title: Chemosensillum immunolocalization and ligand specificity of chemosensory proteins in the alfalfa plant bug Adelphocoris lineolatus (Goeze).
abstract: Insect chemosensory proteins (CSPs) are a family of small soluble proteins. To date, their physiological functions in insect olfaction remain largely controversial in comparison to odorant binding proteins (OBPs). In present study, we reported the antenna specific expression of three CSPs (AlinCSP4-6) from Adelphocoris lineolatus, their distinct chemosensillum distribution as well as ligand binding capability thus providing the evidence for the possible roles that they could play in semiochemical detection of the plant bug A. lineolatus. The results of qRT-PCR and western blot assay clearly showed that all of these three CSPs are highly expressed in the adult antennae, the olfactory organ of insects. Further cellular investigation of their immunolocalization revealed their dynamic protein expression profiles among different types of antennal sensilla. In a fluorescence competitive binding assay, the selective ligand binding was observed for AlinCSP4-6. In ad`dition, a cooperative interaction was observed between two co-expressed CSPs resulting in an increase of the binding affinities by a mixture of AlinCSP5 and AlinCSP6 to terpenoids which do not bind to individual CSPs. These findings in combination with our previous data for AlinCSP1-3 indicate a possible functional differentiation of CSPs in the A. lineolatus olfactory system.
authors: 1] State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China [2] Key Laboratory of Tea Plants Biology and Resources Utilization of Agriculture Ministry, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China [3] Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
authors: Liang
authors: L
authors: Sun
authors: Department of Biological Chemistry and Crop Protection, Rothamsted Research, Harpenden, AL5 2JQ, UK.
authors: Jing-Jiang
authors: JJ
authors: Zhou
authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
authors: Shao-Hua
authors: SH
authors: Gu
authors: 1] State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China [2] Institute of Entomology, Jiangxi Agricultural University, Nanchang, 330045, China.
authors: Hai-Jun
authors: HJ
authors: Xiao
authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
authors: Yu-Yuan
authors: YY
authors: Guo
authors: Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
authors: Ze-Wen
authors: ZW
authors: Liu
authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
authors: Yong-Jun
authors: YJ
authors: Zhang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D057506:Arthropod Antennae / Q000378:metabolism / Q000473:pathology; D003001:Cloning, Molecular; D005260:Female; D020062:Heteroptera / Q000378:metabolism*; D055767:Immobilized Proteins / Q000737:chemistry / Q000378:metabolism; D007150:Immunohistochemistry; D019476:Insect Proteins / Q000235:genetics / Q000378:metabolism*; D008024:Ligands; D008297:Male; D000455:Medicago sativa / Q000469:parasitology; D008969:Molecular Sequence Data; D010675:Pheromones / Q000737:chemistry / Q000378:metabolism; D011485:Protein Binding; D018035:Receptors, Odorant / Q000235:genetics / Q000378:metabolism*; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000302:isolation & purification; D058618:Sensilla / Q000378:metabolism*; D016415:Sequence Alignment
chemical_list: D055767:Immobilized Proteins; D019476:Insect Proteins; D008024:Ligands; D010675:Pheromones; D018035:Receptors, Odorant; D011994:Recombinant Proteins; C045648:odorant-binding protein
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