来自Kitasatospora viridis的细菌塞斯特维里丁合成酶的机械特征
Houchao Xu1, Gregor Schnakenburg2, Bernd Goldfuss3
1Kekulé-Institute for Organic, Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany.
Angewandte Chemie (International ed. in English)
|June 7, 2023
概括
研究人员克隆了来自Kitasatospora viridis的基因,表达了大肠杆菌中的聚合成酶. 这种酶有效地从格兰二酸 (GFPP) 中产生了塞斯特烯碳化合物塞斯特维里丁A.
科学领域:
- 自然产品化学 自然产品化学
- 分子生物学分子生物学
- 酶学 是一种酶学.
背景情况:
- 烯合成酶是各种异oprenoid化合物的生物合成中的关键酶.
- 基塔萨托斯波拉维里迪斯 (Kitasatospora viridis) 是潜在的新型天然产品的来源.
- 斯特烯,C25类,代表了一个较少探索的自然产品类别.
研究的目的:
- 从Kitasatospora viridis克隆和表征一种合成酶同类物.
- 为了研究复合酶的酶活性和产品概况.
- 阐明产生的甲的结构,绝对配置和循环机制.
主要方法:
- 在大肠杆菌中基因克隆和重组蛋白质表达.
- 使用格拉尼尔法尔尼西尔二酸盐 (GFPP) 的酶转化试验.
- 使用NMR和X射线晶体学对产品的隔离和结构阐明.
- 通过化学相关性和异常分散来确定绝对配置.
- 使用同位素标记和密度函数理论 (DFT) 计算的机制研究.
主要成果:
- 一种重组聚合成酶成功地被表达和净化.
- 该酶有效地将GFPP转化为塞斯特维里丁A,产量为19%.
- 确定了两个轻微的副作用,形成约0.1%的收益率.
- 证实了塞斯特维里丁A的结构分配和绝对配置.
- 循环化机制得到了广泛的研究,为烯生物合成提供了洞察力.
结论:
- 一种来自Kitasatospora viridis的新型聚合成酶已经被描述.
- 该酶以高效率产生塞斯特烯碳化合物塞斯特维里丁A.
- 详细的机理和结构研究提供了对这种塞斯特烯生物合成途径的全面了解.
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