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Botulinum neurotoxin (BoNT) is an extremely toxic protein to animals and humans. In its mode of action, one of its subunits mediates its translocation by integrating itself into the membrane bilayer. We have examined the membrane channel activity of type A BoNT (BoNT/A) and its heavy (H) chain in planar lipid membrane under various pH conditions to understand the possible role of the channel activity...
The mode of botulinum neurotoxin action involves binding of its heavy chain for internalization into the presynaptic end of a nerve cell through endocytosis. The low-pH conditions of endosomes trigger translocation of the light chain across the endosomal membrane to the cytosol, where the light chain cleaves specific target proteins involved in the docking and fusion of synaptic vesicles for acetylcholine...
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