Abstract:
:Neutrophil serine proteases, proteinase 3 (PR3) and human neutrophil elastase (HNE), are considered as targets for chronic inflammatory diseases. Despite sharing high sequence similarity, the two enzymes have different substrate specificities and functions. While a plethora of HNE inhibitors exist, PR3 specific inhibitors are still in their infancy. We have designed ketomethylene-based inhibitors for PR3 that show low micromolar IC50 values. Their synthesis was made possible by amending a previously reported synthesis of ketomethylene dipeptide isosteres to allow for the preparation of derivatives suitable for solid phase peptide synthesis. The best inhibitor (Abz-VADnV[Ψ](COCH2)ADYQ-EDDnp) was found to be selective for PR3 over HNE and to display a competitive and reversible inhibition mechanism. Molecular dynamics simulations show that the interactions between enzyme and ketomethylene-containing inhibitors are similar to those with the corresponding substrates. We also confirm that N- and C-terminal FRET groups are important for securing high inhibitory potency toward PR3.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Budnjo A,Narawane S,Grauffel C,Schillinger AS,Fossen T,Reuter N,Haug BEdoi
10.1021/jm500782ssubject
Has Abstractpub_date
2014-11-26 00:00:00pages
9396-408issue
22eissn
0022-2623issn
1520-4804journal_volume
57pub_type
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