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  • Title: Immuno-photoaffinity labeling of the D2-dopamine receptor.
    Author: Kanety H, Fuchs S.
    Journal: Biochem Biophys Res Commun; 1988 Sep 15; 155(2):930-6. PubMed ID: 2458727.
    Abstract:
    Azido-haloperidol was synthesized and applied as a photoaffinity ligand for the D2-dopamine receptor. In bovine striatal membranes, azido-haloperidol bound reversibly to the receptor (KD = 15 nM), and when exposed to light, it bound to the receptor irreversibly. This irreversible inactivation was prevented by the dopaminergic agonist N-propylnorapomorphine or the dopaminergic antagonists haloperidol and (+)-butaclamol. The photoaffinity labeled D2-receptor was probed with anti-haloperidol antibodies following gel electrophoresis and transfer to nitrocellulose. A major polypeptide of 94 kDa reacted with the anti-haloperidol antibodies. This polypeptide band was not observed when the photoaffinity labeling was performed in the presence of (+)-butaclamol or spiperone.
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