Biosynthesis of sialosyllactotetraosylceramide in human colorectal carcinoma cells
- 28 March 1988
- journal article
- Published by Wiley in FEBS Letters
- Vol. 230 (1-2) , 147-150
- https://doi.org/10.1016/0014-5793(88)80659-8
Abstract
A monosialoganglioside, IV3-NeuNAcLcOse4Cer, has recently been detected in colorectal carcinoma cells, small cell lung carcinoma cells, embryonal carcinoma cells and in human brain extracts. We report here the presence of a CMP-sialic: LcOse4Cer sialyl transferase activity in subcellular membrane fractions of the human colorectal carcinoma, SW1116, which recognizes the non-reducing terminal galactosyl moiety of lactotetraosylceramide. A convenient method for structural analysis of picomolar quantities of the radioactive enzymatic product(s) using bacterial endoglycoceramidase, sialidase and a viral sialidase is presented.Keywords
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