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• W2015697812 abstract "Thirty-six new amino acid and peptidyl diphenyl phosphonate esters were synthesized and evaluated to identify potent and selective inhibitors for four trypsin-like proteases: lymphocyte granzymes A and K, human mast cell tryptase, and pancreatic trypsin. Among five Cbz derivatives of Lys and Arg homologues, Z-(4-AmPhe)P(OPh)2 is the most potent inhibitor for granzyme A, and Z-LysP(OPh)2 is the best inhibitor for granzyme K, mast tryptase, and trypsin. The amidino P1 residue d,l-(4-AmPhGly)P(OPh)2 was utilized in a series of compounds with several different N-protecting groups and systematic substitutions at P2 in Cbz-AA derivatives and at P3 in Cbz-AA-Ala derivatives. Generally, these phosphonates inhibit granzyme A and trypsin more potently than granzyme K and tryptase. The P2 Thr and Ala dipeptide phosphonates, Cbz-AA-(4-AmPhGly)P(OPh)2, are the most potent inhibitors for granzyme A, and Cbz-Thr-(4-AmPhGly)P(OPh)2 (kobs/[I] = 2220 M-1 s-1) was quite specific with much lower inhibition rates for granzyme K and trypsin (kobs/[I] = 3 and 97 M-1 s-1, respectively) and no inhibition with tryptase. The most effective inhibitor of granzyme A was Ph-SO2-Gly-Pro-(4-AmPhGly)P(OPh)2 with a second-order rate constant of 3650 M-1 s-1. The most potent inhibitor for granzyme K was 3,3-diphenylpropanoyl-Pro-(4-AmPhGly)P(OPh)2 with a kobs/[I] = 1830 M-1 s-1; all other phosphonates inhibited granzyme K weakly (kobs/[I] < 60 M-1 s-1). Human mast cell tryptase was inhibited slowly by these phosphonates with Cbz-LysP(OPh)2 as the best inhibitor (kobs/[I] = 89 M-1 s-1). The overall results suggest that scaffolds of Phe-Thr-(4-AmPhe) and Phe-Pro-Lys will be useful to create selective phosphonate inhibitors for granzymes A and K, respectively, and that P4 substituents offer opportunities to further enhance selectivity and reactivity." @default.
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• W2015697812 date "1998-06-01" @default.
• W2015697812 modified "2023-10-02" @default.
• W2015697812 title "Synthesis and Evaluation of Diphenyl Phosphonate Esters as Inhibitors of the Trypsin-like Granzymes A and K and Mast Cell Tryptase" @default.
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• W2015697812 doi "https://doi.org/10.1021/jm970543s" @default.
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