组装的主要猫类过敏原Feld d 1的人工智能驱动的设计,以改善其空间折叠和IgE反应性
Wei Zheng1, Yi-Fei Xu1, Zhi-Ming Hu1
1Department of Pharmacy, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, China.
International immunopharmacology
|January 7, 2024
概括
研究人员使用人工智能创建了一个优化的Feld1,一个主要的猫类过敏原. 这种改进版本显示了增强的免疫球蛋白E (IgE) 结合,简化了其用于诊断猫过敏的使用.
科学领域:
- 生物技术是生物技术.
- 过敏原研究研究
- 结构生物学是结构生物学.
背景情况:
- 猫的过敏原,特别是Feld 1,是全球过敏疾病的普遍原因.
- 与组装的分子相比,Feld1的单个链显示出免疫球蛋白E (IgE) 的反应性降低.
- 这种局限性阻碍了Feld1在分子过敏诊断中的有效准备和应用.
研究的目的:
- 优化Feld 1的结构,以提高IgE反应性和简化制备.
- 利用人工智能 (AI) 来设计一个更有效的过敏原用于诊断目的.
主要方法:
- 利用AlphaFold2 (AI) 来模拟Feld 1的3D结构,使用各种链间连接模式.
- 在大肠杆菌中表达了优化的Fel d 1结构,评估可溶性蛋白质产量.
- 使用循环二元化 (CD),HPLC-SEC和SDS-PAGE进行了蛋白质折叠和二元化的特征.
- 通过ELISA评估了优化融合Fel d 1的特定IgE反应性.
主要成果:
- 2 × GGGGS连接器获得了最高的质量评分 (100) 和最小的连接错误.
- 与其他结构相比,优化聚变Feld d 1显示出更高的可溶性蛋白质比例.
- CD和HPLC-SEC证实了一致的折叠和二元化,类似于本地类似结构.
- 埃利萨检测显示,对优化融合 Fel d 1 的IgE结合吸收率有显著的改善.
结论:
- 一个人工智能驱动的设计策略成功优化了Feld d 1,使其能够自发地像原生一样折叠.
- 优化的Feld1表现出增强的IgE结合活性和简化的制备过程.
- 这种强大的过敏原材料非常适合推进猫过敏的分子诊断.
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