Genome-wide identification and phylogenetic analysis of the tetraspanin gene family in lepidopteran insects and expression profiling analysis in Helicoverpa armigera  

作　　者：Chenyang Wang Yinuo Zhang Fang Guan Ya-Zhou He Yidong Wu 

机构地区：[1]College of Plant Protection,Nanjing Agricultural University,Nanjing,210095 China

出　　处：《Insect Science》2025年第2期471-486,共16页昆虫科学(英文版)

基　　金：funded by the Natural Science Foundation of Jiangsu Province of China(grant no.BK20230983).

摘　　要：The tetraspanin gene family encodes cell-surface proteins that span the membrane 4 times and play critical roles in a wide range of biological processes across numerous organisms.Recent findings highlight the involvement of a tetraspanin of the lepidopteran pest Helicoverpa armigera in resistance to Bacillus thuringiensis Cry insecticidal proteins,which are extensively used in transgenic crops.Thus,a better understanding of lepidopteran tetraspanins is urgently needed.In the current study,genome scanning in 10 lepidopteran species identified a total of 283 sequences encoding potential tetraspanins.Based on conserved cysteine patterns in the large extracellular loop and their phylogenetic relationships,these tetraspanins were classified into 8 subfamilies(TspA to TspH).Six ancestral introns were identified within lepidopteran tetraspanin genes.Tetraspanins in TspA,TspB,TspC,and TspD subfamilies exhibit highly similar gene organization,while tetraspanins in the remaining 4 subfamilies exhibited variation in intron loss and/or gain during evolution.Analysis of chromosomal distribution revealed a lepidopteran-specific cluster of 10 to 11 tetraspanins,likely formed by tandem duplication events.Selective pressure analysis indicated negative selection across all orthologous groups,withωvalues ranging between 0.004 and 0.362.However,positive selection was identified at 18 sites within TspB5,TspC5,TspE3,and TspF10.Furthermore,spatiotemporal expression analysis of H.armigera tetraspanins demonstrated variable expression levels across different developmental stages and tissues,suggesting diverse functions of tetraspanin members in this globally important insect pest.Our findings establish a solid foundation for subsequent functional investigations of tetraspanins in lepidopteran species.

关 键 词：classification expression pattern Helicoverpa armigera LEPIDOPTERA PHYLOGENETICS TETRASPANIN 

分 类 号：Q96[生物学—昆虫学]