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- W2039904623 abstract "Sphingolipid signaling plays an important, yet not fully understood, role in diverse aspects of cellular life. Sphingomyelinase is a major enzyme in these signaling pathways, catalyzing hydrolysis of sphingomyelin to ceramide and phosphocholine. To address the related membrane dynamical structural changes and their feedback to enzyme activity, we have studied the effect of enzymatically generated ceramide in situ on the properties of a well-defined lipid model system. We found a gel-phase formation that was about four times faster than ceramide generation due to ceramide-sphingomyelin pairing. The gel-phase formation slowed down when the ceramide molar ratios exceeded those of sphingomyelin and stopped just at the solubility limit of ceramide, due to unfavorable pairwise interactions of ceramide with itself and with monounsaturated phosphatidylcholine. A remarkable correlation to in vitro experiments suggests a regulation of sphingomyelinase activity based on the sphingomyelin/ceramide molar ratio." @default.
- W2039904623 created "2016-06-24" @default.
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- W2039904623 date "2010-07-01" @default.
- W2039904623 modified "2023-09-27" @default.
- W2039904623 title "Implication of Sphingomyelin/Ceramide Molar Ratio on the Biological Activity of Sphingomyelinase" @default.
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- W2039904623 doi "https://doi.org/10.1016/j.bpj.2010.04.028" @default.
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