酵母转录调节器Ixr1中的内在无序区域支持类似子的行为
Aida Barreiro-Alonso1,2,3, Cora Rey-Souto1,2,3, Mónica Lamas-Maceiras1,2,3
1Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, Campus de Elviña, As Carballeiras, s/n, 15071, A Coruña, Spain.
Scientific reports
|January 6, 2026
概括
参与应激反应的酵母蛋白Ixr1通过其内在无序区域 (IDR) 形成粉样结构. 与Ssn8的相互作用可能会降低Ixr1.
科学领域:
- 酵母分子生物学酵母分子生物学
- 蛋白质的结构和功能.
- 应激反应机制 应激反应机制
背景情况:
- Ixr1是一种酵母转录调节剂,参与细胞应激反应.
- 对于Ixr1存在有限的结构信息,尽管它拥有DNA结合的HMG盒和预测的内在无序区域 (IDR).
- Ixr1表现出非球状的特性,易于聚合,存在于单体-二元平衡状态.
研究的目的:
- 研究酵母转录调节器Ixr1.1的结构性质和聚合行为.
- 探索Ixr1内在无序区域 (IDRs) 在蛋白质聚合和类行为中的作用.
- 阐明Ixr1与Ssn8.8相互作用的结构影响.
主要方法:
- 内在无序区域 (IDR) 的计算预测.
- 生物化学试验使用甲来研究蛋白质-蛋白质相互作用和寡合化.
- 在体外和体外的粉样蛋白形成试验.
- 构建和分析涉及Ixr1和Sup35.5的嵌合蛋白质.
- 人工智能 (AI) 辅助的蛋白质建模以研究Ixr1-Ssn8相互作用.
主要成果:
- Ixr1形成大型寡合体和粉样结构,通过体外和体外方法证实了这一点.
- 发现Ixr1的内在无序区域 (IDR) 当被替换成Sup35时会赋予类似的特性.
- 人工智能辅助建模表明,与Ssn8的相互作用可能会减少Ixr1的无序性和聚合性,从而促进折叠.
结论:
- 酵母Ixr1蛋白具有通过其IDRs调解的粉原性质.
- Ixr1的IDR对其聚合至关重要,并且可以诱导类似的特征.
- 与Ssn8的相互作用可能会调节Ixr1的结构,减少其无序性质和聚合倾向.
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