Muscarinic acetylcholine receptors are stimulated by the neurotransmitter acetylcholine and
are involved in various functions across the human body. These receptors have surfaced for their
potential use as targets in treatment of Alzheimer’s disease. Muscarinic receptors have been reported to show binding
interaction with various mamba toxins, such as dendrotoxins and muscarinic toxins that act as antagonists of these
receptors. Therefore, in our study we have focused on the binding analysis of these mamba toxins with the M4 and M2
muscarinic acetylcholine autoreceptors for their potential use as targets in treating cognitive symptoms associated with
Alzheimer’s disease. A ligand dataset was developed that consisted of dendrotoxins and muscarinic toxins originating
from various mamba species. Receptor dataset consisted of M4 and M2 muscarinic acetylcholine autoreceptors. Docking
studies were performed using AutoDock 4.2 between these ligands with each receptor and further analysis was done using
various computational tools. Docking experiments were performed and analyzed to check the binding compatibilities
between mamba toxins and muscarinic acetylcholine autoreceptors. Detail analysis revealed that these ligands bind to
active site residues of both receptors. Therefore by these in silico results, we suggest that the mamba toxins can be
potential antagonists of the M4 and M2 muscarinic acetylcholine autoreceptors.
Keywords: Alzheimer’s, antagonists, autoreceptors, dendrotoxins, in silico, mamba toxins, muscarinic acetylcholine receptors,
muscarinic toxins, neurotransmitter.
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