Tetrapeptide p-nitroanilides containing (E)-dehydrophenylalanine were synthesized and evaluated as inhibitors and substrates of cathepsin C. Peptides containing a free, unblocked amino group appeared to be quite good substrates of the enzyme, whereas fully protected peptides acted as very weak inhibitors. Structural studies by means of NMR and CD, alongside with molecular modelling, have proved that these peptides are hydrolysed in one step by direct removal of p-nitroaniline from the tetrapeptide.
合成了含有 (E)-dehydrophenylalanine 的四肽对硝基苯胺,并将其作为 cathepsin C 的抑制剂和底物进行了评估。通过核磁共振和 CD 以及分子建模进行的结构研究证明,这些肽可通过直接去除四肽中的对硝基苯胺一步水解。