Mutation V65I in the β1 Subunit of the Nicotinic Acetylcholine Receptor Confers Neonicotinoid and Sulfoxaflor Resistance in Insects

文献类型： 外文期刊

第一作者： Zhang, Kun

作者： Zhang, Kun;Chen, Longwei;Chen, Jianwen;Huang, Huixiu;Liu, Kaiyang;Zhang, Yi;Wu, Shaoying;Zhang, Kun;Chen, Longwei;Chen, Jianwen;Huang, Huixiu;Liu, Kaiyang;Zhang, Yi;Wu, Shaoying;Yang, Jingfang;Yang, Jingfang

作者机构：

关键词： Megalurothrips usitatus; nicotinicacetylcholine receptor; insecticide resistance; electrophysiology; computer modeling

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.1； 五年影响因子：6.3 ）

ISSN： 0021-8561

年卷期： 2024 年 72 卷 11 期

页码：

收录情况： SCI

摘要： Neonicotinoids have been widely used to control pests with remarkable effectiveness. Excessive insecticides have led to serious insect resistance. Mutations of the nicotinic acetylcholine receptor (nAChR) are one of the reasons for neonicotinoid resistance conferred in various agricultural pests. Two mutations, V65I and V104I, were found in the nAChR beta 1 subunit of two neonicotinoid-resistant aphid populations. However, the specific functions of the two mutations remain unclear. In this study, we cloned and identified four nAChR subunits (alpha 1, alpha 2, alpha 8, and beta 1) of thrips and found them to be highly homologous to the nAChR subunits of other insects. Subsequently, we successfully expressed two subtypes nAChR (alpha 1/alpha 2/alpha 8/beta 1 and alpha 1/alpha 8/beta 1) by coinjecting three cofactors for the first time in thrips, and alpha 1/alpha 8/beta 1 showed abundant current rapidly. Acetylcholine, neonicotinoids, and sulfoxaflor exhibited different activation capacities for the two subtypes of nAChRs. Finally, V65I was found to significantly reduce the binding ability of nAChR to neonicotinoids and sulfoxaflor through electrophysiology and computer simulations. V104I caused a decrease in agonist affinity (pEC(50)) but an increase in the efficacy (I-max) of nAChR against neonicotinoids and reduced the binding ability of nAChR to sulfoxaflor. This study provides theoretical and technical support for studying the molecular mechanisms of neonicotinoid resistance in pests.

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