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Unique function of a chemosensory protein in the proboscis of two Helicoverpa species

Journal of experimental biology, 2014-05, Vol.217 (Pt 10), p.1821-1826 [Peer Reviewed Journal]

2014. Published by The Company of Biologists Ltd. ;ISSN: 0022-0949 ;EISSN: 1477-9145 ;DOI: 10.1242/jeb.102020 ;PMID: 24625642

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Title:
Unique function of a chemosensory protein in the proboscis of two Helicoverpa species
Author: Liu, Yu-Ling ; Guo, Hao ; Huang, Ling-Qiao ; Pelosi, Paolo ; Wang, Chen-Zhu
Subjects: Animals ; Carbohydrate Metabolism ; Female ; Insect Proteins - analysis ; Insect Proteins - metabolism ; Male ; Models, Molecular ; Moths - chemistry ; Moths - metabolism ; Pheromones - metabolism ; Protein Binding ; Receptors, Odorant - analysis ; Receptors, Odorant - metabolism ; Species Specificity ; Surface-Active Agents - analysis ; Surface-Active Agents - metabolism ; Terpenes - metabolism
Is Part Of: Journal of experimental biology, 2014-05, Vol.217 (Pt 10), p.1821-1826
Description: Chemosensory proteins (CSPs) are soluble proteins found only in arthropods. Some of them fill the lumen of chemosensilla and are believed to play a role similar to that of odorant-binding proteins in the detection of semiochemicals. Other members of the CSP family have been reported to perform different functions, from delivery of pheromones to development. This report is focused on a member (CSP4) of the family that is highly and almost exclusively present in the proboscis of two sibling noctuid species, Helicoverpa armigera and H. assulta. We expressed the protein in bacteria and measured binding to terpenoids and related compounds. Using specific antibodies, we found that when the moths suck on a sugar solution, CSP4 is partly extruded from the proboscis. A solution of protein can also fill a hydrophobic tube of same length and diameter as the proboscis by capillary action. On this basis, we suggest that CSP4 acts as a wetting agent to reduce the surface tension of aqueous solutions and consequently the pressure involved in sucking.
Publisher: England
Language: English
Identifier: ISSN: 0022-0949
EISSN: 1477-9145
DOI: 10.1242/jeb.102020
PMID: 24625642
Source: GFMER Free Medical Journals
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Unique function of a chemosensory protein in the proboscis of two Helicoverpa species

2014. Published by The Company of Biologists Ltd. ;ISSN: 0022-0949 ;EISSN: 1477-9145 ;DOI: 10.1242/jeb.102020 ;PMID: 24625642

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