Cofactor-dependent metabolic enzyme

Cofactor-dependent metabolic enzymes are a broad class of proteins that require non-protein chemical components, known as cofactors, to perform their biological functions (Source [1], [2]). These cofactors include metal ions and complex organic molecules, many of which are derived from essential vitamins such as thiamine (B1), riboflavin (B2), and pyridoxine (B6) (Source [3], [4]). Cofactors can be broadly categorized into essential metal ions and organic coenzymes, which may be tightly bound prosthetic groups or loosely associated cosubstrates (Source [2]). These enzymes are integral to central metabolic pathways, including the citric acid cycle, glycolysis, and the metabolism of amino acids and fatty acids. Dysregulation or mutation of these enzymes is linked to various diseases; for example, mutations in isocitrate dehydrogenase (IDH1/2) lead to the production of the oncometabolite 2-hydroxyglutarate in certain cancers (Source [1]). Therapeutic targeting of these enzymes often involves small molecules that compete with the cofactor or substrate, or drugs like isoniazid and phenelzine that interact with specific cofactor-dependent mechanisms (Source [1]). Because these enzymes are essential for normal cellular homeostasis, pharmacological intervention requires careful management to avoid systemic toxicity or secondary metabolic deficiencies (Source [3]).

Other names

Coenzyme-dependent enzymesHoloenzymesVitamin-dependent enzymesCofactor-requiring enzymes

Drugs targeting these enzymes typically act through competitive inhibition of the cofactor or substrate binding sites, or via covalent modification of the cofactor itself (e.g., hydrazine-based inhibitors) (Source [1]).