通过冷电子显微镜和质谱学同时进行多克隆抗体测序和表位图绘制
Douwe Schulte1, Marta Šiborová1, Lukas Käll2
1Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan, Utrecht, Netherlands.
eLife
|April 23, 2025
概括
研究人员开发了一种新的方法来测序抗体,并使用冷电子显微镜 (cryo-EM) 和质谱学绘制它们的标. 这种方法有助于通过分析血清中的抗体库来理解适应性免疫.
科学领域:
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 抗体对于对病原体的适应性免疫至关重要.
- 鉴定抗原特异性抗体的特征对于理解免疫反应至关重要.
- 目前的方法可能在同时测序抗体和绘制表位图时存在局限性.
研究的目的:
- 探索一种分析方法,直接从康复者血清中表征抗原特异性抗体库.
- 为了使同时进行抗体测序和表位图绘制.
- 从冷EM数据评估深度学习对新抗体测序的性能.
主要方法:
- 使用单颗粒冷电子显微镜 (cryo-EM) 来重建抗体-抗原复合体.
- 使用自下而上的蛋白质组学 (LC-MS/MS) 进行分析.
- 应用了深度学习工具 ModelAngelo 来从3D冷EM卷中进行 de novo 抗体测序.
主要成果:
- 证明了从冷EM重建中测序抗体可变域的可能性,准确度为80-90%.
- 表明ModelAngelo衍生序列可以协助分配V基因,从LC-MS/MS数据中改进新的组合.
- 强调了冷EM中的地图质量是测序准确性的关键因素.
结论:
- 结合的冷-EM和蛋白质组学方法为抗体谱的表征提供了一种可行的方法.
- 这种技术可以提高组装抗体序列和识别V基因的准确性.
- 进一步的发展有望对抗原特异性抗体库进行全面分析.
关键词:
抗体是一种抗体.冰冷化EMEM可以使用.标志性 标志性 标志性 标志性人类 人类 人类 人类 人类 人类 人类免疫学 免疫学 免疫学这是一种炎症炎症炎症炎症.分子生物物理学分子生物物理学这里是鼠标鼠标鼠标鼠标鼠标鼠标.蛋白质组学 蛋白质组学曲目 曲目 曲目 曲目rhesus 子 子 子 子 子结构生物学结构生物学更多相关视频
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