Strictosidine synthase catalyzes a Pictet-Spengler reaction in the first step in the biosynthesis of terpene indole alkaloids to generate strictosidine. The substrate requirements for strictosidine synthase are systematically and quantitatively examined and the enzymatically generated compounds are processed by the second enzyme in this biosynthetic pathway. (C) 2006 Elsevier Ltd. All rights reserved.
Substrate specificity and diastereoselectivity of strictosidine glucosidase, a key enzyme in monoterpene indole alkaloid biosynthesis
作者:Nancy Yerkes、Jia Xin Wu、Elizabeth McCoy、M. Carmen Galan、Shi Chen、Sarah E. O’Connor
DOI:10.1016/j.bmcl.2007.11.063
日期:2008.5
intermediate from which thousands of monoterpene indole alkaloids are derived. The steady-state kinetics of SGD with a variety of strictosidine analogs revealed the substrate preferences of this enzyme at two key positions of the strictosidine substrate. Additionally, SGD from C. roseus turns over both strictosidine and its stereoisomer vincoside, indicating that although this enzyme prefers the naturally occurring
来自长春花的胡豆苷葡萄糖苷酶 (SGD) 催化胡豆苷的去糖基化,胡豆苷是一种中间体,从中衍生出数千种单萜吲哚生物碱。SGD 与各种胡豆苷类似物的稳态动力学揭示了这种酶在胡豆苷底物的两个关键位置的底物偏好。此外,来自 C. roseus 的 SGD 翻转了胡豆苷及其立体异构体长春花苷,这表明虽然这种酶更喜欢天然存在的非对映异构体,但该酶并不完全具有非对映选择性。强调了 SGD 底物特异性在 C. roseus 代谢工程工作中的影响。
Substrate specificity of strictosidine synthase
作者:Elizabeth McCoy、M. Carmen Galan、Sarah E. O’Connor
DOI:10.1016/j.bmcl.2006.01.098
日期:2006.5
Strictosidine synthase catalyzes a Pictet-Spengler reaction in the first step in the biosynthesis of terpene indole alkaloids to generate strictosidine. The substrate requirements for strictosidine synthase are systematically and quantitatively examined and the enzymatically generated compounds are processed by the second enzyme in this biosynthetic pathway. (C) 2006 Elsevier Ltd. All rights reserved.