T1R HETERO-OLIGOMERIC TASTE RECEPTORS AND CELL LINES THAT EXPRESS SAID RECEPTORS AND USE THEREOF FOR IDENTIFICATION OF TASTE COMPOUNDS
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United States of America Patent
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app pub date -
Oct 31, 2007
filing date -
Mar 7, 2001
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Abandoned
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Abstract
The present invention relates to the discovery that the T1R receptors assemble to form functional taste receptors. Particularly, it has been discovered that co-expression of T1R1 and T1R3 results in a taste receptor that responds to umami taste stimuli, including monosodium glutamate. Also, it has been discovered that co-expression of the T1R2 and T1R3 receptors results in a taste receptor that responds to sweet taste stimuli including naturally occurring and artificial sweeteners. Also the present invention relates to the use of hetero-oligomeric taste receptors comprising T1R1/T1R3 and T1R2/T1R3 in assays to identify compounds that respectively respond to umami taste stimuli and sweet taste stimuli. Further, the invention relates to the constitutive of cell lines that stably or transiently co-express a combination of T1R1 and T1R3; or T1R2 and T1R3; under constitutive or inducible conditions. The use of these cells lines in cell-based assays to identify umami and sweet taste modulatory compounds is also provided, particularly high throughput screening assays that detect receptor activity by use of fluorometric imaging. Finally, the invention relates to the discovery that some compounds, e.g., lactisole, inhibit both the activities of human T1R2/T1R3 and T1R1/T1R3 receptors, and accordingly the sweet and umami taste, suggesting that these receptors may be the only sweet and umami receptors.
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International Classification(s)
- A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
- C12Q:MEASURING OR TESTING PROCESSES INVOLVING ENZYMES O....
- C12N:MICRO-ORGANISMS OR ENZYMES; COMPOSITIONS THEREOF
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- A61P:THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDI....
- C40B:COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL ....
- C07K:PEPTIDES
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