P. Sengupta et al., ODR-10 ENCODES A 7 TRANSMEMBRANE DOMAIN OLFACTORY RECEPTOR REQUIRED FOR RESPONSES TO THE ODORANT DIACETYL, Cell, 84(6), 1996, pp. 899-909
Olfactory signaling is initiated by interactions between odorants and
olfactory receptors. We show that the C. elegans odr-10 gene is likely
to encode a receptor for the odorant diacetyl. odr-10 mutants have a
specific defect in chemotaxis to diacetyl, one of several odorants det
ected by the AWA olfactory neurons. odr-10 encodes a predicted seven t
ransmembrane domain receptor; a green fluorescent protein-tagged Odr-1
0 protein is localized to the AWA sensory cilia. odr-10 expression is
regulated by odr-7, a transcription factor implicated in AWA sensory s
pecification. Expression of odr-10 from a heterologous promoter direct
s behavioral responses to diacetyl, but not to another odorant detecte
d by the AWA neurons. These results provide functional evidence for a
specific interaction between an olfactory receptor protein and its odo
rant ligand.