Candidate taste receptors in Drosophila |
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Authors: | Clyne P J Warr C G Carlson J R |
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Institution: | Department of Molecular, Cellular, and Developmental Biology, Yale University, Post Office Box 208103, New Haven, CT 06520-8103, USA. |
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Abstract: | Little is known about the molecular mechanisms of taste perception in animals, particularly the initial events of taste signaling. A large and diverse family of seven transmembrane domain proteins was identified from the Drosophila genome database with a computer algorithm that identifies proteins on the basis of structure. Eighteen of 19 genes examined were expressed in the Drosophila labellum, a gustatory organ of the proboscis. Expression was not detected in a variety of other tissues. The genes were not expressed in the labellum of a Drosophila mutant, pox-neuro70, in which taste neurons are eliminated. Tissue specificity of expression of these genes, along with their structural similarity, supports the possibility that the family encodes a large and divergent family of taste receptors. |
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