在转录因子Efg1相分离过程中,类域的结构和相互作用
Szu-Huan Wang1, Tongyin Zheng1, Nicolas L Fawzi1
1Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, Rhode Island.
Biophysical journal
|February 1, 2024
概括
增强丝状生长蛋白1 (Efg1) 经历相分离,这对于Candida albicans的毒性至关重要. 氨酸在其类域中的氨酸残留物稳定了这一过程,提供了潜在的抗真菌标.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物物理学的生物物理.
背景情况:
- 白虫 Candida albicans 通过表观遗传变化从共生转变为致病.
- 这种转换是由转录因子 (TF) 调节的,特别是增强的细丝生长蛋白1 (Efg1).
- Efg1的类域 (PrLD) 和相分离是白色到不透明的转变的关键,但机制尚不清楚.
研究的目的:
- 为了研究Efg1相分离的生物物理基础.
- 阐明N端 (N) 和C端 (C) PrLDs在Efg1相隔离中的作用.
- 为了确定驱动Efg1相分离的特定氨基酸相互作用及其在毒性中的作用.
主要方法:
- 核磁共振 (NMR) 对Efg1域的结构分析.
- 进行NMR定位实验以研究相互作用.
- 凝聚相NMR光谱分析相位分离机制.
主要成果:
- Efg1 N-PrLD和C-PrLD在很大程度上是有部分α螺旋结构的失序.
- 在N-PrLD中的部分螺旋结构中介于自我相互作用和RNA结合.
- 过渡性α-螺旋结构中的氨酸残留物,特别是N-PrLD,对于稳定Efg1相分离至关重要.
结论:
- Efg1相位分离被其PrLDs中的过渡性α-螺旋结构稳定.
- 芳香残留物,特别是氨酸,在这种稳定中起着至关重要的作用.
- 了解这些相互作用可以了解C. albicans的毒性和潜在的抗真菌药物点.
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