转录因子AtnN能否协调阿斯珀吉卢斯尼杜兰斯中阿斯珀克里普二次代谢物基因集群,成为全球调节者?
Beatrix Kocsis1, Imre Boldizsár2, Gábor M Kovács3
1Department of Molecular Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, Hungary; HUN-REN-DE Fungal Stress Biology Research Group, Debrecen, Hungary.
Fungal biology
|December 6, 2024
概括
这项研究研究了atnN转录因子在Aspergillus nidulans中的作用,揭示了它对真菌生长,抗压力和生产有价值的二次代谢物,如 siderophores 和 mycotoxins 的影响.
科学领域:
- 菌类学 菌类学是指菌类学.
- 生物化学 生物化学
- 遗传学 遗传学 是一个
背景情况:
- 菌的二次代谢物为医学应用提供了潜力.
- 这些代谢物的基因集群可以被环境压力因素激活.
- 在阿斯珀吉卢斯尼杜兰斯中,阿斯珀克里普丁基因集群,包括atnN转录因子,由二硫酸梅纳 (MSB) 激活.
研究的目的:
- 为了研究阿斯伯吉路斯尼杜兰斯中atnN转录因子的功能.
- 分析atnN基因缺失和过度表达对真菌表型和二次代谢物产生的影响.
- 了解压力反应,性繁殖和二次新陈代谢之间的相互作用.
主要方法:
- 对atnN基因删除 (ΔatnN) 和过度表达 (atnNOE) 突变物的生成和表型分析.
- 评估不同条件下的殖民地生长情况.
- 在不同的介质中量化二次代谢产物 (siderophores,阿斯珀素,sterigmatocystin) 的产生.
- 评估对三丁氧化 (tBOOH),MSB,刚果红色和酸盐的抗应力.
主要成果:
- 过度表达atnN减少了殖民地生长.
- ΔatnN突变体对tBOOH的敏感性增加,而atnNOE突变体对MSB,刚果红色和索尔比托尔表现出抗性.
- atnN操纵影响了 siderophore 生产 (减少细胞外TAFC,增加细胞内FC在atnNOE中),增加阿斯素在DatnN中,并改变了硬质细胞素水平 (在DatnN中升高,在atnNOE中降低).
- 删除atnN降低了cleistothecia的形成.
结论:
- 该atnN转录因子在调节真菌生长,应激反应和Aspergillus nidulans中的二次代谢物生物合成方面发挥着重要作用.
- 二次代谢物生产是复杂的协调和链接到应激反应和性发展,可能由转录因子,如atnN.
- 了解atnN功能,可以了解如何利用真菌生物活性化合物用于药用目的.
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