Investigation on the substrate specificity of human plasmin using tripeptidyl-p-nitroanilide substrates
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Add time:09/24/2019 Source:sciencedirect.com
The hydrolysis of 35 tripeptidyl-p-nitroanilides was studied with human plasmin and the kinetic parameters were determined. The individual contribution of the various side chains to the kinetic parameters was calculated by regression analysis. Considering Km, substrates having Z-D-Ile-Phe-Lys as well as H-D-Ile-Phe-Lys sequences were found to be the best, while B-Ile-Leu-Lys and pGlu-Leu-Lys sequences are the best for kcat. The Km values of substrates protected at N-terminus are lower, their kcat values are higher than those of the unprotected ones with the same sequence.
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