Identification of odorant-binding and chemosensory protein genes and the ligand affinity of two of the encoded proteins suggest a complex olfactory perception system in Periplaneta americana
文献类型： 外文期刊
作者： He, P. 1 ; Li, Z. -Q. 2 ; Zhang, Y. -F. 3 ; Chen, L. 4 ; Wang, J. 1 ; Xu, L. 5 ; Zhang, Y. -N. 6 ; He, M. 1 ;
作者机构： 1.Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China
2.Chinese Acad Agr Sci, Tea Res Inst, Key Lab Tea Biol & Resource Utilizat, Minist Agr, Hangzhou, Zhejiang, Peoples R China
3.Minist Agr, Biogas Inst, Chengdu, Sichuan, Peoples R China
4.Guizhou Med Univ, High Educ Key Lab Guizhou Prov Nat Med Pharmacol, Guian, Guizhou, Peoples R China
5.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing, Jiangsu, Peoples R China
6.Huaibei Normal Univ, Coll Life Sci, Xiangshan Dist 235000, Huaibei, Peoples R China
关键词： American cockroach;odorant-binding protein;chemosensory protein;tissue expression pattern;odorant binding affinity
期刊名称：INSECT MOLECULAR BIOLOGY （ 影响因子：3.585； 五年影响因子：3.215 ）
ISSN： 0962-1075
年卷期： 2017 年 26 卷 6 期
页码：
收录情况： SCI
摘要： The American cockroach (Periplaneta americana) is an urban pest with a precise chemosensory system that helps it achieve complex physiological behaviours, including locating food and mating. However, its chemosensory mechanisms have not been well studied. Here, we identified 71 putative odorant carrier protein genes in P.americana, including 57 new odorant-binding proteins (OBPs) and 11 chemosensory proteins (CSPs). To identify their physiological functions, we investigated their tissue expression patterns in antennae, mouthparts, legs, and the remainder of the body of both sexes, and determined that most of these genes were expressed in chemosensory organs. A phylogenetic tree showed that the putative pheromone-binding proteins of P.americana were in different clades from those of moths. Two genes, PameOBP24 and PameCSP7, were expressed equally in antennae of both sexes and highly expressed amongst the OBPs and CSPs. These genes were expressed in Escherichia coli and the resultant proteins were purified. The binding affinities of 74 common odorant compounds were tested with recombinant PameOBP24 and PameCSP7. Both proteins bound a variety of ligands. Our findings provide a foundation for future research into the chemosensory mechanisms of P.americana and help in identifying potential target genes for managing this pest.
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