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Published on: May 25, 2018
Acid-sensitive latent inhibitors for proteolytic enzymes: synthesis and characterization
1Department of Chemistry, Amherst College, Massachusetts 01002.
Journal of Medicinal Chemistry
|June 1, 1989
Summary
Peptide aldehyde derivatives, like BzPheal = Ala, show potential as prodrugs for enzyme inhibition. BzPheal = Ala releases a potent aldehyde inhibitor, demonstrating enhanced activity at lower pH levels.
Area of Science:
- Biochemistry
- Enzyme kinetics
- Medicinal chemistry
Background:
- Peptide aldehydes and acylhydrazones can form prodrugs.
- Lysosomal enzyme inhibition is a therapeutic target.
Purpose of the Study:
- To investigate the inhibitory properties of BzPheal = Ala.
- To understand the mechanism of inhibition by BzPheal = Ala.
Main Methods:
- Studied the reaction kinetics of BzPheal = Ala with proteases.
- Compared inhibition rates at different pH values (pH 5 and pH 7).
Main Results:
- BzPheal = Ala significantly reduced reaction rates catalyzed by alpha-chymotrypsin and papain.
- Inhibition was substantially greater at pH 5 compared to pH 7 (25-40 fold).
- Hydrolysis of BzPheal = Ala regenerated N-benzoyl-L-phenylalaninal, a more potent inhibitor.
Conclusions:
- BzPheal = Ala acts as a prodrug, releasing a potent aldehyde inhibitor.
- The enhanced inhibition at lower pH is due to accelerated hydrolysis and increased inhibitor potency.
- This highlights the potential of such derivatives for selective enzyme inhibition.
