F-box蛋白Fbx23作为转录协活性剂,识别和激活转录因子Ace1
Zhongjiao Liu1, Kexuan Ma1,2, Panpan Zhang1
1National Glycoengineering Research Center, Shandong University, Qingdao, China.
PLoS genetics
|January 21, 2025
概括
在Penicillium oxalicum中存在的SCFFbx23-Ace1泛素酶复合体调节了真菌的发育和基因表达. SCFFbx23的丧失会损害生长和色素,同时通过稳定Ace1转录因子来上调细胞酶基因.
科学领域:
- 分子生物学分子生物学
- 菌类生物学 菌类生物学
- 生物化学 生物化学
背景情况:
- 蛋白质无化和蛋白质体降解是关键的调节机制.
- 该SCF (Skp1-Cullin-F-box) E3泛基因酶复合体通过其F-box蛋白成分来确定基质特异性.
- 识别ubiquitin联酶-基质对对于理解细胞调节至关重要.
研究的目的:
- 在Penicillium oxalicum中识别和描述SCFFbx23-Ace1无素酶-基质对.
- 研究SCFFbx23在调节真菌发育和基因表达中的作用.
- 阐明SCFFbx23控制转录因子Ace1.1的稳定性和功能的机制.
主要方法:
- 酵母两杂交测定或共同免疫沉以确认蛋白质相互作用.
- 基因删除和补充实验,以评估PoFbx23.23的功能.
- 定量PCR测量基因转录水平.
- 西方涂抹用于分析蛋白质稳定性和无处不在.
主要成果:
- 在P.oxalicum中确定了SCFFbx23-Ace1对,PoFbx23主要定位在细胞核中.
- 删除PoFbx23导致化和色素受损,同时增加了 (hemi) 细胞酶基因的转录.
- 丢失PoFbx23导致非功能性,无处不在的Ace1蛋白质的积累,影响其DNA结合能力.
结论:
- 在P. oxalicum.中,PoFbx23充当真菌发育和新陈代谢的关键调节者.
- SCFFbx23控制了Ace1蛋白的稳定性,从而调节了参与生长,色素和 ( Hemi) 细胞酶生产的基因的转录.
- PoFbx23通过稳定Ace1作为转录协活性剂,对目标基因调节具有上下文依赖的影响.
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