乙酸环酶介导的信号通路,用于调节替代和毒素生物合成以及替代的致病性

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Kai-Chu Huang^1,2, Hsin-Yu Lu^1,2, Celine Yen Ling Choo³

¹Department of Plant Pathology, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung, Taiwan.

Frontiers in fungal biology

|February 23, 2026

概括

在真菌病原体A. alternata中的腺酸环酶 (AaAC) 对于铁的吸收和毒性至关重要. 它的缺失损害了 siderophore 生产和毒素生物合成,突出显示了 AaAC 在真菌病原性中的作用.

科学领域:

菌类学菌类学是指菌类学.
分子生物学分子生物学
植物病理学植物病理学

背景情况:

循环AMP-蛋白激酶A (PKA) 在 siderophore 中介铁吸收和植物病原菌中毒性的信号作用尚不清楚.
在Alternaria alternata (A. alternata) 中的腺酸环酶 (AaAC) 影响生长,结合,铁稳态,自, siderophore 生物合成和毒素产生.

研究的目的:

调查AaaAC在调节铁稳态, siderophore生物合成和A. alternata中毒性的作用.
为了阐明涉及AaaAC,Gα和PKA的信号通路,以响应环境线索.

主要方法:

涉及AaaAC,Gα,PKA催化和调节子单元的删除突变的遗传研究.
在缺铁条件下进行转录基因分析.
基因本体学分析.

主要成果:

删除 AaAC 损害了 siderophore 分泌,破坏了对铁的敏感基因表达,并取消了 ACT 毒素的产生,显著降低了毒性.
AaAC 删除导致了广泛的基因表达变化,特别是 siderophore 生物合成和 ACT 毒素生产基因的下调.
对于 siderophore 生物合成的环境信号似乎通过 Gα-AaAC-PKA 级联传输. 在营养丰富的条件下,AaaAC还会负面调节自.

结论:

AaAC是代谢途径的关键调节者,对A. alternata的生存和致病性至关重要.
AaAC集成环境信号以维持铁的稳态,控制毒素的产生,并驱动真菌的毒性.
通过调节自,AaAC在细胞能量保存和生理稳定方面发挥着至关重要的作用.

关键词:

这是一种ACT毒素.亚地尼酸环酶是什么自自是自的过程.在CAMP中,我们可以使用cAMP.这种植物是 siderophores.

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