关于sarpagan和akuammiline类生物合成的立体化学见解
Scott Galeung Alexander Mann1, Melina Paz-Galeano1, Mohammadamin Shahsavarani1
1Department of Chemistry, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada.
The New phytologist
|June 3, 2025
概括
被称为sarpagan桥梁酶和rhazimal合成酶的酶控制C16的立体化学在单基因 indole 类生物合成. 这项研究揭示了下游酶如何在这些重要的植物化合物中创造立体化学多样性.
科学领域:
- 植物生物化学 植物生物化学
- 代谢工程是代谢工程.
- 自然产品的生物合成.
背景情况:
- 单类醇类化合物 (MIAs) 是具有制药潜力的植物衍生化合物.
- 它们的生物合成涉及通过细胞P450单氧化酶 (CYPs) 来氧化的氧化循环.
- 在MIA衍生品中,预期的和自然的C16立体化学存在差异.
研究的目的:
- 在sarpagan和akuammiline MIA生物合成中研究C16的立体化学.
- 澄清了sarpagan桥梁酶 (SBE) 和rhazimal合成酶 (RHSs) 的作用.
- 了解在MIA中产生立体化学多样性的酶步骤.
主要方法:
- 在6种产生MIA的物种中进行基因发现的比较.
- 在植物中,对Catharanthus roseus SBE.的基因沉默.
- 在体外酶特性和中间核磁共振分析.
主要成果:
- 确定了五个新的CYP和一个新的akuammidine aldehyde减少酶.
- RHS酶始终产生16R的体立体同位素.
- SBEs产生16R多氨酸合物及其16S合物,下游酶进一步合C16.
结论:
- 酶定制步骤控制了Sarpagan MIA生物合成中的C16立体化学.
- 下游酶有助于特定物种的立体化学多样性.
- 提供了关于植物特种新陈代谢的途径进化和立体化学多样化的洞察力.
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