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新的合成和结构释CDR-H3循环模拟模仿

Guangkuan Zhao¹, Alexis D Richaud¹, R Thomas Williamson²

¹Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States.

ACS chemical biology

|June 25, 2024

概括

抗体互补性决定区域 (CDR) 能够进行抗原结合. 这项研究表明,凸起的CDR-H3结构充当了分子链,保存的托残留物稳定了它们在药物设计中独特的构造.

科学领域:

结构生物学结构生物学
免疫学免疫学免疫学
生物化学生物化学

背景情况:

抗体结合亲和性和特异性依赖于互补性决定区域 (CDR).
重链3 CDRs (CDR-H3s) 对抗体-抗原相互作用至关重要.
CDR-H3适应性的结构决定因素在很大程度上是未知的.

研究的目的:

研究CDR-H3循环适应性的结构基础.
了解CDR-H3如何适应不同的序列,长度和非正规结构.

主要方法:

新生合成的膨胀CDR-H3模仿.
循环二重化 (CD) 和核磁共振 (NMR) 光谱学.
独立β-hairpin支架的结构分析.

主要成果:

合成的CDR-H3模仿物在水中形成了稳定的,折叠良好的β-hairpin支架.
这些模仿者保留了本地CDR-H3的凸起特征.
保存的托残留物通过键和CH/π相互作用稳定β-凸基.
核磁共振 (NMR) 数据表明,在膨胀基部存在动态残留物,这表明链功能.

结论:

凸起的CDR-H3s充当分子链,将刚性茎连接到灵活的循环.
保存的托芬残留物在稳定CDR-H3结构方面发挥着关键作用.
这种结构洞察力可以为抗体药物设计和新疗法的工程提供信息.

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