Section 49
Chapter 48,965

Enzymic hydrolysis of sphingolipids: Hydrolysis of ceramide lactoside by an enzyme from rat brain

Gatt, S.; Rapport, M.M.

Biochemical Journal 101(3): 680-686


ISSN/ISBN: 0264-6021
PMID: 16742444
Accession: 048964353

Ceramide lactoside [1-O-(galactosido-4-beta-glucosido)-2-N-acyl-sphingosine] was hydrolysed to ceramide glucoside and galactose by beta-galactosidase of rat brain. The reaction was not reversible, required cholate or taurocholate, had optimum pH5.0 and K(m) 2.2x10(-5)m. It was inhibited by gamma-galactonolactone and galactose as well as by ceramide, sphingosine and fatty acid. Ceramide lactoside could be degraded to ceramide, galactose and glucose by mixtures of rat-brain beta-galactosidase and ox-brain beta-glucosidase.

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