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000613730 1001_ $$aListian, Stevanus A.$$b0
000613730 245__ $$aComplex Sphingolipid Profiling and Identification of an Inositol-Phosphorylceramide Synthase in Dictyostelium discoideum
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000613730 520__ $$aDictyostelium discoideum is a professional phagocyte frequently used to study cellular processes underlying the recognition, engulfment, and infection course of microbial pathogens. Sphingolipids are abundant components of the plasma membrane that bind cholesterol, control membrane properties, participate in signal transmission, and serve as adhesion molecules in recognition processes relevant to immunity and infection. By combining lipidomics with a bioinformatics-based cloning strategy, we show here that D. discoideum produces phosphoinositol-containing sphingolipids with predominantly phytoceramide backbones. Cell-free expression of candidate inositol-phosphorylceramide (IPC) synthases from D. discoideum enabled identification of an enzyme that selectively catalyzes the transfer of phosphoinositol from phosphatidylinositol onto ceramide. The IPC synthase, DdIPCS1, shares multiple sequence motifs with yeast IPC and human sphingomyelin synthases and localizes to the Golgi apparatus as well as the contractile vacuole of D. discoideum. These findings open up important opportunities for exploring a role of sphingolipids in phagocytosis and infection across major evolutionary boundaries.
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000613730 536__ $$0G:(GEPRIS)516904847$$aSFB 1557 P07 - Untersuchung des Zusammenspiels zwischen der Plastizität vakuolärer Kontaktstellen und der Sphingolipid-Homöostase (P07) (516904847)$$c516904847$$x2
000613730 536__ $$0G:(GEPRIS)531703706$$aDFG project G:(GEPRIS)531703706 - Entschlüsselung der molekularen Mechanismen des Austritts von Orientia tsutsugamushi aus der Wirtszelle (531703706)$$c531703706$$x3
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000613730 7001_ $$aMazur, Anna-Carina$$b1
000613730 7001_ $$aKol, Matthijs$$b2
000613730 7001_ $$aUfelmann, Edwin$$b3
000613730 7001_ $$aEising, Sebastian$$b4
000613730 7001_ $$aFröhlich, Florian$$b5
000613730 7001_ $$aWalter, Stefan$$b6
000613730 7001_ $$aHolthuis, Joost C. M.$$b7
000613730 7001_ $$0P:(DE-H253)PIP1106715$$aBarisch, Caroline$$b8$$eCorresponding author
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