Targeting Design of Human Anti-idiotypic Genetically Engineered Antibody for Simulating the Structure and Insecticidal Function of Bt Cry1C Toxin

文献类型： 外文期刊

第一作者： Xu, Chongxin

作者： Xu, Chongxin;Shen, Jianxing;Chen, Wei;Sun, Xiaoming;Zhang, Xiao;Liu, Yuan;Liu, Xianjin;Xu, Chongxin;Shen, Jianxing

作者机构：

关键词： Bt Cry1C toxin; phage displayed antibody library; anti-idiotypic antibody; antibody mutagenesis library; insecticidal protein; enzyme-linked immunosorbent assay

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2024 年 72 卷 39 期

页码：

收录情况： SCI

摘要： The beta-type anti-Id (Ab2 beta) is considered to have potential for simulating the structure and function of the antigen. In this study, a beta-type anti-Id (3A7 anti-I-GEAb) of the Cry1C toxin was captured from a GEAb library. Subsequently, a higher activity of mutant (3A7 mutant 8) was obtained from the mutagenesis library based on 3A7 anti-I-GEAb. The LD50 values of 3A7 anti-I-GEAb and 3A7 mutant 8 reach up to 38.9% and 46.8% of Cry1C toxin for P. xylostella and reach up to 32.9% and 37.4% of Cry1C toxin for H. armigera. Additionally, an IC-ELISA was established based on 3A7 mutant 8 (as the coated "antigen"), with an LOD value of 0.35 ng/mL, exhibiting good accuracy and stability for detecting Cry1C toxin in spiked samples. The present beta-type anti-I-GEAb not only exhibits insecticidal activity similar to Cry1C toxin, offering potential for environmentally friendly pest management, but it can also replace the Cry1C toxin structure to establish a highly sensitive and specific IC-ELISA for monitoring Cry1C toxin.

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