title: Tyrosinase activity in ionic liquids.
abstract: Activity of mushroom tyrosinase was studied in three ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIm][PF(6)]), 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF(4)]) and 1-butyl-3-methylimidazolium methylsulfate ([BMIm][MeSO(4)]), and was compared to that in chloroform. Kinetic parameters of the enzyme were determined and the results indicate that the enzyme in ionic liquids basically follows the same catalytic mechanism as in water, and that the ionic liquids may affect the enzyme activity by direct interacting with the enzyme and thus hindering the E-S binding due to their high hydrophilicity and polarity.
authors.affiliation: College of Life Sciences, Shenzhen University, Shenzhen 518060, China. zyang@szu.edu.cn
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Ya-Jun
authors.initials: YJ
authors.lastname: Yue
authors.forename: Miao
authors.initials: M
authors.lastname: Xing
mesh_terms: D000363:Agaricales / Q000201:enzymology*; D045424:Complex Mixtures / Q000737:chemistry; D004789:Enzyme Activation; D004795:Enzyme Stability; D052578:Ionic Liquids / Q000737:chemistry*; D014442:Monophenol Monooxygenase / Q000737:chemistry*