Journal: Communications Chemistry
Article Title: Steviol rebaudiosides bind to four different sites of the human sweet taste receptor (T1R2/T1R3) complex explaining confusing experiments
doi: 10.1038/s42004-024-01324-x
Figure Lengend Snippet: The T1R2/T1R3 receptor features multiple binding sites for sweet ligands. Aspartame, neotame, Acesulfame K (Ace-K), Rebaudioside M (RebM), Rebaudioside D (RebD), Rebaudioside C (RebC), and Rebaudioside B (RebB) preferentially bind to the VFD2 domain. Sucrose and Rubusoside (Rubu) bind to both the VFD2 and VFD3 domains. The TMDs engage with various allosteric modulators and sweet compounds. Sweeteners like perillartine and RebB, along with the allosteric modulator S819 [1-((1H-pyrrol-2-yl)methyl)-3-(4-isopropoxyphenyl)thiourea] and amiloride, bind to TMD2. Additionally, RebB, RebC, Neohesperidin Dihydrochalcone (NHDC), cyclamate and lactisole bind to TMD3.
Article Snippet: T1R2 and T1R3 plasmids were transiently co-transfected into Expi293F cells (Gibco) using polyethylenimine (PolySciences) at 2.5 × 10 6 cells/mL in Expi293 expression medium (Gibco) with 10 mM sucrose.
Techniques: Binding Assay