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dc.contributor.authorDickie, Emily A.
dc.contributor.authorYoung, Simon A.
dc.contributor.authorSmith, Terry K.
dc.identifier.citationDickie , E A , Young , S A & Smith , T K 2019 , ' Substrate specificity of the neutral sphingomyelinase from Trypanosoma brucei ' , Parasitology , vol. 146 , no. 5 , pp. 604-616 .
dc.identifier.otherPURE: 256593980
dc.identifier.otherPURE UUID: faa6e3eb-a4d2-41e8-be06-757152c1a61e
dc.identifier.otherRIS: urn:F538112EAF4EAA8CD394D15275A18FB9
dc.identifier.otherScopus: 85056203657
dc.identifier.otherORCID: /0000-0003-1072-905X/work/50743670
dc.identifier.otherWOS: 000462767800007
dc.descriptionThis work was supported primarily through the European Community’s Seventh Framework Programme under grant agreements no. 602773 (Project KINDRED), with additional support from Wellcome Trust Project grant (086658); Medical Research Council (MR/M020118/1) and the School of Chemistry (The University of St Andrews).en
dc.description.abstractThe kinetoplastid parasite Trypanosoma brucei causes African trypanosomiasis in both humans and animals. Infections place a significant health and economic burden on developing nations in sub-Saharan Africa, but few effective anti-parasitic treatments are currently available. Hence, there is an urgent need to identify new leads for drug development. The T. brucei neutral sphingomyelinase (TbnSMase) was previously established as essential to parasite survival, consequently being identified as a potential drug target. This enzyme may catalyse the single route to sphingolipid catabolism outside the T. brucei lysosome. To obtain new insight into parasite sphingolipid catabolism, the substrate specificity of TbnSMase was investigated using electrospray ionization tandem mass spectrometry (ESI-MS/MS). Recombinant TbnSMase was shown to degrade sphingomyelin, inositol-phosphoceramide and ethanolamine-phosphoceramide sphingolipid substrates, consistent with the sphingolipid complement of the parasites. TbnSMase also catabolized ceramide-1-phosphate, but was inactive towards sphingosine-1-phosphate. The broad-range specificity of this enzyme towards sphingolipid species is a unique feature of TbnSMase. Additionally, ESI-MS/MS analysis revealed previously uncharacterized activity towards lyso-phosphatidylcholine despite the enzyme's inability to degrade phosphatidylcholine. Collectively, these data underline the enzyme's importance in choline homoeostasis and the turnover of sphingolipids in T. brucei.
dc.rights© 2018, Cambridge University Press. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at
dc.subjectActivity assayen
dc.subjectLipid catabolismen
dc.subjectLipid extractionen
dc.subjectMass spectrometryen
dc.subjectQH301 Biologyen
dc.titleSubstrate specificity of the neutral sphingomyelinase from Trypanosoma bruceien
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Biomedical Sciences Research Complexen
dc.description.statusPeer revieweden

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