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. 1978 Nov 1;175(2):737–742. doi: 10.1042/bj1750737

Further characterization of galactosylhydroxylysyl glucosyltransferase from chick embryos. Amino acid composition and acceptor specificity.

H Anttinen, R Myllylä, K I Kivirikko
PMCID: PMC1186124  PMID: 743222

Abstract

A modified purification procedure, consisting of affinity chromatographies on concanavalin A-agarose, collagen-agarose and UDP-glucose-derivative-agarose and one gel filtration, is reported for galactosylhydroxylysyl glucosyltransferase. The enzyme obtained is entirely pure when studied by sodium dodecyl sulphate/polyacrylamide-gel electrophoresis. The enzyme protein was rich in glutamic acid + glutamine, aspartic acid + asparagine, glycine and alanine. The enzyme catalysed no significant glucose transfer to any of the glycoproteins tested, except for collagens. This included all the glycoproteins that have previously served as glucosyl acceptors for impure enzyme preparations, thus indicating a high degree of specificity of the enzyme for galactosylhydroxylysine. Galactosylsphingosine would act as a glucosyl acceptor, however. This compound has a close structural similarity to galactosylhydroxylysine in that they both have an unsubstituted amino group next to the hydroxy group to which the galactose is attached.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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