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FLASH GENE
Symbol TAS1R3 contributors: mct/npt - updated : 25-04-2017
HGNC name taste receptor, type 1, member 3
HGNC id 15661
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • seven trasmembrane segments (7TM)
  • a N terminal extracellular binding domain
  • conjugated GlycoP
    mono polymer homomer , heteromer , dimer
    HOMOLOGY
    interspecies homolog to rattus Tas1r3 (74.3pc)
    homolog to murine Tas1r3 (73.6pc)
    intraspecies paralog to TAS1R2
    paralog to TAS1R1
    Homologene
    FAMILY
  • G-protein coupled receptor 3 family
  • taste receptor family
  • sweet receptor subfamily
  • CATEGORY receptor membrane G
    SUBCELLULAR LOCALIZATION     plasma membrane
    basic FUNCTION
  • being essential for the recognition and response to the disaccharide trehalose
  • having a role in glucose-mediated incretin release and may serve as the previously unknown gut lumen glucose sensor
  • required for the enhanced expression of SLC5A1 shown by enterocytes in response to luminal sugars or sweeteners
  • with TAS1R2, in addition to their role in taste perception, may also have a role in intrahepatic cholangiocytes (Toyono 2007)
  • with TAS1R1, believed to function in combination as a heteromeric glutamate taste receptor in humans (Chen 2009)
  • with TAS1R1, likely contributes to human umami taste perception (Chen 2009)
  • TAS1R2/TAS1R3 are involved in glucose-dependent secretion of satiation peptides
  • with TAS1R2, mediating sweet taste perception (Fushan 2009)
  • TAS1R1/TAS1R3 are a direct sensor of the fed state and amino acid availability
  • TAS1R1 receptor subunit acts as an umami taste receptor in combination with its partner, TAS1R3
  • effects of artificial sweeteners on adipose tissue biology may be largely independent of the classical sweet taste receptors, TAS1R2 and TAS1R3
  • functions as a cell-surface glucose-sensing receptor in pancreatic beta-cells
  • TAS1R2 and TAS1R3 are likely to have a novel membrane trafficking system
  • TAS1R2/TAS1R3 are expressed in taste bud cells in the oral cavity and involved in membrane glucose sensing in endocrine cells regulating glucose homeostasis
  • TAS1R3 receptor protein plays an important role in control of glucose homeostasis not only by regulating sugar intake but also via its extraoral function, probably in the pancreas and brain
  • TAS1R3 and its associated heterotrimeric GNAT3 are involved
  • in sweet and umami sensing in taste cells
    CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling signal transduction , sensory transduction/taste
    sweet receptor
    a component
  • forming homodimers or heterodimers with TAS1R1 and TAS1R2
  • heterodimerization of TAS1R2 and TAS1R3 is required for the perception of sweet substances
  • INTERACTION
    DNA
    RNA
    small molecule
    protein
  • L-amino acids "sweet" ligands
  • MYOD1 and MYOG might likely control skeletal muscle metabolism and homeostasis through the regulation of TAS1R3 promoter activity
  • cell & other
  • lactisole (sodium salt of 2-(4-methoxyphenoxy)-propionic acid)
  • REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Susceptibility
    Variant & Polymorphism other TAS1R1-TAS1R3 receptor variants found in human fungiform papillae might contribute to inter-individual differences of sensitivity to L-glutamate (Raliou 2009)
    Candidate gene
    Marker
  • TAS1R3 and UCN2 in peripheral blood cells may be considered potential biomarkers of consumption of sugary and fatty food, respectively
  • Therapy target
    ANIMAL & CELL MODELS
  • T1r3 knockout mice have increased rate of autophagy in the heart, skeletal muscle and liver
  • fasted Tas1r3 (-/-) mice have increased autophagy in the heart, skeletal muscle and liver