N-Glycans
- PMID: 28876855
- Bookshelf ID: NBK453020
- DOI: 10.1101/glycobiology.3e.009
N-Glycans
Excerpt
N-Glycans are covalently attached to protein at asparagine (Asn) residues by an N-glycosidic bond. Although diverse sugars are attached to Asn in prokaryotes (Chapters 21 and 22), all eukaryotic N-glycans begin with GlcNAcβ1–Asn and are the focus of this chapter. The biosynthesis of N-glycans is most complex in mammals and is described here in detail. Terminal sugars that largely determine the diversity of N-glycans are described in Chapter 14. Glycosylation-mediated quality control of protein folding by N-glycans is presented in Chapter 39, and the mannose-6-phosphate recognition determinant on N-glycans, necessary for targeting lysosomal hydrolases to lysosomes, is described in Chapter 33. Human congenital disorders of glycosylation arising from defects in N-glycan synthesis are discussed in Chapter 45.
Copyright 2015-2017 by The Consortium of Glycobiology Editors, La Jolla, California. All rights reserved.
Sections
- DISCOVERY AND BACKGROUND
- MAJOR CLASSES AND NOMENCLATURE IN EUKARYOTES
- PREDICTING SITES OF N-GLYCOSYLATION IN EUKARYOTES
- ISOLATION, PURIFICATION, AND ANALYSIS
- SYNTHESIS OF N-GLYCANS IN EUKARYOTES
- THE PHOSPHORYLATED N-GLYCANS ON LYSOSOMAL HYDROLASES
- TRANSFERASES AND TRANSPORTERS IN N-GLYCAN SYNTHESIS
- GLYCOPROTEINS COMPRISE MANY GLYCOFORMS
- FUNCTIONS OF N-GLYCANS
- ACKNOWLEDGMENTS
- FURTHER READING
References
-
- Waechter CJ, Lennarz WJ. 1976. The role of polyprenol-linked sugars in glycoprotein synthesis. Annu Rev Biochem 45: 95–112. - PubMed
-
- Snider MD, Sultzman LA, Robbins PW. 1980. Transmembrane location of oligosaccharide-lipid synthesis in microsomal vesicles. Cell 21: 385–392. - PubMed
-
- Kornfeld R, Kornfeld S. 1985. Assembly of asparagine-linked oligosaccharides. Annu Rev Biochem 54: 631–664. - PubMed
-
- Herscovics A. 1999. Importance of glycosidases in mammalian glycoprotein biosynthesis. Biochim Biophys Acta 1473: 96–107. - PubMed
-
- Berninsone PM, Hirschberg CB. 2000. Nucleotide sugar transporters of the Golgi apparatus. Curr Opin Struct Biol 10: 542–547. - PubMed
Publication types
LinkOut - more resources
Full Text Sources