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Molecular and Binding Characteristics of OBP5 of Bradysia odoriphaga (Diptera: Sciaridae)

文献类型： 外文期刊

作者： Yang Yuting 1 ; Hua Dengke 1 ; Shi Caihua 1 ; Xie Wen 2 ; Zhang Youjun 2 ;

作者机构： 1.Yangtze Univ, Coll Agr, Inst Insect Sci, Jingzhou 434025, Hubei, Peoples R China

2.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Dept Plant Protect, Beijing 100081, Peoples R China

关键词： Bradysia odoriphaga; odorant-binding protein; competitive binding assay; homology modeling; molecular docking

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

ISSN： 0022-0493

年卷期： 2021 年 114 卷 4 期

页码：

收录情况： SCI

摘要： Odorant-binding proteins (OBPs) capture and transport semiochemicals to olfactory receptors (OR) and function in the first step in insect olfaction. In the present study, we cloned a full-length cDNA sequence of BodoOBP5 from the insect pest Bradysia odoriphaga (Diptera: Sciaridae). Real-time PCR (qRT-PCR) analysis revealed that BodoOBP5 was expressed at higher levels in female adults than in other developmental stages. In the different tissues, BodoOBP5 was highly expressed in the female antennae, whereas low levels were expressed in the head and the male antennae, expression was negligible in other tissues. The recombinant protein of BodoOBP5 was successfully expressed with a bacterial system. Competitive binding assays with nine host plant volatiles and a putative sex pheromone revealed that purified BodoOBP5 strongly bound to two sulfur compounds (methyl allyl disulfide and diallyl disulfide); the corresponding dissolution constants (Ki) were 10.38 and 9.23 mu M, respectively. Molecular docking indicated that Leu99, Leu103, Ala143, Tyr107, Phe142, and Trp144 in the hydrophobic cavity of BodoOBP5 are the key residues mediating the interaction of BodoOBP5 with methyl allyl disulfide and diallyl disulfide. RNAi-based Y-tube olfactometer assay indicated that there is no significant difference in methyl allyl disulfide and diallyl disulfide. The results of this study increase our understanding of the binding of BodoOBP5 with plant volatiles, facilitating the development of novel ways to control B. odoriphaga.

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[1]Function and Characterization Analysis of BodoOBP8 from Bradysia odoriphaga (Diptera: Sciaridae) in the Recognition of Plant Volatiles and Sex Pheromones. Yang, Yuting,Luo, Liang,Zhao, Changwei,Niu, Hongli,Hu, Yifeng,Shi, Caihua,Tian, Lixia,Xie, Wen,Zhang, Youjun. 2021

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