Abstract:
:[3H]Morphine, PL-017[prolyl-3,4-3H,D-prolyl,3,4-3H] ([3H]PL-017) and enkephalin-(2-D-penicillamine,5-D-penicillamine)[tyrosyl-2,6-3H] ([3H]DPDPE) were directly cross-linked to mouse brain opiate receptors by an ultraviolet (254 nm) irradiation procedure. [3H]Morphine preferentially and specifically labeled a 58 kDa protein. The labeling of this protein was suppressed by the addition of excess naloxone. Dithiothreitol reduced the irreversible binding of [3H]morphine and [3H]PL-017 to the receptor protein. In the acid hydrolysate of [3H]DPDPE-labeled opiate receptors, dityrosine, was detected. These results suggest that the [3H]tyrosine residue of [3H]DPDPE covalently bound the tyrosine residue of delta-opioid receptors. The direct UV-photoaffinity labeling method using commercially available radioactive opiates described here should be a useful tool for characterization and purification of the opiate receptors.
journal_name
Biochem Pharmacoljournal_title
Biochemical pharmacologyauthors
Nagamatsu K,Tagawa Y,Uchida S,Hasegawa Adoi
10.1016/0006-2952(93)90458-9subject
Has Abstractpub_date
1993-10-05 00:00:00pages
1119-23issue
7eissn
0006-2952issn
1873-2968pii
0006-2952(93)90458-9journal_volume
46pub_type
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