Evidence map›Paper›PMID 33709046›Full record

ArticleCurrent opinion in physiology2021

Sour taste: receptors, cells and circuits.

Emily R Liman, Sue C Kinnamon

Abstract read
In one paragraph

Article in Current opinion in physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

29 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Taste dysfunction in Long COVID.bioRxiv : the preprint server for biology · 2025
    Article
  5. Chemosensory tobacco product toxicology part 2: toxicological testing, assays, and state of the science.Toxicological sciences : an official journal of the Society of Toxicology · 2025
    Review
  6. Article
  7. Article
  8. A deadly taste: linking bitter taste receptors and apoptosis.Apoptosis : an international journal on programmed cell death · 2025
    Review
  9. Fat taste responsiveness, but not dietary fat intake, is affected inbioRxiv : the preprint server for biology · 2025
    Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Contribution of TRPC3-mediated CaPflugers Archiv : European journal of physiology · 2023
    Article
  17. Article
  18. Review
  19. The basics of base sensing.Nature metabolism · 2023
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Emily R LimanDepartment of Biological Sciences, Section of Neurobiology, University of Southern California, 3641 Watt Way, Los Angeles, CA 90089, USA.
Sue C KinnamonDepartment of Otolaryngology and Rocky Mountain Taste and Smell Center, University of Colorado Anschutz Medical Campus, 12700 E 19(th) Avenue, Aurora, CO 80045, USA.

Funding

Role of the proton channel OTOP1 in taste transductionR01DC013741 · NIDCD · UNIVERSITY OF SOUTHERN CALIFORNIA · PI Sue C. Kinnamon, EMILY R. LIMAN · 2014 to 2026
$5.7M
Purinergic signaling in taste budsR01DC012555 · NIDCD · UNIVERSITY OF COLORADO DENVER · PI KINNAMON, SUE C. · 2012 to 2021
$3.9M
Illuminating the structure and function of Type I taste cellsR01DC017679 · NIDCD · UNIVERSITY OF COLORADO DENVER · PI KINNAMON, SUE C. · 2019 to 2023
$2.5M
Cellular Physiology of Otopetrin Proton ChannelsR01GM131234 · NIGMS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI LIMAN, EMILY R. · 2019 to 2022
$1.4M
NIDCD NIH HHS R01 DC012555NIDCD NIH HHS R01 DC013741NIDCD NIH HHS R01 DC017679NIGMS NIH HHS R01 GM131234
6 · The paper itself

Abstract

Sour taste, which is evoked by low pH, is one of the original four fundamental taste qualities, recognized as a distinct taste sensation for centuries, and universally aversive across diverse species. It is generally assumed to have evolved for detection of acids in unripe fruit and spoiled food. But despite decades of study, only recently have the receptor, the neurotransmitter, and the circuits for sour taste been identified. In this review, we describe studies leading up to the identification of the sour receptor as OTOP1, an ion channel that is selectively permeable to protons. We also describe advances in our understanding of how information is transmitted from the taste receptor cells to gustatory neurons, leading to behavioral aversion to acids.

Indexed as

geniculateOTOP1OtopetrinPKD2L1sensory codingserotoninsourtastetrigeminal

Identifiers

PMID33709046
PMCPMC7943026

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.