光激活的BioID - 一个光学激活的近距离标记系统,用于研究蛋白质-蛋白质相互作用
Omer Shafraz1, Carolyn Marie Orduno Davis1, Sanjeevi Sivasankar1
1Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616, USA.
Journal of cell science
|September 27, 2023
概括
我们开发了光激活的BioID (LAB),这是研究蛋白质相互作用的新方法. 实验室使用光来控制近距离标签,提高准确性和减少假阳性在绘制蛋白质伙伴如E-cadherin.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 接近性标签对于研究细胞内的蛋白质-蛋白质相互作用至关重要.
- 目前的方法缺乏对酶标记过程的精确控制,限制了准确性.
- 开发可控制的近距离标记技术对于精确的生物研究至关重要.
研究的目的:
- 引入一种新的光激活近距离标记技术,用于绘制蛋白质与蛋白质相互作用的地图.
- 为了提高近距离标记的准确性和精度,特别是在细胞膜.
- 为现有的近距离标签方法提供可控的替代方案.
主要方法:
- 通过将分裂的TurboID酶半部分融合到光二聚蛋白CRY2和CIB1.1,开发出光激活的BioID (LAB).
- 利用蓝光诱导CRY2-CIB1二分化,复制TurboID,并启动生物化.
- 在各种细胞系中证明了光诱导的生物化及其在光去除时的停止.
- 与TurboID对比的基准LAB使用E-cadherin作为模型蛋白质.
主要成果:
- 在光激活时,LAB成功地绘制了高准确度和精确度的蛋白质-蛋白质相互作用图.
- 光诱导的CRY2和CIB1二元化有效地重建了分裂-TurboID活动.
- 生物化是精确控制的,以光启动并停止其移除.
- 实验室确定了E-cadherin结合伙伴,其准确性明显高,假阳性比TurboID少.
结论:
- 光激活生物识别仪 (LAB) 提供了一个强大的,可控制的工具,用于绘制蛋白质-蛋白质相互作用的地图.
- 实验室提高了近距离标记的精度,特别是对于像E-cadherin这样的膜蛋白.
- 这项技术为研究细胞相互作用的研究提供了显著的进步,并减少了实验噪声.
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