Isoenzyme

An isoenzyme (isozyme) is a structurally different form of an enzyme that catalyses the same biochemical reaction as another enzyme. Although they perform identical functions, isoenzymes vary in amino acid sequence, tissue distribution, and regulatory properties, allowing the same metabolic process to occur efficiently under different physiological conditions.

In diagnostics, isoenzymes are powerful biomarkers. Measuring specific isoenzyme patterns helps clinicians identify organ damage, disease progression, or metabolic disorders. In drug discovery, targeting a specific isoenzyme can improve treatment selectivity and reduce side effects. The pharmaceutical industry leverages isoenzyme-specific targeting for precision medicine approaches, ensuring drugs modulate the correct tissue-specific enzyme form. As structural biology improves understanding of isoenzyme differences, isoenzyme-directed therapeutics continue enabling more precise and targeted treatment strategies.