dipeptidyl hydroxamic acids (H-X-Gly-NHOH: X = amino acid residues) was synthesized, and the inhibitory activity against Jackbean and Proteus mirabilis ureases [EC3.5.1.5] was examined. A number of H-X-Gly-NHOH inhibited Jackbeanurease with an I50 of the order of 10(-6) M and inhibited Proteus mirabilis urease with an I50 of the order of 10(-5) M. The inhibition against Jackbeanurease was more potent
A series of tripeptidyl analogues carrying hydroxamic acid residue at the C-terminus of the molecule were synthesized, and their inhibitory activities against vertebrate collagenase and other metalloenzymes including bacterial collagenase were examined. Both Z-Pro-Leu-Ala-NHOH and Z-Pro-D-Leu-D-Ala-NHOH showed highly specific and potent inhibitory activity against tadpole and human skin collagenases with an IC50 of 10-6 M order.