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Three sweet receptor genes are clustered in human Chromosome 1

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Abstract

A search of the human genome database led us to identify three human candidate taste receptors, hT1R1, hT1R2, and hT1R3, which contain seven transmembrane domains. All three genes map to a small region of Chromosome (Chr) 1. This region is syntenous to the distal end of Chr 4 in mouse, which contains the Sac (saccharin preference) locus that is involved in detecting sweet tastants. A genetic marker, DVL1, which is linked to the Sac locus, is within 1700 bp of human T1R3. Recently, the murine T1Rs and its human ortholog have been independently identified in combination as sweet and umami receptors near the Sac locus. All three hT1Rs genes are expressed selectively in human taste receptor cells in the fungiform papillae, consistent with their role in taste perception.

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Acknowledgements

We thank A. Patapoutian and M. Cooke for comments and helpful discussions. We also thank A. Moqrich and G. Story for help with the in situ hybridizations and the bioinformatics group at GNF for computational support. We are particularly indebted to J. Watson for preparing sections for us. We are particularly grateful to F. Lippincott and T.Wiltshire for their help with DNA sequencing. We also thank D. Ly for his help in obtaining human tongue for us. This work was supported in part by the Novartis Research Foundation. This is manuscript number 14362-CH of The Scripps Research Institute.

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  1. Department of Chemistry and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA

    Jiayu Liao & Peter G. Schultz

  2. The Genomic Institute of the Novartis Research Foundation, 3115 Merryfield Row, Suit 200, San Diego, California 92121, USA

    Peter G. Schultz

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  1. Jiayu Liao
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Correspondence to Jiayu Liao.

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Liao, J., Schultz, P.G. Three sweet receptor genes are clustered in human Chromosome 1 . Mamm Genome 14, 291–301 (2003). https://doi.org/10.1007/s00335-002-2233-0

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