Nicotinic Acetylcholine Receptor

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When in the presence of [[acetylcholine]], the receptor undergoes a conformational change opening up the channel to an influx of sodium (Na) within the cell. When this happens the cell undergoes a depolarization event that triggers an action potential to propagate along the rest of the cell stimulating, for example, a muscle response.
When in the presence of [[acetylcholine]], the receptor undergoes a conformational change opening up the channel to an influx of sodium (Na) within the cell. When this happens the cell undergoes a depolarization event that triggers an action potential to propagate along the rest of the cell stimulating, for example, a muscle response.
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The opening of these channels only lasts for a millisecond due to [[cholinesterase]] being present and breaking down [[acetylcholine]] attached to the receptor causing the receptor to close again. Introduction of [[cholinesterase inhibitors]] can cause a depolarization block. It works by creating a prolonged refractory period in the depolarization event promoted by the opening of the receptor channel.
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The opening of these channels only lasts for a millisecond due to [[cholinesterase]] being present and breaking down [[acetylcholine]] attached to the receptor causing the receptor to close again. Introduction of [[Acetylcholinesterase inhibitors]] can cause a depolarization block. It works by creating a prolonged refractory period in the depolarization event promoted by the opening of the receptor channel.
=== Locations ===
=== Locations ===
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*[[Transmembrane (cell surface) receptors]]
*[[Transmembrane (cell surface) receptors]]
*[[Ionotropic receptors]]
*[[Ionotropic receptors]]
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</StructureSection>
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== 3D Structures of nicotinic acetylcholine receptor ==
== 3D Structures of nicotinic acetylcholine receptor ==
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Updated on {{REVISIONDAY2}}-{{MONTHNAME|{{REVISIONMONTH}}}}-{{REVISIONYEAR}}
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[[Acetyl choline receptor 3D structures]]
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</StructureSection>
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[[4d01]] – hAChR α-9 subunit extracellular domain – human<br />
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[[4uxu]] – hAChR α-9 subunit extracellular domain + methyllycaconitine<br />
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[[4uy2]] – hAChR α-9 subunit extracellular domain + α-bungarotoxin<br />
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[[6hy7]] – hAChR alpha-9 subunit extracellular domain + α-conotoxin<br />
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[[5hbt]] – hAChR α-1 subunit extracellular domain + α-bungarotoxin + antibody<br />
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[[2qc1]] – AChR α subunit extracellular domain + α-bungarotoxin - mouse<br />
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[[3mra]] – TcAChR α subunit M3 transmembrane segment – ''Torpedo californica'' - NMR<br />
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[[2k58]] – AChR β-2 subunit M1 transmembrane segment - NMR<br />
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[[2k59]] – AChR β-2 subunit M2 transmembrane segment - NMR<br />
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[[1oed]] – TmAChR pore – ''Torpedo marmorata'' – electron images<br />
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[[2bg9]], [[4aq5]], [[4aq9]], [[4bog]], [[4boi]], [[4bon]], [[4boo]], [[4bor]], [[4bot]] – TmAChR – Cryo-EM<br />
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== References ==
== References ==

Current revision

Nicotinic Acetylcholine Receptor, PDB code 2bg9

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References

1. Cholinesterase Inhibitors: Including Insecticides and Chemical Warfare Nerve Agents, Agency for Toxiz Substances and Disease Regulation accessed 5/2/14

2. Pierre-Jean Corringer and Jean-Pierre Changeux (2008) Nicotinic acetylcholine receptors. Scholarpedia, 3(1):3468.

3. Adcock C, Smith GR, Sansom MS. The nicotinic acetylcholine receptor: from molecular model to single-channel conductance. Eur Biophys J. 2000;29:29–37.

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Michal Harel, Joel L. Sussman, Alexander Berchansky, Alex Pennington

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