On homology modeling of the M2 muscarinic acetylcholine receptor subtype

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On homology modeling of the M2 muscarinic acetylcholine receptor subtype

Twelve homology models of the human M2 muscarinic receptor using different sets of templates have been designed using the Prime program or the modeller program and compared to crystallographic structure (PDB:3UON). The best models were obtained using single template of the closest published structure, the M3 muscarinic receptor (PDB:4DAJ). Adding more (structurally distant) templates led to wor...

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Receptor subtype-specific regulation of muscarinic acetylcholine receptor sequestration by dynamin. Distinct sequestration of m2 receptors.

Sustained stimulation of muscarinic acetylcholine receptors (mAChRs) and other G protein-coupled receptors usually leads to a loss of receptor binding sites from the plasma membrane, referred to as receptor sequestration. Receptor sequestration can occur via endocytosis of clathrin-coated vesicles that bud from the plasma membrane into the cell but may also be accomplished by other, as yet ill-...

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Multiple topological domains mediate subtype-specific internalization of the M2 muscarinic acetylcholine receptor.

Endocytosis of agonist-activated G protein-coupled receptors (GPCRs) is required for both resensitization and recycling to the cell surface as well as lysosomal degradation. Thus, this process is crucial for regulation of receptor signaling and cellular responsiveness. Although many GPCRs internalize into clathrin-coated vesicles in a dynamin-dependent manner, some receptors, including the M(2)...

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Revisiting the Endocytosis of the M2 Muscarinic Acetylcholine Receptor

The agonist-induced endocytosis of the muscarinic acetylcholine receptor M2 is different from that of the other members of the muscarinic receptor family. The uptake of the M2 receptor involves the adapter proteins of the β-arrestin family and the small GTPase ADP-ribosylation factor 6. However, it has remained inconclusive if M2 endocytosis is dependent on clathrin or the large GTPase dynamin....

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Non-Neuronal Functions of the M2 Muscarinic Acetylcholine Receptor

Acetylcholine is an important neurotransmitter whose effects are mediated by two classes of receptors. The nicotinic acetylcholine receptors are ion channels, whereas the muscarinic receptors belong to the large family of G protein coupled seven transmembrane helix receptors. Beyond its function in neuronal systems, it has become evident that acetylcholine also plays an important role in non-ne...

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ژورنال

عنوان ژورنال: Journal of Computer-Aided Molecular Design

سال: 2013

ISSN: 0920-654X,1573-4951

DOI: 10.1007/s10822-013-9660-8