Quaternary structure of the acetylcholine receptor.
The five membrane-spanning subunits of the acetylcholine receptor have been resolved in electron microscope images and are shown to lie at pentagonally symmetrical positions around the channel over a large fraction of their length. The channel consists of a wide synaptic portion and a narrow portion extending through the membrane into the interior of the cell.
D000818:Animals; D003461:Crystallography; D046911:Macromolecular Substances; D008565:Membrane Proteins; D008854:Microscopy, Electron; D011487:Protein Conformation; D011950:Receptors, Cholinergic; D014101:Torpedo
D046911:Macromolecular Substances; D008565:Membrane Proteins; D011950:Receptors, Cholinergic