Journal article
Characterization of a sphingomyelinase activity in Saccharomyces cerevisiae
Archives of biochemistry and biophysics, Vol.340(1), pp.101-110
04/01/1997
Handle:
https://hdl.handle.net/2376/106942
PMID: 9126282
Abstract
Sphingomyelinases (SMase), which hydrolyze sphingolipids to yield ceramide, participate in signal transduction pathways in mammalian cells. Although yeast express many homologs of mammalian signaling proteins, SMase activity had not been previously demonstrated in yeast. In this study, we used an in vitro assay to characterize yeast SMase activity. Activity was detected in yeast membranes at both acid and neutral pH. The enzyme exhibited a requirement for magnesium or manganese, and was sensitive to detergents. The pI of the enzyme was approximately 5.9. SMase was separable from phospholipase D (PLD) activity, and was expressed at normal levels in yeast lacking expression of PLD1. While sphingosine and phytosphingosine inhibited growth, other sphingolipid metabolites had no effect on yeast growth. Intact yeast generate ceramide from exogenous sphingomyelin. These studies demonstrate that yeast express a membrane-localized neutral SMase activity.
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Details
- Title
- Characterization of a sphingomyelinase activity in Saccharomyces cerevisiae
- Creators
- K M Ella - Department of Cell and Molecular Pharmacology, Medical University of South Carolina, Charleston 29425-2251, USAC QiJ W DolanR P ThompsonK E Meier
- Publication Details
- Archives of biochemistry and biophysics, Vol.340(1), pp.101-110
- Academic Unit
- Pharmaceutical Sciences, Department of
- Publisher
- United States
- Grant note
- HL07260 / NHLBI NIH HHS CA58640 / NCI NIH HHS
- Identifiers
- 99900546714301842
- Language
- English
- Resource Type
- Journal article