An Electrophoresis-Based Assay For Glycosyltransferase Activity

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Authors
Lee, K.B.
Desai, U.R.
Palcic, M.M.
Hindsgaul, O.
Linhardt, Robert J.
Issue Date
1992-08-15
Type
Article
Language
ENG
Keywords
Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
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Abstract
Polyacrylamide gel electrophoresis (PAGE) and capillary zone electrophoresis (CZE) were used to measure the activity of glycosyltransferases. Acceptor molecules were prepared by reductive amination of the monopotassium 7-amino-1,3-naphthalenedisulfonic acid (AGA) Schiff base with sugars. The resulting sugar conjugates were purified by gradient PAGE and recovered using semidry electrotransfer into a positively charged nylon membrane. The beta(1----4)galactosyltransferase was shown, by PAGE analysis, to transfer a beta-galactosyl residue to the AGA conjugate of beta-D-GlcNAc-(1----4)-beta-D-GlcNAc-(1----4)-D-GlcNAc (compound 4). Similarly, alpha(1----2)fucosyltransferase isolated from porcine submaxillary glands was shown to transfer fucose from GDP-fucose to the AGA conjugate of beta-D-Gal-(1----4)-beta-D-GlcNAc-(1----6)-D-Gal (compound 5). This conjugate (compound 5) was also an acceptor for the alpha(1----3/4)fucosyltransferase partially purified from human milk. The latter reaction was followed by both gradient PAGE and CZE, having sensitivities of 200 pmol and 80 fmol, respectively.
Description
Analytical Biochemistry, 205, 108-114
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Full Citation
An Electrophoresis-Based Assay For Glycosyltransferase Activity, K.B. Lee, U.R. Desai, M.M. Palcic, O. Hindsgaul, R.J. Linhardt, Analytical Biochemistry, 205, 108-114 (1992).
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10960309
32697
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