Characterization of an epoxide hydrolase from the Florida red tide dinoflagellate, Karenia brevis
作者:Pengfei Sun、Cristian Leeson、Xiaoduo Zhi、Fenfei Leng、Richard H. Pierce、Michael S. Henry、Kathleen S. Rein
DOI:10.1016/j.phytochem.2015.11.002
日期:2016.2
hydrolases (EH, EC 3.3.2.3) have been proposed to be key enzymes in the biosynthesis of polyether (PE) ladder compounds such as the brevetoxins which are produced by the dinoflagellate Karenia brevis. These enzymes have the potential to catalyze kinetically disfavored endo-tet cyclization reactions. Data mining of K. brevis transcriptome libraries revealed two classes of epoxide hydrolases: microsomal and
环氧化物水解酶 (EH, EC 3.3.2.3) 被认为是聚醚 (PE) 阶梯化合物生物合成中的关键酶,例如由短鞭毛藻产生的短毒素。这些酶具有催化动力学上不利的内-tet 环化反应的潜力。K. brevis 转录组文库的数据挖掘揭示了两类环氧化物水解酶:微粒体和白三烯 A4 (LTA4) 水解酶。克隆并表达微粒体 EH 以进行表征。该酶是一种分子量为 44kDa 的单体蛋白质。使用各种环氧化物底物评估动力学参数,以评估底物选择性和对映选择性,以及其催化环氧醇的关键内四端环化的潜力。