Genome-wide investigation of the OR gene family in Helicoverpa armigera and functional analysis of OR48 and OR75 in metamorphosis development
文献类型： 外文期刊
作者： Li, Yanli 1 ; Chai, Qichao 1 ; Chen, Ying 2 ; Ma, Yujia 3 ; Wang, Yongcui 1 ; Zhao, Junsheng 1 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Ind Crops, Jinan 250100, Shandong, Peoples R China
2.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Shandong, Peoples R China
3.Shandong Normal Univ, Coll Life Sci, Jinan 250300, Shandong, Peoples R China
关键词： Odorant receptors; 20-Hydroxyecdysone (20E); Insulin; Phylogeny; Functional analysis; Helicoverpa armigera
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：7.7； 五年影响因子：7.7 ）
ISSN： 0141-8130
年卷期： 2024 年 278 卷
页码：
收录情况： SCI
摘要： The cotton bollworm, Helicoverpa armigera, is a significant global agricultural pest, particularly detrimental during its larval feeding period. Insects' odorant receptors (ORs) are crucial for their crop-feeding activities, yet a comprehensive analysis of H. armigera ORs has been lacking, and the influence of hormones on ORs remain understudied. Herein, we conducted a genome-wide study and identified 81 ORs, categorized into 15 distinct groups. Analyses of protein motifs and gene structures revealed both conservation within groups and divergence among them. Comparative gene duplication analysis between H. armigera and Bombyx mori highlighted different duplication patterns. We further investigated subcellular localization and protein interactions within the odorant receptor family, providing valuable insights for future functional and interaction studies of ORs. Specifically, we identified that OR48 and OR75 were abundantly expressed during molting/metamorphosis and feeding stages, respectively. We demonstrated that 20E induced the upregulation of OR48 via EcR, while insulin upregulated OR75 expression through InR. Moreover, 20E induced the translocation of OR48 to the cell membrane, mediating its effects. Functional studies involving the knockdown of OR48 and OR75 revealed their roles in metamorphosis development, with OR48 knockdown resulting in delayed pupation and OR75 knockdown leading to premature pupation. OR48 can promote autophagy and apoptosis in fat body, while OR75 can significantly inhibit apoptosis and autophagy. These findings significantly contribute to our understanding of OR function in H. armigera and shed light on potential avenues for pest control strategies.
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