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    Repair of BHK cell surface ganglioside GM3 after its degradation by extracellular sialidase

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    Date
    1998
    Author
    Sillence, Daniel J.;
    Allan, D.
    Metadata
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    Abstract
    Treatment of BHK fibroblasts with V. cholerae sialidase for 20 min caused the breakdown of about 70% of total cellular ganglioside GM3 and the production of an approximately equivalent amount of lactosylceramide. On removal of the enzyme, a slow resynthesis of GM3 from lactosylceramide was observed, equivalent to about 5-6%/h of the degraded GM3. Resynthesis of degraded surface ganglioside has not previously been observed, but its magnitude is similar to previous measurements of the rate of protein resialylation after sialidase treatment. This suggests that resialylation of both lipid and protein is limited by vesicular transport of plasma membrane components through the trans-Golgi network [TGN] where sialyltransferase is thought to be localized. In contrast, resynthesis of sphingomyelin which has been degraded at the cell surface by exogenous sphinogomyelinase is about five times faster than resynthesis of GM3 and may involve non-vesicular transport of ceramide.
    Description
    Citation : Sillence, D.J. and Allan, D. (1998) Repair of BHK cell surface ganglioside GM3 after its degradation by extracellular sialidase. Molecular Membrane Biology, 15 (4), pp. 229-235
    URI
    http://hdl.handle.net/2086/10757
    DOI
    http://dx.doi.org/10.3109/09687689709044325
    Research Institute : Leicester Institute for Pharmaceutical Innovation - From Molecules to Practice (LIPI)
    Peer Reviewed : Yes
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    • Leicester School of Pharmacy [1196]

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