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The structure of human sweetness.

Zhang Juen1, Zhengyuan Lu2, Ruihuan Yu2

  • 1Zuckerman Mind Brain Behavior Institute and Department of Biochemistry and Molecular Biophysics, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA; Howard Hughes Medical Institute, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.

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Scientists mapped the human sweet receptor

Keywords:
GPCRcryo-EMhumansensory biologystructuresweet receptorsweetenerstaste

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Sensory Science

Background:

  • Sweet perception originates in the oral cavity via taste receptor cells (TRCs).
  • Human sweet TRCs possess a surface receptor crucial for sweet taste signaling.
  • This receptor mediates attraction to sweet stimuli like sugars and artificial sweeteners.

Purpose of the Study:

  • To elucidate the structural basis of sweet detection in humans.
  • To understand how a single receptor recognizes diverse sweet compounds.
  • To provide structural insights for designing novel taste modulators.

Main Methods:

  • Cryo-electron microscopy (cryo-EM) was employed.
  • The structure of the human sweet receptor was determined.
  • The receptor was analyzed in complex with sucralose and aspartame.

Main Results:

  • The cryo-EM structure of the human sweet receptor bound to sucralose and aspartame was revealed.
  • Structural details illuminate the mechanism of sweet detection.
  • Insights into the receptor's interaction with various sweet compounds were gained.

Conclusions:

  • The study provides the structural foundation for human sweet taste perception.
  • Understanding receptor-ligand interactions enables targeted design of taste-modulating agents.
  • This research opens avenues for developing new sweeteners and flavor modifiers.