Identification and quantitative analysis of genes encoding odorant binding proteins in Aedes albopictus (Diptera: Culicidae).

Odorant binding proteins (OBPs) play a critical role in mediating mosquito behaviors. In the current study, four AealOBP genes were cloned and sequenced. Basic Local Alignment Search Tool Program and phylogenetic analysis of the deduced amino acid sequences identified a unique putative ortholog in Aedes aegypti (L.) for each Aedes albopictus (Skuse) OBP. Quantitative analysis showed some AealOBPs with a strong female/male expression ratio, which we proposed to be involved in the host seeking of female mosquitoes. Other OBPs are expressed at higher levels in male antennae and are considered candidates for the detection of floral volatiles. The current study provides basis for further detailed molecular characterization of Ae. albopictus olfactory systems.