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Sub-Compartmental Organization of Golgi-Resident N-Glycan Processing Enzymes in Plants

Molecular Plant 2011年第2期4卷 220-228页

作者： Jennifer Schoberer richard strasser School of Life Sciences Oxford Brookes University Headington Campus Gipsy Lane Oxford OX3 OBP UK Department of Applied Genetics and Cell Biology University of Natural Resources and Life Sciences Vienna Austria

In all eukaryotes, the Golgi apparatus is the main site of protein glycosylation. It is widely accepted that the glycosidases and glycosyltransferases involved in N-glycan processing are found concentrated within the Golgi stack where they provide their function. This means that enzymes catalyzing early steps in the processing pathway are located mainly at the cis-side, whereas late-acting enzymes mostly locate to the trans-side of the stacks, creating a non-uniform distribution along the cis-trans axis of the Golgi. There is compelling evidence that the information for their sorting to specific Golgi cisternae depends on signals encoded in the proteins themselves as well as on the trafficking machinery that recognizes these signals and it is believed that cisternal sub-compartmentalization is achieved and maintained by a combination of retention and retrieval mechanisms. Yet, the signals, mechanism（s）, and molecular factors involved are still unknown. Here, we address recent findings and summarize the current understanding of this fundamental process in plant cell biology.

关键词： Endomembrane system Golgi apparatus glycosylation glycosyltransferase.

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