Structure-activity relationships for macrocyclic peptidomimetic inhibitors of HIV-1 protease
摘要:
A rational approach to developing inhibitors of proteolytic enzymes is the systematic modification of their peptide substrates to proteolytically stable, low molecular weight, nonpeptidic inhibitors. Replacing the scissile amide bond with a noncleavable transition state isostere usually gives potent protease inhibitors, but the remaining hydrolysable amide bonds render the inhibitors unstable to peptidases generally. Attempts to replace them with retention of inhibitor potency has proved difficult(1,2) due to the unpredictable cooperative influences of such variations on the conformations of both neighbouring inhibitor groups and enzyme residues. We recently described a method(3) for regioselectively fixing the conformation of inhibitor components and now show effects on activity of varying both the 'free' and 'fixed' components.
Countering Cooperative Effects in Protease Inhibitors Using Constrained β-Strand-Mimicking Templates in Focused Combinatorial Libraries
作者:Robert C. Reid、Leonard K. Pattenden、Joel D. A. Tyndall、Jennifer L. Martin、Terry Walsh、David P. Fairlie
DOI:10.1021/jm030337m
日期:2004.3.1
unpredictably in response to subtle structural changes within a ligand. We have investigated the possibility of dampening the induced fit by using a constrained template as a replacement for adjoining segments of a ligand. The template preorganizes the ligand structure, thereby organizing the local enzyme environment. To test this approach, we used templates consisting of constrained cyclic tripeptides, formed