基于基因组的删除分析揭示了阿斯伯吉illus nidulans 中的 prenyl xanthone 生物合成途径
James F Sanchez1, Ruth Entwistle, Jui-Hsiang Hung
1Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, School of Pharmacy, 1985 Zonal Avenue, Los Angeles, California 90089, United States.
Journal of the American Chemical Society
|March 1, 2011
概括
研究人员阐明了阿斯伯吉卢斯尼杜兰斯 (Aspergillus nidulans) 中prenyl xanthone生物合成的遗传基础. 他们确定了关键基因,包括一个多基酸合成酶和两个前转移酶,揭示了这些生物活性化合物的完整途径.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 菌群学 菌群学 菌群学是指菌群学
背景情况:
- 克桑是一种多样化的分子类别,具有显著的生物活动和潜在的药物标.
- 了解克桑生物合成对于代谢工程和增强有价值化合物的生产至关重要.
- 丝状真菌Aspergillus nidulans产生先化,包括沙米和埃米塞林.
研究的目的:
- 为了在基因上阐明阿斯伯吉卢斯尼杜兰斯中prenylated xanthones的生物合成途径.
- 为了确定负责桑核结构形成和化的特定基因.
- 建议在这种真菌物种中提出一个全面的克桑生物合成模型.
主要方法:
- 针对性基因删除实验在阿斯伯吉路斯尼杜兰斯中进行.
- 研究了一种多基基合成酶基因 (mdpG) 和七种假定的先转移酶基因.
- 从删除菌株中分离出中间化合物,并分析其路径.
主要成果:
- 一组10个基因,包括mdpG,对于prenyl xanthone生物合成至关重要.
- 埃莫丁和单极型被确定为prenyl xanthones的前体.
- 发现位于主要基因集群之外的两个特定的前转移酶基因对前化至关重要.
结论:
- 这项研究成功地确定了阿斯伯吉路斯尼杜兰斯 (Aspergillus nidulans) 中的prenyl xanthone生物合成背后的遗传机制.
- 已经提出了一个完整的生物合成途径,涉及核心结构形成和先化步骤.
- 这项研究为未来的桑生产工程和开发新型桑衍生物奠定了基础.
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