Imidazolium-based warheads strongly influence activity of water-soluble peptidic transglutaminase inhibitors

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New peptidic water-soluble inhibitors are reported. In addition to the carboxylate moiety, a new polar warhead was explored. Depending on the size of its substituents, the newly appended imidazolium scaffold designed to enhance the hydrophilic character of the inhibitors could induce a good inhibition for tissue transglutaminase (TG2) and blood coagulation factor XIIIa (FXIIIa). Correlated with the narrow tunnel that hosts the target catalytic cysteine residue, the various modulations suggest a bent conformation of the ligands as the binding pattern mode. Analogues in the dialkylsulfonium series were also tested and showed specificity for TG2 over FXIIIa.

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Original languageEnglish
Pages (from-to)526-530
Number of pages5
JournalEuropean Journal of Medicinal Chemistry
Early online date7 Jun 2013
Publication statusPublished - Aug 2013

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Copyright © 2013 Elsevier Masson SAS. All rights reserved.


  • coagulation factor XIIIa (FXIIIa), dialkylsulfonium, imidazolium warheads, peptidic inhibitors, tissue transglutaminase (TG2)

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