单域抗体的物种依赖性结构变异
Marta Baselga1, Javier Sánchez-Prieto1, Víctor Manuel Medina Pérez1
1Institute for Health Research Aragon (IIS Aragón), 50009 Zaragoza, Spain.
Antibodies (Basel, Switzerland)
|December 24, 2025
概括
来自各种驼动物的单域抗体 (sdAbs) 显示保存的框架但可变的循环,影响工程. MO-IISA数据库捕获了这些特定物种的适应性,以改进抗体设计.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- 单域抗体 (sdAbs) 来自驼类重链抗体 (HCAb).
- sdAbs提供了小尺寸,高稳定性和易于生产等优点,使其对生物医学研究和治疗有价值.
- 虽然有大量的sdAb结构记录,但对物种依赖的结构变异的全面分析是有限的.
研究的目的:
- 评估单域抗体 (sdAbs) 的物种依赖性结构差异.
- 创建一个具有已知的抗原标的sdAbs的全面,开放的数据库.
主要方法:
- 通过整合六个公共资源 (iCAN,INDI,SAbDab-nano,sdAb-DB,PLabDab-nano,NbThermo) 组装了一个开放访问数据库MO-IISA.
- 应用了统一的资格标准来包含数据.
- 2053 sdAbs. 的量化区域长度,氨基酸频率和跨框架 (FR1-FR4) 的保存/.
主要成果:
- 数据集包括来自驼 (n=1316),驼 (n=325),驼 (n=377) 和巴克特里亚驼 (n=35) 的 2053 sdAbs.
- 平均 sdAb 长度为 ~124 个氨基酸,具有微小的物种间变化.
- 框架区域 (FRs) 保持高度保护,而CDR2和CDR3表现出最多的物种间和物种内部变异性. 在FR3和FR2中发现了氨酸的丰富,在FR1和FR3中发现了半氨酸,在巴克特里亚和龙驼类SDAbs中发现的非正规半氨酸更频繁.
结论:
- 框架区域显示物种中立的约束,而循环区域显示物种调节的适应.
- 这些结构特征对sdAb工程,物种选择和结合策略具有实际意义.
- MO-IISA数据库为在sdAbs.中探索这些特定物种特征提供了宝贵的资源.
关键词:
巴克特里亚的驼.这就是VHHs.阿尔帕卡斯 (Alpacas) 是一个鱼类.我们的数据库数据库数据库数据库.驼驼驼驼驼驼驼驼驼驼驼驼拉玛斯·拉玛斯 (Lamas Lamas) 是一个叫做拉玛斯 (Lamas Lamas) 的城市.纳米体是一个纳米体.一个单域抗体碎片.这种物种依赖性取决于物种.更多相关视频
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