Novel odorant-binding proteins and their expression patterns in grasshopper, Oedaleus asiaticus

Biochemical and Biophysical Research Communications
Shuo ZhangLong Zhang

Abstract

Insects use olfaction to detect exogenous odors and adapt to environments. In their olfaction systems, odorant-binding proteins (OBPs) are believed to be a key component. The unique OBP system of each species reflects the evolution of chemosensation of insects with habits. Here, we for the first time identified 15 OBPs, OasiOBP1-15, of a grasshopper, Oedaleus asiaticus, that lives in the grasslands of Northern China and is closely related to the locust, Locusta migratoria. OasiOBP9 and OasiOBP10 are specifically expressed in the antennae. Other OBPs are expressed in the antennae as well as other chemosensory organs, such as the mouthparts and wings. Significantly more OasiOBP7 was detected in male than female antennae, but there are 9 OBPs that were more expressed in female than male antennae by quantitative real-time PCR. Phylogenetic analysis indicated that most of the O. asiaticus OBPs are similar to those of L. migratoria, but some are substantially different. This indicates that the OBPs originally evolved in a common ancestor, but their unique chemosensory systems are adapted to different ecosystems.

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Citations

Jun 3, 2017·Oncotarget·Hao-Dong FeiFeng Ji
Dec 20, 2019·Journal of Chemical Ecology·Yuan-Tao ZhouBao-Ping Pang

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