(±) - 尼米辛A和染色米辛A-D,由II型多基基因基因群表达方式发现的重新排列的芳香多基基因
Xiaofei Huang1, Xiao Xu1, Luning Zhou1
1Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.
Journal of natural products
|February 28, 2025
概括
使用异构表达式发现了两种新型的螺旋芳香多基基和非典型的基克林. 一种化合物 (+) - 尼米辛A,对NCI-H446癌细胞表现出细胞毒性活性.
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
- 生物技术是生物技术.
背景情况:
- 二型多基化物生物合成途径复杂,产生各种生物活性化合物.
- 这些通路的基因操纵,例如禁用特定的酶,可以导致新的化学结构.
- 黄蛋白单氧化酶在修改多基基介质中发挥着作用.
研究的目的:
- 通过修改已知的II型多基因集群来发现新型多基因天然产品.
- 描述新发现的化合物的结构和绝对配置.
- 评估分离的自然产品的生物活性.
主要方法:
- 一个II型多基基因基因集群的异质表达,其中有一个失活的黄蛋白单氧酶.
- 使用核磁共振 (NMR) 谱学,质谱学 (MS) 和单晶X射线衍射的结构阐明.
- 通过理论NMR计算,DP4+概率分析和电子循环二元化 (ECD) 分析来确定绝对配置.
主要成果:
- 发现和描述两种新型的螺旋芳香多基基酸, (+) - 和 (-) - 氨基胺A (1).
- 鉴定了四种非典型的安古西克林,染色胺A-D (2-5),具有不寻常的循环模式.
- 化合物 (+) - 费奥尼米辛A对NCI-H446细胞具有细胞毒性活性,其IC50为2.26μM.
结论:
- 这项研究成功地通过向基因集群操纵识别了前所未有的螺旋芳香多基基和新型安古西克林变体.
- 这些发现扩大了多基化天然产品的结构多样性.
- 费奥尼米辛A是一种有前途的化合物,可用于进一步研究抗癌药物开发.
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