Divalent metal ion

Divalent metal ions refer to a broad chemical class encompassing all positively charged ions with a +2 charge. Common biological examples include magnesium (Mg²⁺), calcium (Ca²⁺), manganese (Mn²⁺), and zinc (Zn²⁺). These ions are essential for life due to their roles as enzyme cofactors in catalysis, structural stabilizers for nucleic acids and proteins, participants in signal transduction pathways, and regulators of gene expression. For example, magnesium is critical for ATP binding and enzymatic reactions involving kinases; calcium is central to cellular signaling; zinc plays structural and catalytic roles in many enzymes. The biological importance varies by context—each individual ion has unique physiological functions. However, "divalent metal ion" is not itself a single molecular entity or therapeutic target but rather an umbrella term describing many different species. As such, it does not correspond to one canonical drug target like an enzyme or receptor would. Instead, drugs may interact with specific members within this group by chelation or modulation but do not generally "target" the entire class directly. Because this entry refers generically to all divalent cations rather than a defined molecule/protein/receptor/enzyme/transporter/etc., it should be considered incorrect as a canonical drug target name under standard conventions. For structured data purposes about therapeutic targets—where specificity at the molecular level is required—entries should refer instead to particular proteins that require these metals as cofactors ("Protein kinase A", "DNA polymerase", etc.) or to individual biologically relevant cations ("Magnesium ion", "Calcium ion"). In summary: while divalent metal ions are fundamental in biology through diverse mechanisms—including catalysis and regulation—they do not constitute a single actionable therapeutic target suitable for structured pharmacological databases.

Other names

Divalent cationMetal(II) ionMg²⁺Ca²⁺Mn²⁺Zn²⁺ (and other specific ions)

Cofactor for enzymes; Stabilization of nucleic acids and proteins; Modulation of protein activity