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tyrosinaseenUK
ty·ros·i·nase T0451300 (tī-rŏs′ə-nās′, -nāz′)n. Any of a family of copper-containing enzymes found in animal and plant tissues, fungi, and bacteria, that catalyze the oxidation of phenolic compounds and are responsible for production of the pigment melanin from tyrosine and for the browning of fruits, vegetables, and mushrooms when cut and exposed to air.tyrosinase (ˌtaɪrəʊsɪˈneɪz; ˌtɪrəʊ-) n (Biochemistry) an enzyme occurring in many organisms that is a catalyst in the conversion of tyrosine to the pigment melanin; inactivity of this enzyme results in albinismty•ro•si•nase (ˈtaɪ roʊ sɪˌneɪs, -ˌneɪz, ˈtɪr oʊ-)
n. an enzyme of plant and animal tissues that catalyzes the aerobic oxidation of tyrosine into melanin and other pigments. [< French (1896); see tyrosine, -ase] TyrosinaseenUK
tyrosinase[′tir·ə·sə‚nās] (biochemistry) An enzyme found in plants, molds, crustaceans, mollusks, and some bacteria which, in the presence of oxygen, catalyzes the oxidation of monophenols and polyphenols with the introduction of ‒OH groups and the formation of quinones. Tyrosinase (ortho-diphenoloxidase), a enzyme of the oxidoreductase class that is present in almost all animals and plants. Tyrosinase catalyzes the oxidation of the amino acid tyrosine into dopa during the biosynthesis of melanins. It takes part in the synthesis of epinephrine and in other metabolic processes. Hereditary disruption of tyrosinase activity or the absence of tyrosinase causes albinism. Tyrosinase has been found to be identical to polyphenoloxidase. tyrosinaseenUK
mon·o·phe·nol mon·o·ox·y·gen·ase (mon-ō-fē'nol mon'ō-oksĭ-jen-ās'), 1. A copper-containing oxidoreductase that catalyzes the oxidation of o-diphenols to o-quinones by O2, with the incorporation of one of the two oxygen atoms in the product; it also catalyzes the oxidation of monophenols, such as l-tyrosine, to dihydroxy-l-phenylalanine (dopa), a precursor of melanin and epinephrine (catecholamines), and can act as a catechol oxidase; a deficiency of this enzyme is observed in several forms of albinism. Synonym(s): cresolase, monophenol oxidase, tyrosinase2. Synonym(s): laccasetyrosinase (tī-rŏs′ə-nās′, -nāz′)n. A copper-containing enzyme of plant and animal tissues that catalyzes the production of melanin and other pigments from tyrosine by oxidation, as in the blackening of a peeled or sliced potato exposed to air.tyrosinase (1) Catechol oxidase, EC 1.10.3.1.
(2) Monophenol monooxygenase, EC 1.14.18.1.tyrosinase A copper-containing enzyme that occurs in melanocytes and catalyses the production of MELANIN from TYROSINE. Also known as monophenol mono-oxygenase.TyrosinaseAn enzyme in a pigment cell which helps change tyrosine to DOPA during the process of making melanin.Mentioned in: AlbinismSee TYR
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