酵母葡萄糖重塑蛋白Bgl2p:氨基酸性质和细胞壁附着方式
Nikita A Motorin1, Gennady I Makarov2, Valentina V Rekstina1
1Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia.
International journal of molecular sciences
|January 8, 2025
概括
酵母细胞壁蛋白Bgl2pp是酵母细胞壁中的蛋白质.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 微生物学 微生物学
背景情况:
- Bgl2p是酵母细胞壁中的一个关键的glucanosyltransglycosylase.
- 已知其强大的非共价 anchoring 和纤维化的潜力.
- Bgl2p细胞壁附着的确切机制仍然难以捉摸.
研究的目的:
- 为了阐明Bgl2p在酵母细胞壁中的定机制.
- 调查C端区域 (CTR) 和Bgl2p附着物中的特定氨基酸残留的作用.
- 探索影响Bgl2p相互作用和粉样蛋白形成的构造变化.
主要方法:
- 位点导向的突变发生 (Glu-233/Ala替代).
- 计算机建模 (AlphaFold,分子建模).
- 原子力显微镜 (AFM) 的结构.
主要成果:
- 替代Glu-233/Ala削弱了Bgl2p的固定.
- 在Bgl2p附着和动中,CTR起着至关重要的作用.
- 形态变化,可能涉及二硫化物键,影响互动的CTR可访问性.
- 确定了一种特定的 (V187MANAFSYWQ196),可能会诱导粉样蛋白的形成.
结论:
- Bgl2p的定受其活跃中心和CTR的影响.
- 内部分子二硫化物键和形状灵活性调节Bgl2p相互作用.
- 鉴定到的表明了Bgl2p相互作用中粉样蛋白诱导的机制,具有潜在的医学意义.
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