Overexpression of human acid ceramidase precursor and variants of the catalytic center in Sf9 cells : Analysis of ceramidase maturation , autocatalytic processing and interaction with Sap-D
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Purification and characterization of recombinant, human acid ceramidase. Catalytic reactions and interactions with acid sphingomyelinase.
Human acid ceramidase was overexpressed in Chinese hamster ovary cells by amplification of the transfected, full-length cDNA. The majority of the overexpressed enzyme was secreted into the culture media and purified to apparent homogeneity. The purified protein contained the same 13-(alpha) and 40 (beta)-kDa subunits as human acid ceramidase from natural sources, had an acidic pH optimum (4.5),...
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A series of structurally related 2,4-dioxopyrimidine-1-carboxamide derivatives as highly potent inhibitors against acid ceramidase were subjected to hologram quantitative structure-activity relationship (HQSAR) analysis. A training set containing 24 compounds served to establish the HQSAR model. The best HQSAR model was generated using atoms, bond, connectivity, donor and acceptor as fragment d...
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The lysosomal degradation of ceramide is catalyzed by acid ceramidase and requires sphingolipid activator proteins (SAP) as cofactors in vivo. The aim of this study was to investigate how ceramide is hydrolyzed by acid ceramidase at the water-membrane interface in the presence of sphingolipid activator proteins in a liposomal assay system. The degradation of membrane-bound ceramide was signific...
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Carnosic acid and Rosmarinic acid are family of polyphenols that are found in Rosmary plant. They have property biological behaviors such as anti-cancer, anti-viral and anti-oxidants. This study compared the effects of these two compounds based on ceramide metabolism in cell line of Hep- G2. In this experimental study, Hep-G2 cells were cultured in DMEM supplemented containing bovine fetal seru...
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