Hauptseite > Publikationsdatenbank > Coarse-Grained/Molecular Mechanics of the TAS2R38 Bitter Taste Receptor: Experimentally-Validated Detailed Structural Prediction of Agonist Binding > print

001     201309
005     20240625095114.0
024 7 _ |a 10.1371/journal.pone.0064675
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|a Marchiori, Alessandro
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245 _ _ |a Coarse-Grained/Molecular Mechanics of the TAS2R38 Bitter Taste Receptor: Experimentally-Validated Detailed Structural Prediction of Agonist Binding
260 _ _ |a Lawrence, Kan.
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336 7 _ |a Journal Article
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520 _ _ |a Bitter molecules in humans are detected by ~25 G protein-coupled receptors (GPCRs). The lack of atomic resolution structure for any of them is complicating an in depth understanding of the molecular mechanisms underlying bitter taste perception. Here, we investigate the molecular determinants of the interaction of the TAS2R38 bitter taste receptor with its agonists phenylthiocarbamide (PTC) and propylthiouracil (PROP). We use the recently developed hybrid Molecular Mechanics/Coarse Grained (MM/CG) method tailored specifically for GPCRs. The method, through an extensive exploration of the conformational space in the binding pocket, allows the identification of several residues important for agonist binding that would have been very difficult to capture from the standard bioinformatics/docking approach. Our calculations suggest that both agonists bind to Asn103, Phe197, Phe264 and Trp201, whilst they do not interact with the so-called extra cellular loop 2, involved in cis-retinal binding in the GPCR rhodopsin. These predictions are consistent with data sets based on more than 20 site-directed mutagenesis and functional calcium imaging experiments of TAS2R38. The method could be readily used for other GPCRs for which experimental information is currently lacking
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|a Capece, Luciana
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700 1 _ |0 P:(DE-HGF)0
|a Giorgetti, Alejandro
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700 1 _ |0 P:(DE-HGF)0
|a Gasparini, Paolo
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|a Behrens, Maik
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|a Carloni, Paolo
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700 1 _ |0 P:(DE-HGF)0
|a Meyerhof, Wolfgang
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