Cited by 332Glycosylation and Glycoproteins ResearchCellular transport and secretionEndoplasmic Reticulum Stress and Disease

N-Linked Protein Glycosylation in the Endoplasmic Reticulum

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Breitling, J., Aebi, M.·2013·Cold Spring Harbor Perspectives in Biology

Abstract

The attachment of glycans to asparagine residues of proteins is an abundant and highly conserved essential modification in eukaryotes. The N-glycosylation process includes two principal phases: the assembly of a lipid-linked oligosaccharide (LLO) and the transfer of the oligosaccharide to selected asparagine residues of polypeptide chains. Biosynthesis of the LLO takes place at both sides of the endoplasmic reticulum (ER) membrane and it involves a series of specific glycosyltransferases that catalyze the assembly of the branched oligosaccharide in a highly defined way. Oligosaccharyltransferase (OST) selects the Asn-X-Ser/Thr consensus sequence on polypeptide chains and generates the N-glycosidic linkage between the side-chain amide of asparagine and the oligosaccharide. This ER-localized pathway results in a systemic modification of the proteome, the basis for the Golgi-catalyzed modification of the N-linked glycans, generating the large diversity of N-glycoproteome in eukaryotic cells. This article focuses on the processes in the ER. Based on the highly conserved nature of this pathway we concentrate on the mechanisms in the eukaryotic model organism Saccharomyces cerevisiae.

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Crossref · 10.1101/cshperspect.a013359

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  • The oligosaccharide-transferase complex transfers 14 component sugars composed of glucose and mannose from dolichol to nascent chain asparagines to complete N-linked glycosylation, which is essential for folding secreted and plasma membrane-linked proteins and mediated through glucose- and mannose-derived glycans.

    “This complex transfers 14 component sugars composed of glucose and mannose from dolichol to nascent chain asparagines to complete N-linked glycosylation, which is essential for folding secreted and plasma membrane-linked proteins and mediated through glucose- and mannose-derived glycans.53”

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Authors
Breitling, J., & Aebi, M.
Affiliations
ETH Zurich (CH)
Venue
Cold Spring Harbor Perspectives in Biology
Published
2013-06-10
Volume
5
Issue
8
Pages
a013359-a013359
ISSN
1943-0264 (ISSN-L)
OpenAlex
W2133197373
Cited by
332
References
0
Citations by year
2026: 33 · 2025: 36 · 2024: 40 · 2023: 33 · 2022: 29 · 2021: 35 · 2020: 27 · 2019: 25 · 2018: 16 · 2017: 20 · 2016: 12 · 2015: 16 · 2014: 9
Type
posted content
Language
en
Open access
Locations
  • Cold Spring Harbor Perspectives in Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glycosylation and Glycoproteins Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
Keywords
N-glycosylation, endoplasmic reticulum, lipid-linked oligosaccharides, oligosaccharyltransferase, asparagine-linked glycosylation, glycosyltransferases, N-glycoproteome, Saccharomyces cerevisiae, protein glycosylation
MeSH terms
Asparagine, Endoplasmic Reticulum, Glycosylation, Hexosyltransferases, Membrane Proteins, Oligosaccharides, Saccharomyces cerevisiae, Signal Transduction, Glycosyltransferases

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