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Abstract
Mouse liver microsomes were shown to be active in the synthesis of sphingomyelin from ceramide and phosphatidylcholine in a reaction independent of CDPcholine. The conversion was not inhibited by calcium chelating reagents, and no evidence for the involvement of phospholipase C activity in the transformation could be adduced. Activity was also demonstrated in monkey liver and heart microsomes. Mouse brain microsomes produced a sphingomyelin analogue, tentatively identified as ceramide phosphorylethanolamine, but not sphingomyelin. Both [ 14C]ceramide and [G- 14C]phosphatidylethanolamine were precursors of the brain product, while phosphatidylcholine was inactive. Progress in the partial characterization of the liver enzyme is also described.
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Schedule a callMore From: Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism
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