İlkay Koçer1,2, Eda Çelik1,3
1Department of Chemical Engineering, Hacettepe University, Ankara, Turkey.
Journal of biomolecular structure & dynamics
|June 8, 2023
概括
计算机模拟显示,单链可变片段 (scFv) 抗体中的域顺序会影响结合亲和力. 这项研究指导了用于诊断和治疗的改进scFv抗体的设计.
科学领域:
- 生物技术是生物技术.
- 计算生物学 计算生物学
- 免疫学 免疫学 免疫学
背景情况:
- 单链可变片段 (scFv) 抗体对诊断和治疗,特别是癌症具有前景.
- 优化scFv表达,可溶性和亲和度需要战略设计,变量域顺序是关键因素.
- 理想的VL-VH域定向可以在不同的scFvs.
研究的目的:
- 通过计算评估可变域定向如何影响scFv结构,稳定性和抗原结合亲和力.
- 研究VL-VH顺序对抗HER2和抗IL-1β scFv抗原相互作用的影响.
- 为设计用于生物技术应用的高亲和度scFvs提供预测框架.
主要方法:
- 使用了计算机模拟,包括100 ns的分子动力学 (MD) 模拟.
- 采用分子力学-普森-博尔兹曼表面积 (MM-PBSA) 方法来计算结合的自由能量.
- 模拟了具有不同域定向 (VL-VH和VH-VL) 的抗HER2 scFv和抗IL-1β scFv结构.
主要成果:
- MD模拟证实了两个scFv结构的稳定性和紧性.
- 抗HER2 scFv结构 (VL-VH和VH-VL) 与HER2具有类似的结合亲和力.
- 反IL-1β scFv的VH-VL方向显示出更有利的结合自由能量,这表明对IL-1β的亲和力更高.
结论:
- 可变域定向是影响scFv结合亲和力的关键参数.
- VH-VL方向可能会增强对某些scFvs的结合亲和力,例如抗IL-1β.
- 在 silico 方法可以有效地指导实验设计,以开发有针对性的基于 scFv 的生物技术.
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