Active Site Loop Engineering Abolishes Water Capture in Hydroxylating Sesquiterpene Synthases.

Active Site Loop Engineering Abolishes Water Capture in Hydroxylating Sesquiterpene Synthases.
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DOI:
10.1021/acscatal.3c03920
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发表时间:
2023-11-03
期刊:
影响因子:
12.9
通讯作者:
Allemann, Rudolf K.
Allemann, Rudolf K.
中科院分区:
化学1区
文献类型:
--
作者:
Srivastava, Prabhakar L.;Johns, Sam T.;Walters, Rebecca;Miller, David J.;van der Kamp, Marc W.;Allemann, Rudolf K.

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萜烯合成酶(TS)催化复杂反应,从线性二磷酸异戊二酯中产生多种萜烯骨架。广藿香酚合成酶(PTS)将法尼酯二磷酸转化为广藿香酚。通过模拟引导工程,我们获得了消除水捕获的PTS变体。此外,研究人员还发现,对结构保守的Hα-1环进行修饰也会降低PTS和germacradiene-11-ol合成酶(Gd11olS)的羟基化作用,从而生成环中性中间体,包括α-丁烯(PTS)和异戊二烯(Gd11olS)。Hα-1环修饰可能是工程倍半萜合成酶产生复杂环烃的一般策略,而无需确定结构或建模。
Terpene synthases (TS) catalyze complex reactions to produce a diverse array of terpene skeletons from linear isoprenyl diphosphates. Patchoulol synthase (PTS) from Pogostemon cablin converts farnesyl diphosphate into patchoulol. Using simulation-guided engineering, we obtained PTS variants that eliminate water capture. Further, we demonstrate that modifying the structurally conserved Hα-1 loop also reduces hydroxylation in PTS, as well as in germacradiene-11-ol synthase (Gd11olS), leading to cyclic neutral intermediates as products, including α-bulnesene (PTS) and isolepidozene (Gd11olS). Hα-1 loop modification could be a general strategy for engineering sesquiterpene synthases to produce complex cyclic hydrocarbons without the need for structure determination or modeling.
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