酵母蛋白相互作用的社会和结构结构
André C Michaelis1, Andreas-David Brunner1,2, Maximilian Zwiebel1
1Max-Planck Institute of Biochemistry, Martinsried, Germany.
Nature
|November 15, 2023
概括
研究人员绘制了Saccharomyces cerevisiae互动组图,确定了数千种蛋白质与蛋白质的相互作用. 这张全面的地图揭示了一个高度连接的酵母蛋白质,
科学领域:
- 分子生物学
- 系统生物学
- 蛋白质组学
背景情况:
- 细胞功能依赖于蛋白质与蛋白质的相互作用,这对于理解生物系统至关重要.
- 目前的相互作用图是不完整的,特别是对于低丰度,膜或对标签敏感的蛋白质复合体.
- 对现有的蛋白相互作用数据的可靠性评估具有挑战性.
研究的目的:
- 开发一种灵敏,高吞吐量的方法,用于全面的互动原子映射.
- 克服识别稀少且难以标记的蛋白质复合物的局限性.
- 创建一个接近和的Saccharomyces cerevisiae互动图.
主要方法:
- 开发了一种灵敏,高通量亲和度丰富与质谱法相结合的方法.
- 使用量化二维分析策略,在96井格式中减少体积.
- 分析了一种内源GFP标记的库,覆盖了整个表达的酵母蛋白.
主要成果:
- 从4159个拉下来产生了3,927个蛋白质和31004个相互作用的高度结构化网络.
- 与之前的地图相比,已知蛋白质的数量增加了一倍,可靠的相互作用增加了三倍.
- 识别了非常低的表观遗传和器官膜复合体,并推断了不可标记的复合体.
结论:
- 酵母相互作用高度相互连接,大多数蛋白质平均有16个相互作用体.
- 蛋白质之间的平均最短路径为4.2,类似于人类的社交网络.
- AlphaFold-Multimer提供了对复合体内未表征的蛋白质的功能性见解;数据可在www.yeast-interactome.org上获得.
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