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Sci Rep 2015 Jan 12;5:13935. doi: 10.1038/srep13935.
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Different expression domains for two closely related amphibian TAARs generate a bimodal distribution similar to neuronal responses to amine odors.

Syed AS , Sansone A , Röner S , Bozorg Nia S , Manzini I , Korsching SI .

Olfactory perception is mediated by a multitude of olfactory receptors, whose expression in the sensory surface, the olfactory epithelium, is spatially regulated. A common theme is the segregation of different olfactory receptors in different expression domains, which in turn leads to corresponding segregation in the neuronal responses to different odor groups. The amphibian olfactory receptor gene family of trace amine associated receptors, in short TAARs, is exceedingly small and allows a comprehensive analysis of spatial expression patterns, as well as a comparison with neuronal responses to the expected ligands for this receptor family, amines. Here we report that TAAR4b exhibits a spatial expression pattern characteristically different in two dimensions from that of TAAR4a, its close homolog. Together, these two genes result in a bimodal distribution resembling that of amine responses as visualized by calcium imaging. A stringent quantitative analysis suggests the involvement of additional olfactory receptors in amphibian responses to amine odors.

PubMed ID: 26358883
PMC ID: PMC4566120
Article link: Sci Rep

Species referenced: Xenopus
Genes referenced: omp taar1 taar2 taar3 trpc2

Article Images: [+] show captions
References [+] :
Buck, Olfactory receptors and odor coding in mammals. 2004, Pubmed