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© Thierry Blisnick & Philippe Bastin, Institut Pasteur
Bloodstream Trypanosoma brucei cell
Publication : Biology open

Flagellar membranes are rich in raft-forming phospholipids

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Biology open - 14 Aug 2015

Serricchio M, Schmid AW, Steinmann ME, Sigel E, Rauch M, Julkowska D, Bonnefoy S, Fort C, Bastin P, Bütikofer P

Link to Pubmed [PMID] – 26276100

Biol Open 2015 Aug;

The observation that the membranes of flagella are enriched in sterols and sphingolipids has led to the hypothesis that flagella might be enriched in raft-forming lipids. However, a detailed lipidomic analysis of flagellar membranes is not available. Novel protocols to detach and isolate intact flagella from Trypanosoma brucei procyclic forms in combination with reverse-phase liquid chromatography high-resolution tandem mass spectrometry allowed us to determine the phospholipid composition of flagellar membranes relative to whole cells. Our analyses revealed that phosphatidylethanolamine, phosphatidylserine, ceramide and the sphingolipids inositol phosphorylceramide and sphingomyelin are enriched in flagella relative to whole cells. In contrast, phosphatidylcholine and phosphatidylinositol are strongly depleted in flagella. Within individual glycerophospholipid classes, we observed a preference for ether-type over diacyl-type molecular species in membranes of flagella. Our study provides direct evidence for a preferential presence of raft-forming phospholipids in flagellar membranes of T. brucei.

http://www.ncbi.nlm.nih.gov/pubmed/26276100