Intracellular enzymes

Intracellular enzymes" encompass a vast array of proteins that catalyze biochemical reactions inside cells. These enzymes play crucial roles across all aspects of cellular function, including metabolism, signaling, DNA/RNA processing, protein modification, and cell survival. Therapeutically, they are attractive drug targets both for inhibition (as with many cancer or antiviral drugs) and activation/replacement (as in enzyme replacement therapy for genetic metabolic disorders). Because intracellular enzymes are not exposed on the cell surface, delivering drugs or therapeutic proteins to these targets poses considerable drug development challenges, requiring specialized delivery systems and careful consideration of specificity, toxicity, and immunogenicity. "Intracellular enzymes" is an umbrella term, not a specific target. It covers a large, diverse molecular class fundamental to cell biology and medicine, but it is too broad and unspecific for structured data tied to a single canonical entity. For structured information, reference should be made to a specific enzyme (e.g., "Ornithine transcarbamylase," "Alpha-galactosidase A," "Tyrosine kinase") rather than to the entire broad class.

Inhibition of enzymatic activity; Replacement of missing/deficient enzyme (ERT); Stabilization of misfolded enzyme (chaperone therapy); Targeted protein degradation; Prodrug activation (enzyme-prodrug therapy); Catalytic modification of substrates inside the cell.