在Aspergillus中通过GATA型调节器NsdD调节的物种特异性基因调节网络重新连接
Heungyun Moon1,2,3, Mi-Kyung Lee4, Junha Shin5
1Department of Plant Pathology, University of Wisconsin-Madison, Madison, Wisconsin, USA.
mBio
|July 3, 2025
概括
转录因子NsdD通过特定物种的基因调节网络 (GRNs) 协调阿斯伯吉卢斯的发育和代谢. 进化的重新连接使得这种保存因素能够获得不同的功能,影响真菌的特征.
科学领域:
- 菌类基因组学和分子生物学
- 丝状真菌中的转录调节.
- 基因调节网络的演变
背景情况:
- GATA型的转录因子NsdD对于阿斯伯吉勒斯种类的发育和代谢至关重要.
- 在NSDD的多功能作用背后的机制仍然在很大程度上是未知的.
- 了解NsdD的调节是破译真菌生物学和进化的关键.
研究的目的:
- 阐明在阿斯伯吉illus nidulans和阿斯伯吉illus flavus中NSdD的全基因组调节机制.
- 为了比较不同Aspergillus物种的NsdD介导基因调节网络 (GRNs).
- 调查进化重新连接在塑造NsdD保存功能的作用.
主要方法:
- 基于网络的多omics分析,包括转录组学和全基因组的ChIP-seq.
- 在A. nidulans和A. flavus之间进行交叉补充实验.
- 动机分析以确定保存的NsdD绑定站点和网络重建.
主要成果:
- NsdD表现出细胞类型和特定物种的基因表达调节.
- 全基因组ChIP-seq确定了数百个直接的NsdD目标,包括关键的发育和代谢调节者.
- 发现了一种保存的NsdD结合基因 (5'-GATCT-3 ');在物种之间观察到显著的GRN重新连接.
- 交叉补充部分恢复了表型,但突出了特定物种的NsdD功能.
- NsdD目标和相互作用的分歧有助于物种特异性特征,如形态学和毒素生产.
结论:
- NsdD通过特定物种的GRN来控制真菌的发育和代谢,直接调节重要的基因.
- 随着GRN的进化重新连接,保留的NsdD TF可以获得不同的监管角色.
- 对比的GRN地图为理解状真菌中的基因调节和TF进化提供了一个框架.
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