对抗Bacillus thuringiensis植物性杀虫蛋白的一种新型单链变量片段的构建和表征
Na Luo1, Wei Chen2, Jiafeng Jin2
1Provincial Key Construction Laboratory of Probiotics Preparation, Huaiyin Institute of Technology, Huaian, 223003, China; Jiangsu Key Laboratory for Food Quality, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China.
International journal of biological macromolecules
|September 16, 2025
概括
研究人员开发了一种新的检测方法Bacillus thuringiensis (Bt) 植物杀虫蛋白3Aa (Vip3Aa) 使用单链可变片段 (scFv). 这种具有成本效益的测定对于确保食品安全和监测转基因作物至关重要.
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:
- 细菌 thuringiensis (Bt) 植物杀虫蛋白3Aa (Vip3Aa) 对于控制转基因作物中的虫害是必不可少的.
- 准确的Vip3Aa检测方法对于食品安全和环境监测至关重要.
- 目前的检测方法可能昂贵或缺乏特异性.
研究的目的:
- 构建和表达一个单链变量片段 (scFv) 对Vip3Aa.
- 开发一个敏感和特定的三明治ELISA用于Vip3Aa检测.
- 评估基于scFv的基因转基因作物的检测潜力.
主要方法:
- 针对Vip3Aa的杂交瘤细胞系被用来构建一个scFv基因.
- 该scFv基因被克隆,表达在大肠杆菌中,并被净化.
- 进行了分子对接,以分析scFv-Vip3Aa相互作用.
- 使用纯化的scFv和抗Vip3Aa多克隆抗体 (pAbs) 开发了一个三明治ELISA.
主要成果:
- 功能性scFv表达的产量为1.3 mg/L.
- 分子对接确定了scFv和Vip3Aa之间的关键结合表位和相互作用.
- 三明治ELISA显示检测极限 (LOD) 为0.12μg/mL,量化极限 (LOQ) 为0.50μg/mL.
- 该试验没有显示与转基因作物中发现的其他常见杀虫蛋白的交叉反应.
结论:
- 开发的scFv是转基因作物中Vip3Aa检测的一个有前途的工具.
- 这种基于scFv的ELISA为单克隆抗体方法提供了潜在的成本有效的替代方案.
- 这项研究为未来的抗体设计提供了对抗体-抗原相互作用的宝贵见解.
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