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Chem Senses

Title:		Functional conservation of Anopheline linalool receptors through 100 million years of evolution
Author(s):		Huff RM; Pitts RJ;
Address:		"Department of Biology, Baylor University, Waco, TX 76706, USA"
Journal Title:		Chem Senses
Year:		2022
Volume:		47
Issue:
Page Number:		-
DOI:		10.1093/chemse/bjac032
ISSN/ISBN:		1464-3553 (Electronic) 0379-864X (Print) 0379-864X (Linking)
Abstract:		"Insects rely on olfactory receptors to detect and respond to diverse environmental chemical cues. Detection of semiochemicals by these receptors modulates insect behavior and has a direct impact on species fitness. Volatile organic compounds (VOCs) are released by animals and plants and can provide contextual cues that a blood meal host or nectar source is present. One such VOC is linalool, an enantiomeric monoterpene, that is emitted from plants and bacteria species. This compound exists in nature as one of two possible stereoisomers, (R)-(-)-linalool or (S)-(+)-linalool. In this study, we use a heterologous expression system to demonstrate differential responsiveness of a pair of Anopheline odorant receptors (Ors) to enantiomers of linalool. The mosquitoes Anopheles gambiae and Anopheles stephensi encode single copies of Or29 and Or53, which are expressed in the labella of An. gambiae. (S)-(+)-linalool activates Or29 orthologs with a higher potency than (R)-(-)-linalool, while the converse is observed for Or53 orthologs. The conservation of these receptors across a broad range of Anopheline species suggests they may function in the discrimination of linalool stereoisomers, thereby influencing the chemical ecology of mosquitoes. One potential application of this knowledge would be in the design of novel attractants or repellents to be used in integrated pest management practices"
Keywords:		"Animals Acyclic Monoterpenes Monoterpenes/pharmacology *Receptors, Odorant/genetics *Anopheles Anopheles chemical detection mosquito chemical ecology enantioselective odorant receptors floral odor detection malaria;"
Notes:		"MedlineHuff, Robert M Pitts, Ronald Jason eng R01 AI148300-01A1/NH/NIH HHS/ Research Support, N.I.H., Extramural England 2022/12/03 Chem Senses. 2022 Jan 1; 47:bjac032. doi: 10.1093/chemse/bjac032"