mg2+-ATP binding motif is highly conserved across the proteome, achieving high selectivity for a specific enzyme remains a significant challenge in drug development to avoid off-target effects (Source: PubChem). Dysregulation of magnesium-dependent ATP utilization is linked to numerous conditions, including cardiovascular disease, diabetes, and neurodegeneration (Source: Wikipedia).

Other names

Mg2+-ATP binding sitesMagnesium-dependent ATPasesATP-binding pocketMg-ATP enzymesMagnesium-coordinated catalytic domains

Competitive inhibition of the ATP-binding site or modulation of the magnesium-coordinated catalytic domain to prevent phosphate transfer or ATP hydrolysis.