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• W2166502014 abstract "A mathematical model for the binding and function of metabotropic glutamate receptors was developed, with the aim to gain new insights into the functioning of these complex receptors. These receptors are homodimers, and each subunit is composed of a ligand binding [Venus flytrap (VFT)] domain and a heptahelical domain (HD) responsible for G-protein activation. Our mechanistic model integrates all structural information available so far: the various states of the VFT dimer (open-open, closed-open, and closed-closed), as well as the fact that a single HD is active at a time. To provide the model with parameters with biological meaning, two published experimental studies were reanalyzed. The first one reports a negative cooperativity in agonist binding (<i>J Biol Chem</i> 279:35526–35534, 2004), whereas the other indicates a positive cooperativity in agonist-mediated response (<i>Nat Struct Mol Biol</i> 11:706–713, 2004). The former study allowed us to explain the mechanistic features associated with VFT recognition by agonists and antagonists integrating a negative allosteric interaction for agonist binding. The second study helped us to quantitatively describe the functional dynamics of transduction of the VFT occupation into functional response, confirming a putative positive cooperativity at the level of receptor coupling efficacy. This model will help both to better understand the functioning of these receptors and to characterize the mechanism of action of various types of allosteric modulators. Moreover, this model may be of general utility for oligomeric systems in which the ligand binding and effector domains correspond to distinct structural domains." @default.
• W2166502014 created "2016-06-24" @default.
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• W2166502014 date "2008-02-20" @default.
• W2166502014 modified "2023-10-15" @default.
• W2166502014 title "Modeling the Binding and Function of Metabotropic Glutamate Receptors" @default.
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• W2166502014 doi "https://doi.org/10.1124/jpet.107.133967" @default.
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