在Escherichia coli中的ABA特异性scFv的重组产量和结合特征上的分子伴侣效应
Shimiao Chen1,2,3, Bin Shan1,2, Yican Luo1
1Key Laboratory, Guangxi Subtropical Crops Research Institute, Nanning, China.
Frontiers in bioengineering and biotechnology
|October 27, 2025
概括
分子陪伴剂增强了E. coli中单链可变片段 (scFvs) 的酸 (ABA) 生产. 不同的陪伴剂产生ABA-scFvs,其灵敏度和特异性为农业应用量身定制.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 免疫化学 免疫化学
背景情况:
- 重组单链可变片段 (scFvs) 提供可扩展的抗体生产.
- 错误折叠和聚合限制了大肠杆菌中可溶性scFv的表达,特别是对于像酸 (ABA) 这样的小分子标.
- 分子伴侣的共同表达可以提高scFvs的折叠效率和功能产量.
研究的目的:
- 研究不同分子伴侣系统对大肠杆菌中ABA特异性scFv的可溶性表达和功能性能的影响.
- 确定伴侣辅助折叠如何影响ABA-scFvs. 的结构完整性和结合特性.
- 为制定针对农业生物技术量身定制的ABA免疫试验奠定基础.
主要方法:
- 在大肠杆菌BL21(DE3) 中表达一种ABA特异性scFv,使用五种不同的护卫体质粒 (pG-KJE8,pGro7,pKJE7,pG-Tf2和pTf16).
- 通过His-tag ELISA量化可溶性scFv表达;使用SDS-PAGE和西方 blot.确认蛋白质身份.
- 通过竞争式ELISA (IC50,特异性) 和结构分析 (FT-IR,循环二极化谱学) 进行功能性表征.
主要成果:
- 与对照组 (14.20%) 相比,触发因子 (pTf16) 显著增加了可溶性scFv产量 (19.65%).
- pKJE7系统产生了最高的灵敏度 (最低的IC50),而pTf16系统显示出更高的特异性和更广泛的检测范围.
- 结构分析表明,pKJE7辅助的scFv折叠与高灵敏度相关,而pTf16辅助的scFv折叠通过避免非原生结构来增强特异性.
结论:
- 分子伴侣选择极大地影响了表达在大肠杆菌中的ABA-scFvs的结构忠实性和功能性能.
- pKJE7促进高灵敏度,而pTf16产生高度特异性和结构稳定的抗体.
- 这些发现为开发具有成本效益的ABA免疫测试提供了实际框架,并为农业生物技术定制了性能.
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