Bitter taste receptors: Novel insights into the biochemistry and pharmacology

Bitter taste receptors (T2Rs) belong to the super family of G protein-coupled receptors (GPCRs). There are 25 T2Rs expressed in humans, and these interact with a large and diverse group of bitter ligands. T2Rs are expressed in many extra-oral tissues and can perform diverse physiological roles. Stru...

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Veröffentlicht in:The international journal of biochemistry & cell biology 2016-08, Vol.77 (Pt B), p.184-196
Hauptverfasser: Jaggupilli, Appalaraju, Howard, Ryan, Upadhyaya, Jasbir D., Bhullar, Rajinder P., Chelikani, Prashen
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container_end_page 196
container_issue Pt B
container_start_page 184
container_title The international journal of biochemistry & cell biology
container_volume 77
creator Jaggupilli, Appalaraju
Howard, Ryan
Upadhyaya, Jasbir D.
Bhullar, Rajinder P.
Chelikani, Prashen
description Bitter taste receptors (T2Rs) belong to the super family of G protein-coupled receptors (GPCRs). There are 25 T2Rs expressed in humans, and these interact with a large and diverse group of bitter ligands. T2Rs are expressed in many extra-oral tissues and can perform diverse physiological roles. Structure-function studies led to the identification of similarities and dissimilarities between T2Rs and Class A GPCRs including amino acid conservation and novel motifs. However, the efficacy of most of the T2R ligands is not yet elucidated and the biochemical pharmacology of T2Rs is poorly understood. Recent studies on T2Rs characterized novel ligands including blockers for these receptors that include inverse agonist and antagonists. In this review we discuss the techniques used for elucidating bitter blockers, concept of ligand bias, generic amino acid numbering, the role of cholesterol, and conserved water molecules in the biochemistry and pharmacology of T2Rs.
doi_str_mv 10.1016/j.biocel.2016.03.005
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subjects Amino Acid Sequence
Animals
Bitter blockers
Bitter taste receptors (T2Rs)
Cholesterol
Constitutive active mutants
G protein-coupled receptor (GPCR)
Humans
Ligand bias
Ligands
Receptors, G-Protein-Coupled - chemistry
Receptors, G-Protein-Coupled - genetics
Receptors, G-Protein-Coupled - metabolism
Structural water molecules
Taste Perception - drug effects
title Bitter taste receptors: Novel insights into the biochemistry and pharmacology
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