Journal of Protein Chemistry

, Volume 7, Issue 2, pp 141–150 | Cite as

Photoaffinity labeling of functional states of the nicotinic acetylcholine receptor

  • W. Oberthür
  • F. Hucho


The nicotinic acetycholine receptor was subjected to photoaffinity labeling in different conformational and functional states. The photolabel used was the ion-channel blocker [3H]-TPMP+. A procedure is described for isolating labeled δ-polypeptide chains from the receptor complex by preparative SDS-polyacrylamide gel electrophoresis. The photolabel was localized in the primary structure of the δ-chain. The site of labeling was found to be identical when photoaffinity labeling was performed in the resting, desensitized, or antagonist state, respectively.

Key words

nicotinic acetylcholine receptor photoaffinity labeling ion channel conformational states functional domains 


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Copyright information

© Plenum Publishing Corporation 1988

Authors and Affiliations

  • W. Oberthür
    • 1
  • F. Hucho
    • 1
  1. 1.Institut für BiochemieFreie Universität BerlinBerlin 33West Germany

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