OMIA:001617-9694 : Sweet taste, lack of in Panthera tigris
In other species: domestic cat , cheetah
Categories: Taste / olfaction phene
Possibly relevant human trait(s) and/or gene(s) (MIM number): 606226 (gene)
Links to MONDO diseases: No links.
Mendelian trait/disorder: yes
Considered a defect: yes
Key variant known: yes
Year key variant first reported: 2005
Cross-species summary: By sequencing very likely candidate genes (i.e. "genes involved in the initial transduction of sweet perception [which] might account for the indifference to sweet-tasting foods by cats"), Li et al. (2005) provided convincing evidence that one of the two genes required for the heteromer T1R2/T1R3 sweet-taste receptor, namely TAS1R2, is a non-functional pseudogene in all cats, tigers and cheetahs: in these species, the TAS1R2 gene has "a 247-base pair microdeletion in exon 3 and stop codons in exons 4 and 6" (Li et al., 2005). The authors argued that it seems likely that this same pseudogene may exist in all felidae.
|Symbol||Description||Species||Chr||Location||OMIA gene details page||Other Links|
|TAS1R2||Panthera tigris||-||no genomic information (-..-)||TAS1R2||Ensembl|
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WARNING! Inclusion of a variant in this table does not automatically mean that it should be used for DNA testing. Anyone contemplating the use of any of these variants for DNA testing should examine critically the relevant evidence (especially in breeds other than the breed in which the variant was first described). If it is decided to proceed, the location and orientation of the variant sequence should be checked very carefully.
Since October 2021, OMIA includes a semiautomated lift-over pipeline to facilitate updates of genomic positions to a recent reference genome position. These changes to genomic positions are not always reflected in the ‘acknowledgements’ or ‘verbal description’ fields in this table.
|OMIA Variant ID||Breed(s)||Variant Phenotype||Gene||Allele||Type of Variant||Source of Genetic Variant||Reference Sequence||Chr.||g. or m.||c. or n.||p.||Verbal Description||EVA ID||Inferred EVA rsID||Year Published||PubMed ID(s)||Acknowledgements|
|670||Sweet taste, lack||TAS1R2||deletion, gross (>20)||Naturally occurring variant||"a 247-base pair microdeletion in exon 3 and stop codons in exons 4 and 6"||2005||16103917|
Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.
|2006||Li, X., Li, W., Wang, H., Bayley, D.L., Cao, J., Reed, D.R., Bachmanov, A.A., Huang, L., Legrand-Defretin, V., Beauchamp, G.K., Brand, J.G. :|
|Cats lack a sweet taste receptor. J Nutr 136:1932S-1934S, 2006. Pubmed reference: 16772462 .|
|2005||Li, X., Li, W., Wang, H., Cao, J., Maehashi, K., Huang, L., Bachmanov, A.A., Reed, D.R., Legrand-Defretin, V., Beauchamp, G.K., Brand, J.G. :|
|Pseudogenization of a sweet-receptor gene accounts for cats' indifference toward sugar. PLoS Genet 1:27-35, 2005. Pubmed reference: 16103917 . DOI: 10.1371/journal.pgen.0010003.|
- Created by Frank Nicholas on 04 Oct 2011
- Changed by Frank Nicholas on 22 Mar 2012