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Updated: Jul 13, 2026

Live-cell Measurement of Odorant Receptor Activation Using a Real-time cAMP Assay
Published on: October 2, 2017
Differences in (-)citronellal binding to various odorant receptors.
Anna Stary1, Chonticha Suwattanasophon, Peter Wolschann
1Institute for Theoretical Chemistry, University of Vienna, Waehringer Strasse 17, A-1090 Vienna, Austria. a9827228@unet.univie.ac.at
Olfactory receptors (ORs) recognize distinct molecular features, or "odotypes," in odorants. Receptor structure dictates binding affinity, influencing how different ORs perceive the same molecule.
Area of Science:
- * Neuroscience and Olfaction Research
- * Molecular Biology and Receptor-Ligand Interactions
Background:
- * The sense of smell relies on olfactory receptors (ORs) detecting diverse odor molecules.
- * Understanding how ORs recognize specific molecular features (
Purpose of the Study:
- * To investigate the hypothesis that olfactory receptors (ORs) recognize distinct molecular features, termed "odotypes."
- * To analyze receptor-ligand interactions for human and mouse ORs with (-)citronellal.
Main Methods:
- * Studied receptor-ligand interactions of four olfactory receptors (two human, two mouse) using (-)citronellal as the odor ligand.
- * Compared binding pocket structures and EC(50) values for receptors with varying sequence identities.
Main Results:
- * Structurally similar receptors (OLFR43, OR1A1, OR1A2) exhibited identical binding pockets and comparable EC(50) values for (-)citronellal.
- * ORs with lower sequence identity demonstrated different binding mechanisms for (-)citronellal, resulting in varied EC(50) values.
Conclusions:
- * Olfactory receptor structure significantly influences the recognition of molecular features (
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