Abstract
Influenza C virus spike glycoprotein HEF specifically recognizes glycoconjugates containing 9-O-acetyl-N-acetylneuraminic acid. The same protein also contains an esterase activity. Taking advantage of these two properties, influenza C virus was used as a very sensitive probe for the detection of traces of 9-O-acetyl-N-acetylneuraminic acid in human leucocytes. The binding of influenza C virus to leucocyte glycoproteins and gangliosides separated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis and thin-layer chromatography, respectively, was assayed using a chromogenic esterase substrate. In this way, glycoproteins of B-lymphocytes and T-lymphocytes were found to contain 9-O-acetylated sialic acids. Of the various 9-O-acetylated gangliosides detected, one had the characteristics of 9-O-acetylated GD3. The identification of 9-O-acetylated sialic acids on distinct glycoproteins and glycolipids should be helpful in assigning a physiological role to this sugar.
Original language | English (US) |
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Pages (from-to) | 343-349 |
Number of pages | 7 |
Journal | Glycobiology |
Volume | 4 |
Issue number | 3 |
DOIs | |
State | Published - Jun 1994 |
Externally published | Yes |
Keywords
- Gangliosides
- Influenza C virus
- Lymphocytes
- O-acetylation
- Sialic acids
ASJC Scopus subject areas
- Biochemistry