Detoxification enzyme (None)

Detoxification enzymes refer to a broad set of enzymes responsible for metabolizing and eliminating harmful compounds, including drugs and environmental toxins. These enzymes are generally classified as Phase I (oxidative; e.g., cytochrome P450 family), Phase II (conjugative; e.g., glutathione S-transferase, UDP-glucuronosyltransferase), and Phase III (transport; e.g., ATP-binding cassette (ABC) transporters). Phase I enzymes primarily introduce reactive or polar groups to substrates, Phase II enzymes conjugate substrates to increase their solubility, and Phase III enzymes facilitate excretion from the cell. They play a critical role in pharmacology, toxicology, nutrition, disease processes, and the response to inflammation and oxidative stress. The collective activity of these enzymes ensures protection against the accumulation of toxic metabolites, influences drug efficacy and toxicity, and is subject to regulation by transcription factors such as the aryl hydrocarbon receptor and nuclear receptors. For structured data, individual enzyme family names (e.g., "Cytochrome P450 3A4," "Glutathione S-transferase Mu 1") should be specified instead of the collective term "Detoxification enzyme."

Other names

Drug-metabolizing enzymebiotransformation enzymexenobiotic-metabolizing enzymePhase I enzymePhase II enzymePhase III enzyme

Drugs may act as: Substrate (metabolized and eliminated by the enzyme); Inhibitor (blocks enzyme activity, increases drug effect or toxicity); Inducer (increases enzyme expression, reduces drug efficacy or increases metabolite formation)