Journal
CHEMICAL SENSES
Volume 29, Issue 5, Pages 403-410Publisher
OXFORD UNIV PRESS
DOI: 10.1093/chemse/bjh041
Keywords
host preference; mosquito; olfaction; receptor; vector
Funding
- NIAID NIH HHS [R01 AI056402-02, R01 AI056402, R01 AI056402-01, AI56402] Funding Source: Medline
- NIDCD NIH HHS [R01 DC004692, DC04692] Funding Source: Medline
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Aedes aegypti is a highly anthropophilic mosquito responsible for the transmission of dengue and yellow fever around the world. Like other mosquitoes, the biting and host preference behaviors of this disease vector are largely influenced by its sense of smell, which is presumably facilitated by G protein-coupled receptor signaling cascades. Here, we report the identification and characterization of AaOr7, the first candidate odorant receptor from Ae. aegypti. This receptor displays extremely high primary amino acid conservation with AgOr7 another candidate odorant receptor identified in the Aftrotropical malaria vector, Anopheles gambiae as well as several previously identified candidate odorant receptors in Drosophila melanogaster and other insects. Its transcript is expressed in adult chemosensory tissues and during several stages of Ae. aegypti development. Within the adult olfactory system, AaOr7 protein is found specifically within most antennal and maxillary palp sensilla, as well as in a subset of proboscis sensilla. These results are consistent with a role for AaOr7 in olfaction and gustation supporting the hypothesis that AaOr7 and its orthologs may be of general importance to chemosensory processes throughout the lifetime of an insect.
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