Sinha B, Cao Z, Murray TF, Aldrich JV. Discovery of dermorphin-based affinity labels with subnanomolar affinity for mu opioid receptors.
J Med Chem 2009;
52:7372-5. [PMID:
19621878 DOI:
10.1021/jm9007592]
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Abstract
A series of potent electrophilic affinity labels (IC(50) = 0.1-5 nM) containing either a bromoacetamide or isothiocyanate based on the mu opioid receptor (MOR) selective peptide dermorphin were prepared. All four analogues exhibited wash resistant inhibition of [(3)H]DAMGO binding at subnanomolar to nanomolar concentrations, suggesting that these analogues bind covalently to MOR. To our knowledge, these peptides are the highest affinity peptide-based affinity labels for MOR reported to date.
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