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Structure and reaction mechanism of acetylcholine receptors. Hiroyuki SUGIYAMA 1 1Department of Cellular Physiology, National Institute for Physiological Sciences pp.584-590
Published Date 1986/8/10
DOI https://doi.org/10.11477/mf.1431905809
  • Abstract
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The structure and function of acetylcholine receptors, both nicotinic and muscarinic, were discussed. In the first part, nicotinic acetylcholine receptors were considered. The receptors from electric organs or skeletal muscles are one of the best characterized drug receptors. Recent know-ledge on this receptor was briefly summerized. In contrast to this receptor, nicotinic receptors of neuronal cells and brains are poorly understood. The reasons why neuronal nicotinic receptors are poorly understood were discussed. Several attempts to overcome the problems were reviewed.

In the second part, muscarinic acetylcholine receptors were considered. This type of receptor is much more complicated in the pattern and mechanism of responses it evokes than nicotinic acetylcholine receptor. Recent studies using differ-ent cells and tissue preparations, however, suggest that many of muscarinic responses may be me-diated by guanine nucleotide-binding regulatory protein (Ni or No). As an example, analyses of muscarinic response of Xenopus oocytes were discussed. It is proposed that the primary target of muscarinic acetylcholine receptor is Ni (or No) protein, which in turn triggers diverse effects and responses depending on cells and tissues.


Copyright © 1986, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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