Saskia V Oussoren

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Free sphingoid bases (lysosphingolipids) of primary storage sphingolipids are increased in tissues and plasma of several sphingolipidoses. As shown earlier by us, sphingoid bases can be accurately quantified using UPLC-ESI-MS/MS, particularly in combination with identical 13C-encoded internal standards. The feasibility of simultaneous quantitation of(More)
Oxidation of unsaturated fatty acids requires the action of auxiliary enzymes, such as Δ(3),Δ(2)-enoyl-CoA isomerases. Here we describe a detailed biochemical, molecular, histological, and evolutionary characterization of Eci3, the fourth member of the mammalian enoyl-CoA isomerase family. Eci3 specifically evolved in rodents after gene duplication of Eci2.(More)
Glucocerebrosidase (GBA) is a lysosomal β-glucosidase that degrades glucosylceramide. Its deficiency results in Gaucher disease (GD). We examined the effects of active site occupancy of GBA on its structural stability. For this, we made use of cyclophellitol-derived activity-based probes (ABPs) that bind irreversibly to the catalytic nucleophile (E340), and(More)
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