半合成体显示图书馆建设:生成单链可变片段二级图书馆
Juan C Almagro1, Mary Ann Pohl2
1GlobalBio, Inc., Cambridge, Massachusetts 02138, USA juan.c.almagro@globalbioinc.com.
Cold Spring Harbor protocols
|October 16, 2024
概括
这项研究详细介绍了使用菌体显示器创建治疗抗体发现库的最后一步. 该方法通过将天然重链CDR3区域纳入半合成库来增强抗体的多样性,以实现强大的抗体发现.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 体显示是识别抗体的关键技术.
- 在M13菌上显示的抗体片段有助于标结合的发现.
- 之前的步骤涉及到初级和过图书馆的建设.
研究的目的:
- 描述构建用于治疗性抗体发现 (ALTHEA) 图书馆的抗体图书馆的第三个也是最后一步.
- 在最后的图书馆建设阶段增强抗体多样性.
- 为治疗性抗体发现建立一个强大的平台.
主要方法:
- 来自过图书馆 (FLs) 的单链可变片段 (scFvs) 的核酸序列通过PCR被放大.
- 自然重链CDR3 (HCDR3) 和连接 (H3J) 片段从多样化的捐赠池中获得.
- 通过PCR放大scFvs与自然的H3J片段结合,取代FL中的中性H3J片段,以创建半合成的二次图书馆 (SL).
- 通过随机克隆测序来评估图书馆质量.
主要成果:
- 成功生成具有最大多样性的半合成二级库 (SLs).
- 嵌入自然H3J片段,捕捉超过95%的自然H3J曲目.
- 通过对随机选择的克隆进行测序来验证图书馆质量.
结论:
- 描述的方法代表了ALTHEA图书馆建设的最后一步.
- 由此产生的半合成二级库是强大的,并为菌体选择做好准备.
- 这种方法为治疗性抗体发现提供了一个强大的平台.
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