|
|
Characterization of ligand binding to M1 muscarinic acetylcholine receptor using fluorescence anisotropy method
Danková, Hana ; Vokřál, Ivan (advisor) ; Červený, Lukáš (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Student: Hana Danková Supervisors: Prof. Ago Rinken, PhD. MSc. Tõnis Laasfeld PharmDr. Ivan Vokřál, PhD. Title of diploma thesis: Characetrization of ligand binding to M1 muscarinic receptor using fluorescence anisotropy method Muscarinic acetylcholine receptors (mAChRs), members of the superfamily of G-protein coupled receptors (GPCRs), regulate vital physiological processes and are important targets in drug research. Five different subtypes (M1 - M5) have been identified. M1 mAChR is mainly distributed in the central nervous system and is linked to pathophysiology of neurodegenerative diseases. In recent years, fluorescent methods have been frequently used in studies of ligand binding to receptors. The fluorescence anisotropy (FA) is a homogenous assay to characterize ligand binding to receptors. In this work, we have evaluated the FA method with fluorescent ligand MK342 binding to M1 mAChRs expressed on budded baculovirus (BBV) particles. The fluorescence ligand was binding with the high affinity (4,4 nM) to M1 receptor in constructed BBV preparation. The apparent binding affinities (pKi) of eleven classical and three bitopic muscarinic ligands were screened and compared to previously published...
|
|
|
Characterization of ligand binding to M1 muscarinic acetylcholine receptor using fluorescence anisotropy method
Danková, Hana ; Vokřál, Ivan (advisor) ; Červený, Lukáš (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Student: Hana Danková Supervisors: Prof. Ago Rinken, PhD. MSc. Tõnis Laasfeld PharmDr. Ivan Vokřál, PhD. Title of diploma thesis: Characetrization of ligand binding to M1 muscarinic receptor using fluorescence anisotropy method Muscarinic acetylcholine receptors (mAChRs), members of the superfamily of G-protein coupled receptors (GPCRs), regulate vital physiological processes and are important targets in drug research. Five different subtypes (M1 - M5) have been identified. M1 mAChR is mainly distributed in the central nervous system and is linked to pathophysiology of neurodegenerative diseases. In recent years, fluorescent methods have been frequently used in studies of ligand binding to receptors. The fluorescence anisotropy (FA) is a homogenous assay to characterize ligand binding to receptors. In this work, we have evaluated the FA method with fluorescent ligand MK342 binding to M1 mAChRs expressed on budded baculovirus (BBV) particles. The fluorescence ligand was binding with the high affinity (4,4 nM) to M1 receptor in constructed BBV preparation. The apparent binding affinities (pKi) of eleven classical and three bitopic muscarinic ligands were screened and compared to previously published...
|
|
|
Molecular dynamics simulations of the muscarinic receptor
Cajzl, Radim ; Barvík, Ivan (advisor) ; Pospíšil, Miroslav (referee)
Title: Molecular dynamics simulations of the muscarinic receptor Author: Radim Cajzl Department: Institute of Physics of Charles University Supervisor: RNDr. Ivan Barvík, Ph.D., Division of Biomolecular Physics Abstract: This thesis is devoted to molecular dynamics simulations of the mus- carinic M2 receptor placed in a phospholipidic membrane. Basic algorithms of molecular dynamics are described and applied on a simple model of rare gases. Relations for calculation of binding free energies are derived. Several tricks for sa- ving up computational time are presented. Next part contains a brief description of proteins and cellular membranes, structure and biological relevance of musca- rinic receptors and known crystal structures of the muscarinic M2 receptor. The chapter with results contains detailed description of calculations of bin- ding free energy differences for several ligands bound to the muscarinic M2 recep- tor. Obtained values match the experimental ones. Dynamics of the muscarinic M2 receptor was also studied yielding a direction for future studies of the acti- vation mechanism. Short discussion on application of obtained results in rational drug design can be found in the Conclusion chapter. Keywords: molecular dynamics, membrane proteins, free energy perturbation, muscarinic receptor,...
|
guest ::
