The function of TAS1R3 (taste 1 receptor member 3, Ensembl gene identifier ENSG00000169962) is as follows. Putative taste receptor. TAS1R1/TAS1R3 responds to the umami taste stimulus (the taste of monosodium glutamate). TAS1R2/TAS1R3 recognizes diverse natural and synthetic sweeteners. TAS1R3 is essential for the recognition and response to the disaccharide trehalose (By similarity). Sequence differences within and between species can significantly influence the selectivity and specificity of taste responses. {ECO:0000250, ECO:0000269|PubMed:11917125, ECO:0000269|PubMed:12892531}.