The Molecular Receptive Ranges of Human TAS2R Bitter Taste Receptors
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ID: 298107
2009
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Abstract
Humans perceive thousands of compounds as bitter. In sharp contrast, only ∼25 taste 2 receptors (TAS2R) bitter taste receptors have been identified, raising the question as to how the vast array of bitter compounds can be detected by such a limited number of sensors. To address this issue, we have challenged 25 human taste 2 receptors (hTAS2Rs) with 104 natural or synthetic bitter chemicals in a heterologous expression system. Thirteen cognate bitter compounds for 5 orphan receptors and 64 new compounds for previously identified receptors were discovered. Whereas some receptors recognized only few agonists, others displayed moderate or extreme tuning broadness. Thus, 3 hTAS2Rs together were able to detect ∼50% of the substances used. Conversely, though 63 bitter substances activated only 1–3 receptors, 19 compounds stimulated up to 15 hTAS2Rs. Our data suggest that the detection of the numerous bitter chemicals is related to the molecular receptive ranges of hTAS2Rs.
| Reference Key |
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| Authors | Wolfgang Meyerhof, Claudia Batram, Christina Kühn, Anne Brockhoff, Elke Chudoba, Bernd Bufe, Giovanni Appendino, Maik Behrens |
| Journal | chemical senses |
| Year | 2009 |
| DOI |
10.1093/chemse/bjp092
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| URL | |
| Keywords | Keywords not found |
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