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单克隆抗体域的结构和动态使用旋转,散射和模拟

Veronika A Szalai¹, Christina Bergonzo^2,3, Rachel B Lyon²

¹Physical Measurement Laboratory, National Institute of Standards & Technology, Gaithersburg, MD, 20899, United States.

|January 13, 2025

概括

研究人员开发了一种测量抗体结构的新方法. 该技术使用标记蛋白和DEER光谱学来了解抗体动态,并改善生物药物开发.

科学领域:

生物化学生物化学
结构生物学结构生物学
生物技术是生物技术.

背景情况:

基于抗体的生物药物代表着一个占主导地位和不断增长的制药平台.
目前对抗体域间结构分布的理解有限,阻碍了创新.
准确的结构数据对于开发新型抗体疗法至关重要.

研究的目的:

开发和验证一种用于确定抗体生物分子结构合集的新方法.
解决单克隆抗体 (mAbs) 域间结构分布的知识差距.
为了同时确定基于mAb的生物的结构分布和动态.

主要方法:

利用标记蛋白质 (旋转标记亲和蛋白试剂 - SLAP) 的库来探测一个未标记的生物目标.
采用双电子-电子共振 (DEER) 光谱法来测量自旋间距离分布.
集成的分子模拟与DEER和溶液X射线散射测量.

主要成果:

成功确定了孤立的Fc域和完整的NISTmAb.Ab的SLAP复合体中的互旋距离分布.
证明了SLAP试剂对于免疫球蛋白G (IgG) 类mAbs.的一般适用性和可扩展性.
通过集成的计算和实验方法实现了结构分布和动态的同时确定.

结论:

开发的方法提供了一个强大的工具来表征抗体结构和动态.
这种方法可以显著推进基于抗体的药物的开发和创新.
SLAP试剂为治疗抗体的结构研究提供了一个多功能平台.

关键词:

双电子电子共振光谱学双电子电子共振光谱学生物制药产业的发展分子动力学分子动力学单克隆抗体生物制品生物制品溶液中的X射线散射.

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