Benzodioxocin-3-ones and N-acyl-3-amino-3-buten-2-ones: novel classes of cathepsin K cysteine protease inhibitors.
THE JOURNAL OF PEPTIDE RESEARCH : OFFICIAL JOURNAL OF THE AMERICAN PEPTIDE SOCIETY 2004;
63:265-9. [PMID:
15049838 DOI:
10.1111/j.1399-3011.2004.00138.x]
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Abstract
The design, synthesis, enzymologic, and protein mass spectrometric characterization of benzodioxocin-3-one and N-acyl-3-amino-3-buten-2-one inhibitors of the cysteine protease cathepsin K are described. The benzodioxocin-3-one ring system is chemically unstable giving rise to a mixture of N-acyl-3-amino-3-buten-2-one and hemiketals. This mixture of N-acyl-3-amino-3-buten-2-one and hemiketals potently inhibits recombinant, human cathepsin K (IC50 = 36 nM) by a time-independent, irreversible mechanism. Formation of a covalent adduct between cathepsin K and inhibitor has been confirmed by mass spectrometry.
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