Ligand-binding properties of three odorant-binding proteins of the diamondback moth Plutella xylostella
| Autor: | Hai-bin Yuan, Ke-jian Lin, Yang Liu, Paolo Pelosi, Guirong Wang, Jiao Zhu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Odorant binding Agriculture (General) media_common.quotation_subject odorant-binding protein Plant Science Olfaction Insect tryptophan quenchin Biochemistry S1-972 03 medical and health sciences chemistry.chemical_compound Food Animals Botany media_common chemistry.chemical_classification Diamondback moth Ecology biology fungi Plutella molecular docking biology.organism_classification Amino acid 030104 developmental biology chemistry Coniferyl aldehyde Odorant-binding protein biology.protein Animal Science and Zoology Agronomy and Crop Science Plutella xylostella ligand-binding Food Science |
| Zdroj: | Journal of Integrative Agriculture, Vol 15, Iss 3, Pp 580-590 (2016) |
| ISSN: | 2095-3119 |
| DOI: | 10.1016/s2095-3119(15)61067-x |
| Popis: | Strategies for insect population control are currently targeting chemical communication at the molecular level. The diamondback moth Plutella xylostella represents one of the most serious pests in agriculture, however detailed information on the proteins mediating olfaction in this species is still poor. This species is endowed with a repertoire of a large number of olfactory receptors and odorant binding proteins (OBPs). As a contribution to map the specificities of these chemical sensors in the moth and eventually unravel the complexity of chemodetection, we have measured the affinities of three selected OBPs to a series of potential odorants. Three proteins are highly divergent in their amino acid sequences and show markedly different expression profiles. In fact, PxylOBP3 is exclusively expressed in the antennae of both sexes, PxylOBP9 is male specific and present only in antennae and reproductive organs, while PxylOBP19, an unusual OBP with nine cysteines, is ubiquitously present in all the organs examined. Such expression pattern suggests that the last two proteins may be involved in non-chemosensory functions. Despite such differences, the three OBPs exhibit similar binding spectra, together with high selectivity. Among the 26 natural compounds tested, only two proved to be good ligands, retinol and coniferyl aldehyde. This second compound is particularly interesting being part of the chemical pathway leading to regeneration of lignin, one of the defense strategies of the plant against insect attack, and might find applications as a repellent for P. xylostella and other pests. |
| Databáze: | OpenAIRE |
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