期刊
INSECT MOLECULAR BIOLOGY
卷 26, 期 6, 页码 687-701出版社
WILEY
DOI: 10.1111/imb.12328
关键词
American cockroach; odorant-binding protein; chemosensory protein; tissue expression pattern; odorant binding affinity
资金
- National Natural Science Foundation of China [31360528, 31401750]
- Natural Science Foundation of Guizhou Province of China [QKH-J [2014]2062]
- Scientific Research Foundation of Guizhou University of China [2013-28]
- Natural Science Foundation of China [31501647]
- Major Program of Innovation Research Team of Educational Commission of Guizhou Province of China [QJH-KY[2016]113]
- Science and Technology Platform for Talent of Guizhou Province [QKH [2016]5608]
- Science and Technology Project of Guizhou Province [QKH (2012) 6012]
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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