Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
Related to tyrosinase: tyrosine


 (tī-rŏs′ə-nās′, -nāz′)
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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌtaɪrəʊsɪˈneɪz; ˌtɪrəʊ-)
(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 albinism
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈtaɪ roʊ sɪˌneɪs, -ˌneɪz, ˈtɪr oʊ-)

an enzyme of plant and animal tissues that catalyzes the aerobic oxidation of tyrosine into melanin and other pigments.
[< French (1896); see tyrosine, -ase]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
A tyrosinase missense mutation causes albinism in the Wistar rat.
Tyrosinase activities are widely distributed in all domains of life from microorganisms to mammals.
In mussels, the inclusion of DOPA in byssal thread adhesive proteins is thought to be mediated by a tyrosinase (Guerette et al., 2013).
Mushroom tyrosinase, L-tyrosine and koijc acid were obtained from Sigma Aldrich, Johannesburg, RSA.
Results of our study are also in conformity with most of the previous studies, which showed female predominance suffering from melasma.2-5 HQ works by inhibiting the tyrosinase and thus prevents the conversion of DOPA to melanin and is also related to tyrosinase destruction and melanosome degradation.
Photo inactivation of Agaricus bisporus tyrosinase: Modification of the binuclear copper site.
Inhibitory effect of morin on tyrosinase: Insights from spectroscopic and molecular docking studies.
Mushroom tyrosinase inhibition (19) was performed as previously reported with modifications.
Inflammatory molecules can also trigger melanin formation, so we are not only inhibiting the tyrosinase activity--at the very heart where melanin is built--but we also interrupt the signaling pathways that trigger melanin formation."
For this reason, most of these agents are tyrosinase inhibitors.