The natural product, cyclophellitol and its aziridine analogue are potent mechanism-based retaining β-glucosidase inhibitors. In this paper we explore the inhibitory potency of a number of cyclophellitol analogues against the three human retaining β-glucosidases, GBA, GBA2 and GBA3. We demonstrate that N-alkyl cyclophellitol aziridine is at least equally potent in inhibiting the enzymes evaluated as its N-acyl congener, whereas the N-sulfonyl analogue is a considerably weaker inhibitor. Our results complement the literature on the inhibitory potency of cyclophellitol analogues and hold promise for the future design of more effective activity-based retaining glycosidase probes with respect to probe stability in physiological media.
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http://dx.doi.org/10.1039/c4ob01611d | DOI Listing |
Chemistry
June 2024
Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands.
Glycoside hydrolases (glycosidases) take part in myriad biological processes and are important therapeutic targets. Competitive and mechanism-based inhibitors are useful tools to dissect their biological role and comprise a good starting point for drug discovery. The natural product, cyclophellitol, a mechanism-based, covalent and irreversible retaining β-glucosidase inhibitor has inspired the design of diverse α- and β-glycosidase inhibitor and activity-based probe scaffolds.
View Article and Find Full Text PDFOrg Biomol Chem
January 2022
York Structural Biology Laboratory, Department of Chemistry, The University of York, York YO10 5DD, UK.
-β-mannosidases are a broad class of stereochemically retaining hydrolases that are essential for the breakdown of complex carbohydrate substrates found in all kingdoms of life. Yet the detection of -β-mannosidases in complex biological samples remains challenging, necessitating the development of new methodologies. Cyclophellitol and its analogues selectively label the catalytic nucleophiles of retaining glycoside hydrolases, making them valuable tool compounds.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
March 2021
York Structural Biology Laboratory, Department of Chemistry, The University of York, Heslington, York, YO10 5DD, UK.
The recent discovery of zinc-dependent retaining glycoside hydrolases (GHs), with active sites built around a Zn(Cys) (Glu) coordination complex, has presented unresolved mechanistic questions. In particular, the proposed mechanism, depending on a Zn-coordinated cysteine nucleophile and passing through a thioglycosyl enzyme intermediate, remains controversial. This is primarily due to the expected stability of the intermediate C-S bond.
View Article and Find Full Text PDFFEBS J
February 2019
Department of Bio-organic Synthesis, Leiden Institute of Chemistry, Leiden University, The Netherlands.
Glucocerebrosidase (GBA) is a lysosomal β-glucosidase-degrading glucosylceramide. Its deficiency causes Gaucher disease (GD), a common lysosomal storage disorder. Carrying a genetic abnormality in GBA constitutes at present the largest genetic risk factor for Parkinson's disease (PD).
View Article and Find Full Text PDFPlant Physiol
May 2018
Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom
With nearly 140 α-glycosidases in 14 different families, plants are well equipped with enzymes that can break the α-glucosidic bonds in a large diversity of molecules. Here, we introduce activity-based protein profiling (ABPP) of α-glycosidases in plants using α-configured cyclophellitol aziridine probes carrying various fluorophores or biotin. In Arabidopsis (), these probes label members of the GH31 family of glycosyl hydrolases, including endoplasmic reticulum-resident α-glucosidase-II Radial Swelling3/Priority for Sweet Life5 (RSW3/PSL5) and Golgi-resident α-mannosidase-II Hybrid Glycosylation1 (HGL1), both of which trim -glycans on glycoproteins.
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