Metalloenzymes and Metalloproteins (None universally; common abbreviations are context-dependent (e.g., "SOD" for superoxide dismutase, a metalloenzyme))

Metalloenzymes and metalloproteins are proteins that incorporate metal ions (such as iron, copper, zinc, magnesium, or manganese) into their structure. The metal ion is crucial for their biological function, which may include catalysis (in enzymes), electron transfer, regulation of gene expression, transport and storage of oxygen, and providing structural stability to tissues. Metalloenzymes represent the enzymatic subclass, in which the metal is essential for catalysis. Non-enzymatic metalloproteins use the metal for other crucial functions, like oxygen transport (hemoglobin) or gene regulation (zinc finger proteins). Some metalloenzymes and metalloproteins are major therapeutic targets, especially those involved in vital processes such as redox chemistry, DNA replication, and detoxification; dysfunction or misregulation is linked to diverse diseases, including cancer, neurodegeneration, and metabolic disorders. Because “Metalloenzymes and Metalloproteins” is a broad category, precise targeting for drug development or research requires specification of individual proteins, such as “carbonic anhydrase” or “matrix metalloproteinase.” Mis-metallation (incorrect metal loading) is a typical source of toxicity or disease pathology. Artificial/inspired metalloproteins are also an area of active research.

Other names

MetalloproteinsMetalloenzymes (for the enzyme subset)Metal-binding proteinMetal-containing protein

Metal chelation (inhibition or modulation by removing/coordinating metal cofactor); Enzyme inhibition (direct active site blockade); Redox modulation (alteration of electron transfer properties); Mimicry (artificial enzymes replace or supplement function)