抗生素骨多样化通过差异性乙烯基还原酶招募和模块代在转基因转基因多基基酶中
Xinyun Jian1,2,3,4, Fang Pang1, Christian Hobson1
1Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
Journal of the American Chemical Society
|February 23, 2024
概括
研究格拉迪奥林和乙抗生素的生物合成揭示了聚胺合成酶 (PKS) 的微妙差异如何产生结构多样性. 这项研究揭示了微生物的自然产物进化和工程潜力.
科学领域:
- 生物化学和分子生物学
- 自然产品化学
- 微生物学
背景情况:
- 微生物天然产品由于其复杂的分子结构和选择性生物活性,在医学和农业中至关重要.
- 对于自然产品研究来说,了解产生这些化合物的骨多样性的进化机制至关重要.
- 对生物合成途径的比较分析提供了有关代谢物的结构变化的起源.
研究的目的:
- 对两种结构相关的多基类抗生素格里奥林和埃特纳吉恩进行比较生物合成研究.
- 阐明了尽管它们几乎相同的多基合成酶 (PKS) 的C21侧链具有显著差异的机制.
- 探索这些发现对新型聚基结构的生物合成工程的影响.
主要方法:
- 格拉迪奥林 (来自*Burkholderia gladioli*) 和乙 (来自*Sorangium cellulosum*) 的生物合成途径的比较分析.
- 使用简化基质类似物进行关键生物合成转化的体外复制.
- 基因删除和补充实验以分析特定PKS域和独立酶的作用.
主要成果:
- 负责组装格拉迪奥林和乙基的多基合成酶 (PKS) 几乎相同,但它们的C21侧链在长度和和度上有显著差异.
- 和的格拉迪奥林侧链归因于1模块中的cis-acting enoylreductase (ER) 域和PKS5模块中的独立ER的转录.
- 在没有独立ER的情况下,格拉迪奥林PKS的5模块显示了内在的代性,这解释了在etnangien中观察到的较长的侧链.
结论:
- 这项研究阐明了酶域中的微妙变异及其在高度保存的PKS中招募如何在多基天然产品中产生显著的结构多样性.
- 这些发现提供了对格拉迪奥林和乙基生物合成的侧链多样化机制的理解.
- 获得的洞察力对于推进旨在创建具有潜在治疗应用的新型聚基骨的生物合成工程策略至关重要.
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