Bioresponsive pseudoGlucosinolates (psGSLs) release Isothiocyanates (ITCs) in the Presence of Nitroreductases

08 July 2024, Version 2

Abstract

Glucosinolates (GSLs) are secondary metabolites produced as part of an herbivore defence system in plants of the order Brassicales. GSLs release isothiocyanates (ITCs) upon activation by the myrosinase. Beyond their herbivore feeding deterrent properties, these ITCs have multiple interesting bioactivities. However, their release is limited by the presence of myrosinase. Here, we report the concept of pseudoglucosinolates (psGSLs) hijacking the natural release mechanism of GSLs for the release of ITCs and adapting it to nitroreductase as the triggering enzymes. We provide proof-of-concept for nitroreductase-responsive psGSLs and demonstrate their potential for peptide labelling, ITC-prodrug approaches and for in vivo applications using the nematode of C. elegans.

Keywords

pseudoglucosinolates
artificial glucosinolates
isothiocyanates
bioresponsive protein labeling
prodrugs

Supplementary materials

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Supporting Information
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Description of general experimental procedure, synthesis of the compounds, biochemical evaluation and data of compound characterization.
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