Ectopic localizations of Golgi glycosyltransferases

Glycosyltransferases involved in N- and O-glycan chain elongation and termination are localized in the Golgi apparatus. Early evidence in support of this rule was based on fractionation techniques and was corroborated by numerous immunocytochemical studies. Usually these studies were confined to cul...

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Bibliographic Details
Published in:Glycobiology (Oxford) 2002-02, Vol.12 (2), p.29R-36R
Main Author: Berger, Eric G
Format: Article
Language:English
Subjects:
Animals
Cell Line
Glycosylation
Glycosyltransferases - metabolism
Golgi Apparatus - enzymology
Humans
Protein Transport
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Summary:Glycosyltransferases involved in N- and O-glycan chain elongation and termination are localized in the Golgi apparatus. Early evidence in support of this rule was based on fractionation techniques and was corroborated by numerous immunocytochemical studies. Usually these studies were confined to cultured cell lines exhibiting little differentiation features, such as HeLa cells. However, localization studies conducted in primary cell cultures (e.g., human umbilical vein endothelial cells), cells obtained ex vivo (e.g., sperm cells), and tissue sections (e.g., intestinal, renal, or hepatic tissue) often reveal ectopic localizations of glycosyltransferases usually at post-Golgi sites, including the plasma membrane. Hence, extracellular cues resulting from specific adhesion sites may influence post-Golgi trafficking routes, which may be reflected by ectopic localization of Golgi enzymes.
ISSN:0959-6658
1460-2423
DOI:10.1093/glycob/12.2.29R