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Author Spotlight: Sieving Fruit Pulp to Detect Immature Tephritid Fruit Flies in the Field

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Bitter Fruit: Inverse Associations Between PTC and Antidesma bunius Perception.

Stephen P Wooding¹

¹University of California, CA, USA.

Chemical Senses

|July 9, 2018

Summary

This summary is machine-generated.

The TAS2R38 gene influences bitter taste perception. New research suggests the "non-taster" allele, previously thought inactive, may actually enable the perception of other bitter compounds, like those in certain fruits.

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Area of Science:

Genetics
Human Sensory Perception
Molecular Biology

Background:

Bitter taste perception is genetically determined, primarily by the TAS2R38 gene.
The dominant "taster" allele confers sensitivity to phenylthiocarbamide (PTC), while the recessive "non-taster" allele results in insensitivity.
The functional role of the "non-taster" allele beyond PTC perception remains largely unexplored.

Purpose of the Study:

To investigate whether the recessive "non-taster" TAS2R38 allele has a functional role in bitter taste perception.
To explore the potential for the "non-taster" allele to mediate sensitivity to bitter compounds other than PTC.

Main Methods:

Genetic association studies correlating TAS2R38 genotypes with bitter taste sensitivity.
Sensory evaluation of bitter compounds, including PTC and compounds found in the tropical berry Antidesma bunius.

Main Results:

Observed an inverse association between TAS2R38 genotype and bitter sensitivity to Antidesma bunius compared to PTC.
Individuals with the "non-taster" allele exhibited sensitivity to bitter compounds in Antidesma bunius.

Conclusions:

The "non-taster" allele of the TAS2R38 gene is not functionless but actively mediates bitter taste perception.
This allele enables the perception of specific bitter compounds, such as those present in Antidesma bunius, demonstrating a broader role in chemosensation.