Influence of the gamma subunit and expression system on acetylcholine receptor gating.


Journal Article

We have developed a partial kinetic theory for the gating of murine nicotinic acetylcholine receptors (AChRs) expressed in Xenopus oocytes and have used this theory to characterize the role of the gamma subunit in single-channel behavior. Permeation and gating were found to be largely unaffected in AChRs produced in oocytes when the gamma subunit transcript was omitted from microinjections of AChR subunit RNAs. In contrast, marked changes in gating kinetics resulted when even very conservative single amino acid substitutions were introduced into the gamma subunit, indicating that the gamma subunit can have a large effect on AChR gating. We also found that channel openings were much prolonged when murine AChRs were expressed in BC3H-1 cells.

Full Text

Cited Authors

  • Lo, DC; Pinkham, JL; Stevens, CF

Published Date

  • December 1990

Published In

Volume / Issue

  • 5 / 6

Start / End Page

  • 857 - 866

PubMed ID

  • 1702647

Pubmed Central ID

  • 1702647

Electronic International Standard Serial Number (EISSN)

  • 1097-4199

International Standard Serial Number (ISSN)

  • 0896-6273

Digital Object Identifier (DOI)

  • 10.1016/0896-6273(90)90345-g


  • eng